1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/tools/perf/python/twatch.py b/kernel/tools/perf/python/twatch.py
new file mode 100755
index 000000000..2225162ee
--- /dev/null
+++ b/kernel/tools/perf/python/twatch.py
@@ -0,0 +1,41 @@
+#! /usr/bin/python
+# -*- python -*-
+# -*- coding: utf-8 -*-
+#   twatch - Experimental use of the perf python interface
+#   Copyright (C) 2011 Arnaldo Carvalho de Melo <acme@redhat.com>
+#
+#   This application is free software; you can redistribute it and/or
+#   modify it under the terms of the GNU General Public License
+#   as published by the Free Software Foundation; version 2.
+#
+#   This application is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#   General Public License for more details.
+
+import perf
+
+def main():
+	cpus = perf.cpu_map()
+	threads = perf.thread_map()
+	evsel = perf.evsel(task = 1, comm = 1, mmap = 0,
+			   wakeup_events = 1, watermark = 1,
+			   sample_id_all = 1,
+			   sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)
+	evsel.open(cpus = cpus, threads = threads);
+	evlist = perf.evlist(cpus, threads)
+	evlist.add(evsel)
+	evlist.mmap()
+	while True:
+		evlist.poll(timeout = -1)
+		for cpu in cpus:
+			event = evlist.read_on_cpu(cpu)
+			if not event:
+				continue
+			print "cpu: %2d, pid: %4d, tid: %4d" % (event.sample_cpu,
+								event.sample_pid,
+								event.sample_tid),
+			print event
+
+if __name__ == '__main__':
+    main()