Re: [PATCH 0/18] sched: simplified fork, enable load average into LBand power awareness scheduling

[Borislav Petkov]

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.

Also, shouldn't you have the shortest compress times with "performance"?

> 
> On a 2 sockets SNB EP box.
>          powersaving               balance   	         performance
> x = 4    190.995 /149 35          200.6 /129 38          208.561 /135 35
> x = 8    197.969 /108 46          208.885 /103 46        213.96 /108 43
> x = 16   205.163 /76 64           212.144 /91 51         229.287 /97 44

Ditto here, compress times with "performance" are not the shortest. Or
does "performance" mean something else? :-)

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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