#! /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()