Re: [cpufreq] 909c0e9cc1: fwq.fwq.med 210.0% improvement

From: Rafael J. Wysocki
Date: Thu Mar 05 2020 - 02:50:05 EST


On 3/5/2020 2:35 AM, kernel test robot wrote:
Greeting,

FYI, we noticed a 210.0% improvement of fwq.fwq.med due to commit:

Well, that sounds impressive. :-)



commit: 909c0e9cc11ba39fa5a660583b25c2431cf54deb ("cpufreq: intel_pstate: Use passive mode by default without HWP")
https://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git intel_pstate-passive

in testcase: fwq
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 48G memory
with following parameters:

nr_task: 100%
samples: 100000ss
iterations: 18x
cpufreq_governor: powersave

The governor should be schedutil, though, unless it is explicitly set to powersave in the test environment.

Is that the case?