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