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 BB3E0C433EF for ; Thu, 7 Apr 2022 17:55:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235392AbiDGR5E (ORCPT ); Thu, 7 Apr 2022 13:57:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239237AbiDGR5E (ORCPT ); Thu, 7 Apr 2022 13:57:04 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8F618CA6EF for ; Thu, 7 Apr 2022 10:55:02 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id ED25061BDD for ; Thu, 7 Apr 2022 17:55:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58C03C385A4; Thu, 7 Apr 2022 17:55:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649354101; bh=NjqPIHsoPThEmFMj3pqLnI9A1ClWJ6kDy569ZQ6WmFI=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=Eg6eeKS57vUMS8c9cB1S0SCjMUvA8KuurAmnbiRc84hnqg8KA2iLIuA+bCcEJaVRI rukTsvuq8FbOg4244AzGK/xzr1o2tZ7pQGW2750YB/sGx/9udWx9FsAISIgGVn+X+m Ka31B6Kfrxr7iggzTVjnP94a2gcCOOoa+iu6Ni3ChRpQMKKv3r4/JBQROIGBsC/SSK Tb846uJxPF21w/TNaOR2MZa07u56X6Y4dPIgrQS2zQu+IGFVhM/PGq6xl2j+W7XEGe Zc4p7spe8DxFaiVkhWEE5Ewy7nfB1PK02XyiCxAlUWHceV5AT13bxlIauHlikz4+qt FbndlCopC4Jgw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id DF5955C3267; Thu, 7 Apr 2022 10:55:00 -0700 (PDT) Date: Thu, 7 Apr 2022 10:55:00 -0700 From: "Paul E. McKenney" To: Miguel Ojeda Cc: Zhouyi Zhou , linuxppc-dev , rcu Subject: Re: rcu_sched self-detected stall on CPU Message-ID: <20220407175500.GV4285@paulmck-ThinkPad-P17-Gen-1> Reply-To: paulmck@kernel.org References: <20220406170012.GO4285@paulmck-ThinkPad-P17-Gen-1> <20220406195011.GP4285@paulmck-ThinkPad-P17-Gen-1> <20220407151555.GR4285@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org On Thu, Apr 07, 2022 at 07:05:58PM +0200, Miguel Ojeda wrote: > On Thu, Apr 7, 2022 at 5:15 PM Paul E. McKenney wrote: > > > > Ah. So you would instead look for boot to have completed within 10 > > seconds? Either way, reliable automation might well more important than > > reduction in time. > > No (although I guess that could be an option), I was only pointing out > that when no stall is produced, the run should be much quicker than 30 > seconds (at least it was in my setup), which would be the majority of the runs. Ah, thank you for the clarification! Thanx, Paul 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C58E2C433EF for ; Thu, 7 Apr 2022 17:55:44 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KZ8Dt50DPz3bmf for ; Fri, 8 Apr 2022 03:55:42 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Eg6eeKS5; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2604:1380:4641:c500::1; helo=dfw.source.kernel.org; envelope-from=srs0=cszx=ur=paulmck-thinkpad-p17-gen-1.home=paulmck@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Eg6eeKS5; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KZ8D95dj1z2yZZ for ; Fri, 8 Apr 2022 03:55:05 +1000 (AEST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id ECEB561650; Thu, 7 Apr 2022 17:55:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58C03C385A4; Thu, 7 Apr 2022 17:55:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649354101; bh=NjqPIHsoPThEmFMj3pqLnI9A1ClWJ6kDy569ZQ6WmFI=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=Eg6eeKS57vUMS8c9cB1S0SCjMUvA8KuurAmnbiRc84hnqg8KA2iLIuA+bCcEJaVRI rukTsvuq8FbOg4244AzGK/xzr1o2tZ7pQGW2750YB/sGx/9udWx9FsAISIgGVn+X+m Ka31B6Kfrxr7iggzTVjnP94a2gcCOOoa+iu6Ni3ChRpQMKKv3r4/JBQROIGBsC/SSK Tb846uJxPF21w/TNaOR2MZa07u56X6Y4dPIgrQS2zQu+IGFVhM/PGq6xl2j+W7XEGe Zc4p7spe8DxFaiVkhWEE5Ewy7nfB1PK02XyiCxAlUWHceV5AT13bxlIauHlikz4+qt FbndlCopC4Jgw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id DF5955C3267; Thu, 7 Apr 2022 10:55:00 -0700 (PDT) Date: Thu, 7 Apr 2022 10:55:00 -0700 From: "Paul E. McKenney" To: Miguel Ojeda Subject: Re: rcu_sched self-detected stall on CPU Message-ID: <20220407175500.GV4285@paulmck-ThinkPad-P17-Gen-1> References: <20220406170012.GO4285@paulmck-ThinkPad-P17-Gen-1> <20220406195011.GP4285@paulmck-ThinkPad-P17-Gen-1> <20220407151555.GR4285@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: paulmck@kernel.org Cc: rcu , Zhouyi Zhou , linuxppc-dev Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Apr 07, 2022 at 07:05:58PM +0200, Miguel Ojeda wrote: > On Thu, Apr 7, 2022 at 5:15 PM Paul E. McKenney wrote: > > > > Ah. So you would instead look for boot to have completed within 10 > > seconds? Either way, reliable automation might well more important than > > reduction in time. > > No (although I guess that could be an option), I was only pointing out > that when no stall is produced, the run should be much quicker than 30 > seconds (at least it was in my setup), which would be the majority of the runs. Ah, thank you for the clarification! Thanx, Paul