49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
|
#! /usr/bin/env python
|
||
|
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
# -*- python -*-
|
||
|
|
# -*- coding: utf-8 -*-
|
||
|
|
|
||
|
|
import perf
|
||
|
|
|
||
|
|
class tracepoint(perf.evsel):
|
||
|
|
def __init__(self, sys, name):
|
||
|
|
config = perf.tracepoint(sys, name)
|
||
|
|
perf.evsel.__init__(self,
|
||
|
|
type = perf.TYPE_TRACEPOINT,
|
||
|
|
config = config,
|
||
|
|
freq = 0, sample_period = 1, wakeup_events = 1,
|
||
|
|
sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU | perf.SAMPLE_RAW | perf.SAMPLE_TIME)
|
||
|
|
|
||
|
|
def main():
|
||
|
|
tp = tracepoint("sched", "sched_switch")
|
||
|
|
cpus = perf.cpu_map()
|
||
|
|
threads = perf.thread_map(-1)
|
||
|
|
|
||
|
|
evlist = perf.evlist(cpus, threads)
|
||
|
|
evlist.add(tp)
|
||
|
|
evlist.open()
|
||
|
|
evlist.mmap()
|
||
|
|
|
||
|
|
while True:
|
||
|
|
evlist.poll(timeout = -1)
|
||
|
|
for cpu in cpus:
|
||
|
|
event = evlist.read_on_cpu(cpu)
|
||
|
|
if not event:
|
||
|
|
continue
|
||
|
|
|
||
|
|
if not isinstance(event, perf.sample_event):
|
||
|
|
continue
|
||
|
|
|
||
|
|
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" % (
|
||
|
|
event.sample_time,
|
||
|
|
event.prev_comm,
|
||
|
|
event.prev_pid,
|
||
|
|
event.prev_prio,
|
||
|
|
event.prev_state,
|
||
|
|
event.next_comm,
|
||
|
|
event.next_pid,
|
||
|
|
event.next_prio))
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
main()
|