linux-kernel - [PATCH v1 11/11] perf python tracepoint: Switch to using parse

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Message-Id: <20250109075108.7651-12-irogers@google.com>
Date: Wed,  8 Jan 2025 23:51:08 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Yicong Yang <yangyicong@...ilicon.com>, 
	James Clark <james.clark@...aro.org>, Howard Chu <howardchu95@...il.com>, 
	"Dr. David Alan Gilbert" <linux@...blig.org>, Levi Yun <yeoreum.yun@....com>, Ze Gao <zegao2021@...il.com>, 
	Weilin Wang <weilin.wang@...el.com>, Xu Yang <xu.yang_2@....com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 11/11] 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.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/python/tracepoint.py | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

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)
-- 
2.47.1.613.gc27f4b7a9f-goog