1 #! /usr/bin/env python !! 1 #! /usr/bin/python
2 # SPDX-License-Identifier: GPL-2.0 <<
3 # -*- python -*- 2 # -*- python -*-
4 # -*- coding: utf-8 -*- 3 # -*- coding: utf-8 -*-
5 4
6 import perf 5 import perf
7 6
8 class tracepoint(perf.evsel): 7 class tracepoint(perf.evsel):
9 def __init__(self, sys, name): 8 def __init__(self, sys, name):
10 config = perf.tracepoint(sys, name) 9 config = perf.tracepoint(sys, name)
11 perf.evsel.__init__(self, 10 perf.evsel.__init__(self,
12 type = perf.TYPE 11 type = perf.TYPE_TRACEPOINT,
13 config = config, 12 config = config,
14 freq = 0, sample_p 13 freq = 0, sample_period = 1, wakeup_events = 1,
15 sample_type = perf 14 sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU | perf.SAMPLE_RAW | perf.SAMPLE_TIME)
16 15
17 def main(): 16 def main():
18 tp = tracepoint("sched", "sched_switc 17 tp = tracepoint("sched", "sched_switch")
19 cpus = perf.cpu_map() 18 cpus = perf.cpu_map()
20 threads = perf.thread_map(-1) 19 threads = perf.thread_map(-1)
21 20
22 evlist = perf.evlist(cpus, threads) 21 evlist = perf.evlist(cpus, threads)
23 evlist.add(tp) 22 evlist.add(tp)
24 evlist.open() 23 evlist.open()
25 evlist.mmap() 24 evlist.mmap()
26 25
27 while True: 26 while True:
28 evlist.poll(timeout = -1) 27 evlist.poll(timeout = -1)
29 for cpu in cpus: 28 for cpu in cpus:
30 event = evlist.read_on_cpu(cpu) 29 event = evlist.read_on_cpu(cpu)
31 if not event: 30 if not event:
32 continue 31 continue
33 32
34 if not isinstance(event, perf.samp 33 if not isinstance(event, perf.sample_event):
35 continue 34 continue
36 35
37 print("time %u prev_comm=%s prev_p !! 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" % (
38 event.sample_time, 37 event.sample_time,
39 event.prev_comm, 38 event.prev_comm,
40 event.prev_pid, 39 event.prev_pid,
41 event.prev_prio, 40 event.prev_prio,
42 event.prev_state, 41 event.prev_state,
43 event.next_comm, 42 event.next_comm,
44 event.next_pid, 43 event.next_pid,
45 event.next_prio)) !! 44 event.next_prio)
46 45
47 if __name__ == '__main__': 46 if __name__ == '__main__':
48 main() 47 main()
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