Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755220AbZCMNE7 (ORCPT ); Fri, 13 Mar 2009 09:04:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755458AbZCMNEQ (ORCPT ); Fri, 13 Mar 2009 09:04:16 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:49993 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758906AbZCMNEP (ORCPT ); Fri, 13 Mar 2009 09:04:15 -0400 Subject: Re: [PATCH] perfcounters: Make s/w counters in a group only count when group is on From: Peter Zijlstra To: Paul Mackerras Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Thomas Gleixner In-Reply-To: <1236948283.22447.36.camel@twins> References: <18873.48668.562126.113618@cargo.ozlabs.ibm.com> <1236939816.22914.3714.camel@twins> <18874.20538.785519.824803@cargo.ozlabs.ibm.com> <1236948283.22447.36.camel@twins> Content-Type: text/plain Date: Fri, 13 Mar 2009 14:04:00 +0100 Message-Id: <1236949440.5188.709.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.25.92 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 721 Lines: 16 On Fri, 2009-03-13 at 13:44 +0100, Peter Zijlstra wrote: > The same for task migration, most migrations happen when they are in > fact running, so there too we can account the migration either before we > rip it off the src cpu, or after we place it on the dst cpu. Right, I got confused between being on the cpu and having ->state = R. Migrations are the odd one out indeed, but I'd rather fudge a little with the migration counter itself than have this weird asymmetry. -- 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/