From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 13F5A3B3BE3 for ; Tue, 31 Mar 2026 07:08:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774940938; cv=none; b=GjnVfei2G1+pEBkfmFNU0iV87Ffg6DHLWYt8QFXlq1cLEQKNuAMUY4zVDoQM/V3p/8lpfcbK+DK+dGdf7O0yJjG/GSfW5uWvDpQhelVjiFNdt6FngHqqsFeQ1oSbBwZBGM/Rhk+WTnSI7ka0MmOw3FhyyXPnjeq5ggIhfutrR0s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774940938; c=relaxed/simple; bh=I7uuqdIcSKPH8nuMeNgZJf1t6z6GFCL20rxN5EqMOL4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=XhxQeIvrJChuGTPrW+MREC4Ix/L1MZd6DN1esjtozPg6NUn9kUYaW3lmiwf+2W66KgKr9K33c/0eSIxlJ5IYAHiCzbnxNREkK36P1sUjOhR3LFKNCIEVqOaHf/jFL/G10uilvXXgd6ry6HUC+SKGoO37xmlYdK4ZyBDcYElYZto= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=jE/N6McY; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="jE/N6McY" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=PNqiaBGdJ6UKNuGJeoA/j2aqqPWqTHfms0B44S9kXig=; b=jE/N6McY4uirakhyerPLUB12QD YdwP5yh17k3luQYIf5OodrSnxCLoOWAxnE0PRBcqUwQj7KipThuBmJ3jLfYyVz5Jt5gb5vyKbvY/d dWOKJGy7C8VjN0c83iHmrBizMiCohlOIh5av3/JEfxMqnmvSXXtBb2QjjDuqg3sYvoPhF5V1gXq7X j50x2uU/bBsRPEt8nySDHufJPQgzJduSLKLKKhU4fh0l+LrWZKdw8yVx8ibSOvAK3w22ROJ+wtap4 1EkEK0ckFSkEHaj3G2PeVXdD5PdLhClhky4nHcHaWn+Ev1o0Mx0Mw87yr7aCDZYsuLNHS08Rapr1v x7lIsztg==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7TDF-0000000FF76-3IaQ; Tue, 31 Mar 2026 07:08:39 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 0890E300E56; Tue, 31 Mar 2026 09:08:23 +0200 (CEST) Date: Tue, 31 Mar 2026 09:08:22 +0200 From: Peter Zijlstra To: K Prateek Nayak Cc: John Stultz , mingo@kernel.org, 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, wangtao554@huawei.com, quzicheng@huawei.com, dsmythies@telus.net, shubhang@os.amperecomputing.com, Suleiman Souhlal Subject: Re: [PATCH v2 1/7] sched/fair: Fix zero_vruntime tracking Message-ID: <20260331070822.GC3739027@noisy.programming.kicks-ass.net> References: <20260219075840.162631716@infradead.org> <20260219080624.438854780@infradead.org> <20260330101018.GN3738786@noisy.programming.kicks-ass.net> <73dab51a-650f-4c82-9e73-13236b2a26c2@amd.com> <20260330144005.GP3738786@noisy.programming.kicks-ass.net> <20260330191108.GU2872@noisy.programming.kicks-ass.net> 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: On Tue, Mar 31, 2026 at 06:08:27AM +0530, K Prateek Nayak wrote: > The above doesn't recover after a avg_vruntime(). Btw I'm running: > > nice -n 19 stress-ng --yield 32 -t 1000000s& > while true; do perf bench sched messaging -p -t -l 100000 -g 16; done And you're running that on a 16 cpu machine / vm ?