| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 |
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| 6 | import perf
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| 7 |
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| 8 | def change_proctitle():
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| 9 | try:
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| 10 | import setproctitle
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| 11 | setproctitle.setproctitle("tracepoint.py")
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| 12 | except:
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| 13 | print("Install the setproctitle python package to help with top and friends")
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| 14 |
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| 15 | def main():
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| 16 | change_proctitle()
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| 17 | cpus = perf.cpu_map()
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| 18 | threads = perf.thread_map(-1)
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| 19 | evlist = perf.parse_events("sched:sched_switch", cpus, threads)
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| 20 | |
| 21 | for ev in evlist:
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| 22 | ev.tracking = False
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| 23 | |
| 24 | evlist.config()
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| 25 | |
| 26 | for ev in evlist:
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| 27 | ev.sample_type = ev.sample_type & ~perf.SAMPLE_IP
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| 28 | ev.read_format = 0
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| 29 |
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| 30 | evlist.open()
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| 31 | evlist.mmap()
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| 32 | evlist.enable();
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| 33 |
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| 34 | while True:
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| 35 | evlist.poll(timeout = -1)
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| 36 | for cpu in cpus:
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| 37 | event = evlist.read_on_cpu(cpu)
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| 38 | if not event:
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| 39 | continue
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| 40 |
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| 41 | if not isinstance(event, perf.sample_event):
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| 42 | continue
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| 43 |
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| 44 | print("time %u prev_comm=%s prev_pid=%d prev_prio=%d prev_state=0x%x ==> next_comm=%s next_pid=%d next_prio=%d" % (
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| 45 | event.sample_time,
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| 46 | event.prev_comm,
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| 47 | event.prev_pid,
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| 48 | event.prev_prio,
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| 49 | event.prev_state,
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| 50 | event.next_comm,
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| 51 | event.next_pid,
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| 52 | event.next_prio))
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| 53 |
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| 54 | if __name__ == '__main__':
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| 55 | main()
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