diff options
| -rw-r--r-- | tools/perf/util/bpf_skel/lock_contention.bpf.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/util/bpf_skel/lock_contention.bpf.c index 4b7237e178bd..52a876b42699 100644 --- a/tools/perf/util/bpf_skel/lock_contention.bpf.c +++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c @@ -491,6 +491,12 @@ int contention_end(u64 *ctx) err = bpf_map_update_elem(&lock_stat, &key, &first, BPF_NOEXIST); if (err < 0) { + if (err == -EEXIST) { + /* it lost the race, try to get it again */ + data = bpf_map_lookup_elem(&lock_stat, &key); + if (data != NULL) + goto found; + } if (err == -E2BIG) data_map_full = 1; __sync_fetch_and_add(&data_fail, 1); @@ -498,6 +504,7 @@ int contention_end(u64 *ctx) goto out; } +found: __sync_fetch_and_add(&data->total_time, duration); __sync_fetch_and_add(&data->count, 1); |