From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964773Ab2GEPpT (ORCPT ); Thu, 5 Jul 2012 11:45:19 -0400 Received: from mail-bk0-f46.google.com ([209.85.214.46]:47182 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751179Ab2GEPpR (ORCPT ); Thu, 5 Jul 2012 11:45:17 -0400 MIME-Version: 1.0 In-Reply-To: <20120703040446.GJ11413@one.firstfloor.org> References: <1341254598-1379-1-git-send-email-andi@firstfloor.org> <1341254598-1379-3-git-send-email-andi@firstfloor.org> <1341256733.23484.11.camel@twins> <20120702195744.GG11413@one.firstfloor.org> <1341260540.23484.25.camel@twins> <20120702210008.GB14479@tassilo.jf.intel.com> <1341265014.23484.47.camel@twins> <20120702215722.GC14479@tassilo.jf.intel.com> <20120703040446.GJ11413@one.firstfloor.org> Date: Thu, 5 Jul 2012 17:45:16 +0200 Message-ID: Subject: Re: [PATCH 2/5] perf, x86: Enable PDIR precise instruction profiling on IvyBridge From: Stephane Eranian To: Andi Kleen Cc: Andi Kleen , Peter Zijlstra , x86@kernel.org, linux-kernel@vger.kernel.org, Jiri Olsa Content-Type: text/plain; charset=UTF-8 X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 3, 2012 at 6:04 AM, Andi Kleen wrote: >> Well, the only way I can think of would be to request that the >> event be programmed with exclusive mode ALWAYS. That >> should not be to hard to add. > > I suspect it would need some special callbacks from the events core, > that's why I only tried on IvyBridge. >x You could simply add a check in the x86 init code like what is done with the pebs events and precise mode. > Anyways, I'll drop it as the people in charge didn't approve of > instruction sampling. > > -Andi