From: K Prateek Nayak <kprateek.nayak@amd.com>
To: Zecheng Li <zli94@ncsu.edu>, Ingo Molnar <mingo@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
"Vincent Guittot" <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
Rik van Riel <riel@surriel.com>, Chris Mason <clm@fb.com>,
Madadi Vineeth Reddy <vineethr@linux.ibm.com>,
Xu Liu <xliuprof@google.com>, Blake Jones <blakejones@google.com>,
Josh Don <joshdon@google.com>,
Nilay Vaish <nilayvaish@google.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v8 0/3] sched/fair: Optimize cfs_rq and sched_entity allocation for better data locality
Date: Thu, 22 Jan 2026 14:33:20 +0530 [thread overview]
Message-ID: <03488c43-2dc4-4ede-a489-b196e1426921@amd.com> (raw)
In-Reply-To: <20260121203402.1008441-1-zli94@ncsu.edu>
Hello Zecheng,
On 1/22/2026 2:03 AM, Zecheng Li wrote:
> Hi all,
>
> This patch series improves CFS cache performance by allocating cfs_rq
> and sched_entity together in the per-cpu allocator. It allows for
> replacing the pointer arrays in task_group with a per-cpu offset.
I tested this with a cgroup stress test and haven't seen any splats.
Feel free to include:
Reviewed-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Peter, I suppose you'll still need this with sched/flat since all
the intermediate sched_entities and cfs_rqs still l remain and
afaict co-locating sched_entity and the group cfs_rq can help since
prefetchers will very likely fetch the other when one of them is
accessed.
--
Thanks and Regards,
Prateek
next prev parent reply other threads:[~2026-01-22 9:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-21 20:33 Zecheng Li
2026-01-21 20:33 ` [PATCH v8 1/3] sched/fair: Co-locate cfs_rq and sched_entity in cfs_tg_state Zecheng Li
2026-01-21 20:33 ` [PATCH v8 2/3] sched/fair: Remove task_group->se pointer array Zecheng Li
2026-01-21 20:33 ` [PATCH v8 3/3] sched/fair: Allocate cfs_tg_state with percpu allocator Zecheng Li
2026-01-22 9:03 ` K Prateek Nayak [this message]
2026-02-04 23:16 ` [PATCH v8 0/3] sched/fair: Optimize cfs_rq and sched_entity allocation for better data locality Josh Don
2026-02-12 19:20 ` Zecheng Li
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