[parisc-linux] LMBench results on for the C200 for HP-UX 10.20, Linux 2.4.24-pa0, and Linux 2.6.0-pa8

[Randolph Chung]

> HP-UX fork is fast! linux 2.6 seems to bring some relief here. I always
> marvel how fast HP-UX is when responding to a telnet login.
> Instantaneus. Probably fork() speed compensates the lower latency linux
> has in other areas.

The reason why fork() is so slow on palinux is that we flush the entire
cache for each fork() operation. this is clearly a very bad thing.
unfortunately this doesn't seem like a simple thing to fix. From some
previous discussions it seems like we don't need to do the cache
flushing for fork(), but when i got rid of it the system crashes very
quickly. Possibly the per-fork cache flush is masking other bugs in the
kernel cache flushing infrastructure.

randolph
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/