linux-kernel - Re: [PATCH v4 4/4] perf test: Add selftest to test IBS invocation via core pmu events

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Date:   Mon, 15 May 2023 18:31:18 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ravi Bangoria <ravi.bangoria@....com>, namhyung@...nel.org,
        eranian@...gle.com, mark.rutland@....com, jolsa@...nel.org,
        irogers@...gle.com, bp@...en8.de, kan.liang@...ux.intel.com,
        adrian.hunter@...el.com, maddy@...ux.ibm.com, x86@...nel.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        sandipan.das@....com, ananth.narayan@....com,
        santosh.shukla@....com
Subject: Re: [PATCH v4 4/4] perf test: Add selftest to test IBS invocation
 via core pmu events

Em Fri, May 05, 2023 at 11:16:48AM +0200, Peter Zijlstra escreveu:
> On Thu, May 04, 2023 at 04:30:03PM +0530, Ravi Bangoria wrote:
> > IBS pmu can be invoked via fixed set of core pmu events with 'precise_ip'
> > set to 1. Add a simple event open test for all these events.
> > 
> > Without kernel fix:
> >   $ sudo ./perf test -vv 76
> >    76: AMD IBS via core pmu                                      :
> >   --- start ---
> >   test child forked, pid 6553
> >   Using CPUID AuthenticAMD-25-1-1
> >   type: 0x0, config: 0x0, fd: 3  -  Pass
> >   type: 0x0, config: 0x1, fd: -1  -  Pass
> >   type: 0x4, config: 0x76, fd: -1  -  Fail
> >   type: 0x4, config: 0xc1, fd: -1  -  Fail
> >   type: 0x4, config: 0x12, fd: -1  -  Pass
> >   test child finished with -1
> >   ---- end ----
> >   AMD IBS via core pmu: FAILED!
> > 
> > With kernel fix:
> >   $ sudo ./perf test -vv 76
> >    76: AMD IBS via core pmu                                      :
> >   --- start ---
> >   test child forked, pid 7526
> >   Using CPUID AuthenticAMD-25-1-1
> >   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
> >   test child finished with 0
> >   ---- end ----
> >   AMD IBS via core pmu: Ok
> > 
> > Signed-off-by: Ravi Bangoria <ravi.bangoria@....com>
> > ---
> >  tools/perf/arch/x86/include/arch-tests.h      |  1 +
> >  tools/perf/arch/x86/tests/Build               |  1 +
> >  .../arch/x86/tests/amd-ibs-via-core-pmu.c     | 71 +++++++++++++++++++
> >  tools/perf/arch/x86/tests/arch-tests.c        |  2 +
> >  4 files changed, 75 insertions(+)
> >  create mode 100644 tools/perf/arch/x86/tests/amd-ibs-via-core-pmu.c
> 
> Arnaldo, ok if I merge this along with the other patches or would you
> rather take it?

That would be ok, checking if you merged already...

- Arnaldo