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perf tools: Add cpu_map processor socket level functions

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This patch adds:
- cpu_map__get_socket: get socked id from cpu
- cpu_map__build_socket_map: build socket map
- cpu_map__socket: gets acutal socket from logical socket

Those functions are used by uncore and processor socket-level
aggregation modes.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1360161962-9675-2-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stephane Eranian 2013-02-06 15:46:01 +01:00 committed by Arnaldo Carvalho de Melo
parent 0479b8b9cf
commit 5ac59a8a77
2 changed files with 63 additions and 0 deletions
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54
tools/perf/util/cpumap.c
View file

@ -1,4 +1,5 @@
#include "util.h"
#include "sysfs.h"
#include "../perf.h"
#include "cpumap.h"
#include <assert.h>
@ -201,3 +202,56 @@ void cpu_map__delete(struct cpu_map *map)
{
free(map);
}
int cpu_map__get_socket(struct cpu_map *map, int idx)
{
FILE *fp;
const char *mnt;
char path[PATH_MAX];
int cpu, ret;
if (idx > map->nr)
return -1;
cpu = map->map[idx];
mnt = sysfs_find_mountpoint();
if (!mnt)
return -1;
sprintf(path,
"%s/devices/system/cpu/cpu%d/topology/physical_package_id",
mnt, cpu);
fp = fopen(path, "r");
if (!fp)
return -1;
ret = fscanf(fp, "%d", &cpu);
fclose(fp);
return ret == 1 ? cpu : -1;
}
int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp)
{
struct cpu_map *sock;
int nr = cpus->nr;
int cpu, s1, s2;
sock = calloc(1, sizeof(*sock) + nr * sizeof(int));
if (!sock)
return -1;
for (cpu = 0; cpu < nr; cpu++) {
s1 = cpu_map__get_socket(cpus, cpu);
for (s2 = 0; s2 < sock->nr; s2++) {
if (s1 == sock->map[s2])
break;
}
if (s2 == sock->nr) {
sock->map[sock->nr] = s1;
sock->nr++;
}
}
*sockp = sock;
return 0;
}

9
tools/perf/util/cpumap.h
View file

@ -14,6 +14,15 @@ struct cpu_map *cpu_map__dummy_new(void);
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);
int cpu_map__get_socket(struct cpu_map *map, int idx);
int cpu_map__build_socket_map(struct cpu_map *cpus, struct cpu_map **sockp);
static inline int cpu_map__socket(struct cpu_map *sock, int s)
{
if (!sock || s > sock->nr || s < 0)
return 0;
return sock->map[s];
}
static inline int cpu_map__nr(const struct cpu_map *map)
{