diff mbox series

perf test: Fix offcpu test prev_state check

Message ID 20230218162724.1292657-1-namhyung@kernel.org
State New
Headers
Series perf test: Fix offcpu test prev_state check |

Commit Message

Namhyung Kim Feb. 18, 2023, 4:27 p.m. UTC 
  On Fedora 36, the perf record offcpu profiling tests are failing.
It was because the BPF checks the prev task's state being S or D
but actually it has more bits set.  Let's check the LSB 8 bits
for the purpose of offcpu profiling.

Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/bpf_skel/off_cpu.bpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/tools/perf/util/bpf_skel/off_cpu.bpf.c b/tools/perf/util/bpf_skel/off_cpu.bpf.c
index 38e3b287dbb2..d877a0a9731f 100644
--- a/tools/perf/util/bpf_skel/off_cpu.bpf.c
+++ b/tools/perf/util/bpf_skel/off_cpu.bpf.c
@@ -277,7 +277,7 @@  int on_switch(u64 *ctx)
 	else
 		prev_state = get_task_state(prev);
 
-	return off_cpu_stat(ctx, prev, next, prev_state);
+	return off_cpu_stat(ctx, prev, next, prev_state & 0xff);
 }
 
 char LICENSE[] SEC("license") = "Dual BSD/GPL";