Re: [percpu] ace7e70901: aim9.sync_disk_rw.ops_per_sec -2.3% regression

[Dennis Zhou]

On Fri, May 07, 2021 at 10:52:22AM -0700, Roman Gushchin wrote:
> On Fri, May 07, 2021 at 11:06:06AM +0800, Oliver Sang wrote:
> > hi Roman,
> >  
> > On Thu, May 06, 2021 at 12:54:59AM +0000, Roman Gushchin wrote:
> > > Ping
> > 
> > sorry for late.
> > 
> > the new patch makes the performance a little better but still has
> > 1.9% regression comparing to
> > f183324133 ("percpu: implement partial chunk depopulation")
> 
> Hi Oliver!
> 
> Thank you for testing it!
> 
> Btw, can you, please, confirm that the regression is coming specifically
> from ace7e70901 ("percpu: use reclaim threshold instead of running for every page")?
> I do see *some* regression in my setup, but the data is very noisy, so I'm not sure
> I can confirm it.
> 
> Thanks!

Thanks Oliver and Roman. If this is the case, I'll drop the final patch
and just merge up to f183324133 ("percpu: implement partial chunk
depopulation") into for-next as this is v5.14 anyway.

Oliver, is there a way to trigger the kernel test robot for a specific
test?

Thanks,
Dennis