From: Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>
To: James Clark <James.Clark@arm.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"acme@kernel.org" <acme@kernel.org>,
Mark Rutland <Mark.Rutland@arm.com>,
"alexander.shishkin@linux.intel.com"
<alexander.shishkin@linux.intel.com>,
"jolsa@redhat.com" <jolsa@redhat.com>,
"namhyung@kernel.org" <namhyung@kernel.org>
Cc: "linux-perf-users@vger.kernel.org"
<linux-perf-users@vger.kernel.org>,
"leo.yan@linaro.com" <leo.yan@linaro.com>,
Suzuki Poulose <Suzuki.Poulose@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 1/1] perf/core: Wake up parent event if inherited event has no ring buffer
Date: Mon, 24 Jan 2022 11:37:43 +0000 [thread overview]
Message-ID: <AM9PR08MB60200FA42FAB6DB843718F0A975E9@AM9PR08MB6020.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <20211206113840.130802-2-james.clark@arm.com>
Hi everyone,
I've tried running a benchmark with and without this patch applied, with the following options:
perf record -e arm_spe_0/event_filter=0,jitter=0,ts_enable=1,pa_enable=0,min_latency=0/ ...
repeating it 60 times with and without the patch.
Without the patch, the output perf.data sizes were: 1.0G 1.0G 1.0G 1.0G 1.0G 1.0G 1.0G 1.0G 47M 48M 48M 48M 48M 48M 48M 48M 48M 48M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 49M 60M 60M 60M 60M 61M 61M 61M 61M 61M 61M 61M 62M 62M 62M 62M 62M 62M 62M 62M 62M 63M 63M 63M 65M 990M i.e. 47MB to 1.0GB
With the patch, the output sizes were: 1.4G 1.4G 1.4G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G 1.5G i.e. 1.4GB to 1.5GB.
Tested-by: Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>
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next prev parent reply other threads:[~2022-01-24 11:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 11:38 [RFC PATCH 0/1] perf/core: Wake up parent event if inherited event has no ring buffer James Clark
2021-12-06 11:38 ` [RFC PATCH 1/1] " James Clark
2022-01-24 11:37 ` Ruben Ayrapetyan [this message]
2022-01-24 11:49 ` Peter Zijlstra
2022-01-24 14:58 ` James Clark
2022-01-25 19:12 ` Peter Zijlstra
2022-01-26 16:15 ` James Clark
2022-01-27 11:50 ` [tip: perf/urgent] perf: Always wake the parent event tip-bot2 for James Clark
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