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| author | Jiri Olsa <jolsa@kernel.org> | 2015-10-25 17:51:17 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-10-27 21:05:36 +0300 |
| commit | 2322f573f8131da9c6d1fab01fe0a0c2c23aa549 (patch) | |
| tree | 2a0a69388800dc7ea334f0922667b3f31d12bdb5 /tools/perf/util/cpumap.c | |
| parent | af3399817428d8adc2c87c91df23fde77dbcdb35 (diff) | |
| download | linux-2322f573f8131da9c6d1fab01fe0a0c2c23aa549.tar.xz | |
perf cpu_map: Add cpu_map__empty_new function
Adding cpu_map__empty_new interface to create empty cpumap with given
size. The cpumap entries are initialized with -1.
It'll be used for caching cpu_map in following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cpumap.c')
| -rw-r--r-- | tools/perf/util/cpumap.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index aa6b490aa471..10af1e7524fb 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -203,6 +203,23 @@ struct cpu_map *cpu_map__dummy_new(void) return cpus; } +struct cpu_map *cpu_map__empty_new(int nr) +{ + struct cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int) * nr); + + if (cpus != NULL) { + int i; + + cpus->nr = nr; + for (i = 0; i < nr; i++) + cpus->map[i] = -1; + + atomic_set(&cpus->refcnt, 1); + } + + return cpus; +} + static void cpu_map__delete(struct cpu_map *map) { if (map) { |