From: Fernand Sieber <sieberf@amazon.com>
To: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: <mingo@redhat.com>, <peterz@infradead.org>,
<linux-kernel@vger.kernel.org>, <juri.lelli@redhat.com>,
<vincent.guittot@linaro.org>, <dietmar.eggemann@arm.com>,
<rostedt@goodmis.org>, <bsegall@google.com>, <mgorman@suse.de>,
<vschneid@redhat.com>, <dwmw@amazon.co.uk>, <jschoenh@amazon.de>,
<liuyuxua@amazon.com>
Subject: Re: [PATCH 4/4] sched/fair: Add more core cookie check in wake up fast path
Date: Thu, 20 Nov 2025 12:30:00 +0200 [thread overview]
Message-ID: <20251120103001.978744-1-sieberf@amazon.com> (raw)
In-Reply-To: <dc37d8bd-66c4-439e-afb3-e01670f3e08c@amd.com>
Hi Prateek,
On 9/24/2025 9:51 AM, K Prateek Nayak wrote:
> Yes, that would be great! Thank you. And also please include some
> benchmark numbers either in improved core utilization or the benchmark
> results actually improving from these changes.
>
> It would be great to know how much things improve by :)
I've run some benchmarking and I've determined most of the perf gains I
observed can be isolated to a subset of the changes in this series.
Therefore I've repackaged it in a single patch, which also considers
other feedback gathered in this series:
https://lore.kernel.org/lkml/20251120101955.968586-1-sieberf@amazon.com/T/#u
I've also included benchmark test results. This current patch series can
be cancelled in favor of the new patch.
--
Thanks,
Fernand
Amazon Development Centre (South Africa) (Proprietary) Limited
29 Gogosoa Street, Observatory, Cape Town, Western Cape, 7925, South Africa
Registration Number: 2004 / 034463 / 07
prev parent reply other threads:[~2025-11-20 10:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-22 12:39 [PATCH 0/4] sched/fair: Core sched wake up path improvements Fernand Sieber
2025-09-22 12:39 ` [PATCH 1/4] sched/fair: Fix cookie check on __select_idle_cpu() Fernand Sieber
2025-09-23 8:42 ` K Prateek Nayak
2025-09-25 6:35 ` Madadi Vineeth Reddy
2025-09-22 12:39 ` [PATCH 2/4] sched/fair: Still look for the idlest cpu with no matching cookie Fernand Sieber
2025-09-23 1:51 ` K Prateek Nayak
2025-09-23 7:32 ` Fernand Sieber
2025-09-23 7:44 ` Fernand Sieber
2025-09-22 12:39 ` [PATCH 3/4] sched/fair: Add cookie checks on wake idle path Fernand Sieber
2025-09-22 12:39 ` [PATCH 4/4] sched/fair: Add more core cookie check in wake up fast path Fernand Sieber
2025-09-23 8:55 ` K Prateek Nayak
2025-09-23 9:30 ` Fernand Sieber
2025-09-24 4:21 ` K Prateek Nayak
2025-11-05 15:34 ` [PATCH 4/4] sched/fair: Add more core cookie check in wake up Fernand Sieber
2025-11-20 10:30 ` Fernand Sieber [this message]
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