From 2322f573f8131da9c6d1fab01fe0a0c2c23aa549 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Sun, 25 Oct 2015 15:51:17 +0100 Subject: [PATCH] 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 Tested-by: Kan Liang Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1445784728-21732-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/cpumap.c | 17 +++++++++++++++++ tools/perf/util/cpumap.h | 1 + 2 files changed, 18 insertions(+) diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index aa6b490..10af1e7 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) { diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h index f1bcd2c..85f7772 100644 --- a/tools/perf/util/cpumap.h +++ b/tools/perf/util/cpumap.h @@ -15,6 +15,7 @@ struct cpu_map { }; struct cpu_map *cpu_map__new(const char *cpu_list); +struct cpu_map *cpu_map__empty_new(int nr); struct cpu_map *cpu_map__dummy_new(void); struct cpu_map *cpu_map__read(FILE *file); size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp); -- 2.7.4