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-rw-r--r--tools/perf/builtin-top.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 7a871714d44e..d2fc7542e826 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -834,10 +834,16 @@ static void perf_session__mmap_read(struct perf_session *self)
static void start_counters(struct perf_evlist *evlist)
{
- struct perf_evsel *counter;
+ struct perf_evsel *counter, *first;
+
+ first = list_entry(evlist->entries.next, struct perf_evsel, node);
list_for_each_entry(counter, &evlist->entries, node) {
struct perf_event_attr *attr = &counter->attr;
+ struct xyarray *group_fd = NULL;
+
+ if (group && counter != first)
+ group_fd = first->fd;
attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
@@ -860,7 +866,8 @@ static void start_counters(struct perf_evlist *evlist)
attr->inherit = inherit;
try_again:
if (perf_evsel__open(counter, top.evlist->cpus,
- top.evlist->threads, group) < 0) {
+ top.evlist->threads, group,
+ group_fd) < 0) {
int err = errno;
if (err == EPERM || err == EACCES) {