From: Con Kolivas <conman@kolivas.net>
To: Cliff White <cliffw@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [BENCHMARK] fork_load module tested for contest
Date: Thu, 26 Sep 2002 09:07:11 +1000 [thread overview]
Message-ID: <1032995231.3d92419f7ef8b@kolivas.net> (raw)
In-Reply-To: <200209252214.g8PMEQd06269@mail.osdl.org>
Quoting Cliff White <cliffw@osdl.org>:
> >
> > 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?
Ok. I was more interested to know if maybe thousands of processes or something
like that would be interesting.
> When you say the process 'does nothing', what do you mean? It forks, then the
>
> child does exit() ?
Yes the child forked execs nil.c which is basically return 0
Con
next prev parent reply other threads:[~2002-09-25 23:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-25 14:42 [BENCHMARK] fork_load module tested for contest Con Kolivas
2002-09-25 14:52 ` Rik van Riel
2002-09-25 22:14 ` Cliff White
2002-09-25 23:07 ` Con Kolivas [this message]
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
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