From: K Prateek Nayak <kprateek.nayak@amd.com>
To: Jianyong Wu <jianyong.wu@outlook.com>,
Jianyong Wu <wujianyong@hygon.cn>,
mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org
Cc: dietmar.eggemann@arm.com, rostedt@goodmis.org,
bsegall@google.com, mgorman@suse.de, vschneid@redhat.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched/fair: allow imbalance between LLCs under NUMA
Date: Thu, 19 Jun 2025 12:00:11 +0530 [thread overview]
Message-ID: <4ec144f7-2b07-4d56-93b9-d23dcbe0d6fe@amd.com> (raw)
In-Reply-To: <PUZPR04MB492296C8301DDA9654D7970CE37DA@PUZPR04MB4922.apcprd04.prod.outlook.com>
Hello Jianyong,
On 6/19/2025 11:38 AM, Jianyong Wu wrote:
> If this change has bad effect for performance, is there any suggestion
> to mitigate the iperf migration issue?
How big of a performance difference are you seeing? I still don't see
any numbers from your testing on the thread.
> Or just leave it there?
Ideally, the cache-aware load balancing series [1] should be able to
address these concerns. I suggest testing iperf with those changes and
checking if that solves the issues of excessive migration.
[1] https://lore.kernel.org/lkml/cover.1750268218.git.tim.c.chen@linux.intel.com/
--
Thanks and Regards,
Prateek
next prev parent reply other threads:[~2025-06-19 6:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-28 7:09 Jianyong Wu
2025-05-29 6:39 ` K Prateek Nayak
2025-05-29 10:32 ` Jianyong Wu
2025-05-30 6:09 ` K Prateek Nayak
2025-05-30 7:36 ` Jianyong Wu
2025-06-16 2:22 ` Jianyong Wu
2025-06-17 4:06 ` K Prateek Nayak
2025-06-18 6:37 ` K Prateek Nayak
2025-06-19 6:08 ` Jianyong Wu
2025-06-19 6:30 ` K Prateek Nayak [this message]
2025-06-19 6:59 ` Jianyong Wu
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