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perf tools: Allow handling a NULL cpu_map as meaning "all cpus"

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Or one with cpu_map->map[0] == -1.

Reducing the boilerplate in setting up an evlist by nor requiring a
cpu_map to be created at all.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-rnaqn3dtnsfo1wlbbf3fhx00@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-09-26 12:41:14 -03:00
parent 0b80f8b32f
commit a14bb7a6fd
2 changed files with 17 additions and 6 deletions
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11
tools/perf/util/cpumap.h
View file

@ -2,6 +2,7 @@
#define __PERF_CPUMAP_H
#include <stdio.h>
#include <stdbool.h>
struct cpu_map {
int nr;
@ -14,4 +15,14 @@ void cpu_map__delete(struct cpu_map *map);
struct cpu_map *cpu_map__read(FILE *file);
size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp);
static inline int cpu_map__nr(const struct cpu_map *map)
{
return map ? map->nr : 1;
}
static inline bool cpu_map__all(const struct cpu_map *map)
{
return map ? map->map[0] == -1 : true;
}
#endif /* __PERF_CPUMAP_H */