libbpf-tools/syscount: use atomic_add for counter

Signed-off-by: Wei Fu <[email protected]>
devopsleague · Sep 8, 2021 · 65d7839 · 65d7839
1 parent 6677321
commit 65d7839
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/libbpf-tools/syscount.bpf.c b/libbpf-tools/syscount.bpf.c
@@ -91,11 +91,11 @@ int sys_exit(struct trace_event_raw_sys_exit *args)
  key = (count_by_process) ? pid : args->id;
  val = bpf_map_lookup_or_try_init(&data, &key, &zero);
  if (val) {
- val->count++;
+ __sync_fetch_and_add(&val->count, 1);
  if (count_by_process)
  save_proc_name(val);
  if (measure_latency)
- val->total_ns += bpf_ktime_get_ns() - *start_ts;
+ __sync_fetch_and_add(&val->total_ns, bpf_ktime_get_ns() - *start_ts);
  }
  return 0;
 }