Re: [PATCH v2] perf test: perf stat tests fails on s390

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Thu, Sep 03, 2026 at 11:17:01AM -0700, Ian Rogers wrote:
> On Thu, Sep 3, 2026 at 12:36 AM Thomas Richter <tmricht@linux.ibm.com> wrote:
> >
> > The test case 'perf stat tests' fails on s390 z/VM machines. The
> > root cause is the unsupported CPU measurement facility on z/VM.
> > Therefore the events cycles and instructions do not exist and
> > are unsupported. This cause the subtest
> >   Hide zero events stat test
> > to fail.
> >
> > Output before:
> >  # perf test 116
> >  116: perf stat tests  : FAILED!
> >
> >  === Test Summary ===
> >  Passed main tests : 0
> >  Passed subtests   : 0
> >  Skipped tests     : 0
> >  Failed tests      : 1
> >  List of failed tests:
> >   116: perf stat tests
> >  #
> >
> > Output after:
> >  # ./perf test 116
> >  116: perf stat tests  : Ok
> >
> >  === Test Summary ===
> >  Passed main tests : 1
> >  Passed subtests   : 0
> >  Skipped tests     : 0
> >  Failed tests      : 0
> >  #
> >
> > Fixes: 64724095a33f ("perf stat: Add --hide-zero-events option to suppress zero-count events")
> > Cc: Aaron Tomlin <atomlin@atomlin.com>
> > Cc: Ian Rogers <irogers@google.com>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
> > Reviewed-by: Aaron Tomlin <atomlin@atomlin.com>
> 
> Reviewed-by: Ian Rogers <irogers@google.com>

Thanks, applied to perf-tools-next, for v7.4.

- Arnaldo