Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933510Ab3CVOsd (ORCPT ); Fri, 22 Mar 2013 10:48:33 -0400 Received: from a192-102.smtp-out.amazonses.com ([199.255.192.102]:19041 "EHLO a192-102.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753733Ab3CVOsc (ORCPT ); Fri, 22 Mar 2013 10:48:32 -0400 X-Greylist: delayed 572 seconds by postgrey-1.27 at vger.kernel.org; Fri, 22 Mar 2013 10:48:32 EDT Date: Fri, 22 Mar 2013 14:38:58 +0000 From: Christoph Lameter X-X-Sender: cl@gentwo.org To: "Paul E. McKenney" cc: Steven Rostedt , Frederic Weisbecker , Rob Landley , linux-kernel@vger.kernel.org, josh@joshtriplett.org, zhong@linux.vnet.ibm.com, khilman@linaro.org, geoff@infradead.org, tglx@linutronix.de Subject: Re: [PATCH] nohz1: Documentation In-Reply-To: <20130321205054.GI3637@linux.vnet.ibm.com> Message-ID: <0000013d9289cebc-e6380265-3a74-4343-b851-765f785a3754-000000@email.amazonses.com> References: <1363636794.15703.32@driftwood> <20130318222548.GG3656@linux.vnet.ibm.com> <1363822338.6345.33.camel@gandalf.local.home> <20130320235545.GL3637@linux.vnet.ibm.com> <0000013d8db514e4-bf492080-82c9-412a-90b8-54ddc1463e4b-000000@email.amazonses.com> <20130321171518.GW3637@linux.vnet.ibm.com> <0000013d8e3f58ce-0f6ea95f-780a-49c1-a633-5aa0cf3e5040-000000@email.amazonses.com> <20130321185821.GF3637@linux.vnet.ibm.com> <0000013d8e8d24fd-d2931c45-2722-46d1-8b47-2ef11e21096d-000000@email.amazonses.com> <20130321205054.GI3637@linux.vnet.ibm.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SES-Outgoing: 199.255.192.102 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 581 Lines: 14 On Thu, 21 Mar 2013, Paul E. McKenney wrote: > So, how long of busy periods are you contemplating for your SCHED_FIFO > threads? Is it possible to tune/adjust the offending per-CPU ktheads > to wake up less frequently than that time? Test programs right now run 10 seconds. 30 seconds would definitely be enough for the worst case. -- 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/