From f7cffbabf78203e5b67e4b632741d43644a513ba Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Fri, 28 Feb 2025 14:23:08 -0800 Subject: perf python tracepoint: Switch to using parse_events Rather than manually configuring an evsel, switch to using parse_events for greater commonality with the rest of the perf code. Reviewed-by: Howard Chu Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Link: https://lore.kernel.org/r/20250228222308.626803-12-irogers@google.com Signed-off-by: Namhyung Kim --- tools/perf/python/tracepoint.py | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) (limited to 'tools/perf/python') diff --git a/tools/perf/python/tracepoint.py b/tools/perf/python/tracepoint.py index bba68a6d4515..38b2b6d11f64 100755 --- a/tools/perf/python/tracepoint.py +++ b/tools/perf/python/tracepoint.py @@ -5,24 +5,23 @@ 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.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 = perf.evlist(cpus, threads) - evlist.add(tp) evlist.open() evlist.mmap() + evlist.enable(); while True: evlist.poll(timeout = -1) -- cgit v1.2.3 From a570da214819fa2bd26b8edcaf857867f55e60c5 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Wed, 12 Mar 2025 17:31:38 -0300 Subject: perf python tracepoint.py: Change the COMM using setproctitle if available Otherwise when debugging we see just "python" in perf, top, etc. Signed-off-by: Arnaldo Carvalho de Melo Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250312203141.285263-4-acme@kernel.org Signed-off-by: Namhyung Kim --- tools/perf/python/tracepoint.py | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'tools/perf/python') diff --git a/tools/perf/python/tracepoint.py b/tools/perf/python/tracepoint.py index 38b2b6d11f64..15b0c8268996 100755 --- a/tools/perf/python/tracepoint.py +++ b/tools/perf/python/tracepoint.py @@ -5,7 +5,15 @@ 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) -- cgit v1.2.3