From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756119Ab2FTKQT (ORCPT ); Wed, 20 Jun 2012 06:16:19 -0400 Received: from casper.infradead.org ([85.118.1.10]:56051 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753550Ab2FTKQS convert rfc822-to-8bit (ORCPT ); Wed, 20 Jun 2012 06:16:18 -0400 Message-ID: <1340187373.21745.95.camel@twins> Subject: Re: [PATCH 00/10] perf, x86: Add northbridge counter support for AMD family 15h From: Peter Zijlstra To: Robert Richter Cc: Stephane Eranian , Ingo Molnar , LKML Date: Wed, 20 Jun 2012 12:16:13 +0200 In-Reply-To: <20120620100031.GI1478@erda.amd.com> References: <1340129448-8690-1-git-send-email-robert.richter@amd.com> <20120620092932.GH1478@erda.amd.com> <1340185084.21745.81.camel@twins> <20120620100031.GI1478@erda.amd.com> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2012-06-20 at 12:00 +0200, Robert Richter wrote: > > And wrt counter rotation, this only affects code to assign counters. > You don't need a separate pmu for this. It makes it easier though, on unplug you would otherwise need to filter what events are uncore and migrate those to another online cpu of the same nb instead of all events.. Also, what cpu on the NB receives the PMI? Sure it can be done, just not pretty. Combine that with all the other special casing like patches 3 and 10 and one really starts to wonder if its all worth it.