Re: [PATCH v3 linux-next] cpufreq: ondemand: Calculate gradient ofCPU load to early increase frequency

From: Stratos Karafotis
Date: Fri Apr 26 2013 - 10:41:28 EST

On 04/09/2013 07:56 PM, Stratos Karafotis wrote:
On 04/05/2013 10:50 PM, Stratos Karafotis wrote:
Hi Viresh,

On 04/04/2013 07:54 AM, Viresh Kumar wrote:
Hi Stratos,

Yes, your results show some improvements. BUT if performance is the
only thing
we were looking for, then we will never use ondemand governor but

I suspect this little increase in performance must have increased
power numbers
too (significantly). So, if you can get numbers in the form of
with and without your patch, it will be great.


I run some more tests. I increased the number of iterations to 100
(from 20).
I also test for counter 1,000,000 (~4200us), 5,000,000 (~10000us),
15,000,000 (~30000us).

This time, I also extracted statistics from cpufreq_stats driver. I
think this will be an
indication for power consumption. Below the results and attached the
program I used for to
get these numbers.

Any comments would be appreciated.



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