lkml.org 
[lkml]   [2002]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [Coder-Com] Re: PROBLEM: high system usage / poor SMP network performance
From
Date
"Darren Smith" <data@barrysworld.com> writes:

> I mean I added a usleep() before the poll in s_bsd.c for the undernet
> 2.10.10 code.
>
> timeout = (IRCD_MIN(delay2, delay)) * 1000;
> + usleep(100000); <- New Line
> nfds = poll(poll_fds, pfd_count, timeout);
>
> And now we're using 1/8th the cpu! With no noticeable effects.

Note that something else you want to do is call poll() with a 0
timeout first (and if that doesn't return anything call again with the
timeout), this removes all the wait queue manipulation inside the
kernel when something is ready (most of the time).

--
# James Antill -- james@and.org
:0:
* ^From: .*james@and\.org
/dev/null
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:24    [W:0.072 / U:0.648 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site