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-rw-r--r--tools/perf/util/evsel.c52
-rw-r--r--tools/perf/util/evsel.h5
2 files changed, 57 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3f5de51..e62cc5e 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1,4 +1,5 @@
#include "evsel.h"
+#include "../perf.h"
#include "util.h"
#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
@@ -121,3 +122,54 @@ int __perf_evsel__read(struct perf_evsel *evsel,
return 0;
}
+
+int perf_evsel__open_per_cpu(struct perf_evsel *evsel, int ncpus, int *cpu_map)
+{
+ int cpu;
+
+ for (cpu = 0; cpu < ncpus; cpu++) {
+ FD(evsel, cpu, 0) = sys_perf_event_open(&evsel->attr, -1,
+ cpu_map[cpu], -1, 0);
+ if (FD(evsel, cpu, 0) < 0)
+ goto out_close;
+ }
+
+ return 0;
+
+out_close:
+ while (--cpu >= 0) {
+ close(FD(evsel, cpu, 0));
+ FD(evsel, cpu, 0) = -1;
+ }
+ return -1;
+}
+
+int perf_evsel__open_per_thread(struct perf_evsel *evsel, int nthreads, int *thread_map)
+{
+ int thread;
+
+ for (thread = 0; thread < nthreads; thread++) {
+ FD(evsel, 0, thread) = sys_perf_event_open(&evsel->attr,
+ thread_map[thread], -1, -1, 0);
+ if (FD(evsel, 0, thread) < 0)
+ goto out_close;
+ }
+
+ return 0;
+
+out_close:
+ while (--thread >= 0) {
+ close(FD(evsel, 0, thread));
+ FD(evsel, 0, thread) = -1;
+ }
+ return -1;
+}
+
+int perf_evsel__open(struct perf_evsel *evsel, int ncpus, int nthreads,
+ int *cpu_map, int *thread_map)
+{
+ if (nthreads < 0)
+ return perf_evsel__open_per_cpu(evsel, ncpus, cpu_map);
+
+ return perf_evsel__open_per_thread(evsel, nthreads, thread_map);
+}
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 8b48ef1..a62fb55 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -42,6 +42,11 @@ 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, int ncpus, int *cpu_map);
+int perf_evsel__open_per_thread(struct perf_evsel *evsel, int nthreads, int *thread_map);
+int perf_evsel__open(struct perf_evsel *evsel, int ncpus, int nthreads,
+ int *cpu_map, int *thread_map);
+
#define perf_evsel__match(evsel, t, c) \
(evsel->attr.type == PERF_TYPE_##t && \
evsel->attr.config == PERF_COUNT_##c)