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perf stat: Cache aggregated map entries in extra cpumap

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Currently any time we need to access socket or core id for given cpu, we
access the sysfs topology file.

Adding a cpus_aggr_map cpu_map to cache those entries.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2015-10-25 15:51:18 +01:00 committed by Arnaldo Carvalho de Melo
parent 2322f573f8
commit 1e5a29318b
1 changed files with 55 additions and 4 deletions
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59
tools/perf/builtin-stat.c
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@ -100,6 +100,8 @@ static struct target target = {
.uid = UINT_MAX,
};
typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
static int run_count = 1;
static bool no_inherit = false;
static volatile pid_t child_pid = -1;
@ -119,7 +121,7 @@ static unsigned int unit_width = 4; /* strlen("unit") */
static bool forever = false;
static struct timespec ref_time;
static struct cpu_map *aggr_map;
static int (*aggr_get_id)(struct cpu_map *m, int cpu);
static aggr_get_id_t aggr_get_id;
static volatile int done = 0;
@ -954,22 +956,63 @@ static int perf_stat__get_core(struct cpu_map *map, int cpu)
return cpu_map__get_core(map, cpu, NULL);
}
static int cpu_map__get_max(struct cpu_map *map)
{
int i, max = -1;
for (i = 0; i < map->nr; i++) {
if (map->map[i] > max)
max = map->map[i];
}
return max;
}
static struct cpu_map *cpus_aggr_map;
static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
{
int cpu;
if (idx >= map->nr)
return -1;
cpu = map->map[idx];
if (cpus_aggr_map->map[cpu] == -1)
cpus_aggr_map->map[cpu] = get_id(map, idx);
return cpus_aggr_map->map[cpu];
}
static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
{
return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
}
static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
{
return perf_stat__get_aggr(perf_stat__get_core, map, idx);
}
static int perf_stat_init_aggr_mode(void)
{
int nr;
switch (stat_config.aggr_mode) {
case AGGR_SOCKET:
if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
perror("cannot build socket map");
return -1;
}
aggr_get_id = perf_stat__get_socket;
aggr_get_id = perf_stat__get_socket_cached;
break;
case AGGR_CORE:
if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
perror("cannot build core map");
return -1;
}
aggr_get_id = perf_stat__get_core;
aggr_get_id = perf_stat__get_core_cached;
break;
case AGGR_NONE:
case AGGR_GLOBAL:
@ -978,7 +1021,15 @@ static int perf_stat_init_aggr_mode(void)
default:
break;
}
return 0;
/*
* The evsel_list->cpus is the base we operate on,
* taking the highest cpu number to be the size of
* the aggregation translate cpumap.
*/
nr = cpu_map__get_max(evsel_list->cpus);
cpus_aggr_map = cpu_map__empty_new(nr + 1);
return cpus_aggr_map ? 0 : -ENOMEM;
}
/*