Re: RFC: revert request for cpuidle patches e11538d1 and 69a37bea

From: Len Brown
Date: Sat Jul 27 2013 - 02:23:01 EST

>> OK, I'll queue up the reverts as fixes for 3.11-rc4.
> So, the reverts are on the fixes-next branch of the linux-pm.git tree that you
> can access at
> However, they are not simple reverts as we've had some non-trivial changes on
> top of those commits already, so I'd appreciate it a lot if somebody could
> double check if I didn't break anything in them.

I've verified that the reverts improve netperf TCP_RR performance.

Here I've got two Xeon's, slightly different, so I run in both directions.
Also I run two ways -- Out-of-the-box, plus with cpufreq
set to max frequency. The reverts improve all 4 cases:


3.11.0-rc2 baseline w/o revert Out of Box

20420 19963
20658 19915
20298 20320

3.11.0-rc2 baseline w/o revert max freq

59658 51427
59663 51503
59416 51343

3.11.0-rc2-00002-g74bce39 Linux-pm âfixes-nextâ branch

3.11.0-rc2-00002-g74bce39 Out of box
23227 22056
23306 22125
23387 40226 40k result saw some 2.2 ghz
vs 1.2 ghz in other runs

3.11.0-rc2-00002-g74bce39 Max-freq
67240 57645
64880 56764
65924 57435

Tested-by: Len Brown <len.brown@xxxxxxxxx>

Len Brown, Intel Open Source Technology Center
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