lkml.org 
[lkml]   [2001]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] scheduler cache affinity improvement for 2.4 kernels

Davide,

On Thu, 8 Nov 2001, Davide Libenzi wrote:

> Maybe you missed this :
>
> http://www.xmailserver.org/linux-patches/mss.html
>
> where the patch that does this is here :
>
> http://www.xmailserver.org/linux-patches/lnxsched.html#CPUHist

i'm not sure what the patch is trying to achieve, but this part of
mcsched-2.4.13-0.4.diff looks incorrect:

+ prev->cpu_jtime += (jiffies - prev->sched_jtime) + jiffies;

(this is "2*jiffies - prev->sched_jtime" which doesnt appear to make much
sense - does it?)

and your patch adds a scheduling advantage to processes with more cache
footprint, which is the completely opposite of what we want.

but in any case, changing the goodness() function was not a goal of my
patch, i change the granularity of how processes lose their 'effective
priority'.

Ingo

-
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 13:13    [W:0.093 / U:0.540 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site