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-rw-r--r--tools/perf/util/evlist.c25
1 files changed, 20 insertions, 5 deletions
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 08cedb643ea6..ed20f4379956 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -230,18 +230,33 @@ void perf_evlist__set_leader(struct perf_evlist *evlist)
}
}
-void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr)
+void perf_event_attr__set_max_precise_ip(struct perf_event_attr *pattr)
{
- attr->precise_ip = 3;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_HARDWARE,
+ .config = PERF_COUNT_HW_CPU_CYCLES,
+ .exclude_kernel = 1,
+ .precise_ip = 3,
+ };
- while (attr->precise_ip != 0) {
- int fd = sys_perf_event_open(attr, 0, -1, -1, 0);
+ event_attr_init(&attr);
+
+ /*
+ * Unnamed union member, not supported as struct member named
+ * initializer in older compilers such as gcc 4.4.7
+ */
+ attr.sample_period = 1;
+
+ while (attr.precise_ip != 0) {
+ int fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
if (fd != -1) {
close(fd);
break;
}
- --attr->precise_ip;
+ --attr.precise_ip;
}
+
+ pattr->precise_ip = attr.precise_ip;
}
int __perf_evlist__add_default(struct perf_evlist *evlist, bool precise)