Hi Vishwanath,
> I am trying to investigate ondemand governor’s limitation in Linux kernel.
> As part of that, I have found a tool called cpufreq-bench which can be used
> to determine the performance degradation due to ondemand governor compared
> to performance governor.
>
> I would need some of your help to run this test bench on some of recent X86
> platforms that have support for many P states. (My PC is little old which
> has only 2 p-states (2.8GHz & 3.4 GHz), so performance degradation is not
> much visible).
> tarball with cpufreqbench and readme is available at
>
http://people.linaro.org/~amitk/cpufreq.tgzI'm just a lurker on the list at the moment but thought I could easily do this to help out. Log attached.
A little feedback on the instructions - cpufreq-bench's Makefile doesn't have an install target although the instructions say to do make; make install, I copied the binary manually.
Copying these results to the list as requested but is that really necessary for everyone? Could you summarise the results for us all when you've got enough please?
Mark
From: Vishwanath Sripathy <vishwanath.sripathy@linaro.org>
To: "linaro-dev@lists.linaro.org" <linaro-dev@lists.linaro.org>
Sent: Tue, 16
November, 2010 13:07:46
Subject: Re: cpufreq-bench test on X86 platforms
Hi All,
tarball with cpufreqbench and readme is available at
http://people.linaro.org/~amitk/cpufreq.tgzVishwanath
On Tue, Nov 16, 2010 at 3:37 PM, Sripathy, Vishwanath
<
vishwanath.bs@ti.com> wrote:
> All,
>
>
>
> I am trying to investigate ondemand governor’s limitation in Linux kernel.
> As part of that, I have found a tool called cpufreq-bench which can be used
> to determine the performance degradation due to ondemand governor compared
> to performance governor.
>
>
>
> I have used this tool on OMAP platforms and able to see the issue. Now I
> would like
to demonstrate this issue on x86 platform to conclude that it’s a
> generic governor problem and nothing specific to ARM based SOCs.
>
>
>
> I would need some of your help to run this test bench on some of recent X86
> platforms that have support for many P states. (My PC is little old which
> has only 2 p-states (2.8GHz & 3.4 GHz), so performance degradation is not
> much visible).
>
>
>
> More details on the tool and test procedure can be found at
>
>
https://blueprints.edge.launchpad.net/linaro-pm-wg/+spec/cpufreq-ondemand-governor>
>
>
> Pls ping me if you need any assistance in testing.
>
> Looking forward for your test results.
>
>
>
> Regards
>
>
Vishwanath
>
>
>
> _______________________________________________
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>
linaro-dev@lists.linaro.org>
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>
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