diff --git a/[refs] b/[refs]
index 3003d0b9a34e..d7773084e84c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d30d4a080d195892091ad7d014fc9293cc08ea0f
+refs/heads/master: cfeb1d90a1b1db96383b48888cb7a5f10ca12e12
diff --git a/trunk/tools/perf/python/twatch.py b/trunk/tools/perf/python/twatch.py
index df638c438a9f..b11cca584238 100755
--- a/trunk/tools/perf/python/twatch.py
+++ b/trunk/tools/perf/python/twatch.py
@@ -19,7 +19,7 @@ def main():
 	cpus = perf.cpu_map()
 	threads = perf.thread_map()
 	evsel = perf.evsel(task = 1, comm = 1, mmap = 0,
-			   wakeup_events = 1, sample_period = 1,
+			   wakeup_events = 1, watermark = 1,
 			   sample_id_all = 1,
 			   sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU | perf.SAMPLE_TID)
 	evsel.open(cpus = cpus, threads = threads);