From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755292Ab0ESJNH (ORCPT ); Wed, 19 May 2010 05:13:07 -0400 Received: from casper.infradead.org ([85.118.1.10]:35630 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751931Ab0ESJND convert rfc822-to-8bit (ORCPT ); Wed, 19 May 2010 05:13:03 -0400 Subject: Re: [tip:perf/core] perf/ftrace: Optimize perf/tracepoint interaction for single events From: Peter Zijlstra To: Frederic Weisbecker Cc: mingo@redhat.com, hpa@zytor.com, paulus@samba.org, acme@redhat.com, linux-kernel@vger.kernel.org, efault@gmx.de, rostedt@goodmis.org, tglx@linutronix.de, mingo@elte.hu, linux-tip-commits@vger.kernel.org In-Reply-To: <20100519090654.GK5704@nowhere> References: <20100519075804.GF5704@nowhere> <1274257123.5605.10260.camel@twins> <20100519082335.GG5704@nowhere> <1274259525.5605.10352.camel@twins> <20100519090654.GK5704@nowhere> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Wed, 19 May 2010 11:12:28 +0200 Message-ID: <1274260348.5605.10379.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2010-05-19 at 11:06 +0200, Frederic Weisbecker wrote: > On Wed, May 19, 2010 at 10:58:45AM +0200, Peter Zijlstra wrote: > > How about something like the below? > > > > > > --- > > Subject: perf, trace: Remove IRQ-disable from perf/tracepoint interaction > > From: Peter Zijlstra > > Date: Wed May 19 10:52:27 CEST 2010 > > > > > > > > Signed-off-by: Peter Zijlstra > > --- > > > > Looks fine if we don't have nested irqs. Well, I was thinking the per-context recursion thing would sort that out. We can have 1 event per context in-flight.