kernel_optimize_test/tools/perf/python/tracepoint.py
Finn Behrens 6ae514b8a8 tweewide: Fix most Shebang lines
commit c25ce589dca10d64dde139ae093abc258a32869c upstream.

Change every shebang which does not need an argument to use /usr/bin/env.
This is needed as not every distro has everything under /usr/bin,
sometimes not even bash.

Signed-off-by: Finn Behrens <me@kloenk.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-22 11:40:55 +02:00

49 lines
1.5 KiB
Python
Executable File

#! /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()