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7e2ed09753
So that we don't have to pass it around to the several methods that needs it, simplifying usage. There is one case where we don't have the thread/cpu map in advance, which is in the parsing routines used by top, stat, record, that we have to wait till all options are parsed to know if a cpu or thread list was passed to then create those maps. For that case consolidate the cpu and thread map creation via perf_evlist__create_maps() out of the code in top and record, while also providing a perf_evlist__set_maps() for cases where multiple evlists share maps or for when maps that represent CPU sockets, for instance, get crafted out of topology information or subsets of threads in a particular application are to be monitored, providing more granularity in specifying which cpus and threads to monitor. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
41 lines
1.3 KiB
Python
Executable file
41 lines
1.3 KiB
Python
Executable file
#! /usr/bin/python
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# -*- python -*-
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# -*- coding: utf-8 -*-
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# twatch - Experimental use of the perf python interface
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# Copyright (C) 2011 Arnaldo Carvalho de Melo <acme@redhat.com>
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#
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# This application is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; version 2.
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#
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# This application is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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import perf
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def main():
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cpus = perf.cpu_map()
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threads = perf.thread_map()
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evsel = perf.evsel(task = 1, comm = 1, mmap = 0,
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wakeup_events = 1, sample_period = 1,
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sample_id_all = 1,
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sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU | perf.SAMPLE_TID)
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evsel.open(cpus = cpus, threads = threads);
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evlist = perf.evlist(cpus, threads)
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evlist.add(evsel)
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evlist.mmap()
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while True:
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evlist.poll(timeout = -1)
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for cpu in cpus:
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event = evlist.read_on_cpu(cpu)
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if not event:
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continue
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print "cpu: %2d, pid: %4d, tid: %4d" % (event.sample_cpu,
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event.sample_pid,
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event.sample_tid),
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print event
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if __name__ == '__main__':
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main()
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