From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755828AbcAOIeG (ORCPT ); Fri, 15 Jan 2016 03:34:06 -0500 Received: from casper.infradead.org ([85.118.1.10]:54999 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808AbcAOIeF (ORCPT ); Fri, 15 Jan 2016 03:34:05 -0500 Date: Fri, 15 Jan 2016 09:34:00 +0100 From: Peter Zijlstra To: Luca Abeni Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Juri Lelli Subject: Re: [RFC 5/8] Track the "total rq utilisation" too Message-ID: <20160115083359.GC3421@worktop> References: <1452785094-3086-1-git-send-email-luca.abeni@unitn.it> <1452785094-3086-6-git-send-email-luca.abeni@unitn.it> <20160114194837.GE6357@twins.programming.kicks-ass.net> <20160115075049.1e24bde8@luca-1225C> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160115075049.1e24bde8@luca-1225C> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 15, 2016 at 07:50:49AM +0100, Luca Abeni wrote: > On Thu, 14 Jan 2016 20:48:37 +0100 > Peter Zijlstra wrote: > > > On Thu, Jan 14, 2016 at 04:24:50PM +0100, Luca Abeni wrote: > > > This is the sum of the utilisations of tasks that are assigned to > > > a runqueue, independently from their state (TASK_RUNNING or blocked) > > > > Is it actually used? > Not in this patchset... > It is a possible "cheap" (but less accurate) alternative to the > tracking introduced in patch 4. Or can be used in more advanced > implementations of multi-processor GRUB, but not in this patchset. > > So, it can be removed from the patchset; I added it so that people can > see all the possible alternative utilization tracking strategies. OK, so that might've been useful text for the changelog. But given that, maybe leave it out for now. BTW, have you got a paper on smp grub?