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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556#! /usr/bin/env python# SPDX-License-Identifier: GPL-2.0# -*- python -*-# -*- coding: utf-8 -*-
import perf
def change_proctitle(): try: import setproctitle setproctitle.setproctitle("tracepoint.py") except: print("Install the setproctitle python package to help with top and friends")
def main(): change_proctitle() cpus = perf.cpu_map() threads = perf.thread_map(-1) evlist = perf.parse_events("sched:sched_switch", cpus, threads) # Disable tracking of mmaps and similar that are unnecessary. for ev in evlist: ev.tracking = False # Configure evsels with default record options. evlist.config() # Simplify the sample_type and read_format of evsels for ev in evlist: ev.sample_type = ev.sample_type & ~perf.SAMPLE_IP ev.read_format = 0
evlist.open() evlist.mmap() evlist.enable();
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()