linux-kernel - Re: [RFC PATCH v3 0/3] x86/perf/amd: AMD PMC counters and NMI latency

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Date:   Tue, 2 Apr 2019 17:13:15 -0400 (EDT)
From:   Vince Weaver <vince@...ter.net>
To:     Cyrill Gorcunov <gorcunov@...il.com>
cc:     Peter Zijlstra <peterz@...radead.org>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jiri Olsa <jolsa@...hat.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [RFC PATCH v3 0/3] x86/perf/amd: AMD PMC counters and NMI
 latency

On Tue, 2 Apr 2019, Cyrill Gorcunov wrote:

> You know, running fuzzer on p4 might worth in anycase. As to potential
> problems to fix -- i could try find some time slot for, still quite
> limited too 'cause of many other duties :(

Well I fired up the Pentium 4
	/dev/sda1 has gone 1457 days without being checked

and eventually got it up to date (running "git pull" in a 5-year old Linux 
tree plus running "apt-get dist-upgrade" at the same time was maybe a 
mistake on a system with 1GB of RAM).

Anyway I have it fuzzing current git and surprisingly while it's hit a few 
WARNINGs and some NMI dazed+confused messages it hasn't actually crashed 
yet.  Not sure if I want to let it fuzz overnight if I'm not here though.

Shame on Intel though for not providing perf JSON files for the 
Pentium 4 event names.

Vince