Re: [PATCH v16 00/22] per memcg lru_lock

[Alex Shi]

å 2020/7/16 äå10:11, Alexander Duyck åé:
>> Thanks for Testing support from Intel 0day and Rong Chen, Fengguang Wu,
>> and Yun Wang. Hugh Dickins also shared his kbuild-swap case. Thanks!
> Hi Alex,
> 
> I think I am seeing a regression with this patch set when I run the
> will-it-scale/page_fault3 test. Specifically the processes result is
> dropping from 56371083 to 43127382 when I apply these patches.
> 
> I haven't had a chance to bisect and figure out what is causing it,
> and wanted to let you know in case you are aware of anything specific
> that may be causing this.


Thanks a lot for the info!

Actually, the patch 17th, and patch 13th may changed performance a little,
like the 17th, intel LKP found vm-scalability.throughput 68.0% improvement,
and stress-ng.remap.ops_per_sec -76.3% regression, or stress-ng.memfd.ops_per_sec
 +23.2%. etc.

This kind performance interference is known and acceptable.
Thanks
Alex