NetBSD Multimedia Resources List
Links on this page refer to multimedia resources (podcast, vodcast,
audio recordings, video recordings, photos) related to NetBSD or
of interest for NetBSD users.
This list is available as chronological
overview, as a tag cloud and
via the sources.
This list is also available as RSS feed
If you know any resources not listed here, or notice any dead links,
please send details to
Edwin Groothuis so that
it can be included or updated.
Tag: freebsd
FreeBSD Security Officer Colin Percival
Source: bsdtalk
Added: 02 July 2010
Tags: bsdtalk, interview, bsdcan, bsdcan2010, freebsd, portsnap, freebsd-update, tarsnap, colin percival
Ogg version (20 minutes), MP3 version (9 Mb, 20 minutes)
Interview from BSDCan 2010 with Colin Percival. We
talk about cryptography, Portsnap, FreeBSD Update,
and Tarsnap.
Jeff Roberson
Source: bsdtalk
Added: 05 February 2010
Tags: bsdtalk, interview, ule, freebsd, jeff roberson
Ogg version (30 minutes), MP3 version (14 Mb, 30 minutes)
Interview with FreeBSD committer Jeff Roberson. We
talk about his recent work on softupdates journaling
(SUJ) and also the ULE scheduler.
At MeetBSD with some of the FreeBSD Core Team
Source: bsdtalk
Added: 18 November 2008
Tags: bsdtalk, interview, freebsd core team, meetbsd2008, meetbsd, robert watson, brooks davis, kris kennaway, peter wemm, philip paeps, freebsd, subversion
Ogg version (38 minutes), MP3 version (18 Mb, 38 minutes)
A conversation with some of the FreeBSD Core Team
at MeetBSD California 2008. I speak with Brooks
Davis, Kris Kennaway, Robert Watson, Peter Wemm,
and Philip Paeps about the recent core team election,
FreeBSD 7.1 and 8, Developer Summits, and the move
to Subversion.
Jeremy White, Founder of CodeWeavers
Source: bsdtalk
Added: 03 May 2008
Tags: bsdtalk, interview, freebsd, codeweavers, crossover, jeremy white
Ogg version (16 minutes), MP3 version (7 Mb, 16 minutes)
Interview with Jeremy White, Founder of CodeWeavers.
We talk about the recent availability of an
experimental build of Crossover Games for BSD.
FreeBSD Developer Alexander Motin
Source: bsdtalk
Added: 18 April 2008
Tags: bsdtalk, interview, freebsd, mpd, alexander motin
Ogg version (16 minutes), MP3 version (8 Mb, 16 minutes)
Interview with FreeBSD Developer Alexander Motin.
We talk about mpd, the netgraph based Multi-link
PPP Daemon. For more information, see
http://mpd.sourceforge.net/.
FreeBSD Lead Release Engineer Ken Smith
Source: bsdtalk
Added: 01 March 2008
Tags: bsdtalk, interview, freebsd, release engineer, ken smith
Ogg version (16 minutes), MP3 version (7 Mb, 16 minutes)
Interview with FreeBSD Lead Release Engineer Ken Smith.
FreeBSD Developer Diane Bruce
Source: bsdtalk
Added: 10 May 2007
Tags: bsdtalk, interview, freebsd, diana bruce
Ogg version (10 minutes), MP3 version (5 Mb, 10 minutes)
Interview with FreeBSD developer Diane Bruce. We
talk about Ham Radio on BSD.
Slides from one of her talks:
http://www.oarc.net/hamradio_on_freebsd.pdf
Cisco Distinguished Engineer Randall Stewart
Source: bsdtalk
Added: 08 March 2007
Tags: bsdtalk, interview, cisco, freebsd, stream control transmission protocol, randall stewart
Ogg version (35 minutes), MP3 version (17 Mb, 35 minutes)
Interview with Cisco Distinguished Engineer Randall
Stewart. We talk about the Stream Control Transmission
Protocol and his work bringing it to FreeBSD.
FreeBSD Developer George Neville-Neil
Source: bsdtalk
Added: 27 February 2007
Tags: bsdtalk, interview, freebsd, packet construction set, george neville-neil
Ogg version (19 minutes), MP3 version (10 Mb, 19 minutes)
Interview with FreeBSD developer George Neville-Neil. We talk about the packet construction set and the packet debugger.
FreeBSD Developer Joseph Koshy
Source: bsdtalk
Added: 11 December 2006
Tags: bsdtalk, interview, freebsd, libelf, joseph koshy
Ogg version (9 minutes), MP3 version (5 Mb, 9 minutes)
Interview with FreeBSD developer Joseph Koshy about libELF. You can find more information about libELF at http://wiki.freebsd.org/LibElf.
FreeBSD Developer Kip Macy
Source: bsdtalk
Added: 07 December 2006
Tags: bsdtalk, interview, freebsd, ultrasparc t1, kip macy
Ogg version (22 minutes), MP3 version (10 Mb, 22 minutes)
Interview with FreeBSD developer Kip Macy. We talk about the Ultrasparc T1 port.
FreeBSD Port Committer Thomas McLaughlin
Source: bsdtalk
Added: 01 December 2006
Tags: bsdtalk, interview, freebsd, bsd#, thomas mclaughlin
Ogg version (18 minutes), MP3 version (9 Mb, 18 minutes)
Interview with FreeBSD Port Committer Thomas McLaughlin about the BSD# project.
FreeBSD Release Engineer Bruce Mah
Source: bsdtalk
Added: 29 November 2006
Tags: bsdtalk, interview, freebsd, release engineer, bruce mah
Ogg version (15 minutes), MP3 version (7 Mb, 15 minutes)
Interview with FreeBSD Release Engineer Bruce Mah.
P1B: Tracking FreeBSD in a Commercial Setting
Source: YouTube bsdconferences channel
Added: 27 March 2009
Tags: youtube, presentation, asiabsdcon2008, asiabsdcon, freebsd, warner losh
Flash (33:40)
P1B: Tracking FreeBSD in a Commercial Setting
AsiaBSDCon 2008, M. Warner Losh
clive URL: http://www.youtube.com/watch?v=VaZ9Ef04bJg
Using FreeBSD to Promote Open Source Development Methods, Brooks Davis, AsiaBSDCon 2008
Source: YouTube bsdconferences channel
Added: 21 February 2009
Tags: youtube, presentation, asiabsdcon2008, asiabsdcon, freebsd, promotion, open source development models, brooks davis
Flash (30:07)
Using FreeBSD to Promote Open Source Development
Methods, Brooks Davis, AsiaBSDCon 2008
clive URL: http://www.youtube.com/watch?v=4lcrinKBMas
FreeBSD Kernel Internals, Dr. Marshall Kirk McKusick
Source: YouTube bsdconferences channel
Added: 19 January 2009
Tags: youtube, course, freebsd, design and implementation of the freebsd operating system, kirk mckusick
Flash (59:57)
The first hour of Marshall Kirk McKusick's course
on FreeBSD kernel internals based on his book, The
Design and Implementation of the FreeBSD Operating
System. This course has been given at BSD Conferences
and technology companies around the world.
clive URL: http://www.youtube.com/watch?v=nwbqBdghh6E
May 2008 developer Vimage report
Source: YouTube bsdconferences channel
Added: 31 December 2008
Tags: youtube, freebsd, vimage, marko zec, julian elischer
Flash (2:44:36)
A sneak peak into the FreeBSD development process.
Warning 2 hours! filmed over 2 days.
(The schedule worked out was optimistic to say the
least but it's still looking ok...)
Marko Zec and Julian Elischer report back to the
developers at BSDCan on the progress on virtualizing
the network stack in FreeBSD. This has been a long
term project but at the time of this recording was
just reaching the point of feasibility. In this
video you can see some of the dynamics of the group
as developers become familiar with the project and
discussions take place regarding such things as
maintainability, ABI compatibility, and even what
to call the feature. In this video you can see the
decision being made by a "quorum" of developers to
take this project mainstream.
The sound is less that perfect, but it's what we have.
This is a montage of 3 video sources, one of which
is a lower resolution, but at times it was the only
camera capturing the action. (the other ran out of
tape for a while)
Thanks to Ed Maste for the added footage.
I will be doing more editing later and will be
substituting in better footage in some places.
clive URL: http://au.youtube.com/watch?v=Px-pSXm32dE
ZFS in FreeBSD, by Pawel Jakub Dawidek
Source: YouTube bsdconferences channel
Added: 31 December 2008
Tags: youtube, freebsd, zfs, pawel jakub
Flash (54:34)
Pawel goes over ZFS, and tells us the state of the
FreeBSD port. Source: Julian
clive URL: http://au.youtube.com/watch?v=5-CR3o-Q2CU
Isilon and FreeBSD
Source: YouTube bsdconferences channel
Added: 31 December 2008
Tags: youtube, freebsd, isilon, zach loafman
Flash (28:58)
Zach Loafman explains how Isilon uses FreeBSD and
how the company adds to it and interacts with the
FreeBSD community.
clive URL: http://au.youtube.com/watch?v=OlMocIwM5QU
FreeBSD networking work summary
Source: YouTube bsdconferences channel
Added: 16 December 2008
Tags: youtube, freebsd, networking, robert watson
Flash (55:21)
Robert Watson reports on work currently under way
to optimize the networking stack for new hardware.
Source: Julian
clive URL: http://www.youtube.com/watch?v=ohLVNmI3lCg
Embedded FreeBSD
Source: YouTube bsdconferences channel
Added: 07 December 2008
Tags: youtube, meetbsd, meetbsd2007, embedded, freebsd, polish, rafal jaworowski
Flash (1:11:09)
"FreeBSD do zabudowy czyli nie tylko pecety", Rafal
Jaworowski at MeetBSD 2007 in Warsaw, Poland.
clive URL: http://www.youtube.com/watch?v=2HcIJvJX4y8
New features in FreeBSD 7
Source: YouTube bsdconferences channel
Added: 07 December 2008
Tags: youtube, meetbsd, meetbsd2007, freebsd, kris kennaway
Flash (1:07:18)
"New features and improvements in FreeBSD 7", Kris
Kennaway at MeetBSD 2007 in Warsaw, Poland
clive URL: http://www.youtube.com/watch?v=XUjJWhlnujQ
FreeBSD Profiling, Kris Kennaway, MeetBSD 2008
Source: YouTube bsdconferences channel
Added: 06 December 2008
Tags: youtube, meetbsd, meetbsd2008, freebsd, profiling, kris kennaway
Flash (1:06:23)
FreeBSD Profiling tools, tips and tricks, Kris
Kennaway, MeetBSD 2008
clive URL: http://www.youtube.com/watch?v=Mfb5_uG7BCA
FreeBSD, Protecting Privacy with Tor
Source: YouTube bsdconferences channel
Added: 06 December 2008
Tags: youtube, meetbsd, meetbsd2007, freebsd, tor, privacy, christian bruffer
Flash (46:24)
"Protecting your Privacy with FreeBSD and Tor",
Christian Brffer at MeetBSD 2007 in Warsaw, Poland.
clive URL: http://www.youtube.com/watch?v=OwBh8ro7xHQ
FreeBSD, Building a Computing Cluster
Source: YouTube bsdconferences channel
Added: 06 December 2008
Tags: youtube, meetbsd, meetbsd2007, freebsd, cluster, performance, brooks davis
Flash (47:51)
"Reflections on Building a High-Performance Computing
Cluster using FreeBSD", Brooks Davis at MeetBSD
2007 in Warsaw, Poland.
clive URL: http://www.youtube.com/watch?v=BpsRb9fJ4Ds
Embedding FreeBSD, MeetBSD 2008
Source: YouTube bsdconferences channel
Added: 06 December 2008
Tags: youtube, meetbsd, meetbsd2008, embedded, freebsd, philip paeps, warner losh
Flash (38:56)
Embedding FreeBSD by Warner Losh and Philip Paeps,
MeetBSD November 15, 2008
clive URL: http://www.youtube.com/watch?v=Fc3xYrxvIU0
Lousy virtualization, Happy users: FreeBSD's jail(2) facility
Source: UKUUG
Added: 02 April 2007
Tags: ukuug, presentation, freebsd, jails, poul-henning kamp
Slides (2.7 Mb)
Lousy virtualization, Happy users: FreeBSD's jail(2) facility by Poul-Henning Kamp (phk@FreeBSD.org)
Richard Bejtlich - Network security monitoring using FreeBSD
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, freebsd, network security, monitoring, richard bejtlich
PDF (972 Kb, 23 pages)
I've been using FreeBSD as my preferred platform
for Network Security Monitoring (NSM) since 2000.
In this presentation I'll discuss my latest thinking
on using FreeBSD to identify normal, suspicious,
and malicious traffic in enterprise networks. FreeBSD
is a powerful platform for network traffic inspection
and log analysis, and I'll share a few ways I use
it in production environments.
Ken Caruso - Using BSD in Shmoocon labs
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, freebsd, scmoocon, ken caruso
PDF (447 Kb, 13 pages)
n/a
Brooks Davis - Isolating cluster jobs for performance and predictability
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, freebsd, clusters, brooks davis
PDF (952 Kb, 24 pages)
At The Aerospace Corporation, we run a large FreeBSD
based computing cluster to support engineering
applications. These applications come in all shapes,
sizes, and qualities of implementation. To support
them and our diverse userbase we have been searching
for ways to isolate jobs from one another in ways
that are more effective than Unix time sharing and
more fine grained than allocating whole nodes to
jobs. In this paper we discuss the problem space
and our efforts so far. These efforts include
implementation of partial file systems vitalization
and CPU isolation using CPU sets.
George Neville-Neil - Performance analysis with (hwpmc)
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, freebsd, hwpmc, george neville-neil
PDF (469 Kb, 71 pages)
FreeBSD has included support for Hardware Performance
Monitoring Counters (hwpmc) for several years now.
The hwpmc system provides access to counters that
are present in all modern Intel and AMD CPUs, as
well as other chipsets, and which give the programmer
the ability to understand the low level performance
issues that may effect their code. This talk will
cover the motivation behind and basic usage of
HWPMC.
EuroBSDCon 2008 - Paeps Philip - How-to embed FreeBSD
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, embed, freebsd, philip paeps
MP3 (1 byte, 43 minutes), OGG (1 byte, 43 minutes), PDF (1 byte, 17 pages)
This paper provides a how-to embed FreeBSD. A console
server built form an AT91RM9200 based ARM system
will be explored. This paper will talk about the
selection of hardware. It will explore creating
images for the target system, as well as concentrate
on different alternatives for deploying the system.
A number of different options exist today, and no
comprehensive guide for navigating through the
choices exists today. This paper will explore the
different alternatives that exist today for producing
images targeted at different size requirements. The
differing choices for storage in an embedded
environment are explored. The techniques used to
access rich debugging environments are discussed.
EuroBSDCon 2008 - George Neville-Neil - Multicast Performance in FreeBSD
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, multicast, freebsd, george neville-neil
MP3 (1 byte, 39 minutes), OGG (1 byte, 39 minutes), PDF (1 byte, n pages)
In the past ten years most of the research in network
protocols has gone into TCP, leaving UDP to languish
as a local configuration protocol. While the majority
of Internet traffic is TCP, UDP remains the only
IP protocol that works over multicast and as such
has some specific, and interesting uses in some
areas of computing. In 2008 we undertook a study
of the performance of UDP multicast on both 1Gbps
and 10Gbps Ethernet networks in order to see if
changing the physical layer of the network would
give a linear decrease in packet latency. To measure
the possible gains we developed a new network
protocol test program, mctest, which is capable of
recording packet round trip times from many hosts
simultaneously and which we believe accurately
represents how many environments use multicast. The
mctest program has been integrated into FreeBSD and
is now being used to verify the proper operation
of multicast on various pieces of 10Gbps hardware.
EuroBSDCon 2008 - Pedro Giffuni - Working with Engineering Applications in FreeBSD
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, freebsd, engineering applications, pedro giffuni
MP3 (1 byte, 51 minutes), OGG (1 byte, 51 minutes), PDF (1 byte, n pages)
In recent years, traditional branches of engineering
like Civil, Chemical, Mechanical, Electrical and
Industrial Engineering are requiring extensive
computing facilities for their needs. Several well
known labs (Sandia, Lawrence Livermore) rely on
huge clusters to do all types of complex analysis
that were unthinkable a couple of decades ago. While
the free BSD variants share the environment with
traditional UNIX systems, frequently used for such
computations, it was not common to find adequate
free software packages to carry complex calculations.
Eventually commercial versions of important math
related packages started to appear for the Linux
platform. Even when the big packages were distant,
the BSDs learned and adapted in resourceful ways:
Matlab and Mathematica, running under Linux emulation,
demanded functionality from the BSDs and NetBSD
implemented a signal trampoline to be able to run
AutoCAD with IRIX binary compatibility. A notable
project that was always available under a free
license was Berkeley's Spice circuit analysis
program, however it was an exception rather than
the rule. Even when the scientific community pressed
for a while to get other important tools like NASA's
FEA package Nastran under a free license, the
objective of being able to access and enhance open
scientific tools was elusive. About a decade ago
the situation started to improve: FreeBSD's ports
system started growing exponentially, first with a
high content in the math category, afterwards with
a CAD section and after sustained growth in those
categories a science section was created. This
growth was mostly pushed by Universities and their
research projects and in general are not well known
with respect to the commercial counterparts. I
started porting math/engineering code for FreeBSD
around 1996. Back then it was absolutely unthinkable
for a Mechanical Engineer to depend only on FreeBSD
for it's daily work. The situation nowadays is
different: there are some very high quality engineering
analysis packages like EDF's Code Aster, with more
than 12 years of professional development, that
just can't be ignored. A Finite Element package,
like Code Aster, can easily cost 5000 US$, is priced
according to the maximum problem size it can solve,
can require yearly licenses, and is rarely available
with source code. In NASTRAN's case the source code
is only available for US citizens under a yearly
fee. Free software does have serious limitations
though; just like in office applications there are
proprietary CAD formats or sometimes the package
simply doesn't have the required functionality.
Having the sources, of course, always has the
advantage of being able to implement (or pay for)
some specific functionality you might need. Many
commercial packages have been recently ported to
Linux, but even when they gain some of the advantages
of an open environment they still have yet another
limitation: they have been very slow to make use
of the multicored features of the new processors
in the market, a huge limitation now that the speed
war between processors has been limited by the
overheating problem. The objective of the talk is
to give an overview of several CAD/CAE packages
that have been made available recently as part of
FreeBSD's ports system and the decisions that were
made to port them. BRLCAD and Varkon are two CAD
utilities that made a transition from closed source
to an open environment and in the process in the
process of getting ported to BSD have gained greater
portability and general "bug" fixes critical for
their consolidation as usable and maintainable
projects. There are also some tricks that have not
been well documented: it is possible to enable
threads and some extra optimizations on some packages,
and it is also possible to replace the standard
BLAS library with the faster GOTO BLAS without
rebuilding the package. It is also possible to build
the packages optimized for a clustered environment,
but perhaps what is most interesting of all is how
all the packages interrelate with each other and
can turn FreeBSD into a complete enginering
environment. No OS distribution so far is offering
all the engineering specific utilities offered
through FreeBSD's ports system: from design to
visualization, passing through analysis FreeBSD is
becoming an option that can't be ignored, and best
of all, it is an effort that will benefit not only
FreeBSD but the wider audience.
Pedro F. Giffuni M. Sc. Industrial Engineering -
University of Pittsburgh Mechanical Engineer -
Universidad Nacional de Colombia I was born in
Bogota, Colombia but I am an Italian citizen. My
experience with computers started when I was about
12 years old With the TRS-80 Color Computer first
using Basic and the OS-9. I studied electronics for
3 years but became tired of worrying about "whatever
happened to electrons in there" and moved to
Mechanical Engineering. For a while I rested from
the computer world until the Internet came stepping
along. I started using FreeBSD around 1995 and soon
fell in love with the idea of being able to install
a complete version of UNIX from the net with just
one floppy. After submitting a the 999th port to
the FreeBSD project Walnut Creek was kind enough
to give me a subscription for several years to
FreeBSD's CD-ROM. Since then I've been on and off
porting software packages or fixing the bugs I have
caused while porting them. Of course there has
always been great respect for the other BSDs and
their wonderful license and while I've given up on
the idea of one day seeing a "UnifiedBSD" I am glad
to see different approaches sharing ideas in a
healthful environment.
Keywords: BSD, engineering, CAE, CAD, math, mechanical,
FreeBSD ports
EuroBSDCon 2008 - Ion-Mihai Tetcu - Improving FreeBSD ports/packages quality
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, freebsd, ports, packages, ion-mihai tetcu
MP3 (1 byte, 56 minutes), OGG (1 byte, 56 minutes), PDF (1 byte, n pages)
This talk is focused on ways to improve the quality
of FreeBSD's ports and packages and it's partially
based on the 5 months experience of writing and
running the consecutive versions of "QA Tindy".
Ion-Mihai "IOnut" Tetcu is a 28 years old FreeBSD
ports committer and maintains about 40 ports scattered
in the Ports Tree. He lives in Bucharest, Romania
where he runs and co-owns an IT& company and he's
a member of Romanian FreeBSD and FreeUnix User Group
(RoFUG). His non-IT interests include history,
philosophy and mountain climbing.
EuroBSDCon 2008 - Robert Watson - FreeBSD Network Stack Performance Optimizations for Modern Hardware
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, freebsd, network stack, hardware, robert watson
MP3 (1 byte, 53 minutes), OGG (1 byte, 53 minutes), PDF (1 byte, n pages)
The arrival of high CPU core density, with commodity
quad-core notebooks and 32-core servers, combined
with 10gbps networking have transformed network
design principles for operating systems. This talk
will describe changes in the FreeBSD 6.x, 7.x, and
forthcoming 8.x network stacks required to exploit
multiple cores and serve 10gbps networks. The goal
of the session will be to introduce the audience
to general strategies used to improve performance,
their rationales, and their impact on applications
and users:
- Introduction to the SMPng Project and the follow-on Netperf Project
- Workloads and performance measurement
- Efficient primitives to support modern network stacks
- Multi-core and cache-aware network memory allocator
- Fine-grained network stack locking
- Load-balancing and contention-avoidance across multiple CPUs
- CPU affinity for network stack data structures
- TCP performance enhancements including TSO, LRO, and TOE
- Zero-copy Berkely Packet Filter (BPF) buffers
- Direct network stack dispatch from interrupt handlers
- Multiple input and output queues
Robert Watson is a researcher at the University of
Cambridge Computer Laboratory investinging operating
system and network security. Prior to joining the
Computer Laboratory to work on a PhD, he was Senior
Principal Scientist at McAfee Research, now SPARTA
ISSO, a leading security research and development
organization, directing government and commercial
research contracts for customers that include DARPA,
the US Navy, and Apple Computer. His research
interests include operating system security, network
stack structure and performance, and windowing
system structure. He is also a member of the FreeBSD
Core Team and president of the FreeBSD Foundation.
EuroBSDCon 2008 - Paul Richards - eXtreme Programming: FreeBSD a case study
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, freebsd, extreme programming, paul richards
MP3 (1 byte, 54 minutes), OGG (1 byte, 54 minutes), PDF (1 byte, n pages)
Traditional project management methodologies are
typically based on the waterfall model where there
are distinct phases: requirements capture, design,
implementation, testing, delivery. Once a project
has moved on to the next phase there is no going
back. The end result is often a late project that
no-one wants anymore because the requirements have
fundamentally changed by the time the project is
delivered.
EuroBSDCon 2008 - Brooks Davis - Isolating cluster jobs for performance and predictability
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, freebsd, cluster, brooks davis
MP3 (1 byte, 51 minutes), OGG (1 byte, 51 minutes), PDF (1 byte, n pages)
The Aerospace Corporation operates a federally
funded research and development center in support
of national-security, civil and commercial space
programs. Many of our 2400+ engineers use a variety
of computing technologies to support their work.
Applications range from small models which are
easily handled by desktops to parameter studies
involving thousands of cpu hours and traditional,
large scale parallel codes such as computational
fluid dynamics and molecular modeling applications.
Our primary resources used to support these large
applications are computing clusters. Our current
primary cluster, the Fellowship cluster consists
of 352 dual-processor nodes with a total of 14xx
cores. Two additional clusters, beginning at 150
dual-processor nodes each are being constructed to
augment Fellowship. As in In any multiuser computing
environment with limited resources, user competition
for resources is a significant burden. Users want
everything they need to do their job, right now.
Unfortunately, other users may need those resources
at the same time. Thus, systems to arbitrate this
resource contention are necessary. On Fellowship
we have deployed the Sun Grid Engine scheduler which
scheduled batch jobs across the nodes. In the next
section we discuss the performance problems that
can occur when sharing resources in a high performance
computing cluster. We then discuss range of
possibilities to address these problems. We then
explain the solutions we are investigating and
describe our experiments with them. We then conclude
with a discussion of future work.
EuroBSDCon 2008 - Russel Sutherland - UTORvpn: A BSD based VPN service for the masses
Source: EuroBSDCon
Added: 22 October 2008
Tags: eurobsdcon, eurobsdcon2008, freebsd, vpn, russel sutherland
MP3 (1 byte, 52 minutes), OGG (1 byte, 52 minutes), PDF (1 byte, n pages)
The University of Toronto is a large educational
institutional with over 70,000 students and 10,000
staff and faculty. For the past three years, we
have developed and implemented a ubiquitous VPN
service, based up on OpenVPN and FreeBSD. The service
has over 3000 active customers, with up to 35
simultaneous users. The system supports, Linux, Mac
OS X and Windows XP/Vista/2000 clients. Tools have
been developed to create a central CA which enables
users to log in to a secure server and get their
customized client, certificates and configuration.
The NSIS installer is used to generate the customized
windows installers. Similar packages are generated
for the various Unix based clients. Additional
WWW/PHP based tools, have been developed to monitor
and log usage of the service, using standard graphs,
alarms for excessive use and a certificate revocation
mechanism. The system has been integrated into the
local identity management system (Kerberos/LDAP)
in order to authorize and authenticate users upon
initiation and per session usage. All code is Open
Source and freely available.
EuroBSDCon 2007 Videos
Source: EuroBSDCon
Added: 10 October 2007
Tags: eurobsdcon, eurobsdcon2007, videos
Soren Straarup - An ARM from shoulder to hand (141 Mb), Pawel Jakub - FreeBSD/ZFS - last word in operating/file systems (203 Mb), Yvan VanHullebus - NETASQ and BSD: a success story (382 Mb), Claudio Jeker - Routing on OpenBSD (394 Mb), Brooks Davis - Using FreeBSD to Promote Open Source Development Methods (92 Mb), Gregers Petersen - Open Source - is it something new? (285 Mb), Antti Kantee - ReFUSE: Userspace FUSE Reimplementation Using puffs (197 Mb), Steven Murdoch - Hot or Not: Fingerprinting hosts through clock skew (235 Mb), Sam Smith - Fighting "Technical fires" (147 Mb), Kirk Mckusick - A Brief History of the BSD Fast Filesystem (251 Mb), George Neville-Neil - Network Protocol Testing in FreeBSD and in General (271 Kb), Robert Watson - FreeBSD Advanced Security Features (200 Mb), Sam Leffler - Long Distance Wireless (for Emerging Regions) (248 Mb), Simon L Nielsen - The FreeBSD Security Officer function (195 Kb), Stephen Borrill - Building products with NetBSD - thin-clients (364 Mb), Pierre Yves Ritschard - Load Balancing (219 Mb), Isaac Levy - FreeBSD jail(8) Overview, the Secure Virtual Server (350 Mb), Ryan Bickhart - Transparent TCP-to-SCTP Translation Shim Layer (376 Mb), John P Hartmann - Real Men's Pipes - When UNIX meets the mainframe mindset (315 Mb)
EuroBSDCon 2007 Papers
EuroBSDCon 2007 Papers
Source: EuroBSDCon
Added: 05 October 2007
Tags: eurobsdcon, eurobsdcon2007, papers
Pawel Jakub - FreeBSD/ZFS - last word in operating/file systems (337 Kb), Stephen Borrill - Building products with NetBSD - thin-clients (407 Kb), John P Hartmann - CMS Pipelines Explained (118 Kb), Soren Straarup - An ARM from shoulder to hand (307 Kb), Brooks Davis - Building clusters with FreeBSD (2.2 Mb), Steven Murdoch - Hot or Not: Fingerprinting hosts through clock skew (6.1 Mb), Brooks Davis - Using FreeBSD to Promote Open Source Development Methods (989 Kb), Sam Leffler - Long Distance Wireless (for Emerging Regions) (19 Mb), Antti Kantee - ReFUSE: Userspace FUSE Reimplementation Using puffs (102 Kb), Yvan VanHullebus - NETASQ and BSD: a success story (2.4 Mb), Ryan Bickhart - Transparent TCP-to-SCTP Translation Shim Layer (692 Kb), Pierre Yves Ritschard - Load Balancing (23 Kb), John P Hartmann - Real Men's Pipes - When UNIX meets the mainframe mindset (382 Kb), Claudio Jeker - Routing on OpenBSD (1.3 Mb), Marc Balmer - Supporting Radio Clocks in OpenBSD (304 Kb), Peter Hansteen - Firewalling with OpenBSD's PF packet filter (531 Kb), Simon L Nielsen - The FreeBSD Security Officer function (251 Kb), Robert Watson - FreeBSD Advanced Security Features (152 Kb), Ryan Bickhart - Transparent TCP-to-SCTP Translation Shim Layer (491 Kb), Kirk Mckusick - A Brief History of the BSD Fast Filesystem (145 Kb), George Neville-Neil - Network Protocol Testing in FreeBSD and in General (251 Kb), Sam Smith - Fighting "Technical fires" (1.4 Mb), Marko Zec - Network stack virtualization for FreeBSD 7.0 (401 Kb), Isaac Levy - FreeBSD jail(8) Overview, the Secure Virtual Server (120 Mb)
EuroBSDCon 2007 Papers
Andre Opperman - The papers I write for EuroBSDCon 05
Source: EuroBSDCon
Added: 14 January 2007
Tags: eurobsdcon, eurobsdcon2005, paper, freebsd, networking, andre opperman
Optimizing the FreeBSD IP and TCP Stack (1 Mb), New Networking Features in FreeBSD 6 (92 Kb)
The papers I write for EuroBSDCon 05 on New Networking
Feature in FreeBSD 6.0 and Optimizing FreeBSD IP
and TCP in 7-CURRENT
The presentation I gave at SUCON 04
(115 Kb) Source: Andre Opperman
Added: 14 January 2007
Tags: sucon, presentation, freebsd, networking, andre opperman
The presentation I gave at SUCON 04 on 2nd September
2004 about enhancements/changes in FreeBSD 5.3
Networking Stack.
AsiaBSDCon 2009 Paper List
Source: AsiaBSDCon
Added: 24 May 2009
Tags: asiabsdcon, asiabsdcon2009
FreeBSD and SOI-Asia Project Mohamad by Dikshie Fauzie (753 Kb, 4 pages), Deprecating groff for BSD manual display by Kristaps Dzonsons (114 Kb, 8 pages), FreeBSD on high performance multi-core embedded PowerPC systems - Rafal Jaworowski (359 Kb, 12 pages), An Overview of FreeBSD/mips by M. Warner Losh (67 Kb, 8 pages), Active-Active Firewall Cluster Support in OpenBSD by David Gwynne (154 Kb, 20 pages), Mail system for distributed network by Andrey Zakharchenko (150 Kb, 3 pages), OpenBGPD - Bringing full views to OpenBSD since by 2004 Claudio Jeker (401 Kb, 6 pages), Environmental Independence: BSD Kernel TCP/IP in Userspace by Antti Kantee (213 Kb, 10 pages), Crypto Acceleration on FreeBSD by Philip Paeps (58 Kb, 3 pages), Isolating Cluster Users (and Their Jobs) for Performance and Predictability by Brooks Davis (662 Kb, 7 pages), PC-BSD - Making FreeBSD on the Desktop a reality by Kris Moore (351 Kb, 9 pages), The Locking Infrastructure in the FreeBSD kernel by Attilio Rao (55 Kb, 7 pages), OpenBSD Hardware Sensors Framework by Constantine A. Murenin (245 Kb, 14 pages)
Papers of the AsiaBSDCon 2009
AsiaBSDCon 2008 Paper List
Source: AsiaBSDCon
Added: 08 April 2008
Tags: asiabsdcon, asiabsdcon2008
Using FreeBSD to Promote Open Source Development Methods, Brooks Davis, Michael AuYeung, Mark Thomas (The Aerospace Corporation) (483 Kb), OpenBSD Network Stack Internals, Claudio Jeker (The OpenBSD Project) (410 Kb), Tracking FreeBSD in a Commercial Setting, M. Warner Losh (Cisco Systems, Inc.) (94 Kb), Send and Receive of File System Protocols: Userspace Approach With puffs, Antti Kantee (Helsinki University of Technology, Finland) (126 Kb), GEOM --- in Infrastructure We Trust, Pawel Jakub Dawidek (The FreeBSD Project) (91 Kb), Reducing Lock Contention in a Multi-Core System, Randall Stewart (Cisco Systems, Inc.) (72 Kb), PC-BSD: FreeBSD on the Desktop, Matt Olander (iXsystems) (6.4 Mb), Logical Resource Isolation in the NetBSD Kernel, Kristaps Dzonsons (Centre for Parallel Computing, Swedish Royal Institute of Technology) (97 Kb), Whole of the proceedings (9.3 Mb), Gaols: Implementing Jails Under the kauth Framework, Christoph Badura (The NetBSD Foundation) (92 Kb), Cover page (467 Kb), Sleeping Beauty --- NetBSD on Modern Laptops, Jorg Sonnenberger, Jared D. McNeill (The NetBSD Foundation) (87 Kb), A Portable iSCSI Initiator, Alistair Crooks (The NetBSD Foundation) (341 Kb), BSD implementations of XCAST6, Yuji IMAI, Takahiro KUROSAWA, Koichi SUZUKI, Eiichi MURAMOTO, Katsuomi HAMAJIMA, Hajimu UMEMOTO, and Nobuo KAWAGUTI (XCAST fan club, Japan) (526 Kb)
Papers of the AsiaBSDCon 2007
AsiaBSDCon 2007 Paper/Slides List
Source: AsiaBSDCon
Added: 17 March 2007
Tags: asiabsdcon, asiabsdcon2007
SHISA: The Mobile IPv6/NEMO BS Stack Implementation Current Status, Keiichi Shima (Internet Initiative Japan Inc., Japan), Koshiro Mitsuya, Ryuji Wakikawa (Keio University, Japan), Tsuyoshi Momose (NEC Corporation, Japan), Keisuke Uehara (Keio University, Japan) [paper] (311 Kb), An ISP Perspective, jail(8) Virtual Private Servers, Isaac Levy (NYC*BUG/LESMUUG, USA) [paper] (140 Kb), A NetBSD-based IPv6 NEMO Mobile Router, Jean Lorchat, Koshiro Mitsuya, Romain Kuntz (Keio University, Japan) [paper] (412 Kb), Whole of the Proceedings (6.5 Mb), Cover page (588 Kb), Porting the ZFS File System to the FreeBSD Operating System, Pawel Jakub Dawidek (pjd at FreeBSD.org, Poland) [slides] (278 Kb), Implementation and Evaluation of the Dual Stack Mobile IPv6, Koshiro Mitsuya, Ryuji Wakikawa, Jun Murai (Keio University, Japan) [paper] (1071 Kb), puffs - Pass to Userspace Framework File System, Antti Kantee (Helsinki University of Technology, Finland) [slides] (116 Kb), Reflections on Building a High Performance Computing Cluster Using FreeBSD, Brooks Davis (The Aerospace Corporation/brooks at FreeBSD.org, USA) [paper] (1371 Kb), Nsswitch Development: Nss-modules and libc Separation and Caching, Michael A Bushkov (Southern Federal University/bushman at FreeBSD.org, Russia) [paper] (32 Kb), Bluffs: BSD Logging Updated Fast File System, Stephan Uphoff (Yahoo!, Inc./ups at FreeBSD.org, USA) [slides] (601 Kb), Security Measures in OpenSSH, Damien Miller (djm at openbsd.org, Australia) [paper] (97 Kb), Porting the ZFS File System to the FreeBSD Operating System, Pawel Jakub Dawidek (pjd at FreeBSD.org, Poland) [paper] (96 Kb), An ISP Perspective, jail(8) Virtual Private Servers, Isaac Levy (NYC*BUG/LESMUUG, USA) [slides] (20 Mb), Support for Radio Clocks in OpenBSD, Marc Balmer (mbalmer at openbsd.org, Switzerland) [paper] (86 Kb), How the FreeBSD Project Works, Robert N M Watson (University of Cambridge/rwatson at FreeBSD.org, United Kingdom) [paper] (328 Kb), puffs - Pass to Userspace Framework File System, Antti Kantee (Helsinki University of Technology, Finland) [paper] (68 Kb)
Slides and papers of the AsiaBSDCon 2007
Robert Watson's Slides from EuroBSDCon 2004
Source: Robert Watson
Added: 14 January 2007
Tags: eurobsdcon, eurobsdcon2004, slides, trustedbsd, freebsd, mac, robert watson
TrustedBSD MAC Framework on FreeBSD and Darwin (270 Kb)
Robert Watson will describe the design and application
of the TrustedBSD MAC Framework, a flexible kernel
security framework developed on FreeBSD, and recently
experimentally ported to Apple's Darwin operating
system. The MAC Framework permits loadable access
control kernel modules to be loaded, modifying the
security behavior of the operating system, including
SEBSD, a port of the SELinux FLASK/TE security model
to FreeBSD.
Robert Watson's Slides from UKUUG LISA 2006
Source: Robert Watson
Added: 14 January 2007
Tags: ukuug, slides, openbsm, trustedbsd, freebsd, robert watson
CAPP-Compliant Security Event Audit System for Mac OS X and FreeBSD (UKUUG LISA 2006). (199 Kb)
UKUUG LISA 2006 took place in Durham, UK in March,
2006. On this page, you can find my slides from
this conference.
OpenBSM is a BSD-licensed implementation of Sun's
Basic Security Module (BSM) API and file format,
and is the foundation of the TrustedBSD audit
implementation for FreeBSD. This talk will cover
the requirements, design, and implementation of
audit support for FreeBSD. Security audit support
provides detailed logging of security-relevant
events, and meets the requirements of the CAPP
Common Criteria protection profile.
Robert Watson's Slides from EuroBSDCon 2006 and FreeBSD Developer Summit
Source: Robert Watson
Added: 14 January 2007
Tags: eurobsdcon, eurobsdcon2006, robert watson
How the FreeBSD Project Works (EuroBSDCon 2006 Full Conference) (4.4 Mb), TrustedBSD presentation on Audit and priv(9) (Developer Summit) (166 Kb)
EuroBSDCon 2006 took place in Milan, Italy, and not
only offered excellent food on a flexible schedule,
but also an interesting array of talks on work
spanning the BSD's. On this page, you can find my
slides from the FreeBSD developer summit and full
conference.
Status report on the TrustedBSD Project: introduction
and status regarding Audit, plus a TODO list;
introduction to the priv(9) work recently merged
to 7.x.
The FreeBSD Project is one of the oldest and most
successful open source operating system projects,
seeing wide deployment across the IT industry. From
the root name servers, to top tier ISPs, to core
router operating systems, to firewalls, to embedded
appliances, you can't use a networked computer for
ten minutes without using FreeBSD dozens of times.
Part of FreeBSD's reputation for quality and
reliability comes from the nature of its development
organization--driven by a hundreds of highly skilled
volunteers, from high school students to university
professors. And unlike most open source projects,
the FreeBSD Project has developers who have been
working on the same source base for over twenty
years. But how does this organization work? Who
pays the bandwidth bills, runs the web servers,
writes the documentation, writes the code, and calls
the shots? And how can developers in a dozen time
zones reach agreement on the time of day, let alone
a kernel architecture? This presentation will attempt
to provide, in 45 minutes, a brief if entertaining
snapshot into what makes FreeBSD run.
Robert Watson's Slides from BSDCan 2006 and FreeBSD Developer Summit
Source: Robert Watson
Added: 14 January 2007
Tags: bsdcan, bsdcan2006, notes, devsummit, robert watson
SMPng Network Stack Update (Developer Summit) (91 Kb), How the FreeBSD Project Works (BSDCan 2006 Full Conference) (4.4 Mb Kb), Notes from the 10 May 2006 Meeting of the Network Stack Cabal (Developer Summit) (72 Kb), TrustedBSD Project Update (Developer Summit) (120 Kb)
As usual, Dan Langille ran an excellent BSDCan conference.
On this page, you can find my slides from the
developer summit and full conference, excluding the
contents of the WIPs, for which I don't have
permission to redistribute the slides.
Robert Watson's Slides from EuroBSDCon 2005
Source: Robert Watson
Added: 14 January 2007
Tags: eurobsdcon, eurobsdcon2005, slides, freebsd, smp, robert watson, poul-henning kamp, ed maste
Introduction to Multithreading and Multiprocessing in the FreeBSD SMPng Network Stack (370 Kb)
EuroBSDCon 2005 took place in Basel, Switzerland
in November, 2005. Due to an injury, I was unable
to attend the conference itself, and my talks were
presented in absentia by Poul-Henning Kamp and Ed
Maste, who have my greatest appreciation!
The FreeBSD SMPng Project has spent the past five
years redesigning and reimplementing SMP support
for the FreeBSD operating system, moving from a
Giant-locked kernel to a fine-grained locking
implementation with greater kernel threading and
parallelism. This paper introduces the FreeBSD SMPng
Project, its architectural goals and implementation
approach. It then explores the impact of SMPng on
the FreeBSD network stack, including strategies for
integrating SMP support into the network stack,
locking approaches, optimizations, and challenges.
Robert Watson's Slides from BSDCan 2004
Source: Robert Watson
Added: 14 January 2007
Tags: bsdcan, bsdcan2004, slides, trustedbsd, freebsd, robert watson
TrustedBSD: Trusted Operating System Features for BSD (277 Kb)
BSDCan 2004 took place at the University of Ottawa
in Ottawa, Canada. On this page, you can find my
slides from the conference.
Robert Watson will describe a variety of pieces of
work done as part of the TrustedBSD Project, including
the TrustedBSD MAC Framework, Audit facilities for
FreeBSD, as well as supporting infrastructure work
such as GEOM/GBDE, UFS2, OpenPAM. He will also
discuss how certification and evaluation play into
feature selection, design, and documentation.
Robert Watson's Slides from AsiaBSDCon 2004
Source: Robert Watson
Added: 14 January 2007
Tags: asiabsdcon, asiabsdcon2004, robert watson
AsiaBSDCon 2004 BSD (FreeBSD) BoF session (1.4 Mb), Extensible Kernel Security through the TrustedBSD MAC Framework. (135 Kb)
AsiaBSDCon 2004 took place in Taipei, Taiwan, in March 2004, and was hosted by Academia Sinica.
A Tale of Four Kernels
Source: Diomidis Spinellis
Added: 17 May 2008
Tags: freebsd, linux, solaris, windows, article, kernel, diomidis spinellis
Diomidis Spinellis. A tale of four kernels.
In Wilhem Schfer, Matthew B. Dwyer, and
Volker Gruhn, editors, ICSE '08: Proceedings
of the 30th International Conference on
Software Engineering, pages 381-390, New
York, May 2008. Association for Computing
Machinery.
,
Diomidis Spinellis. A tale of four kernels.
In Wilhem Schfer, Matthew B. Dwyer, and
Volker Gruhn, editors, ICSE '08: Proceedings
of the 30th International Conference on
Software Engineering, pages 381-390, New
York, May 2008. Association for Computing
Machinery.
The FreeBSD, GNU/Linux, Solaris, and Windows operating
systems have kernels that provide comparable
facilities. Interestingly, their code bases share
almost no common parts, while their development
processes vary dramatically. We analyze the source
code of the four systems by collecting metrics in
the areas of file organization, code structure,
code style, the use of the C preprocessor, and data
organization. The aggregate results indicate that
across various areas and many different metrics,
four systems developed using wildly different
processes score comparably. This allows us to posit
that the structure and internal quality attributes
of a working, non-trivial software artifact will
represent first and foremost the engineering
requirements of its construction, with the influence
of process being marginal, if any.
Global software development in the FreeBSD project
Source: Diomidis Spinellis
Added: 24 January 2007
Tags: freebsd, article, global software development, domidis spinellis
In NASSCOM Quality Summit 2006: Setting benchmarks in global outsourcing, Bangalore, India, September 2006. National Association of Software and Services Companies (NASSCOM)., International Workshop on Global Software Development for the Practitioner, pages 73-79. ACM Press, May 2006, Linux Format, (11):60?63, September/October 2006. In Greek.
FreeBSD is a sophisticated operating system developed
and maintained as open-source software by a team
of more than 350 individuals located throughout the
world. This study uses developer location data, the
configuration management repository, and records
from the issue database to examine the extent of
global development and its effect on productivity,
quality, and developer cooperation. The key findings
are that global development allows round-the-clock
work, but there are some marked differences between
the type of work performed at different regions.
The effects of multiple dispersed developers on the
quality of code and productivity are negligible.
Mentoring appears to be sometimes associated with
developers living closer together, but ad-hoc
cooperation seems to work fine across continents.
New York City BSD Con 2008
Source: New York City *BSD User Group
Added: 24 November 2008
Tags: nycbsdcon2008, nycbsdcon, presentation
Julio M. Merino Vidal: An introduction to the Automated Testing Framework (ATF) for NetBSD. (570 Kb, 18 pages), Mike Silbersack: Detecting TCP regressions with tcpdiff. (88 Kb, 28 pages), Metthew Dillon: The HAMMER File System. (820 Kb, 16 pages), Kurt Miller: OpenBSD's Position Independent Executables (PIE) Implementation. (21 pages), Adrian Chadd: High-throughput concurrent disk IO in FreeBSD. (197 Kb, 92 pages), Anders Magnusson: Design and Implementation of the Portable C Compiler. (123 Kb, 29 pages), Jason L Wright: When Hardware Is Wrong, or "They can Fix It In Software". (1.7 Mb, 22 pages)
Slides of presentations given at New York City BSD
Conference 2008.
New York City BSD Con 2008
Source: New York City *BSD User Group
Added: 13 October 2008
Tags: nycbsdcon2008, nycbsdcon, presentation
Jeremy C. Reed: Introduction to DNSSEC. (15 Mb), Michael Lucas: Network Refactoring, or doing an oil change at 80 MPH. (10 Mb), Anders Magnusson: Design and Implementation of the Portable C Compiler. (15 Mb), Jason Dixon: BSD versus GPL. (4 Mb), Kurt Miller: OpenBSD's Position Independent Executables (PIE) Implementation. (10 Mb), Metthew Dillon: The HAMMER File System. (14 Mb), Pawel Jakub Dawidek: A closer look at the ZFS file system. (16 Mb), Jason L Wright: When Hardware Is Wrong, or "They can Fix It In Software". (9 Mb), Michael Shalayeff: Porting PCC. (11 Mb), Adrian Chadd: High-throughput concurrent disk IO in FreeBSD. (14 Mb), Mike Silbersack: Detecting TCP regressions with tcpdiff. (11 Mb), Julio M. Merino Vidal: An introduction to the Automated Testing Framework (ATF) for NetBSD. (10 Mb)
Audio recordings of presentations given at New York
City BSD Conference 2008. Courtesy of nikolai at
fetissov.org. The main page also has links to the
slides.
Building a High-Performance Computing Cluster Using FreeBSD
Source: New York City *BSD User Group
Added: 22 March 2008
Tags: nycbug, presentation, high performance computing, freebsd, brooks davis
MP3 version (9 Mb, 80 minutes)
Special NYC*BUG meeting with FreeBSD developer Brooks Davis
Since late 2000 we have developed and maintained a
general purpose technical and scientific computing
cluster running the FreeBSD operating system. In
that time we have grown from a cluster of 8 dual
Intel Pentium III systems to our current mix of 64
dual, quad-core Intel Xeon and 289 dual AMD Opteron
systems.
In this talk we reflect on the system architecture
as documented in our BSDCon 2003 paper "Building a
High-performance Computing Cluster Using FreeBSD"
and our changes since that time. After a brief
overview of the current cluster we revisit the
architectural decisions in that paper and reflect
on their long term success. We then discuss lessons
learned in the process. Finally, we conclude with
thoughts on future cluster expansion and designs.
Bio
Brooks Davis is an Engineering Specialist in the
High Performance Computing Section of the Computer
Systems Research Department at The Aerospace
Corporation. He has been a FreeBSD user since 1994,
a FreeBSD committer since 2001, and a core team
member since 2006. He earned a Bachelors Degree in
Computer Science from Harvey Mudd College in 1998.
His computing interests include high performance
computing, networking, security, mobility, and, of
course, finding ways to use FreeBSD in all these
areas. When not computing, he enjoys reading,
cooking, brewing and pounding on red-hot iron in
his garage blacksmith shop.
New York City BSD Con 2006
Source: New York City *BSD User Group
Added: 01 November 2006
Tags: nycbug, nycbsdcon, nycbsdcon2006, presentation
Russell Sutherland: BSD on the Edge of the Enterprise. (12 Mb), Bob Beck: spamd - spam deferral daemon. (16 Mb), Bjorn Nelson: A Build System for FreeBSD (9 Mb), Jason Dixon: BSD Is Dying. (5 Mb), Kristaps Johnson: BSD Virtualisation with sysjail. (15 Mb), Bob Beck: PF, it is not just for firewalls anymore. (15 Mb), Jason Wright: OpenBSD on sparc64. (9 Mb), Brian A. Seklecki: A Framework for NetBSD Network Appliances. (10 Mb), Johnny C. Lam: The "hidden dependency" problem. (13 Mb), Corey Benninger: Security with Ruby on Rails in BSD (14 Mb), Wietse Venema: Postfix as a Secure Programming Example. (16 Mb), Marco Peereboom: Bio & Sensors in OpenBSD. (11 Mb)
Audio recordings of presentations given at New York
City BSD Conference 2006. Courtesy of nikolai at
fetissov.org. The main page also has links to the
slides.
Nate Lawson on ACPI
(245 Mb) Source: Bay Area FreeBSD Users Group
Added: 09 September 2006
Tags: bafug, presentation, freebsd, acpi, nate lawson
Our Topic:
FreeBSD's ACPI implementation: The details.
Our Speaker:
Nate Lawson, FreeBSD Committer.
Our Topic:
FreeBSD's ACPI implementation is based on code for ACPI released
by Intel. Nate and others wrote the glue code to make this code
work on FreeBSD. He explains how this was done, and why.
Network Protocol Development Tools and Techniques for FreeBSD
(211 Mb) Source: Bay Area FreeBSD Users Group
Added: 10 August 2006
Tags: bafug, presentation, freebsd, packet construction set, george neville-neil
Our Topic:
Network Protocol Development Tools and Techniques for FreeBSD
Our Speaker:
George Neville-Neil, co-author of the "Design and
Implementation of the FreeBSD Operating System"
"daemon" book.
Our Topic:
While computers have gotten faster and more powerful
the tools we use to develop network protocols, such
as TCP, UDP, IPv4 and IPv6 have not. Most network
protocols are developed, in C, in the kernel, and
require a lot of work to test. Over the past year
or so I have been working with virtual machines, a
couple of pieces of open source software, and begun
developing a library for use in protocol testing.
This talk will cover three topics:
- Developing and testing kernel code with Virtual Machines
- Finding good tests for networking code
- Packet Construction Set (PCS) a new library for
writing protocol tests
MeetBSD 2008 in California - Presentation
Source: MeetBSD
Added: 19 November 2008
Tags: meetbsd, meetbsd2008, freebsd, presentations
FreeBSD Foundation Update & Recognition by Robert Watson (3.2 Mb, 8 pages), BSD Certification by Dru Lavigne (80 Kb, 19 pages), Crypto Acceleration by Philip Paeps (256 Kb, 20 pages), "Help, my system is slow!" Profiling tools, tips and tricks by Kris Kennaway (172 Kb, 29 pages), Embedding FreeBSD by M. Warner Losh (685 Kb, 31 pages), Isilon and FreeBSD by Zach Loafman (136 Kb, 25 pages), Isolating Cluster Jobs for Performance and Predictability by Brooks Davis (900 Kb, 24 pages), PC-BSD 7 - A Developer's Perspective by Kris Moore (580 Kb, 45 pages), FreeBSD Network Stack Performance - Optimizations for Modern Hardware by Robert Watson (5.5 Mb, 43 pages), A closer look at the ZFS file system by Pawel Jakub Dawidek (470 Kb, 45 pages)
MeetBSD 2008 at the Googleplex in Mountain View,
California to celebrate FreeBSD's 15th Anniversary!
MeetBSD 2007 - Presentations and recordings
Source: MeetBSD
Added: 28 May 2008
Tags: meetbsd, meetbsd2007
Slawomir Zak - DTrace - Monitoring i strojenie systemu w XXI wieku (546 Mb), Brooks Davis - Reflections on Building a High-Performance Computing Cluster Using FreeBSD (401 Mb), Christian Brüffer - Protecting your Privacy with FreeBSD and Tor (416 Kb, 34 Pages), Rafal Jaworowski - FreeBSD do zabudowy, czyli nie tylko pecety (600 Kb, 21 pages), Dominik Hamera, Jakub Klausa - Nowoczesne rozwiazania bezprzewodowe w systemie FreeBSD (165 Mb), Christian Brüffer - Protecting your Privacy with FreeBSD and Tor (409 Kb), Matt Olander - PC-BSD: FreeBSD on the Desktop (272 Mb), Adam Bartman, Rafal Grzebyk - Nowoczesna infrastruktura telefoniczna w oparciu o systemy z rodziny BSD (105 Mb), Pawel Solyga - Meet BSD projects from Google Summer of Code 2007 (6.0 Mb), Brooks Davis - Reflections on Building a High-Performance Computing Cluster Using FreeBSD (1.7 Mb, 25 Pages), Rafal Jaworowski - FreeBSD do zabudowy, czyli nie tylko pecety (638 Mb), Philip Paeps - Detangling and debugging: friends in unexpected places (162 Mb), Pawel Solyga - Meet BSD projects from Google Summer of Code 2007 (3.7 Mb, 71 Pages), Pawel Solyga - Meet BSD projects from Google Summer of Code 2007 (308 Mb), Adam Bartman, Rafal Grzebyk - Nowoczesna infrastruktura telefoniczna w oparciu o systemy z rodziny BSD (3.9 Mb, 71 Pages), Philip Paeps - Detangling and debugging: friends in unexpected places (495 Kb, 53 Pages), Kris Kennaway - New features and improvements in FreeBSD 7 (336 Kb, 37 pages), Slawomir Zak - DTrace - Monitoring i strojenie systemu w XXI wieku (1.1 Mb, 35 Pages), Kris Kennaway - New features and improvements in FreeBSD 7 (564 Mb)
MeetBSD 2007 at the Conference Centre-PWSBiA Congress in Warsaw
Manuel Trujillo - FreeBSD para usuarios de GNU/Linux
(32 Kb) Source: BSDCon Spain
Added: 27 May 2008
Tags: bsdcon-barcelona, spanish, presentation, freebsd, linux, manuel trujillo
Charla sobre las diferencias que puede encontrar un usuario
de un sistema operativo GNU/Linux cuando accede a un sistema
operativo FreeBSD, y sugerencias superar la posible
desorientación.
Jesús Rodriguez - SIP y VozIP con FreeBSD
(527 Kb, 40 pages) Source: BSDCon Spain
Added: 27 May 2008
Tags: bsdcon-barcelona, spanish, presentation, asterisk, openser, freebsd, sip, voip, jesus rodriguez
Repaso a las diferentes aplicaciones y servicios
relacionados con SIP y VozIP que pueden usarse en
FreeBSD. Entre estas apliaciones destacan OpenSER y
Asterisk, ya que usados de forma conjunta pueden ofrecer
una larga lista de servicios de forma rápida,
segura y escalable.
COMPLETE Hard Disk Encryption with FreeBSD
Source: 22nd Chaos Communication Congress
Added: 23 August 2006
Tags: ccc, ccc2005, ccc22, presentation, freebsd, harddisk encryption, marc schiesser
Google Video (1:06:07), Slides (679Kb), Bittorrent link (37Kb)
COMPLETE Hard Disk Encryption with FreeBSD, by Marc Schiesser
Learn how to effectively protect not only your data
but also your applications.
Most technologies and techniques intended for
securing digital data focus on protection while the
machine is turned on mostly by defending against
remote attacks. An attacker with physical access
to the machine, however, can easily circumvent these
defenses by reading out the contents of the storage
medium on a different, fully accessible system or
even compromise program code on it in order to leak
encrypted information. Especially for mobile users,
that threat is real. And for those carrying around
sensitive data, the risk is most likely high. This
talk will introduce a method of mitigating that
particular risk by protecting not only the data
through encryption, but also the applications and
the operating system from being compromised while
the machine is turned off.
FreeBSD Security Officer funktionen
Source: AArhus Unix Users Group
Added: 15 January 2007
Tags: h, freebsd, security officer, simon l nielsen
PDF (danish) (211 Kb)
"FreeBSD Security Officer funktionen" at the AAUUG,
AAUUG, 22 August 2006 by Simon L. Nielsen (FreeBSD
Deputy Security Officer)
FreeBSD Security Officer funktionen
(210 Kb) Source: BSD UNIX bruger gruppe i Danmark
Added: 15 January 2007
Tags: aauug, presentation, danish, freebsd, security officer, simon l nielsen
"FreeBSD Security Officer funktionen" at the BSD-DK,
26 August 2006 by Simon L. Nielsen (FreeBSD Deputy
Security Officer)
Google Tech Talks June 20, 2007: How the FreeBSD Project Works
Source: Google Tech Talks
Added: 04 July 2007
Tags: google, presentation, freebsd, freebsd project, robert watson
AVI (321 Mb, 51 minutes)
The FreeBSD Project is one of the oldest and most
successful open source operating system ... all
projects, seeing wide deployment across the IT
industry. From the root name servers, to top tier
ISPs, to core router operating systems, to firewalls,
to embedded appliances, you can't use a networked
computer for ten minutes without using FreeBSD
dozens of times. Part of FreeBSD's reputation for
quality and reliability comes from the nature of
its development organization--driven by a hundreds
of highly skilled volunteers, from high school
students to university professors. And unlike most
open source projects, the FreeBSD Project has
developers who have been working on the same source
base for over twenty years. But how does this
organization work? Who pays the bandwidth bills,
runs the web servers, writes the documentation,
writes the code, and calls the shots? And how can
developers in a dozen time zones reach agreement
on the time of day, let alone a kernel architecture?
This presentation will attempt to provide, in 45
minutes, a brief if entertaining snapshot into
what makes FreeBSD run.
Speaker: Robert Watson Robert Watson is a researcher
at the University of Cambridge Computer Laboratory
investinging operating system and network security.
Prior to joining the Computer Laboratory to work
on a PhD, he was a Senior Principal Scientist at
McAfee Research, now SPARTA ISSO, a leading security
research and development organization, where he
directed government and commercial research contracts
for customers that include DARPA, the US Navy, and
Apple Computer. His research interests include
operating system security, network stack structure
and performance, and windowing system structure.
He is also a member of the FreeBSD Core Team and
president of the FreeBSD Foundation.
OpenFest 2005 Videos
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2005, presentation
Offical Bulgarian FreeBSD Mirror - Dimiter Vasilev (411 Mb), Embedding BSD - Ivo Vachkov (345 Mb), Route and firewall redundancy using CARP and pfsync - Atanas Bachvarov (153 Mb), FreeBSD Jails - Deyan Dyankov (13 Mb), QoS etc with OpenBSD pf (501 Mb), DIY FreeBSD Port (326 Mb)
Various videos of OpenFest 2005 (Bulgarian)
Discussion - What's cooking for FreeBSD 7.0?
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, discussion, freebsd, freebsd7
AVI (105 Mb)
Discussion - What's cooking for FreeBSD 7.0? (Bulgarian)
Dimitri Vasileva - Visualizing Security Threats with Social Networking Software
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, presentation, freebsd, security, social networking, dimitri vasileva
AVI (331 Mb)
Dimitri Vasileva - Visualizing Security Threats with Social Networking Software (Bulgarian)
Shcheryana Shopova - SNMP monitoring
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, presentation, freebsd, snmp, monitoring, shcheryana shopova
AVI (271 Mb)
Shcheryana Shopova - SNMP monitoring (Bulgarian)
Willow Vachkov - FreeBSD and the new network and transport protocols (IPv6 and SCTP)
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, presentation, freebsd, ipv6, sctp, willow vanchkov
AVI (251 Mb)
Willow Vachkov - FreeBSD and the new network and transport protocols (IPv6 and SCTP) (Bulgarian)
Atanas Bchvarov - Packet Filtering in FreeBSD
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, presentation, freebsd, atanas bchvarov
AVI (186 Mb)
Atanas Bchvarov - Packet Filtering in FreeBSD (Bulgarian)
Nikolai Denev - FreeBSD goes Zettabyte
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, presentation, freebsd, zettabyte, nikolai denev
AVI (358 Mb)
Nikolai Denev - FreeBSD goes Zettabyte (Bulgarian)
Vasil Dimov - The FreeBSD ports collection - tips and tricks
Source: OpenFest
Added: 27 March 2008
Tags: openfest, openfest2007, presentation, freebsd, ports collection, vasil dimov
AVI (341 Mb)
Vasil Dimov - The FreeBSD ports collection - tips and tricks (Bulgarian)
FreeBSD ports Erwin Lansing
Source: OpenFest
Added: 15 January 2007
Tags: openfest, openfest2006, presentation, freebsd, port manager, erwin lansing
PDF (128 Kb)
Case study : managing a worldwide open source project: FreeBSD port manager
FreeBSD: Hard disk encryption
Source: Linux and FreeBSD video tutorials. For everyone.
Added: 03 May 2007
Tags: unix-tutorial, flash, freebsd, encryption
How to protect your data on FreeBSD machine even
when your computer is turned off? This hard disk
encryption guide will help.
FreeBSD: First time install and configure
Source: Linux and FreeBSD video tutorials. For everyone.
Added: 03 May 2007
Tags: unix-tutorial, flash, freebsd
Tutorial how to install and configure FreeBSD. It
seems that comments in video are in Japanese :)
FreeBSD: using ports system
Source: Linux and FreeBSD video tutorials. For everyone.
Added: 03 May 2007
Tags: unix-tutorial, flash, freebsd, ports
Using ports system in FreeBSD to install etherape.
FreeBSD installation
Source: Linux and FreeBSD video tutorials. For everyone.
Added: 03 May 2007
Tags: unix-tutorial, flash, freebsd
Step-by-step installation of FreeBSD operating system.
Luigi Rizzo - GEOM based disk schedulers for FreeBSD
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, geom, disk schedulers, luigi rzzo
Slides (430 Kb, 40 pages)
GEOM based disk schedulers for FreeBSD
The high cost of seek operations makes the throughput
of disk devices very sensitive to the offered
workload. A disk scheduler can then help reorder
requests to improve the overall throughput of the
device, or improve the service guarantees for
individual users, or both.
Research results in recent years have introduced,
and proven the effectiveness of, a technique called
"anticipatory scheduling". The basic idea behind
this technique is that, in some cases, requests
that cause a seek should not be served immediately;
instead, the scheduler should wait for a short
period of time in case other requests arrive that
do not require a seek to be served. With many common
workloads, dominated by sequential synchronous
requests, the potential loss of throughput caused
by the disk idling times is more than balanced by
the overall reduction of seeks.
While a fair amount of research on disk scheduling
has been conducted on FreeBSD, the results were
never integrated in the OS, perhaps because the
various prototype implementations were very
device-specific and operated within the device
drivers. Ironically, anticipatory schedulers are
instead a standard part of Linux kernels.
This talk has two major contributions:
First, we will show how, thanks to the flexibility
of the GEOM architecture, an anticipatory disk
scheduling framework has been implemented in FreeBSD
with little or no modification to a GENERIC kernel.
While these schedulers operate slightly above the
layer where one would naturally put a scheduler,
they can still achieve substantial performance
improvements over the standard disk scheduler; in
particular, even the simplest anticipatory schedulers
can prevent the complete trashing of the disk
performance that often occurs in presence of multiple
processes accessing the disk.
Secondly, we will discuss how the basic anticipatory
scheduling technique can be used not only to improve
the overall throughput of the disk, but also to
give service guarantees to individual disk clients,
a feature that is extremely important in practice
e.g., when serving applications with pseudo-real-time
constraints such as audio or video streaming ones.
A prototype implementation of the scheduler that
will be covered in the presentation is available
at http://info.iet.unipi.it/~luigi/FreeBSD/
Randi Harper - Automating FreeBSD Installations
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, pxe, sysinstall, randi harper
Slides (33 Kb, 14 pages)
Automating FreeBSD Installations
PXE Booting and install.cfg Demystified
This paper will provide an explanation of the tools
involved in performing an automated FreeBSD install
and a live demonstration of the process.
FreeBSD's sysinstall provides a powerful and flexible
mechanism for automated installs but doesn't get
used very often because of a lack of documentation.
Brooks Davis - Isolating Cluster Jobs for Performance and Predictability
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, cluster, brooks davis
Slides (1.4 Mb, 27 pages)
Isolating Cluster Jobs for Performance and Predictability
At The Aerospace Corporation, we run a large FreeBSD
based computing cluster to support engineering
applications. These applications come in all shapes,
sizes, and qualities of implementation. To support
them and our diverse userbase we have been searching
for ways to isolate jobs from one another in ways
that are more effective than Unix time sharing and
more fine grained than allocating whole nodes to
jobs.
In this talk we discuss the problem space and our
efforts so far. These efforts include implementation
of partial file systems virtualization and CPU
isolation using CPU sets.
John Baldwin - Multiple Passes of the FreeBSD Device Tree
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, device tree, john baldwin
Slides (60 Kb, 15 pages), Paper (103 Kb, 8 pages)
Multiple Passes of the FreeBSD Device Tree
The existing device driver framework in FreeBSD
works fairly well for many tasks. However, there
are a few problems that are not easily solved with
the current design. These problems include having
"real" device drivers for low-level hardware such
as clocks and interrupt controllers, proper resource
discovery and management, and allowing most drivers
to always probe and attach in an environment where
interrupts are enabled. I propose extending the
device driver framework to support multiple passes
over the device tree during boot. This would allow
certain classes of drivers to be attached earlier
and perform boot-time setup before other drivers
are probed and attached. This in turn can be used
to develop solutions to the earlier list of problems.
Warner Losh - Tracking FreeBSD in a commercial Environment
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, commercial environment, waner losh
Paper (624 Kb, 45 pages), Slides (104 Kb, 10 pages)
Tracking FreeBSD in a commercial Environment
How to stay current while staying sane
The FreeBSD project publishes two lines of source
code: current and stable. All changes must first
be committed to current and then are merged into
stable. Commercial organizations wishing to use
FreeBSD in their products must be aware of this
policy. Four different strategies have developed
for tracking FreeBSD over time. A company can choose
to run only unmodified release versions of FreeBSD.
A company may choose to import FreeBSD's sources
once and then never merge newer versions. A company
can choose to import each new stable branch as it
is created, adding its own changes to that branch,
as well as integrating new versions from FreeBSD
from time to time. A company can track FreeBSD's
current branch, adding to it their changes as well
as newer FreeBSD changes. Which method a company
chooses depends on the needs of the company. These
methods are explored in detail, and their advantages
and disadvantages are discussed. Tracking FreeBSD's
ports and packages is not discussed.
Companies building products based upon FreeBSD have
many choices in how to use the projects sources and
binaries. The choices range from using unmodified
binaries from FreeBSD's releases, to tracking modify
FreeBSD heavily and tracking FreeBSD's evolution
in a merged tree. Some companies may only need to
maintain a stable version of FreeBSD with more bug
fixes or customizations than the FreeBSD project
wishes to place in that branch. Some companies also
wish to contribute some subset of their changes
back to the FreeBSD project.
FreeBSD provides an excellent base technology with
which to base products. It is a proven leader in
performance, reliability and scalability. The
technology also offers a very business friendly
license that allows companies to pick and choose
which changes they wish to contribute to the community
rather than forcing all changes to be contributed
back, or attaching other undesirable license
conditions to the code.
However, the FreeBSD project does not focus on
integration of its technology into customized
commercial products. Instead, the project focuses
on producing a good, reliable, fast and scalable
operating system and associated packages. The project
maintains two lines of development. A current branch,
where the main development of the project takes
place, and a stable branch which is managed for
stability and reliability. While the project maintains
documentation on the system, including its development
model, relatively little guidance has been given
to companies in how to integrate FreeBSD into their
products with a minimum of trouble.
Developing a sensible strategy to deal with both
these portions of FreeBSD requires careful planning
and analysis. FreeBSD's lack of guidelines to
companies leaves it up to them to develop a strategy.
FreeBSD's development model differs from some of
the other Free and Open Source projects. People
familiar with those systems often discover that
methods that were well suited to them may not work
as well with FreeBSD's development model. These two
issues cause many companies to make poor decisions
without understanding the problems that lie in their
future.
Very little formal guidance exists for companies
wishing to integrate FreeBSD into their products.
Some email threads can be located via a Google
search that could help companies, but many of them
are full of contradictory information, and it is
very disorganized. While the information about the
FreeBSD development process is in the FreeBSD
handbook, the implications of that process for
companies integrating FreeBSD into their products
are not discussed.
Kris Moore - PC-BSD - Making FreeBSD on the desktop a reality
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, pc-bsd, freebsd, kris moore
Paper (351 Kb, 9 pages), Slides (512 Kb, 35 pages)
PC-BSD - Making FreeBSD on the desktop a reality
FreeBSD on the Desktop
While FreeBSD is a all-around great operating system,
it is greatly lagging behind in desktop appeal. Why
is this? In this talk, we will take a look at some
of the desktop drawbacks of FreeBSD, and how are
are attempting to fix them through PC-BSD.
FreeBSD has a reputation for its rock-solid
reliability, and top-notch performance in the server
world, but is noticeably absent when it comes to
the vast market of desktop computing. Why is this?
FreeBSD offers many, if not almost all of the same
open-source packages and software that can be found
in the more popular Linux desktop distributions,
yet even with the speed and reliability FreeBSD
offers, a relative few number of users are deploying
it on their desktops.
In this presentation we will take a look at some
of the reasons why FreeBSD has not been as widely
adopted in the desktop market as it has on the
server side. Several of the desktop weaknesses of
FreeBSD will be shown, along with how we are trying
to fix these short-comings through a desktop-centric
version of FreeBSD, known as PC-BSD. We will also
take a look at the package management system employed
by all open-source operating systems alike, and
some of the pitfalls it brings, which may hinder
widespread desktop adoption.
Sean Bruno - Implementation of TARGET_MODE applications
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, firewire, sean bruno
Slides (72 Kb, 22 pages)
Implementation of TARGET_MODE applications
How we used TARGET_MODE in the kernel to create and
interesting product
This presentation will cover a real world implementation
of the TARGET_MODE infrastructure in the kernel
(stable/6). Topics to include: drivers used (isp,
aic7xxx, firewire). scsi_target userland code vs
kernel drivers missing drivers (4/8G isp support,
iSCSI target)
Target Mode describes a feature within certain
drivers that allows a FreeBSD system to emulate a
Target in the SCSI sense of the word. By recompiling
your kernel with this feature enabled, it permits
one to turn a FreeBSD system into an external hard
disk. This feature of the FreeBSD kernel provides
many interesting implementations and is highly
desirable to many organizations whom run FreeBSD
as their platform.
I have been tasked with the maintenance of a
proprietary target driver that interfaces with the
FreeBSD kernel to do offsite data mirroring at the
block level. This talk will discuss the implementation
of that kernel mode driver and the process my
employer went through to implement a robust and
flexible appliance.
Since I took over the implementation, we have
implemented U160 SCSI(via aic7xxx), 2G Fibre
Channel(via isp) and Firewire 400 (via sbp_targ).
Each driver has it's own subtleties and requirements.
I personally enhanced the existing Firewire target
driver and was able to get some interesting results.
I hope to demonstrate a functional Firewire 400/800
target and show how useful this application can be
for the embedded space. Also, I wish to demonstrate
the need for iSCSI. USB and 4/8G Fibre Channel
target implementations that use the TARGET_MODE
infrastructure that is currently in place to allow
others to expand their various interface types.
The presentation should consist of a high level
overview, followed by detailed implementation
instructions with regards to the Firewire implementation
and finish up with a hands-on demonstration with a
FreeBSD PC flipped into TARGET_MODE and a Mac.
George Neville-Neil - Understanding and Tuning SCHED_ULE
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, sched_ule, george neville-neil
Slides (228 Kb, 29 pages)
Understanding and Tuning SCHED_ULE
With the advent of widespread SMP and multicore CPU
architectures it was necessary to implement a new
scheduler in the FreeBSD operating system. The
SCHEDULE scheduler was added for the 5 series of
FreeBSD releases and has now matured to the point
where it is the default scheduler in the 7.1 release.
While scheduling processes was a difficult enough
task in the uniprocessor world, moving to multiple
processors, and multiple cores, has significantly
increased the number of problems that await engineers
who wish to squeeze every last ounce of performance
out of their system. This talk will cover the basic
design of SCHEDULE and focus a great deal of attention
on how to tune the scheduler for different workloads,
using the sysctl interfaces that have been provided
for that purpose.
Understanding and tuning a scheduler used to be
done only by operating systems designers and perhaps
a small minority of engineers focusing on esoteric
high performance systems. With the advent of
widespread multi-processor and multi-core architectures
it has become necessary for more users and
administrators to decide how to tune their systems
for the best performance. The SCHEDULE scheduler
in FreeBSD provides a set of sysctl interfaces for
tuning the scheduler at run time, but in order to
use these interfaces effectively the scheduling
process must first be understood. This presentation
will give an overview of how SCHEDULE works and
then will show several examples of tuning the system
with the interfaces provided.
The goal of modifying the scheduler's parameters
is to change the overall performance of programs
on the system. One of the first problems presented
to the person who wants to tune the scheduler is
how to measure the effects of their changes. Simply
tweaking the parameters and hoping that that will
help is not going to lead to good results. In our
recent experiments we have used the top(1) program
to measure our results.
Lawrence Stewart - Improving the FreeBSD TCP Implementation
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, freebsd, tcp, lawrence stewart
Slides (2.1 Mb, 38 pages)
Improving the FreeBSD TCP Implementation.
An update on all things TCP in FreeBSD and how they
affect you.
My involvement in improving the FreeBSD TCP stack
has continued this past year, with much of the work
targeted at FreeBSD 8. This talk will cover what
these changes entail, why they are of interest to
the FreeBSD community and how they help to improve
our TCP implementation.
It has been a busy year since attending my inaugural
BSDCan in 2008, where I talked about some of my
work with TCP in FreeBSD.
I have continued the work on TCP analysis/debugging
tools and integrating modular congestion control
into FreeBSD as part of the NewTCP research project.
I will provide a progress update on this work.
Additionally, a grant win from the FreeBSD Foundation
to undertake a project titled "Improving the FreeBSD
TCP Implementation" at Swinburne University's Centre
for Advanced Internet Architectures has been
progressing well. The project focuses on bringing
TCP Appropriate Byte Counting (RFC 3465), reassembly
queue auto-tuning and integration of low-level
analysis/debugging tools to the base system, all
of which I will also discuss.
Ivan Voras - Remote and mass management of systems with finstall
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, finstall, management, freebsd, ivan voras
Slides (377 Kb, 24 pages)
Remote and mass management of systems with finstall
Automated management on a largish scale
An important part of the "finstall" project, created
as a graphical installer for FreeBSD, is a configuration
server that can be used to remotely administer and
configure arbitrary systems. It allows for remote
scripting of administration tasks and is flexible
enough to support complete reconfiguration of running
systems.
The finstall project has two major parts - the
front-end and the back-end. The front-end is just
a GUI allowing the users to install the system in
a convenient way. The back-end is a network-enabled
XML-RPC server that is used by the front-end to
perform its tasks. It can be used as a stand-alone
configuration daemon. This talk will describe a way
to make use of this property of finstall to remotely
manage large groups of systems.
Mike Silbersack - Detecting TCP regressions with tcpdiff
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, tcpdiff, freebsd, mike silbersack
Slides (89 Kb, 33 pages)
Detecting TCP regressions with tcpdiff
Determining if a TCP stack is working correctly is
hard. The tcpdiff project aims for a simpler goal:
To automatically detect differences in TCP behavior
between different versions of an operating system
and display those differences in an easy to understand
format. The value judgement of whether a certain
change between version X and Y of a TCP stack is
good or bad will be left to human eyes.
Determining if a TCP stack is working correctly is
hard. The tcpdiff project aims for a simpler goal:
To automatically detect differences in TCP behavior
between different versions of an operating system
and display those differences in an easy to understand
format. The value judgement of whether a certain
change between version X and Y of a TCP stack is
good or bad will be left to human eyes.
The initial version of tcpdiff presented at NYCBSDCon
2008 demonstrated that it could be used to detect
at least two major TCP bugs that were introduced
into FreeBSD in the past few years. The work from
that presentation can be viewed at
http://www.silby.com/nycbsdcon08/.
For BSDCan 2009, I hope to fix a number of bugs in
tcpdiff, make it easier to use, set up nightly tests
of FreeBSD, and improve it so that additional known
bugs can be detected. Additionally, I plan to run
it on OSes other than FreeBSD.
Philip Paeps - Crypto Acceleration on FreeBSD
Source: BSDCan - The Technical BSD Conference
Added: 25 May 2009
Tags: bsdcan, bsdcan2009, presentation, crypto acceleration, freebsd, philip paeps
Slides (361 Kb, 28 pages)
Crypto Acceleration on FreeBSD
As more and more services on the internet become
cryptographically secured, the load of cryptography
on systems becomes heavier and heavier. Crypto
acceleration hardware is available in different
forms for different workloads. Embedded communications
processors from VIA and AMD have limited acceleration
facilities in silicon and various manufacturers
build hardware for accelerating secure web traffic
and IPSEC VPN tunnels.
This talk gives an overview of FreeBSD's crypto
framework in the kernel and how it can be used
together with OpenSSL to leverage acceleration
hardware. Some numbers will be presented to demonstrate
how acceleration can improve performance - and how
it can curiously bring a system to a grinding halt.
Philip originally started playing with crypto
acceleration when he saw the "crypto block" in one
of his Soekris boards. As usual, addiction was
instant and by the grace of the "you touch it, you
own it" principle, he has been fiddling the crypto
framework more than is good for him.
Scott Ullrich, Chris Buechler - pfSense Tutorial
Source: BSDCan - The Technical BSD Conference
Added: 28 May 2008
Tags: bsdcan, bsdcan2008, tutorial, freebsd, pfsense, scott ullrich, chris buechler
PDF file (4.1 Kb, 91 pages)
pfSense Tutorial
From Zero to Hero with pfSense
pfSense is a free, open source customized distribution
of FreeBSD tailored for use as a firewall and router.
In addition to being a powerful, flexible firewalling
and routing platform, it includes a long list of
related features and a package system allowing
further expandability without adding bloat and
potential security vulnerabilities to the base
distribution. pfSense is a popular project with
more than 1 million downloads since its inception,
and proven in countless installations ranging from
small home networks protecting a PC and an Xbox to
large corporations, universities and other organizations
protecting thousands of network devices.
This tutorial is being presented by the founders
of the pfSense project, Chris Buechler and Scott
Ullrich.
The session will start with an introduction to the
project, hardware sizing and selection, installation,
firewalling concepts and basic configuration, and
continue to cover all the most popular features of
the system. Common usage scenarios, deployment
considerations, step by step configuration guidance,
and best practices will be covered for each feature.
Most configurations will be demonstrated in a live
lab environment.
Attendees are assumed to have basic knowledge of
TCP/IP and firewalling concepts, however no in-depth
knowledge in these areas or prior knowledge of
pfSense or FreeBSD is necessary.
Bjoern A. Zeeb - BSDCan08 devsummit summary
Source: BSDCan - The Technical BSD Conference
Added: 28 May 2008
Tags: bsdcan, bsdcan2008, devsummit, devsummit2008, freebsd, writeup, bjoern a zeeb
200805DevSummit - BSDCan 2008 FreeBSD Developer summit summary
Rafal Jaworowski - FreeBSD Embedded Report
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, devsummit, devsummit2008, freebsd, embedded, rafal jaworowski
PDF file (58 Kb, 6 pages)
FreeBSD Embedded Report
Robert Watson - TCP SMP Scalability
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, devsummit, devsummit2008, freebsd, smp, robert watson
PDF file (70 Kb, 8 pages)
TCP SMP Scalability
Erwin Lansing - What's happening in the world of ports and portmgr
Source: BSDCan - The Technical BSD Conference
Added: 24 May 2008
Tags: bsdcan, bsdcan2008, devsummit, devsummit2008, freebsd, portmgr, erwin lansing
PDF file (146 Kb, 14 pages)
What's happening in the world of ports and portmgr
Warner Losh - FreeBSD/mips
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, slides, freebsd, mips, embedded, warner losh
PDF file (1.3 Mb, 19 pages)
FreeBSD/mips
Embedding FreeBSD
FreeBSD now runs on the MIPS platform. FreeBSD/mips
supports MIPS-32 and MIPS-64 targets, including SMP
for multicore support.
FreeBSD/mips is targeted at the embedded MIPS
marketplace. FreeBSD has run on the MIPS platform
for many years. Juniper ported FreeBSD to the Mips
platform in the late 1990's. However, concern about
intellectual property issues kept Juniper from
contributing the port back to FreeBSD until recently.
The contributed port was a 64-bit mips port.
In the mean time, many efforts were made to bring
FreeBSD to the mips platform. The first substantial
effort to bring FreeBSD to the Mips platform was
done by Juli Mallet. This effort made it to single
user, but never further than that. This effort was
abandoned due to a change in Juli's life. The port
languished.
Two years ago at BSDcan, as my involvement with
FreeBSD/arm was growing, I tried to rally the troops
into doing a FreeBSD/mips port. My efforts resulted
in what has been commonly called the "mips2" effort.
The name comes from the choice of //depot/projects/mips2
to host the work in perforce. A number of people
worked on the earliest versions of the port, but
it too languished and seemed destined to suffer the
same fate as earlier efforts. Then, two individuals
stood up and started working on the port. Wojciech
A. Koszek and Oleksandr Tymoshenko pulled in code
from the prior efforts. Through their efforts of
stabilizing this code, the port to the single user
stage and ported it to three different platforms.
Others ported it to a few more. Snapshots of this
work were released from time to time.
Cavium Networks picked up one of these snapshots
and ported it to their multicore mips64 network
processor. Cavium has kindly donated much of their
work to the comminuty.
In December, I started at Cisco systems. My first
job was to merge all the divergent variants of
FreeBSD/mips and get it into shape to push into the
tree. With luck, this should be in the tree before
I give my talk.
In parallel to this, other advances in the embedded
support for FreeBSD have been happening as well.
I'll talk about new device drivers, new subsystems,
and new build tools that help to support the embedded
developer.
Ivan Voras - "finstall" - the new FreeBSD installer
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, slides, freebsd, installer, ivan voras
PDF file (1.1 Mb, 39 pages)
"finstall" - the new FreeBSD installer
A graphical installer for FreeBSD
The "finstall" project, sponsored by Google as a
Summer of Code 2007 project, is an attempt to create
a user-friendly graphical installer for FreeBSD,
with enough strong technical features to appeal to
the more professional users. A long term goal for
it is to be a replacement for sysinstall, and as
such should support almost all of the features
present in sysinstall, as well as add support for
new FreeBSD features such as GEOM, ZFS, etc. This
talk will describe the architecture of "finstall"
and focus on its lesser known features such as
remote installation.
"finstall" is funded by Google SoC as a possible
long-term replacement for sysinstall, as a "LiveCD"
with the whole FreeBSD base system on the CD, with
X11 and XFCE4 GUI. In the talk I intend to describe
what I did so far, and what are the future plans
for it. This includes the installer GUI, the backend
(which has the potential to become a generic FreeBSD
configuration backend) and the assorted tools
developed for finstall ("LiveCD" creation scripts).
More information on finstall can be found here:
http://wiki.freebsd.org/finstall.
Pawel Jakub Dawidek - A closer look at the ZFS file system
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, zfs, freebsd, pawel jakub dawidek
PDF file (150 Kb, 33 pages)
A closer look at the ZFS file system
simple administration, transactional semantics, end-to-end data integrity
SUN's ZFS file system became part of FreeBSD on 6th
April 2007. ZFS is a new kind of file system that
provides simple administration, transactional
semantics, end-to-end data integrity, and immense
scalability. ZFS is not an incremental improvement
to existing technology; it is a fundamentally new
approach to data management. We've blown away 20
years of obsolete assumptions, eliminated complexity
at the source, and created a storage system that's
actually a pleasure to use.
ZFS presents a pooled storage model that completely
eliminates the concept of volumes and the associated
problems of partitions, provisioning, wasted bandwidth
and stranded storage. Thousands of file systems can
draw from a common storage pool, each one consuming
only as much space as it actually needs. The combined
I/O bandwidth of all devices in the pool is available
to all filesystems at all times.
All operations are copy-on-write transactions, so
the on-disk state is always valid. There is no need
to fsck(1M) a ZFS file system, ever. Every block
is checksummed to prevent silent data corruption,
and the data is self-healing in replicated (mirrored
or RAID) configurations. If one copy is damaged,
ZFS detects it and uses another copy to repair it.
Rafal Jaworowski - Interfacing embedded FreeBSD with U-Boot
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, embedded, freebsd, u-boot, rafal jaworowski
PDF file (300 Kb, 26 pages)
Interfacing embedded FreeBSD with U-Boot
Working with the de facto standard for an initial level boot loader
In the embedded world U-Boot is a de facto standard
for an initial level boot loader (firmware). It
runs on a great number of platforms and architectures,
and is open source.
This talk covers the development work on integrating
FreeBSD with U-Boot-based systems. Starting with
an overview of differences between booting an
all-purpose desktop computer vs. embedded system,
FreeBSD booting concepts are explained along with
requirements for the underlying firmware.
Historical attempts to interface FreeBSD with this
firmware are mentioned and explanation given on why
they failed or proved incomplete. Finally, the
recently developed approach to integrate FreeBSD
and U-Boot is presented, with implementation details
and particular attention on how it's been made
architecture and platform independent, and how
loader(8) has been bound to it.
John Baldwin - Introduction to Debugging the FreeBSD Kernel
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, paper, debugging, freebsd, john baldwin
paper, PDF file (121 Kb, 15 pages), slides, PDF file (113 Kb, 26 pages)
Introduction to Debugging the FreeBSD Kernel
Just like every other piece of software, the FreeBSD
kernel has bugs. Debugging a kernel is a bit different
from debugging a userland program as there is nothing
underneath the kernel to provide debugging facilities
such as ptrace() or procfs. This paper will give a
brief overview of some of the tools available for
investigating bugs in the FreeBSD kernel. It will
cover the in-kernel debugger DDB and the external
debugger kgdb which is used to perform post-mortem
analysis on kernel crash dumps.
Introduction to Debugging the FreeBSD Kernel
- Basic crash messages, what a crash looks like
- typical panic() invocation
- page fault example
- "live" debugging with DDB
- stack traces
- ps
- deadlock examples
- show lockchain
- show sleepchain
- Adding new DDB commands
- KGDB
- inspecting processes and threads
- working with kernel modules
- using scripts to extend
- examining crashdumps using utilities
- debugging strategies
- kernel crashes
- system hangs
John Birrell - DTrace for FreeBSD
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, dtrace, freebsd, john birrell
PDF file (148 Kb, 49 pages)
DTrace for FreeBSD
What on earth is that system doing?!
DTrace is a comprehensive dynamic tracing facility
originally developed for Solaris that can be used
by administrators and developers on live production
systems to examine the behavior of both user programs
and of the operating system itself. DTrace enables
users to explore their system to understand how it
works, track down performance problems across many
layers of software, or locate the cause of aberrant
behavior. DTrace lets users create their own custom
programs to dynamically instrument the system and
provide immediate, concise answers to arbitrary
questions you can formulate using the DTrace D
programming language.
This talk discusses the port of the DTrace facility
to FreeBSD and demonstrates examples on a live
FreeBSD system.
- Introduction to the D language - probes, predicates and actions.
- dtrace(8) and libdtrace - the userland side of the DTrace story.
- The DTrace kernel module, it's ioctl interface to userland and the provider infrastructure in the kernel.
- DTrace kernel hooks and the problem of code licensed under Sun's CDDL.
- What does a DTrace probe actually do?
- DTrace safety and how it is implemented.
- Build system changes to add CTF (Compact C Type Format) data to objects, shared libraries and executables.
- The DTrace test suite.
- A brief list of things to do to port the DTrace facility to other BSD-derived operating systems.
Randall Stewart - SCTP what it is and how to use it
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, abstract, freebsd, sctp, randall stewart
PDF file (130 Kb, 10 pages)
SCTP - SCTP what it is and how to use it
This talk will introduce the attendee into the
interesting world of SCTP.
We will first discuss the new and different features
that SCTP (a new transport in FreeBSD 7.0) provide
to the user. Then we will shift gears and discuss
the extended socket API that is available to SCTP
users and will cover such items as:
- The two socket programming models
- Extended system calls that support the SCTP feature set.
- What model may fit you best
Rafal Jaworowski - Porting FreeBSD/ARM to Marvell Orion System-On-Chip
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, freebsd, arm, marvell orion, rafal jaworowski
PDF file (193 Kb, 25 pages)
Porting FreeBSD/ARM to Marvell Orion System-On-Chip
This talk covers the development work on porting
the FreeBSD/ARM to Marvell Orion family of highly
integrated chips.
ARM architecture is widely adopted in the embedded
devices, and since the architecture can be licensed,
many implementation variations exist: Orion is a
derivative compliant with the ARMv5TE definition,
it provides a rich set of on-chip peripherals.
Present state of the FreeBSD support for ARM is
explained, areas for improvement highlighted and
its overall shape and condition presented.
The main discussion covers scope of the Orion port
(what integrated peripherals required new development,
what was adapted from existing code base); design
decisions are explained for the most critical items,
and implementation details revealed.
Summary notes are given on general porting methodology,
debugging techniques and difficulties encountered
during such undertaking.
The FreeBSD Security Officer function
Source: BSDCan - The Technical BSD Conference
Added: 20 May 2007
Tags: bsdcan, bsdcan2007, pdf, freebsd, security officer, simon l nielsen
PDF version (252 Kb, 29 pages)
"FreeBSD Security Officer function" at BSDCAN 2007 by Simon L. Nielsen (FreeBSD Deputy Security Officer)
FreeBSD Portsnap
Source: BSDCan - The Technical BSD Conference
Added: 20 May 2007
Tags: bsdcan, bsdcan2007, pdf, portsnap, freebsd, colin percival
PDF version (1.3 Mb, 88 pages)
"FreeBSD Portsnap -
What (it is), Why (it was written), and How (it works)"
by Colin Percival (cperciva@FreeBSD.org)
(Note: use ^L to get back in non-fullscreen mode)
BSDConTR 2007 - Presentations
Source: BSDConTR - Turkish Conference on BSD Systems
Added: 31 October 2007
Tags: bsdcontr, bsdcontr2007, pdf, freebsd 7.0, freebsd, kris kennaway
PDF version (336 Kb, 37 pages)
Introducing FreeBSD 7.0
Server deployment in mass-hosting environment using FreeBSD Ports system by Stanislav Sedov (in russian)
Source: Hostobzor, the Russian conference of hosting provider
Added: 24 November 2008
Tags: hostobzor, hostobzor12, freebsd, ports, stanislav sedov, russian
PDF version (470 Kb, 30 pages), PDF version (61 Kb, 5 pages)
Recently I have been attending Hostobzor 12th, the
Russian conference of hosting providers, beeing
held at Raivola hotel near St. Petersburg. The event
was great as always thanks to organizers. There was
a number of intersting talks given, a lot of
interesting discussions held, and, what I appreciate
better, a lot of new people with great ideas met.
I gave a talk on using the FreeBSD Ports system to
mange a large-scale virtual hosting installations
based on Hosting Telesystems experience. I tried
to describe in detail how we use the ports collection
to deploy a large number of servers diverced by
architecture and OS versions, how we build packages
and distribute them among servers, talked about how
we use Mercurial VCS to incrementally merge upstream
changes into our modified ports collection and
FreeBSD src trees. Hopefully, I've not screwed it
much... At least, some people was interested a lot
and asked interesting questions.
Welcome - Cambridge University FreeBSD DevSummit - Robert Watson
Source: FreeBSD Developer Summit - Cambridge
Added: 25 August 2008
Tags: devsummit2008, devsummit, pdf, freebsd, robert watson
PDF version (264 Kb, 12 pages)
Welcome by Robert Watson
variant Symlinks - Brooks Davis
Source: FreeBSD Developer Summit - Cambridge
Added: 25 August 2008
Tags: devsummit2008, devsummit, pdf, freebsd, variant symlinks, brooks davis
PDF version (213 Kb, 15 pages)
Variant Symlinks by Brooks Davis
Van FreeBSD Documentatie projectleider tot FreeBSD Developer - Remko Lodder
Source: Nederlandse Linux Gebruikers Group
Added: 31 December 2008
Tags: nllgg, freebsd, documentation, nederlands, remko lodder
PDF version (594 Kb, 24 pages)
In 2004 ben ik begonnen met het FreeBSD Dutch
Documentation Project, een project dat inmiddels
bijna het complete handboek vertaald heeft. Sinds
die tijd zijn er vele wegen geweest die ik behandeld
heb, van documentatie projectleider naar Security
Team-lid tot aan FreeBSD Developer.
Remko Lodder is momenteel 25 jaar en werkt als Unix
Engineer voor het bedrijf Snow B.V. waar hij zich
momenteel met name bezig houd met security (firewalls
etc). Hij is sinds 2004 lid van het FreeBSD Development
team en is momenteel 1 van de meest actieve developers
binnen het team.
FreeBSD Google Summer of Code posters
Source: FreeBSD Google Summer of Code
Added: 22 March 2009
Tags: freebsd, google, summer of code
PDF version (815 Kb, 1 page), PNG version (1.1 Mb, 2480 x 3507 pixels)
Two posters usable for the announcement of the
participation of the FreeBSD Project in the Google
Summer of Code.
PmcTools talk at the Bangalore chapter of the ACM
Source: Joseph Koshy
Added: 24 May 2009
Tags: freebsd, presentation, freebsd, pmctools, joseph koshy
PDF version (550 Kb, 48 pages)
In April 2009 I was invited to speak on FreeBSD/PmcTools
by the Bangalore chapter of the ACM.
This was an overview talk. The talk briefly touched
upon: the motivations and goals of the project, the
programming APIs, some aspects of the implementation
and on possible future work.
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