From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D5672111A1 for ; Wed, 14 Aug 2024 17:18:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.15.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723655925; cv=none; b=kSGOouLf+j4LqGhPLFzA9aL0iB+MuDJeZ2fw8Sispt/4l31PVOa8TqYbOzWHjV2Q8sQfiEH5xpC3AyqMoE4KiNc37IQKpcRmiTB13TrNOFA3Hv8BesVwfAwuP1UakHXxI8BYYdBDJ9lYjPr53aDZcvSmfykqodPr97xhQ9I0ZPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723655925; c=relaxed/simple; bh=6mmYT3J4QwfeMniA6nvhnCYk9hKmHhhuuvwlFZWssw8=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=qxT+gtbi6mRFyPn2VW8Ki3F6AWverSGyGrMvLea/fhoZflQrZ+Ji76JCtUB1kTH2dqpbuZoI6tm1d8vsiNwILmA98+SR4rGYPJNMqa+Z9ubpA9qLy7szo18+VstLBhSwR0ZYZT9DyJdmvDofrgjQlS9kHB2YUhNtpch7sJ0O0YM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.de; spf=pass smtp.mailfrom=gmx.de; dkim=pass (2048-bit key) header.d=gmx.de header.i=efault@gmx.de header.b=Oahb3T25; arc=none smtp.client-ip=212.227.15.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmx.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmx.de header.i=efault@gmx.de header.b="Oahb3T25" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.de; s=s31663417; t=1723655890; x=1724260690; i=efault@gmx.de; bh=5ibHj9AV3wDKWhb2rF9aNO9l1Q969wURFhpMFe3wYuE=; h=X-UI-Sender-Class:Message-ID:Subject:From:To:Cc:Date:In-Reply-To: References:Content-Type:MIME-Version:Content-Transfer-Encoding:cc: content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=Oahb3T25cOvNe+TE9o5Bex8oUMv8kx3csVFLI9aUQ0G5HjpGow8QQqZleghJhrKu oTrVR+QPm6YzEbTQjIbthG6xQFXrU2qjdTt01ib91d62bFqszri2UR6UVBP5y5oI+ U98UO947U2mKRVsoe4rTR/1EX5y9Be7s1SlJjd4JSf5Jda4fsknPIoEqtL/97vJHL EpGL8JjMLMsP69ebh/01oyc1rGpF19SXGoxHhQIyz28Tg6DXe3pBY7VqxrRZQl8uX WAFJx+C9rY32024y/UA5s68UkJASmxnisbZGtufGRjY3Xl/R5iuQA5aOUXpEGrEae JqnzEtoFrEmHLAvvGA== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from homer.fritz.box ([91.212.106.61]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1Mlf0K-1rwf5s1mao-00lyT2; Wed, 14 Aug 2024 19:18:10 +0200 Message-ID: <9cc41a877aa2d263b47de698d3ebe724961f9e55.camel@gmx.de> Subject: Re: [PATCH 00/24] Complete EEVDF From: Mike Galbraith To: Vincent Guittot Cc: Peter Zijlstra , mingo@redhat.com, juri.lelli@redhat.com, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org, kprateek.nayak@amd.com, wuyun.abel@bytedance.com, youssefesmat@chromium.org, tglx@linutronix.de Date: Wed, 14 Aug 2024 19:18:08 +0200 In-Reply-To: References: <20240727102732.960974693@infradead.org> <1572d0f2646312767a3ef8b72f740c9033163bf3.camel@gmx.de> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.42.4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:5YGAKM5g2hwyF31VY5oQGLv7nCzD1JLJfRdkUOMQO8s1wcgbSVU CLtlneyylI+QQMMzpvKdI/c6+VBi3PP4PdGd9jKs9c8Q1eentBnUchFQFbNEaPjZROnD0m9 ZnTev0mbcNlats2vPzaZ7ETXi40xmPKIViaWZY9OovDKm3s+zQumDx9tNpwAih0ehUdKD13 HH8jZqYK55SdHSelOCikw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:vq1iCbiKo+k=;9HDfadfkAHE/RDL8YMdM/qKDhM1 8omgIfw1UhMtJHokU5k9w+BRIahi9L5Pq5KJ6P3+fx5Hcy76WHTBxFKo82I0pY6XyflFRwo/m IHH01plvruu1jPVcvNFk94W4ajk8C4g+TRTa9AFMao+ta1FZDexy4eKMGPzHGsXoFzyo+x8z1 Uc+9Zcmagc4hpphbvsK8a3K7Psd7bigAp+YTFcAl3CsX8VbW2PtKQOuoJxLMSG02IKMvb2zXo EVObS+VbN30cUZXCHX854Ta6rdS3IElq3hJtrgBEKbWLZuMJkymqSrQ4y9EPD35S4bk9uVhlh R6AnpQz6YS9lRoWI/R6esHue5ofUSd+rm7ftonNwcVu5QJSw/ziaa7pE+aym7Uk5AFs+wpN98 Gdkvdb7mo7zdyCAv0kgbDJKNg/RcC2DiYZqFn3RbwERXLb2nI8T2Qd37iYwXFpccwe60Splst hGeEbIAMr+KNpaTC6KAHVFKOnuXWghxUKQu0a3ArXzyzeUslJg/hnXWsA451gy6pNUPE5vqYQ jS6hDQWiRsiq7nBiJy45yHf/6tzacvrQlHzKRXhqy9UWwhHJp/+Zmbi3iI+UwNonI3qqgQTvK HdFHEryy4Ljg2iS8MIc7QjnRohAigwop4QojEmthWPbocifpVfJMWaby3H2gbxZ85C097dblv /lBL5H+UyOXfODf8MJ9/oPtr4Pwz3dnQ7Atzn1uPadXbnNivri7pbPrVIr6CRS90Gq0l3KrPk XVpH6cK8Mj0DdKeZ5OVoPf6UwPmMmVxepo1BGyPcqa+pth3pNUTz4yLLnb7wWRi9HKICTUEin bM/fTiaWkXmCJMQM/Hvectlw== On Wed, 2024-08-14 at 18:59 +0200, Vincent Guittot wrote: > On Wed, 14 Aug 2024 at 18:46, Mike Galbraith wrote: > > > > On Wed, 2024-08-14 at 16:34 +0200, Vincent Guittot wrote: > > > > > > While trying to test what would be the impact of delayed dequeue on > > > load_avg, I noticed something strange with the running slice. I have= a > > > simple test with 2 always running threads on 1 CPU and the each thre= ad > > > runs around 100ms continuously before switching to the other one > > > whereas I was expecting 3ms (the sysctl_sched_base_slice on my syste= m) > > > between 2 context swicthes > > > > > > I'm using your sched/core branch. Is it the correct one ? > > > > Hm, building that branch, I see the expected tick granularity (4ms). > > On my side tip/sched/core switches every 4ms but Peter's sched/core, > which is delayed queued on top of tip/sched/core if I don't get it > wrong, switches every 100ms. FWIW, I checked my local master-rt tree as well, which has Peter's latest eevdf series wedged in (plus 4cc290c20a98 now).. it also worked as expected. -Mike