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perf test shell lbr: Avoid failures with perf event paranoia

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[ Upstream commit 48314d20fe ]

When not running as root and with higher perf event paranoia values
the perf record LBR tests could fail rather than skipping the
problematic tests.

Add the sensitivity to the test and confirm it passes with paranoia
values from -1 to 2.

Committer testing:

Testing with '$ perf test -vv lbr', i.e. as non root, and then comparing
the output shows the mentioned errors before this patch:

  acme@x1:~$ grep -m1 "model name" /proc/cpuinfo
  model name	: 13th Gen Intel(R) Core(TM) i7-1365U
  acme@x1:~$

Before:

 132: perf record LBR tests            : Skip

After:

 132: perf record LBR tests            : Ok

Fixes: 32559b99e0 ("perf test: Add set of perf record LBR tests")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Chun-Tse Shao <ctshao@google.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ian Rogers 2025-08-21 15:18:31 -07:00 • committed by Greg Kroah-Hartman
commit 3fcbe54828
1 changed files with 20 additions and 6 deletions
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