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authorNeilBrown <neilb@suse.com>2015-09-05 11:07:04 +0200
committerNeilBrown <neilb@suse.com>2015-09-05 11:08:32 +0200
commite89c6fdf9e0eb1b5a03574d4ca73e83eae8deb91 (patch)
treef9df292ed03a5a3c4ddc658ae3646f02a1ffafce /tools/perf/python/twatch.py
parentc3cce6cda162eb2b2960a85d9c8992f4f3be85d0 (diff)
parent1081230b748de8f03f37f80c53dfa89feda9b8de (diff)
Merge linux-block/for-4.3/core into md/for-linux
There were a few conflicts that are fairly easy to resolve. Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'tools/perf/python/twatch.py')
-rwxr-xr-xtools/perf/python/twatch.py12
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/perf/python/twatch.py b/tools/perf/python/twatch.py
index 2225162ee1fc..b9d508336ae6 100755
--- a/tools/perf/python/twatch.py
+++ b/tools/perf/python/twatch.py
@@ -18,10 +18,20 @@ import perf
def main():
cpus = perf.cpu_map()
threads = perf.thread_map()
- evsel = perf.evsel(task = 1, comm = 1, mmap = 0,
+ 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,
sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)
+
+ """What we want are just the PERF_RECORD_ lifetime events for threads,
+ using the default, PERF_TYPE_HARDWARE + PERF_COUNT_HW_CYCLES & freq=1
+ (the default), makes perf reenable irq_vectors:local_timer_entry, when
+ disabling nohz, not good for some use cases where all we want is to get
+ threads comes and goes... So use (perf.TYPE_SOFTWARE, perf_COUNT_SW_DUMMY,
+ freq=0) instead."""
+
evsel.open(cpus = cpus, threads = threads);
evlist = perf.evlist(cpus, threads)
evlist.add(evsel)