diff options
| -rw-r--r-- | tools/perf/builtin-stat.c | 4 | ||||
| -rw-r--r-- | tools/perf/builtin-test.c | 4 | ||||
| -rw-r--r-- | tools/perf/util/evsel.c | 27 | ||||
| -rw-r--r-- | tools/perf/util/evsel.h | 10 |
4 files changed, 27 insertions, 18 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index da9090245934..b5fe522f11dc 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -169,7 +169,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel) PERF_FORMAT_TOTAL_TIME_RUNNING; if (system_wide) - return perf_evsel__open_per_cpu(evsel, cpus); + return perf_evsel__open_per_cpu(evsel, cpus, false); attr->inherit = !no_inherit; if (target_pid == -1 && target_tid == -1) { @@ -177,7 +177,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel) attr->enable_on_exec = 1; } - return perf_evsel__open_per_thread(evsel, threads); + return perf_evsel__open_per_thread(evsel, threads, false); } /* diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c index 5dcdba653d70..4282d671b161 100644 --- a/tools/perf/builtin-test.c +++ b/tools/perf/builtin-test.c @@ -289,7 +289,7 @@ static int test__open_syscall_event(void) goto out_thread_map_delete; } - if (perf_evsel__open_per_thread(evsel, threads) < 0) { + if (perf_evsel__open_per_thread(evsel, threads, false) < 0) { pr_debug("failed to open counter: %s, " "tweak /proc/sys/kernel/perf_event_paranoid?\n", strerror(errno)); @@ -364,7 +364,7 @@ static int test__open_syscall_event_on_all_cpus(void) goto out_thread_map_delete; } - if (perf_evsel__open(evsel, cpus, threads) < 0) { + if (perf_evsel__open(evsel, cpus, threads, false) < 0) { pr_debug("failed to open counter: %s, " "tweak /proc/sys/kernel/perf_event_paranoid?\n", strerror(errno)); diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index f5cfed60af98..da473ec93c75 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -128,7 +128,7 @@ int __perf_evsel__read(struct perf_evsel *evsel, } static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, - struct thread_map *threads) + struct thread_map *threads, bool group) { int cpu, thread; @@ -137,12 +137,18 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, return -1; for (cpu = 0; cpu < cpus->nr; cpu++) { + int group_fd = -1; + for (thread = 0; thread < threads->nr; thread++) { FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, threads->map[thread], - cpus->map[cpu], -1, 0); + cpus->map[cpu], + group_fd, 0); if (FD(evsel, cpu, thread) < 0) goto out_close; + + if (group && group_fd == -1) + group_fd = FD(evsel, cpu, thread); } } @@ -175,10 +181,9 @@ static struct { .threads = { -1, }, }; -int perf_evsel__open(struct perf_evsel *evsel, - struct cpu_map *cpus, struct thread_map *threads) +int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, + struct thread_map *threads, bool group) { - if (cpus == NULL) { /* Work around old compiler warnings about strict aliasing */ cpus = &empty_cpu_map.map; @@ -187,15 +192,17 @@ int perf_evsel__open(struct perf_evsel *evsel, if (threads == NULL) threads = &empty_thread_map.map; - return __perf_evsel__open(evsel, cpus, threads); + return __perf_evsel__open(evsel, cpus, threads, group); } -int perf_evsel__open_per_cpu(struct perf_evsel *evsel, struct cpu_map *cpus) +int perf_evsel__open_per_cpu(struct perf_evsel *evsel, + struct cpu_map *cpus, bool group) { - return __perf_evsel__open(evsel, cpus, &empty_thread_map.map); + return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group); } -int perf_evsel__open_per_thread(struct perf_evsel *evsel, struct thread_map *threads) +int perf_evsel__open_per_thread(struct perf_evsel *evsel, + struct thread_map *threads, bool group) { - return __perf_evsel__open(evsel, &empty_cpu_map.map, threads); + return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group); } diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index b2d755fe88a5..0962b500cb6d 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -45,10 +45,12 @@ int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus); void perf_evsel__free_fd(struct perf_evsel *evsel); void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads); -int perf_evsel__open_per_cpu(struct perf_evsel *evsel, struct cpu_map *cpus); -int perf_evsel__open_per_thread(struct perf_evsel *evsel, struct thread_map *threads); -int perf_evsel__open(struct perf_evsel *evsel, - struct cpu_map *cpus, struct thread_map *threads); +int perf_evsel__open_per_cpu(struct perf_evsel *evsel, + struct cpu_map *cpus, bool group); +int perf_evsel__open_per_thread(struct perf_evsel *evsel, + struct thread_map *threads, bool group); +int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, + struct thread_map *threads, bool group); #define perf_evsel__match(evsel, t, c) \ (evsel->attr.type == PERF_TYPE_##t && \ |