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

[Viresh Kumar]

On 9 April 2013 22:26, Stratos Karafotis <stratosk@xxxxxxxxxxxx> 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
>>> performance
>>> governor.
>>>
>>> I suspect this little increase in performance must have increased power
>>> numbers
>>> too (significantly). So, if you can get numbers in the form of
>>> power/performance
>>> with and without your patch, it will be great.
>>>
>>> --
>>> viresh
>>>
>>
>> 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.

Sorry, i forgot about this mail earlier..

Your performance numbers look improved but i am still not sure about
power consumption. But as this is not going to be the default settings, i
think we can take this patch.

@Rafael:?
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