From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: "André Almeida" <andrealmeid@igalia.com>,
"Darren Hart" <dvhart@infradead.org>,
"Davidlohr Bueso" <dave@stgolabs.net>,
"Ingo Molnar" <mingo@redhat.com>,
"Juri Lelli" <juri.lelli@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Valentin Schneider" <vschneid@redhat.com>,
"Waiman Long" <longman@redhat.com>,
"Liang, Kan" <kan.liang@linux.intel.com>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
"Arnaldo Carvalho de Melo" <acme@kernel.org>,
"Ian Rogers" <irogers@google.com>, "Jiri Olsa" <jolsa@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Namhyung Kim" <namhyung@kernel.org>,
linux-perf-users@vger.kernel.org
Subject: Re: [PATCH v11 19/19] futex: Allow to make the private hash immutable.
Date: Thu, 10 Apr 2025 12:56:28 +0200 [thread overview]
Message-ID: <20250410105628.cLaq6gVO@linutronix.de> (raw)
In-Reply-To: <20250407155742.968816-20-bigeasy@linutronix.de>
On 2025-04-07 17:57:42 [+0200], To linux-kernel@vger.kernel.org wrote:
> - Xeon CPU E5-2650, 2 NUMA nodes, total 32 CPUs:
> - Before the introducing task local hash
> shared Averaged 1.487.148 operations/sec (+- 0,53%), total secs = 10
> private Averaged 2.192.405 operations/sec (+- 0,07%), total secs = 10
>
> - With the series
> shared Averaged 1.326.342 operations/sec (+- 0,41%), total secs = 10
> -b128 Averaged 141.394 operations/sec (+- 1,15%), total secs = 10
> -Ib128 Averaged 851.490 operations/sec (+- 0,67%), total secs = 10
> -b8192 Averaged 131.321 operations/sec (+- 2,13%), total secs = 10
> -Ib8192 Averaged 1.923.077 operations/sec (+- 0,61%), total secs = 10
> 128 is the default allocation of hash buckets.
> 8192 was the previous amount of allocated hash buckets.
>
> - Xeon(R) CPU E7-8890 v3, 4 NUMA nodes, total 144 CPUs:
> - Before the introducing task local hash
> shared Averaged 1.810.936 operations/sec (+- 0,26%), total secs = 20
> private Averaged 2.505.801 operations/sec (+- 0,05%), total secs = 20
>
> - With the series
> shared Averaged 1.589.002 operations/sec (+- 0,25%), total secs = 20
> -b1024 Averaged 42.410 operations/sec (+- 0,20%), total secs = 20
> -Ib1024 Averaged 740.638 operations/sec (+- 1,51%), total secs = 20
> -b65536 Averaged 48.811 operations/sec (+- 1,35%), total secs = 20
> -Ib65536 Averaged 1.963.165 operations/sec (+- 0,18%), total secs = 20
> 1024 is the default allocation of hash buckets.
> 65536 was the previous amount of allocated hash buckets.
On EPYC 7713, 2 NUMA nodes, 256 CPUs:
ops/sec buckets
-t 250 25.393 (+- 1,51%) 1024
-t 250 -b 1024 -I 1.645.327 (+- 0,34%) 1024
-t 250 -b 65536 25.445 (+- 2,41%) 65536
-t 250 -b 65536 -I 1.733.745 (+- 0,36%) 65536
-t 250 -b 0 1.745.242 (+- 0,21%) 32768 * 2
Sebastian
next prev parent reply other threads:[~2025-04-10 10:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250407155742.968816-1-bigeasy@linutronix.de>
2025-04-07 15:57 ` [PATCH v11 17/19] tools headers: Synchronize prctl.h ABI header Sebastian Andrzej Siewior
2025-04-07 15:57 ` [PATCH v11 18/19] tools/perf: Allow to select the number of hash buckets Sebastian Andrzej Siewior
2025-04-07 15:57 ` [PATCH v11 19/19] futex: Allow to make the private hash immutable Sebastian Andrzej Siewior
2025-04-10 10:56 ` Sebastian Andrzej Siewior [this message]
2025-04-10 14:52 ` Shrikanth Hegde
2025-04-10 15:28 ` Sebastian Andrzej Siewior
2025-04-10 15:48 ` Shrikanth Hegde
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