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SubjectRe: [RFC PATCH v2] sched: Limit idle_balance()
Hi Json,

With V2 of your patch here are the results for the ebizzy run on
3.11-rc1 + patch on a 1 socket, 16 core powerpc machine. Each ebizzy
run was for 30 seconds.

Number_of_threads %improvement_with_patch
4 8.63
8 1.29
12 9.98
16 20.46

Let me know if you want me to profile any of these runs for specific
statistics.

Regards
Preeti U Murthy


On 07/20/2013 12:58 AM, Jason Low wrote:
> On Fri, 2013-07-19 at 16:54 +0530, Preeti U Murthy wrote:
>> Hi Json,
>>
>> I ran ebizzy and kernbench benchmarks on your 3.11-rc1 + your "V1
>> patch" on a 1 socket, 16 core powerpc machine. I thought I would let you
>> know the results before I try your V2.
>>
>> Ebizzy: 30 seconds run. The table below shows the improvement in the
>> number of records completed. I have not spent enough time on the patch
>> to explain such a big improvement.
>>
>> Number_of_threads %improvement_with_patch
>> 4 41.86%
>> 8 9.8%
>> 12 34.77%
>> 16 28.37%
>>
>> While on kernbench there was no significant change in the observation.
>>
>> I will try patch V2 and let you know the results.
>
> Great to see those improvements so far. Thank you for testing this.
>
> Jason
>



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