On Fri, Mar 15, 2013 at 11:54 AM, Chao Xie xiechao.mail@gmail.com wrote:

hi It may be a old topic. Now the cpufreq governors will sample for system work load. The schduler knows about the current workload of each cores. So why not make use of it? The sampling need take some time, so when the cpufreq increase the frequency , the system has been busy for a period of time. Making use of the schduler information can reduce time spending at sampling.

Hi Chao,

I am working for Linaro Power Management Working Group and we know about this problem or solution. We have a dedicated blueprint towards this goal:

https://blueprints.launchpad.net/linaro-big-little-system/+spec/sched-cooper...

-- viresh