lkml.org 
[lkml]   [2022]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v1] Revert "cpufreq: schedutil: Move max CPU capacity to sugov_policy" #forregzbot
From
On 20.11.22 19:07, Thorsten Leemhuis wrote:
> On 10.11.22 20:57, Sam Wu wrote:
>> This reverts commit 6d5afdc97ea71958287364a1f1d07e59ef151b11.
>>
>> On a Pixel 6 device, it is observed that this commit increases
>> latency by approximately 50ms, or 20%, in migrating a task
>> that requires full CPU utilization from a LITTLE CPU to Fmax
>> on a big CPU. Reverting this change restores the latency back
>> to its original baseline value.
>>
>> Fixes: 6d5afdc97ea7 ("cpufreq: schedutil: Move max CPU capacity to sugov_policy")
>> Cc: Lukasz Luba <lukasz.luba@arm.com>
>> Cc: Saravana Kannan <saravanak@google.com>
>> Cc: Isaac J. Manjarres <isaacmanjarres@google.com>
>> Signed-off-by: Sam Wu <wusamuel@google.com>
>
> Thanks for the report. To be sure below issue doesn't fall through the
> cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression
> tracking bot:
>
> #regzbot ^introduced 6d5afdc97ea7
> #regzbot title cpufreq: schedutil: improved latency on Pixel 6
> #regzbot ignore-activity

#regzbot fixed-by: cdcc5ef26b3

\
 
 \ /
  Last update: 2022-11-27 13:07    [W:0.151 / U:1.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site