From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 3AB2B1DE4C7 for ; Wed, 6 Nov 2024 11:09:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730891377; cv=none; b=jkdtKSLcQbUR6CFJ2PaS5Ac+IIEb2T0Jwc8xPqjC9YEH2wyt1/jb8Z1a+hVPjCBfn+YZ5cX+WtbCxbomCrdbCu5BLxBUs8FMa3Lgf4AOXH6uwG/2H3Tk1jFBUiFvF+r8bgzURTNDUbgJG5uP3mfamrvljPq+KOil/kAxmtbmi30= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730891377; c=relaxed/simple; bh=2hr9vNgaqFJGpc8y5Y5spJQWhzbyZLblQav8t9Ftgw4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EprY+Cm3pFpIYfkRdAYkY+1OjEB0qJp4NYT52SQWJiyWaQTRMBpa1Aj/KS3pfhvUGi1vhc5VIHN90iPxb7BTHHoQI3xSGkbTR+ZhRDPBz3GmTJ5yORVAkxl+qm6lR9klJNPCUPWpsNvEOGH6Sbu8qeNx8Lz8KmZtDO7lRM17TF4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=h03EHJOr; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="h03EHJOr" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=2hr9vNgaqFJGpc8y5Y5spJQWhzbyZLblQav8t9Ftgw4=; b=h03EHJOrzsBk7V+/1ljPslDlTQ ZdbpYQkbkJPzS/0n/HFmyuNk6HdkmULhO+2Pt10foYJugyUFI42XGtJGTq52AD2ikrUf5DPMxhgNl d0T/m++7QTPiwUGS7uU7UhBBFkQTIis2BKuY0xTFPNGgnKZ6qdGOf+uDwRya4+BBBFE8V5kbSoxxl WNL5iEXQ0VMo0OVHUMpkzJVqc+w4MzEM21KmBAuZtBITmsheNBv9bPX12flH7OwCCSMMvY71LNasO IZ2/DyuUCBBlIkkL4s3tIU+KGw8qmHW34wro4ok1E2sUd4vwZ2vgVAGpWXkj5rGpd0bUGJ0Jl5TqP CF/W8WKg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1t8duf-00000004QZD-1jWf; Wed, 06 Nov 2024 11:09:26 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id A294D300478; Wed, 6 Nov 2024 12:09:25 +0100 (CET) Date: Wed, 6 Nov 2024 12:09:25 +0100 From: Peter Zijlstra To: K Prateek Nayak Cc: Saravana Kannan , Samuel Wu , David Dai , 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, wuyun.abel@bytedance.com, youssefesmat@chromium.org, tglx@linutronix.de, efault@gmx.de, Android Kernel Team , Qais Yousef , Vincent Palomares , John Stultz , Luis Machado Subject: Re: [PATCH 00/24] Complete EEVDF Message-ID: <20241106110925.GK24862@noisy.programming.kicks-ass.net> References: <20240727102732.960974693@infradead.org> <4a3dac53-69e5-d3cd-8bc0-3549af4932b3@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4a3dac53-69e5-d3cd-8bc0-3549af4932b3@amd.com> On Wed, Nov 06, 2024 at 11:49:00AM +0530, K Prateek Nayak wrote: > Since delayed entities are still on the runqueue, they can affect PELT > calculation. Vincent and Dietmar have both noted this and Peter posted > https://lore.kernel.org/lkml/172595576232.2215.18027704125134691219.tip-bot2@tip-bot2/ > in response but it was pulled out since Luis reported observing -ve > values for h_nr_delayed on his setup. A lot has been fixed around > delayed dequeue since and I wonder if now would be the right time to > re-attempt h_nr_delayed tracking. Yeah, it's something I meant to get back to. I think the patch as posted was actually right and it didn't work for Luis because of some other, since fixed issue. But I might be misremembering things. I'll get to it eventually :/