1#! /usr/bin/python
2# -*- python -*-
3# -*- coding: utf-8 -*-
4#   twatch - Experimental use of the perf python interface
5#   Copyright (C) 2011 Arnaldo Carvalho de Melo <acme@redhat.com>
6#
7#   This application is free software; you can redistribute it and/or
8#   modify it under the terms of the GNU General Public License
9#   as published by the Free Software Foundation; version 2.
10#
11#   This application is distributed in the hope that it will be useful,
12#   but WITHOUT ANY WARRANTY; without even the implied warranty of
13#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14#   General Public License for more details.
15
16import perf
17
18def main():
19	cpus = perf.cpu_map()
20	threads = perf.thread_map()
21	evsel = perf.evsel(task = 1, comm = 1, mmap = 0,
22			   wakeup_events = 1, watermark = 1,
23			   sample_id_all = 1,
24			   sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)
25	evsel.open(cpus = cpus, threads = threads);
26	evlist = perf.evlist(cpus, threads)
27	evlist.add(evsel)
28	evlist.mmap()
29	while True:
30		evlist.poll(timeout = -1)
31		for cpu in cpus:
32			event = evlist.read_on_cpu(cpu)
33			if not event:
34				continue
35			print "cpu: %2d, pid: %4d, tid: %4d" % (event.sample_cpu,
36								event.sample_pid,
37								event.sample_tid),
38			print event
39
40if __name__ == '__main__':
41    main()
42