Commit 37be5858 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf cpumap: Add is_dummy() method 



Needed to check if a cpu_map is dummy, i.e. not a cpu map at all, for
pid monitoring scenarios.

This probably needs to move to libperf, but since perf itself is the
first and so far only user, leave it at tools/perf/util/.

Acked-by: default avatarAndi Kleen <andi@firstfloor.org>
Acked-by: default avatarIan Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d3e2bb43

tools/perf/util/cpumap.h

+10 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
#ifndef __PERF_CPUMAP_H

#define __PERF_CPUMAP_H



#include <stdbool.h>

#include <stdio.h>

#include <stdbool.h>

#include <internal/cpumap.h>
@@ -50,6 +51,15 @@ int cpu__setup_cpunode_map(void); 
int cpu__max_node(void);

struct perf_cpu cpu__max_cpu(void);

struct perf_cpu cpu__max_present_cpu(void);



/**

 * cpu_map__is_dummy - Events associated with a pid, rather than a CPU, use a single dummy map with an entry of -1.

 */

static inline bool cpu_map__is_dummy(struct perf_cpu_map *cpus)

{

	return cpus->nr == 1 && cpus->map[0].cpu == -1;

}



/**

 * cpu__get_node - Returns the numa node X as read from

 * /sys/devices/system/node/nodeX for the given CPU.