From: Hagen Paul Pfeifer <hagen@jauu.net>
To: linux-kernel@vger.kernel.org
Cc: Hagen Paul Pfeifer <hagen@jauu.net>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH v2] perf script: add min, max to futex-contention
Date: Tue, 22 Sep 2020 22:09:22 +0200 [thread overview]
Message-ID: <20200922200922.1306034-1-hagen@jauu.net> (raw)
In-Reply-To: <20200921201928.799498-2-hagen@jauu.net>
Average is quite informative, but the outliners - especially max - are
also of interest.
Before:
mutex-locker[793299] lock 5637ec61e080 contended 3400 times, 446 avg ns
mutex-locker[793301] lock 5637ec61e080 contended 3563 times, 385 avg ns
mutex-locker[793300] lock 5637ec61e080 contended 3110 times, 1855 avg ns
After:
mutex-locker[795251] lock 55b14e6dd080 contended 3853 times, 1279 avg ns [max: 12270 ns, min 340 ns]
mutex-locker[795253] lock 55b14e6dd080 contended 2911 times, 518 avg ns [max: 51660261 ns, min 347 ns]
mutex-locker[795252] lock 55b14e6dd080 contended 3843 times, 385 avg ns [max: 24323998 ns, min 338 ns]
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
---
v2: nanosecond, not microseconds
tools/perf/scripts/python/futex-contention.py | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/scripts/python/futex-contention.py b/tools/perf/scripts/python/futex-contention.py
index c440f02627dd..7e884d46f920 100644
--- a/tools/perf/scripts/python/futex-contention.py
+++ b/tools/perf/scripts/python/futex-contention.py
@@ -53,5 +53,5 @@ def trace_begin():
def trace_end():
for (tid, lock) in lock_waits:
min, max, avg, count = lock_waits[tid, lock]
- print("%s[%d] lock %x contended %d times, %d avg ns" %
- (process_names[tid], tid, lock, count, avg))
+ print("%s[%d] lock %x contended %d times, %d avg ns [max: %d ns, min %d ns]" %
+ (process_names[tid], tid, lock, count, avg, max, min))
--
2.28.0
next prev parent reply other threads:[~2020-09-22 20:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-21 20:19 [PATCH 1/2] perf script: autopep8 futex-contention Hagen Paul Pfeifer
2020-09-21 20:19 ` [PATCH 2/2] perf script: add min, max to futex-contention Hagen Paul Pfeifer
2020-09-22 20:09 ` Hagen Paul Pfeifer [this message]
2020-09-23 12:31 ` [PATCH v2] " Arnaldo Carvalho de Melo
2020-09-23 12:40 ` Hagen Paul Pfeifer
2020-09-23 14:07 ` Arnaldo Carvalho de Melo
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