linux-kernel - Re: [x86/mm/pat] 8d04a5f97a: phoronix-test-suite.glmark2.0.score -23.7% regression

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Date:   Sat, 30 Nov 2019 13:27:29 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Mariusz Ceier <mceier@...il.com>
Cc:     kernel test robot <rong.a.chen@...el.com>,
        Ingo Molnar <mingo@...nel.org>,
        Davidlohr Bueso <dbueso@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: Re: [x86/mm/pat] 8d04a5f97a: phoronix-test-suite.glmark2.0.score
 -23.7% regression

On Sat, 30 Nov 2019, Mariusz Ceier wrote:

>I can also confirm this - just bisected framebuffer rendering
>performance regression on amdgpu and
>8d04a5f97a5fa9d7afdf46eda3a5ceaa973a1bcc is the first bad commit
>(leading to drop from around 260-300fps to about 60fps in CS:GO on
>Fury X).

This is a third report now. Could you please provide the contents
of the following file, before and after the offending commit.

	/sys/kernel/debug/x86/pat_memtype_list

This will show any attribute differences in the tree, which is likely
the culprit.

Thanks,
Davidlohr