Commit c3ad8d23 authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
Browse files

perf cpumap: Add is_subset function 



Returns true if the second argument is a subset of the first.

Signed-off-by: default avatarIan Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: John Garry <john.garry@huawei.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20220328232648.2127340-4-irogers@google.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 0df6ade7

tools/lib/perf/cpumap.c

+20 −0
Original line number Diff line number Diff line
@@ -319,6 +319,26 @@ struct perf_cpu perf_cpu_map__max(struct perf_cpu_map *map) 
	return map->nr > 0 ? map->map[map->nr - 1] : result;

}



/** Is 'b' a subset of 'a'. */

bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b)

{

	if (a == b || !b)

		return true;

	if (!a || b->nr > a->nr)

		return false;



	for (int i = 0, j = 0; i < a->nr; i++) {

		if (a->map[i].cpu > b->map[j].cpu)

			return false;

		if (a->map[i].cpu == b->map[j].cpu) {

			j++;

			if (j == b->nr)

				return true;

		}

	}

	return false;

}



/*

 * Merge two cpumaps

 *

tools/lib/perf/include/internal/cpumap.h

+1 −0
Original line number Diff line number Diff line
@@ -25,5 +25,6 @@ struct perf_cpu_map { 
#endif



int perf_cpu_map__idx(const struct perf_cpu_map *cpus, struct perf_cpu cpu);

bool perf_cpu_map__is_subset(const struct perf_cpu_map *a, const struct perf_cpu_map *b);



#endif /* __LIBPERF_INTERNAL_CPUMAP_H */