Messages in this thread Patch in this message |  | | From | Stephane Eranian <> | Subject | [PATCH 1/2] perf tools: add cpu_map processor socket level functions | Date | Wed, 6 Feb 2013 15:46:01 +0100 |
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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> --- tools/perf/util/cpumap.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/cpumap.h | 9 ++++++++ 2 files changed, 63 insertions(+)
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index 2b32ffa..f817046 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -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; +} diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h index 2f68a3b..161b007 100644 --- a/tools/perf/util/cpumap.h +++ b/tools/perf/util/cpumap.h @@ -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) { -- 1.7.9.5
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