> >> davidg 95/03/03 20:28:51
> >>
> >> Modified: sys/net if_loop.c
> >> Log:
> >> Reduced loopback MTU to 16k to work around a miriad of problems with it
> >> set near or above 32k (likely caused by 16bit signed word overflow). 16k
> >> actually (surprizingly) has higher performance than other values I tested.
> >
> >Probably because it matches our default TCP-window, thus making it possible
> >to return to user-space and effectively run in parallel.
>
> An interesting thought...but I think it's much more complicated than that.
A very good candidate for "understatement of the year". The major part of
the last year I have tried to get ATM to perform, and I have learned that
unless you actually see it on the line, you shouldn't assume anything about
what's in a packet.
--
Poul-Henning Kamp <phk@login.dknet.dk>
TRW Financial Systems, Inc.
I am Pentium Of Borg. Division is Futile. You WILL be approximated.