cpus = perf.cpu_map()

threads = perf.thread_map(thread)

evsel = perf.evsel(type = perf.TYPE_SOFTWARE,

config = perf.COUNT_SW_DUMMY,

task = 1, comm = 1, mmap = 0, freq = 0,

wakeup_events = 1, watermark = 1,

sample_id_all = 1, context_switch = context_switch,

sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)

"""What we want are just the PERF_RECORD_ lifetime events for threads,

evsel.open(cpus = cpus, threads = threads);

evlist = perf.evlist(cpus, threads)

evlist.add(evsel)

evlist.mmap()

while True:

evlist.poll(timeout = -1)

for cpu in cpus:

event = evlist.read_on_cpu(cpu)

if not event:

continue

print("cpu: {0}, pid: {1}, tid: {2} {3}".format(event.sample_cpu,

event.sample_pid,

event.sample_tid,