linux-kernel - Re: [PATCH v1 5/8] perf test: Tag parallel failing shell tests with "(exclusive)"

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Message-ID: <c32f8c46-3895-49e0-a837-98859345039b@linaro.org>
Date: Fri, 11 Oct 2024 11:01:20 +0100
From: James Clark <james.clark@...aro.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 Kan Liang <kan.liang@...ux.intel.com>, Howard Chu <howardchu95@...il.com>,
 Athira Jajeev <atrajeev@...ux.vnet.ibm.com>,
 Michael Petlan <mpetlan@...hat.com>, Veronika Molnarova
 <vmolnaro@...hat.com>, Dapeng Mi <dapeng1.mi@...ux.intel.com>,
 Thomas Richter <tmricht@...ux.ibm.com>, Ilya Leoshkevich
 <iii@...ux.ibm.com>, Colin Ian King <colin.i.king@...il.com>,
 Weilin Wang <weilin.wang@...el.com>, Andi Kleen <ak@...ux.intel.com>,
 linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v1 5/8] perf test: Tag parallel failing shell tests with
 "(exclusive)"



On 11/10/2024 8:35 am, Ian Rogers wrote:
> Some shell tests compete for resources and so can't run with other
> tests, tag such tests.  The "(exclusive)" stems from shared/exclusive
> to describe how the tests run as if holding a lock.
> 
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>   tools/perf/tests/shell/perftool-testsuite_report.sh | 2 +-
>   tools/perf/tests/shell/record.sh                    | 2 +-
>   tools/perf/tests/shell/record_lbr.sh                | 2 +-
>   tools/perf/tests/shell/record_offcpu.sh             | 2 +-
>   tools/perf/tests/shell/stat_all_pmu.sh              | 2 +-
>   tools/perf/tests/shell/test_intel_pt.sh             | 2 +-
>   tools/perf/tests/shell/test_stat_intel_tpebs.sh     | 2 +-
>   7 files changed, 7 insertions(+), 7 deletions(-)
> 

The following ones would also need to be marked as exclusive, not sure 
if you can include those here or you want me to send a patch:

  tools/perf/tests/shell/coresight/asm_pure_loop.sh
  tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh
  tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh
  tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh
  tools/perf/tests/shell/coresight/unroll_loop_thread_10.sh
  tools/perf/tests/shell/test_arm_coresight.sh
  tools/perf/tests/shell/test_arm_coresight_disasm.sh
  tools/perf/tests/shell/test_arm_spe.sh

In theory all tests using probes would also need to be exclusive because 
they install and delete probes globally. In practice I don't think I saw 
any failures, whether that's just luck or because of some skips I'm not 
sure.

And this one fails consistently in parallel mode on Arm:

   22: Number of exit events of a simple workload 

     : FAILED!

But it's a C test so I assume there isn't an exclusive mechanism to skip 
it? It doesn't look like it should be affected though, so maybe we could 
leave it failing as a real bug.

Thanks
James