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perf cpumap: Add checking for reference counter

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For the CPU map merging test, add an extra check for the reference
counter before releasing the last CPU map.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.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>
Link: https://lore.kernel.org/r/20241107125308.41226-4-leo.yan@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Leo Yan 2024-11-07 12:53:08 +00:00 committed by Arnaldo Carvalho de Melo
parent fb953dfa66
commit 9eef3ec920
1 changed files with 9 additions and 0 deletions
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9
tools/perf/tests/cpumap.c
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@ -167,6 +167,15 @@ static int __test__cpu_map_merge(const char *lhs, const char *rhs, int nr, const
cpu_map__snprint(a, buf, sizeof(buf));
TEST_ASSERT_VAL("failed to merge map: bad result", !strcmp(buf, expected));
perf_cpu_map__put(b);
/*
* If 'b' is a superset of 'a', 'a' points to the same map with the
* map 'b'. In this case, the owner 'b' has released the resource above
* but 'a' still keeps the ownership, the reference counter should be 1.
*/
TEST_ASSERT_VAL("unexpected refcnt: bad result",
refcount_read(perf_cpu_map__refcnt(a)) == 1);
perf_cpu_map__put(a);
return 0;
}