linux-kernel - Re: [linus:master] [mm] cacded5e42: aim9.brk_test.ops_per

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Message-ID: <ZxGtFCzk5kwycFV3@xsang-OptiPlex-9020>
Date: Fri, 18 Oct 2024 08:34:28 +0800
From: Oliver Sang <oliver.sang@...el.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, Mark Brown <broonie@...nel.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka
	<vbabka@...e.cz>, Bert Karwatzki <spasswolf@....de>, Jeff Xu
	<jeffxu@...omium.org>, Jiri Olsa <olsajiri@...il.com>, Kees Cook
	<kees@...nel.org>, Lorenzo Stoakes <lstoakes@...il.com>, Matthew Wilcox
	<willy@...radead.org>, "Paul E. McKenney" <paulmck@...nel.org>, Paul Moore
	<paul@...l-moore.com>, Sidhartha Kumar <sidhartha.kumar@...cle.com>, "Suren
 Baghdasaryan" <surenb@...gle.com>, <linux-mm@...ck.org>,
	<ying.huang@...el.com>, <feng.tang@...el.com>, <fengwei.yin@...el.com>,
	<oliver.sang@...el.com>
Subject: Re: [linus:master] [mm]  cacded5e42:  aim9.brk_test.ops_per_sec
 -5.0% regression

hi, Lorenzo,

On Thu, Oct 17, 2024 at 09:54:13AM +0100, Lorenzo Stoakes wrote:
> On Thu, Oct 17, 2024 at 10:58:38AM +0800, Oliver Sang wrote:

[...]

> 
> Thanks for this. As far as I'm concerned this puts us into noise territory,
> so we'll go with this as the solution!
> 
> A side-note, the brk2 test from the will-it-scale suite, written explicitly
> to be more real-world representative, sees an actual performance
> _improvement_ here (though small).
> 
> So overall I'm comfortable with this, we can revisit if anybody raises any
> objection! The benefit in de-duplicating code is very significant.

thanks a lot for all these informations!

> 
> Thanks for all your help, hugely appreciated!

you are welcome :) just our great pleasure!

> 
> Cheers, Lorenzo
> 
> [snip]