Messages in this thread | | | Date | Tue, 11 Dec 2012 08:03:01 -0800 | From | Arjan van de Ven <> | Subject | Re: [PATCH 0/18] sched: simplified fork, enable load average into LB and power awareness scheduling |
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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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