forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.5 KiB
48 lines
1.5 KiB
#! /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()
|
|
|