From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97C58C4167B for ; Mon, 4 Dec 2023 19:30:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231368AbjLDTaA (ORCPT ); Mon, 4 Dec 2023 14:30:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229509AbjLDT37 (ORCPT ); Mon, 4 Dec 2023 14:29:59 -0500 Received: from mail-oo1-f47.google.com (mail-oo1-f47.google.com [209.85.161.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7288B6 for ; Mon, 4 Dec 2023 11:30:05 -0800 (PST) Received: by mail-oo1-f47.google.com with SMTP id 006d021491bc7-58e256505f7so1496254eaf.3 for ; Mon, 04 Dec 2023 11:30:05 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701718205; x=1702323005; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Rkh649P5swTHC96T9y/w4miqT3snggWcTsKeWpqgnz4=; b=iwkEH/GoI7xz6BMBum5Qd2lt/0GTr2XhAEb0pTljj5aQfH8LN++GuSAECV7IcSSV5/ nQs7TkGRLD9GvSzWyA3oaK+KRPOT9SM81nY+JCoeIvSCySnceyW9y3wiwW4UofbA/RGr R4fg/q7qOvQDfCwwePu08cLPFrlATb1wE7ZZGlsa+XZon5QZjGWJQiurUyKrujtNfDRO hQ7oZu0rtip9DBRNMMk5kZKGTGE4P421QIAlsrxDcIL5Id1UXSzxq4ei37TI43OuJJ3/ d/4DE9zQ3Z1O90l+6Ln/J3JH3BV9PG/KKKtoneZVk/sq+J+Bg9xskCLq8PacVIiL5pPx QkAQ== X-Gm-Message-State: AOJu0YwVaJJ3N4DAsKXszfHe+vZEPt2gk4ADvg4GCklBDSN063JF7Q4T ngZo2G08u7eXwG1hJjUIzvqN3x1a+rgLPdN4 X-Google-Smtp-Source: AGHT+IGhccHy9SqwR+G0d2RpkPE6ELIl/0DoQRxnwLQM1LSotUDm+ILilCD03/nynymSgcDoG0PGpg== X-Received: by 2002:a4a:b388:0:b0:58e:1c47:879e with SMTP id p8-20020a4ab388000000b0058e1c47879emr3426535ooo.19.1701718204674; Mon, 04 Dec 2023 11:30:04 -0800 (PST) Received: from maniforge (c-24-1-27-177.hsd1.il.comcast.net. [24.1.27.177]) by smtp.gmail.com with ESMTPSA id bn29-20020a05620a2add00b0077d5c5af0c1sm4463804qkb.6.2023.12.04.11.30.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Dec 2023 11:30:04 -0800 (PST) Date: Mon, 4 Dec 2023 13:30:01 -0600 From: David Vernet To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, tj@kernel.org, roman.gushchin@linux.dev, gautham.shenoy@amd.com, kprateek.nayak@amd.com, aaron.lu@intel.com, wuyun.abel@bytedance.com, kernel-team@meta.com, aboorvad@linux.vnet.ibm.com, yu.c.chen@intel.com Subject: Re: [PATCH v3 0/7] sched: Implement shared runqueue in CFS Message-ID: <20231204193001.GA53255@maniforge> References: <20230809221218.163894-1-void@manifault.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230809221218.163894-1-void@manifault.com> User-Agent: Mutt/2.2.12 (2023-09-09) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 09, 2023 at 05:12:11PM -0500, David Vernet wrote: > Changes > ------- > > This is v3 of the shared runqueue patchset. This patch set is based off > of commit 88c56cfeaec4 ("sched/fair: Block nohz tick_stop when cfs > bandwidth in use") on the sched/core branch of tip.git. > > v1 (RFC): https://lore.kernel.org/lkml/20230613052004.2836135-1-void@manifault.com/ > v2: https://lore.kernel.org/lkml/20230710200342.358255-1-void@manifault.com/ Hello everyone, I wanted to give an update on this, as I've been promising a v4 of the patch set for quite some time. I ran more experiments over the last few weeks, and EEVDF has changed the performance profile of the SHARED_RUNQ feature quite a bit compared to what we were observing with CFS. We may pick this back up again at a later point, but for now we're going to take a step back and re-evaluate. Thanks, David