lkml.org 
[lkml]   [2007]   [Nov]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [NET]: rt_check_expire() can take a long time, add a cond_resched()
From
From: Andi Kleen <andi@firstfloor.org>
Date: Sat, 17 Nov 2007 13:56:08 +0100

> Arjan van de Ven <arjan@infradead.org> writes:
> >> >
> >> > Its not that cheap. The ChangeLog included my own numbers, on a
> >> > Pentium M machine. (i686, 1.6 GHz, 1.5 GB ram)
> >> >
> >> > Without "if (need_resched())" (so calling need_resched() X.XXX.XXX
> >> > times), each run takes 88ms
> >> >
> >> > With the extra check (and *much* less function calls), each run
> >> > takes 25ms
>
> ms?!? The numbers sound wrong. Wrong unit?

Read what Eric is saying. He is saying "any entire run" purging
the routing cache takes that long, not just one call.
-
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: 2007-11-18 01:05    [W:0.551 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site