projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9881d7df JO |
1 | #! /usr/bin/python |
| 2 | # -*- python -*- | |
| 3 | # -*- coding: utf-8 -*- | |
| 4 | ||
| 5 | import perf | |
| 6 | ||
| 7 | class tracepoint(perf.evsel): | |
| 8 | def __init__(self, sys, name): | |
| 9 | config = perf.tracepoint(sys, name) | |
| 10 | perf.evsel.__init__(self, | |
| 11 | type = perf.TYPE_TRACEPOINT, | |
| 12 | config = config, | |
| 13 | freq = 0, sample_period = 1, wakeup_events = 1, | |
| 14 | sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU | perf.SAMPLE_RAW | perf.SAMPLE_TIME) | |
| 15 | ||
| 16 | def main(): | |
| 17 | tp = tracepoint("sched", "sched_switch") | |
| 18 | cpus = perf.cpu_map() | |
| 19 | threads = perf.thread_map(-1) | |
| 20 | ||
| 21 | evlist = perf.evlist(cpus, threads) | |
| 22 | evlist.add(tp) | |
| 23 | evlist.open() | |
| 24 | evlist.mmap() | |
| 25 | ||
| 26 | while True: | |
| 27 | evlist.poll(timeout = -1) | |
| 28 | for cpu in cpus: | |
| 29 | event = evlist.read_on_cpu(cpu) | |
| 30 | if not event: | |
| 31 | continue | |
| 32 | ||
| 33 | if not isinstance(event, perf.sample_event): | |
| 34 | continue | |
| 35 | ||
| 36 | 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" % ( | |
| 37 | event.sample_time, | |
| 38 | event.prev_comm, | |
| 39 | event.prev_pid, | |
| 40 | event.prev_prio, | |
| 41 | event.prev_state, | |
| 42 | event.next_comm, | |
| 43 | event.next_pid, | |
| 44 | event.next_prio) | |
| 45 | ||
| 46 | if __name__ == '__main__': | |
| 47 | main() |