linux-kernel - Re: IBS perf test failures on 9950x3d

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Message-ID: <d8e45b04-d746-4af9-a55c-c3e46f8f952c@amd.com>
Date: Mon, 19 May 2025 22:09:21 +0530
From: Ravi Bangoria <ravi.bangoria@....com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
 Adrian Hunter <adrian.hunter@...el.com>, Ian Rogers <irogers@...gle.com>,
 James Clark <james.clark@...aro.org>, Jiri Olsa <jolsa@...nel.org>,
 Kan Liang <kan.liang@...ux.intel.com>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 "linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
 Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: IBS perf test failures on 9950x3d

Hi Namhyung,

>>> If it needs a specific kernel, then the test needs to cope with that,
>>> etc.
>>
>> 1) Bunch of IBS kernel fixes went in recently (v6.15-rc1):
>>
>>    https://lore.kernel.org/r/20250115054438.1021-1-ravi.bangoria@amd.com
>>
>>    Since you are running on 6.14.5-300.fc42.x86_64, the failures are
>>    genuine and indicating that kernel should be fixed.
>>
>>    I'm wondering how would the test cope with the buggy kernel. Or
>>    probably 'perf test' a wrong place to put such selftests?
> 
> Maybe... some kernel internal changes can be tested in the selftest.
> 
> And 'perf test' should work with any kernel versions.  Is the test
> checking any invalid configs?  Probably then it should move to the
> selftest so that it can be tied to the fixed kernels and 'perf test'
> should only use valid configs.

Sure. I'll prepare a patch to move this test from 'perf test' to
tools/testing/selftest/.

Thanks,
Ravi