From: Peter Zijlstra <peterz@infradead.org>
To: "Mohamed Abuelfotoh, Hazem" <abuehaze@amazon.com>
Cc: Mario Roy <marioeroy@gmail.com>, Chris Mason <clm@meta.com>,
Joseph Salisbury <joseph.salisbury@oracle.com>,
Adam Li <adamli@os.amperecomputing.com>,
Josh Don <joshdon@google.com>,
mingo@redhat.com, juri.lelli@redhat.com,
vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
vschneid@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/4] sched/fair: Proportional newidle balance
Date: Mon, 2 Feb 2026 11:51:44 +0100 [thread overview]
Message-ID: <20260202105144.GC1282955@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <683b4860-1076-43b8-8fb9-ca8ac26cd8f4@amazon.com>
On Fri, Jan 30, 2026 at 01:16:52PM +0000, Mohamed Abuelfotoh, Hazem wrote:
> The main difference between Intel based c7i.4xlarge vs AMD based c7a.4xlarge
> is that on Intel we have HT enabled so the instance has 16 vCPU which are
> really 8 Physical cores with HT enabled. On AMD the VM comes with 16
> physical cores with no HT so it has 2 CCDs while on Intel we have a single
> L3 cache. I am also adding the output of lscpu on both instances to clarify
> architectural discrepancies between both.
OK, that clarifies.
How does the NI_RATE patch work for you?
https://lkml.kernel.org/r/20260127151748.GA1079264@noisy.programming.kicks-ass.net
next prev parent reply other threads:[~2026-02-02 10:51 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-07 16:06 [PATCH 0/4] sched: The newidle balance regression Peter Zijlstra
2025-11-07 16:06 ` [PATCH 1/4] sched/fair: Revert max_newidle_lb_cost bump Peter Zijlstra
2025-11-14 12:19 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2025-11-17 16:23 ` tip-bot2 for Peter Zijlstra
2025-11-07 16:06 ` [PATCH 2/4] sched/fair: Small cleanup to sched_balance_newidle() Peter Zijlstra
2025-11-10 13:55 ` Dietmar Eggemann
2025-11-10 14:04 ` Peter Zijlstra
2025-11-12 14:37 ` Shrikanth Hegde
2025-11-12 14:42 ` Peter Zijlstra
2025-11-12 15:08 ` Peter Zijlstra
2025-11-12 15:28 ` Shrikanth Hegde
2025-11-14 9:49 ` Peter Zijlstra
2025-11-14 10:22 ` Vincent Guittot
2025-11-14 11:05 ` Peter Zijlstra
2025-11-14 13:11 ` Vincent Guittot
2025-11-14 12:19 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2025-11-17 16:23 ` tip-bot2 for Peter Zijlstra
2025-11-07 16:06 ` [PATCH 3/4] sched/fair: Small cleanup to update_newidle_cost() Peter Zijlstra
2025-11-14 12:19 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2025-11-17 16:23 ` tip-bot2 for Peter Zijlstra
2025-11-07 16:06 ` [PATCH 4/4] sched/fair: Proportional newidle balance Peter Zijlstra
2025-11-10 13:55 ` Dietmar Eggemann
2025-11-11 9:07 ` Adam Li
2025-11-11 9:20 ` Peter Zijlstra
2025-11-12 12:04 ` Adam Li
2025-11-12 13:41 ` Peter Zijlstra
2025-11-12 15:42 ` Shrikanth Hegde
2025-11-14 9:35 ` Peter Zijlstra
2025-11-14 12:18 ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2025-11-17 16:23 ` tip-bot2 for Peter Zijlstra
2026-01-18 20:46 ` [PATCH 4/4] " Mario Roy
2026-01-23 10:50 ` Peter Zijlstra
2026-01-23 11:03 ` Peter Zijlstra
2026-01-23 12:24 ` K Prateek Nayak
2026-01-28 4:08 ` K Prateek Nayak
2026-01-27 4:15 ` Mario Roy
2026-01-27 10:40 ` Peter Zijlstra
2026-01-27 15:17 ` Peter Zijlstra
2026-01-30 1:44 ` Mario Roy
2026-01-30 4:14 ` Mario Roy
2026-02-24 9:13 ` [tip: sched/core] sched/fair: More complex proportional " tip-bot2 for Peter Zijlstra
2026-01-25 12:22 ` [PATCH 4/4] sched/fair: Proportional " Mohamed Abuelfotoh, Hazem
2026-01-27 8:44 ` Peter Zijlstra
2026-01-28 15:48 ` Mohamed Abuelfotoh, Hazem
2026-01-29 9:19 ` Peter Zijlstra
2026-01-29 9:24 ` Peter Zijlstra
2026-01-30 16:12 ` Mohamed Abuelfotoh, Hazem
2026-01-30 13:16 ` Mohamed Abuelfotoh, Hazem
2026-02-02 10:51 ` Peter Zijlstra [this message]
2026-02-02 11:07 ` Mohamed Abuelfotoh, Hazem
2026-02-04 12:45 ` Mohamed Abuelfotoh, Hazem
2026-02-04 13:27 ` Peter Zijlstra
2026-02-04 13:59 ` Mohamed Abuelfotoh, Hazem
2026-02-04 14:05 ` Peter Zijlstra
2026-02-04 22:48 ` Mohamed Abuelfotoh, Hazem
2026-01-27 8:50 ` Peter Zijlstra
2026-01-27 9:13 ` Peter Zijlstra
2026-01-28 16:24 ` Mohamed Abuelfotoh, Hazem
2026-01-28 16:03 ` Mohamed Abuelfotoh, Hazem
2026-04-29 8:51 ` Qing Wang
2026-05-06 2:44 ` [PATCH] sched/fair: Replace random newidle_balance with Bresenham accumulator Qing Wang
2026-05-13 2:21 ` Qing Wang
2026-05-13 5:29 ` K Prateek Nayak
2026-05-14 2:22 ` Qing Wang
2026-06-02 5:46 ` [PATCH v2] " Qing Wang
2025-11-10 19:47 ` [PATCH 0/4] sched: The newidle balance regression Chris Mason
2025-11-11 19:08 ` Josh Don
2025-11-12 21:59 ` Chris Mason
2025-11-14 9:37 ` Peter Zijlstra
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