Re: kernel performance update - 2.6.14

[Felix Oxley <lkml@oxley.org>]

Felix Oxley wrote:
> Chen, Kenneth W wrote:
>  > Kernel performance data for 2.6.14 (released yesterday) is updated at:
>  > http://kernel-perf.sourceforge.net
>  >
>  > As expected, results are within run variation compares to 2.6.14-rc5.
>  > No significant deviation found compare to 2.6.14-rc5
>  >
>
> There seems to be some regression here:
>
> System: 4P Xeon
> Test:Result Group 8
> Metric: 64KB_4_fread
> Result:      +1.9%         -15%
> Kernel: 2.6.14-rc4 vs 2.6.14-rc4-git4
>
> System: 2P Xeon
> Test:Result Group 7
> Metric: ODIRECT
> Kernel: 2.6.14-rc5 vs 2.6.14-rc5-git3
> Summary: Write has increased whereas Read has decreased by 4-5 %

Something went horribly wrong with this test between 2.6.13 and 
2.6.13-git2 (it has never recovered):

System: 4P Itanium
Test:Result Group 1
Metric: VolcanoMark
Result:      -3%         -10%
Kernel: 2.6.13 vs 2.6.13-git2

Does anybody know the cause of this?

regards,
Felix
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