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Commit 2322f573 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
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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: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarKan 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent af339981

tools/perf/util/cpumap.c

+17 −0
Original line number Diff line number Diff line
@@ -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) {

tools/perf/util/cpumap.h

+1 −0
Original line number Diff line number Diff line
@@ -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);