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877108e4 ACM |
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 | ||
16 | import perf | |
17 | ||
18 | def 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, sample_period = 1, | |
23 | sample_id_all = 1, | |
24 | sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU | perf.SAMPLE_TID) | |
25 | evsel.open(cpus = cpus, threads = threads); | |
7e2ed097 | 26 | evlist = perf.evlist(cpus, threads) |
877108e4 | 27 | evlist.add(evsel) |
7e2ed097 | 28 | evlist.mmap() |
877108e4 ACM |
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 | ||
40 | if __name__ == '__main__': | |
41 | main() |