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libperf cpumap: Add ability to create CPU from a single CPU number 

Add perf_cpu_map__new_int() so that a CPU map can be created from a
single integer.

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Yicong Yang <yangyicong@hisilicon.com>
Link: https://lore.kernel.org/r/20250403194337.40202-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2025-04-03 12:43:34 -07:00 committed by Arnaldo Carvalho de Melo
parent 365e02ddb6
commit 2e7a2f7f3c
2 changed files with 12 additions and 0 deletions
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10
tools/lib/perf/cpumap.c
View File

@ -242,6 +242,16 @@ struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list)
return cpus;
}
struct perf_cpu_map *perf_cpu_map__new_int(int cpu)
{
struct perf_cpu_map *cpus = perf_cpu_map__alloc(1);
if (cpus)
RC_CHK_ACCESS(cpus)->map[0].cpu = cpu;
return cpus;
}
static int __perf_cpu_map__nr(const struct perf_cpu_map *cpus)
{
return RC_CHK_ACCESS(cpus)->nr;

2
tools/lib/perf/include/perf/cpumap.h
View File

@ -37,6 +37,8 @@ LIBPERF_API struct perf_cpu_map *perf_cpu_map__new_online_cpus(void);
* perf_cpu_map__new_online_cpus is returned.
*/
LIBPERF_API struct perf_cpu_map *perf_cpu_map__new(const char *cpu_list);
/** perf_cpu_map__new_int - create a map with the one given cpu. */
LIBPERF_API struct perf_cpu_map *perf_cpu_map__new_int(int cpu);
LIBPERF_API struct perf_cpu_map *perf_cpu_map__get(struct perf_cpu_map *map);
LIBPERF_API int perf_cpu_map__merge(struct perf_cpu_map **orig,
struct perf_cpu_map *other);