Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755700AbaGVQet (ORCPT ); Tue, 22 Jul 2014 12:34:49 -0400 Received: from casper.infradead.org ([85.118.1.10]:32960 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754337AbaGVQes (ORCPT ); Tue, 22 Jul 2014 12:34:48 -0400 Date: Tue, 22 Jul 2014 18:34:37 +0200 From: Peter Zijlstra To: Pawel Moll Cc: Richard Cochran , Steven Rostedt , Ingo Molnar , Oleg Nesterov , Andrew Morton , Mel Gorman , Andy Lutomirski , John Stultz , Stephen Boyd , Baruch Siach , Thomas Gleixner , "linux-kernel@vger.kernel.org" Subject: Re: [RFC] sched_clock: Track monotonic raw clock Message-ID: <20140722163437.GI3935@laptop> References: <1405705419-4194-1-git-send-email-pawel.moll@arm.com> <20140719050233.GA4408@netboy> <1406045849.25343.72.camel@hornet> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1406045849.25343.72.camel@hornet> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 22, 2014 at 05:17:29PM +0100, Pawel Moll wrote: > With both Ingo and John showing preference towards the clock alignment, > so that's where I looked this time (I've already done custom perf > ioctls, posix clocks... don't really know how many different ways I've > tried). So we should probably also talk about which clock to track, MONO has the advantage of making it far easier to trace clusters but has the disadvantage of stacked control loops with NTP adjusting MONO and us adjusting sched_clock. And I would really prefer to pick 1 and not make it configurable. -- 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/