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SubjectRe: [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling
On 12/11/2012 7:48 AM, Borislav Petkov wrote:
> On Tue, Dec 11, 2012 at 08:10:20PM +0800, Alex Shi wrote:
>> Another testing of parallel compress with pigz on Linus' git tree.
>> results show we get much better performance/power with powersaving and
>> balance policy:
>>
>> testing command:
>> #pigz -k -c -p$x -r linux* &> /dev/null
>>
>> On a NHM EP box
>> powersaving balance performance
>> x = 4 166.516 /88 68 170.515 /82 71 165.283 /103 58
>> x = 8 173.654 /61 94 177.693 /60 93 172.31 /76 76
>
> This looks funny: so "performance" is eating less watts than
> "powersaving" and "balance" on NHM. Could it be that the average watts
> measurements on NHM are not correct/precise..? On SNB they look as
> expected, according to your scheme.

well... it's not always beneficial to group or to spread out
it depends on cache behavior mostly which is best



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