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: slides
Chris Buechler - Network perimeter redundancy with pfsense
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, pfsense, chris buechler
PDF (6.2 Kb, 30 pages)
This session will first provide an introduction and
overview of pfSense and its common uses. It will
then go on to cover means of providing redundancy
for the critical portions of your network perimeter
using pfSense, including redundancy for your Internet
connections, firewalls and DNS. Live configuration
examples will be shown for as many of these topics
as the session's length permits. This session will
cover pfSense 1.2.1, but will also offer an overview
of some of the enhanced capabilities in this area
that pfSense 2.0 will provide in the future.
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.
Henning Brauer - Faster packets: Performance tuning in the OpenBSD network stack and PF
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, openbsd, performance, henning brauer
PDF (27 Mb, 69 pages)
n/a
Kristaps Dzonsons - Process isolation for NetBSD and OpenBSD
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, openbsd, netbsd, process isolation, kristaps dzonsons
PDF (687 Kb, 27 pages)
In NetBSD and OpenBSD, user-land process and
process-context isolation is limited to credential
cross-checks, file-system chroot and explicit
systrace/kauth applications. I'll demonstrate a
working mechanism of isolated process trees in
branched OpenBSD-4.4 and NetBSD-5.0-beta kernels
where an isolated process is started by a system
call similar to fork; following that, the child
process and its descendants execute in a context
isolated from the caller. This system is the continued
work of "mult" -- first prototyped in a branched
NetBSD-3.1 kernel and isolating all system resources
-- pared down to a lightweight, auditable patch of
process-only separation for both OpenBSD and NetBSD.
I specifically address solutions to performance
issues and mechanism design with an eye toward more
resources being isolated in the future.
Robert Luciani - M:N threading in DragonflyBSD
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, dragonflybsd, concurrency, robert luciani
PDF (1.5 Mb, 23 pages)
Ineffective concurrency mechanisms in an operating
system can lead to low performance in both single
and multiprocessor environments. Practical setbacks
involved with attempting overly invasive kernel
changes have made it difficult in the past to
implement new and innovative concurrency systems.
This paper describes the rationale behind interfaces
in the DragonFly BSD operating system intended to
provide high performance and scalability on
multiprocessor architectures. Using a lock-free
processor centric approach, DragonFly BSD has
developed a unique thread system with the potential
for excellent scalability.
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.
Marco Peereboom - Epitome
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, epitome, backup, marco peereboom
PDF (197 Kb, 34 pages)
Tired of tape and their weaknesses? So am I!
Epitome is the next generation backup mechanism.
It is based on the idea of providing instant available
backup data while removing duplicate files & blocks
from backups (yes really!). It is a disk based WORM
backup system.
This talk will go into the Epitome protocol and its
application. The code is generic enough that it can
address all 3 major (buzzword compliant) technologies
known as: CAS, DEDUP & SIS.
Kurt Miller - Implementing PIE on OpenBSD
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, openbsd, pie, kurt miller
PDF (4.1 Mb, 24 pages)
In this session, Kurt will discuss OpenBSD's PIE
implementation, its impact on existing security
mechanisms such as W^X on i386, and the various
enhancements needed to the runtime linker, kernel
and other system libs.
Ted Unangst - OpenBSD vs SMP, threading, and concurrency
Source: DCBSDCon
Added: 24 May 2009
Tags: dcbsdcon, dcbsdcon2009, slides, openbsd, smp, threading, concurrency, ted unangst
PDF (675 Kb, 32 pages)
I will discuss the current status of kernel SMP
support, the rthreads thread library, and relevant
future developments. Over the years, we have
accumulated several concurrency primitives in the
kernel, causing some confusion amongst developers,
so I will lay out the origin and correct usage for
each. The talk is primarily targeted at the budding
OpenBSD kernel developer, but I will also describe
the end-user effects of each topic.
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.
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 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.
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.
Kern Sibbald - Bacula
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, slides, bacula, kern sibbald
PDF file (505 Kb, 30 pages)
Bacula
The Open Source Enterprise Backup Solution
The Bacula project started in January 2000 with
several goals, one of which was the ability to
backup any client from a Palm to a mainframe computer.
Bacula is available under a GPL license.
Bacula uses several distinct components, each
communicating via TCP/IP, to achieve a very scalable
and robust solution to backups.
Kern is one of the original project founders and
still one of the most productive Bacula developers.
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.
Kris Moore - Building self-contained PBIs from Ports (Automagically)
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, slides, pc-bsd, ports, pbi, kris moore
PDF file (120 Kb, 26 pages)
Building self-contained PBIs from Ports (Automagically)
Creating a self-contained application from the ports tree
PC-BSD provides a user-friendly desktop experience,
for experts and casual users alike. PC-BSD is 100%
FreeBSD under the hood, while providing desktop
essentials, such as a graphical installation system,
point-n-click package-management using the PBI
system, and easy to use system management tools;
All integrated into an easy to use K Desktop
Environment (KDE).
The PBI (Push Button Installer) format is the
cornerstone of the PC-BSD desktop, which allows
users to install applications in a self-contained
format, free from dependency problems, and compile
issues that stop most casual users from desktop
adoption. The PBI format also provides power and
flexibility in user interaction, and scripting
support, which allows applications to be fine-tuned
to the best possible user experience.
This talk would go over in some detail our new PBI
building system, which converts a FreeBSD port,
such as FireFox, into a standalone self-contained
PBI installer for PC-BSD desktops.
The presentation will be divided into two main sections:
The Push Button Installer (PBI) Format
- The basics of the PBI format
- The PBI format construction
- Add & Remove scripting support within PBI
Building PBIs from Ports "Auto-magically"
- The PBI build server & standalone software
- Module creation & configuration
- Converting messy ports into PBIs
John Pertalion - An Open Source Enterprise VPN Solution with OpenVPN and OpenBSD
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, slides, openbsd, openvpn, john pertalion
PDF file (127 Kb, 26 pages)
An Open Source Enterprise VPN Solution with OpenVPN and OpenBSD
Solving the problem
At Appalachian State University, we utilize an open
source VPN to allow faculty, staff and vendors
secure access to Appalachian State University's
internal network from any location that has an
Internet connection. To implement our virtual private
network project, we needed a secure VPN that is
flexible enough to work with our existing network
registration and LDAP authentication systems, has
simple client installation, is redundant, allows
multiple VPN server instances for special site-to-site
tunnels and unique configurations, and can run on
multiple platforms. Using OpenVPN running on OpenBSD,
we met those requirements and added a distributed
administration system that allows select users to
allow VPN access to specific computers for external
users and vendors without requiring intervention
from our network or security personnel. Our
presentation will start with a quick overview of
OpenVPN and OpenBSD and then detail the specifics
of our VPN implementation.
Dissatisfied with IPSec for road warrior VPN usage
we went looking for a better solution. We had hopped
that we could find a solution that would run on
multiple platforms, was flexible and worked well.
We found OpenVPN and have been pleased. Initially
we ran it on RHEL. We migrated to OpenBSD for pf
functionality and general security concerns. ...and
because we like OpenBSD.
Our presentation will focus on the specifics of our
VPN implementation. We will quickly cover the basics
of OpenVPN and the most used features of OpenBSD.
Moving along we will cover multiple authentication
methods, redundancy, running multiple instances,
integration with our netreg system, how pf has
extended functionality, embedding in appliances,
and client configuration. The system has proven
helpful with providing vendor access where needed
and we'll cover this aspect as well. Time permitting
we will cover current enhancement efforts and future
plans.
OpenVPN has been called the "Swiss army knife" of
VPN solutions. We hope our presentation leaves
participants with that feeling.
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.
Poul-Henning Kamp - Measured (almost) does Air Traffic Control
Source: BSDCan - The Technical BSD Conference
Added: 26 May 2008
Tags: bsdcan, bsdcan2008, slides, air traffic control, scada, poul-henning kamp
PDF file (7.7 Mb, 46 pages)
Measured (almost) does Air Traffic Control
Monitoring weird hardware reliably
The new Danish Air Traffic Control system, CASIMO,
prompted the development on a modular and general
software platform for data collection, control and
monitoring of "weird hardware" of all sorts.
The talk will present the "measured" daemon, and
detail some of the uses it has been put to, as an,
admittedly peripheral, component of the ATC system.
Many "SCADA" systems suffer from lack of usable
interfaces for external access to the data. Measured
takes the opposite point of view and makes real-time
situation available, and accepts control instructions
as ASCII text stream over TCP connections. Several
examples of how this can be used will be demonstrated.
Measured will run on any FreeBSD system, but has
not been ported to other UNIX variants yet, and it
is perfect for that "intelligent house" project of
yours.
I believe I gave a WIP presentation of this about
two years ago.
Chris Lattner - BSD licensed C++ compiler
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, bsdl, llvm, chris lattner
PDF file (5.8 Mb, 33 pages)
BSD licensed C++ compiler
LLVM is a suite of carefully designed open source
libraries that implement compiler components (like
language front-ends, code generators, aggressive
optimizers, Just-In-Time compiler support, debug
support, link-time optimization, etc.). The goal
of the LLVM project is to build these components
in a way that allows them to be combined together
to create familiar tools (like a C compiler),
interesting new tools (like an OpenGL JIT compiler),
and many other things we haven't thought of yet.
Because LLVM is under continuous development, clients
of these components naturally benefit from improvements
in the libraries.
This talk gives an overview of LLVM's design and
approach to compiler construction, and gives several
example applications. It describes applications of
LLVM technology to llvm-gcc (a C/C++/Objective C
compiler based on the GNU GCC front-end), the OpenGL
stack in Mac OS/X Leopard, and Clang. Among other
things, the Clang+LLVM Compiler provides a fully
BSD-Licensed C and Objective-C compiler (with C++
in development) which compiles code several times
faster than GCC, produces code that is faster than
GCC in many cases, produces better warnings and
error messages, and supports many other applications
(e.g. static analysis and refactoring).
Robert Watson - BSDCan 2008 - Closing
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, robert watson
PDF file (428 Kb, 55 pages)
Closing
Beer, prizes, secrets, Works In Progress
The traditional closing...
with some new and interesting twists. Sleep in if
you must, but don't miss this session.
Leslie Hawthorn - Google SoC
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, google, summer of code, leslie hawthorn
PDF file (2.2 Mb, 44 pages)
Google SoC
Summer of Code
In this talk, I will briefly discuss some general
ways Google's Open Source Team contributes to the
wider community. The rest of the talk will explore
some highlights of the Google Summer of Code program,
our initiative to get university students involved
in Open Source development.
I will cover the program's inception, lessons learned
over time and tips for success in the program for
both mentors and students. In particular, the talk
will detail some experiences of the *BSD mentoring
organizations involved in the program as a case
study in successfully managing the program from the
Open Source project's perspective. Any Google Summer
of Code participants in the audience are welcome
and encouraged to chime in with their own insights.
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.
Matthieu Herrb - X.org
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, x.org, matthieu herrb
PDF file (1.6 Mb, 30 pages)
X.org
upcoming plans
The X.Org project provides an open source implementation
of the X Window System. The development work is
being done in conjunction with the freedesktop.org
community. The X.Org Foundation is the educational
non-profit corporation whose Board serves this
effort, and whose Members lead this work.
The X window system has been changing a lot in the
recent years, and still changing. This talk will
present this evolution, summarizing what has already
been done and showing the current roadmap for future
evolutions, with some focus on how *BSD kernels can
be affected by the developments done with Linux as
the primary target.
Adrian Chad - What Not To Do When Writing Network Applications
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, network applications, adrian chad
PDF file (190 Kb, 73 pages)
What Not To Do When Writing Network Applications
The lessons learnt working with not-so-high-performance network applications
This talk will look at issues which face the modern
network application developer, from the point of
view of poorly-designed examples. This will cover
internal code structure and dataflow, interaction
with the TCP stack, IO scheduling in high and low
latency environments and high-availability
considerations. In essence, this presentation should
be seen as a checklist of what not to do when writing
network applications.
Plenty of examples of well designed network
applications exist in the open and closed source
world today. Unfortunately there are just as many
examples of fast network applications as there are
"fast but workload specific"; sometimes failing
miserably in handling the general case. This may
be due to explicit design (eg Varnish) but many are
simply due to the designer not fully appreciating
the wide variance in "networks" - and their network
application degrades ungracefully when under duress.
My aim in this presentation is to touch on a wide
number of issues which face network application
programmers - most of which seem not "application
related" to the newcomer - such as including
pipelining into network communication, managing a
balance between accepting new requests and servicing
existing requests, or providing back-pressure to a
L4 loadbalancer in case of traffic bursts. Various
schemes for working with these issues will be
presented, and hopefully participants will walk
away with more of an understanding about how the
network, application and operating systems interact.
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.
Dan Langille - BSDCan 2008 - Opening session
Source: BSDCan - The Technical BSD Conference
Added: 21 May 2008
Tags: bsdcan, bsdcan2008, slides, dan langille
PDF file (500 Kb, 17 pages)
Opening session
Welcome to BSDCan 2008
Traditional greetings
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.
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