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From: Aaron Lu <aaron.lu@intel.com>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	<linux-kernel@vger.kernel.org>, Olivier Dion <odion@efficios.com>,
	<michael.christie@oracle.com>
Subject: Re: [RFC PATCH v8] sched: Fix performance regression introduced by mm_cid
Date: Tue, 18 Apr 2023 19:21:51 +0800	[thread overview]
Message-ID: <20230418112151.GA565498@ziqianlu-desk2> (raw)
In-Reply-To: <20230417150831.264780-1-mathieu.desnoyers@efficios.com>

On Mon, Apr 17, 2023 at 11:08:31AM -0400, Mathieu Desnoyers wrote:
> Introduce per-mm/cpu current concurrency id (mm_cid) to fix a PostgreSQL
> sysbench regression reported by Aaron Lu.

For postgres_sysbench on SPR:
sched_mm_cid_migrate_to() is in the range of 0.1x% - 0.4x%, mm_cid_get()
is in the range of 0.1x% - 0.3x%. Other cid functions are pretty minor.

For hackbench on SPR:
ched_mm_cid_migrate_to() is about 3%-4%, mm_cid_get() is about 7%-8%,
other cid functions are pretty minor.

Thanks,
Aaron

  reply	other threads:[~2023-04-18 11:22 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-17 15:08 Mathieu Desnoyers
2023-04-18 11:21 ` Aaron Lu [this message]
2023-04-18 16:01   ` Mathieu Desnoyers
2023-04-18 18:24     ` Mathieu Desnoyers
2023-04-19  8:06     ` Aaron Lu
2023-04-19 13:10       ` Mathieu Desnoyers
2023-04-20  6:00 ` Aaron Lu
2023-04-20 12:38   ` Mathieu Desnoyers

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