Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934873Ab3DKROo (ORCPT ); Thu, 11 Apr 2013 13:14:44 -0400 Received: from mga01.intel.com ([192.55.52.88]:39859 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934696Ab3DKROk (ORCPT ); Thu, 11 Apr 2013 13:14:40 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,456,1363158000"; d="scan'208";a="320970725" Message-ID: <5166EF74.4030106@linux.intel.com> Date: Thu, 11 Apr 2013 10:14:28 -0700 From: Arjan van de Ven User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: "Paul E. McKenney" CC: linux-kernel@vger.kernel.org, mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com, sbw@mit.edu, Borislav Petkov , Kevin Hilman , Christoph Lameter Subject: Re: [PATCH documentation 1/2] nohz1: Add documentation. References: <20130411160524.GA30384@linux.vnet.ibm.com> <1365696359-30958-1-git-send-email-paulmck@linux.vnet.ibm.com> In-Reply-To: <1365696359-30958-1-git-send-email-paulmck@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 658 Lines: 14 > +2. Many architectures will place dyntick-idle CPUs into deep sleep > + states, which further degrades from-idle transition latencies. > + I think this part should just be deleted. On x86, the deeper idle states are even used with non-tickless system (the break even times are quite a bit less than even 1 msec). I can't imagine that ARM is worse on this, at which point the statement above is highly dubious -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/