linux-kernel - Re: [PATCH v4 4/4] perf test amd ibs: Add sample period unit test

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Message-ID: <aBK0wz2QENx9qQEz@x1>
Date: Wed, 30 Apr 2025 20:39:47 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ravi Bangoria <ravi.bangoria@....com>
Cc: Ingo Molnar <mingo@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Joe Mario <jmario@...hat.com>,
	Stephane Eranian <eranian@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
	"Shukla, Santosh" <santosh.shukla@....com>,
	Ananth Narayan <ananth.narayan@....com>,
	Sandipan Das <sandipan.das@....com>
Subject: Re: [PATCH v4 4/4] perf test amd ibs: Add sample period unit test

On Wed, Apr 30, 2025 at 09:37:22PM +0530, Ravi Bangoria wrote:
> Hi Arnaldo,
> 
> > root@...ber:/home/acme/git/linux# perf test -vvv ibs
> >  73: AMD IBS via core pmu:
> > --- start ---
> > test child forked, pid 10047
> > Using CPUID AuthenticAMD-26-44-0
> > type: 0x0, config: 0x0, fd: 3  -  Pass
> > type: 0x0, config: 0x1, fd: -1  -  Pass
> > type: 0x4, config: 0x76, fd: 3  -  Pass
> > type: 0x4, config: 0xc1, fd: 3  -  Pass
> > type: 0x4, config: 0x12, fd: -1  -  Pass
> > ---- end(0) ----
> >  73: AMD IBS via core pmu                                            : Ok
> > root@...ber:/home/acme/git/linux#
> 
> It picks up both the IBS tests for me. (Is that what you mean?)
> 
>   $ sudo ./perf test ibs
>    73: AMD IBS via core pmu                                            : Ok
>   112: AMD IBS sample period                                           : Ok
> 
>   $ ./perf --version
>   perf version 6.15.rc2.g35db59fa8ea2

Are there two? I probably tested it with just the first patch on your
series applied, lemme see...

The second takes quite a while to finish :)

root@...ber:/# perf test ibs
 73: AMD IBS via core pmu                                            : Ok
112: AMD IBS sample period                                           : Ok
root@...ber:/#


root@...ber:/# perf stat --null perf test 73
 73: AMD IBS via core pmu                                            : Ok

 Performance counter stats for 'perf test 73':

       0.018951061 seconds time elapsed

       0.004640000 seconds user
       0.005627000 seconds sys


root@...ber:/# perf stat --null perf test 112
112: AMD IBS sample period                                           : Ok

 Performance counter stats for 'perf test 112':

      17.888279280 seconds time elapsed

       1.539229000 seconds user
      16.325610000 seconds sys


root@...ber:/#

But yeah, both are passing on this 9950x3d.

- Arnaldo