linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Cliff White <cliffw@osdl.org>
To: Con Kolivas <conman@kolivas.net>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@digeo.com>,
	cliffw@osdl.org
Subject: Re: [BENCHMARK] fork_load module tested for contest
Date: Wed, 25 Sep 2002 15:14:26 -0700	[thread overview]
Message-ID: <200209252214.g8PMEQd06269@mail.osdl.org> (raw)
In-Reply-To: Message from Con Kolivas <conman@kolivas.net>  of "Thu, 26 Sep 2002 00:42:16 +1000." <1032964936.3d91cb48b1cca@kolivas.net>


> 
> 
> I've been trialling a new load module for the contest benchmark
> (http://contest.kolivas.net) which simply forks a process that does nothing,
> waits for it to die, then repeats. Here are the results I have obtained so far:
> 
> noload:
> Kernel                  Time            CPU             Ratio
> 2.4.19                  72.90           99%             1.00
> 2.4.19-ck7              71.55           100%            0.98
> 2.5.38                  73.86           99%             1.01
> 2.5.38-mm2              73.93           99%             1.01
> 
> fork_load:
> Kernel                  Time            CPU             Ratio
> 2.4.19                  100.05          69%             1.37
> 2.4.19-ck7              74.65           95%             1.02
> 2.5.38                  77.35           95%             1.06
> 2.5.38-mm2              76.99           95%             1.06
> 
> ck7 uses O1, preempt, low latency
> Preempt=N for all other kernels
> 
> Clearly you can see the 2.5 kernels have a substantial lead over the current
> stable kernel.
> 
> This load module is not part of the contest package yet. I could certainly
> change it to fork n processes but I'm not really sure just how many n should be.

I think for OSDL/STP, it would be nice if n == number of CPU's, so maybe make 
'n' an arg?
When you say the process 'does nothing', what do you mean? It forks, then the 
child does exit() ?
cliffw
> 
> Comments?
> 
> Con Kolivas
> 
> P.S. Results have negligible differences on repeat testing.
> -
> 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/
> 



  parent reply	other threads:[~2002-09-25 22:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-25 14:42 Con Kolivas
2002-09-25 14:52 ` Rik van Riel
2002-09-25 22:14 ` Cliff White [this message]
2002-09-25 23:07   ` Con Kolivas
2002-09-26  2:57 ` Useful fork info? WAS " Con Kolivas
2002-09-26  8:25   ` Ingo Molnar
2002-09-26 14:42     ` Rik van Riel
2002-09-26  8:36   ` William Lee Irwin III

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200209252214.g8PMEQd06269@mail.osdl.org \
    --to=cliffw@osdl.org \
    --cc=akpm@digeo.com \
    --cc=conman@kolivas.net \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: [BENCHMARK] fork_load module tested for contest' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).