From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753641Ab0EUJLZ (ORCPT ); Fri, 21 May 2010 05:11:25 -0400 Received: from casper.infradead.org ([85.118.1.10]:36402 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751356Ab0EUJLY (ORCPT ); Fri, 21 May 2010 05:11:24 -0400 Message-Id: <20100521090710.904944001@chello.nl> User-Agent: quilt/0.47-1 Date: Fri, 21 May 2010 11:02:11 +0200 From: Peter Zijlstra To: Ingo Molnar , Paul Mackerras , Arnaldo Carvalho de Melo Cc: Frederic Weisbecker , Steven Rostedt , LKML , Peter Zijlstra Subject: [PATCH 10/10] perf: Optimize perf_tp_event_match References: <20100521090201.326791353@chello.nl> Content-Disposition: inline; filename=perf-opt-exl.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since we know tracepoints come from kernel context, avoid conditionals that try and establish that very fact. Signed-off-by: Peter Zijlstra --- kernel/perf_event.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) Index: linux-2.6/kernel/perf_event.c =================================================================== --- linux-2.6.orig/kernel/perf_event.c +++ linux-2.6/kernel/perf_event.c @@ -4477,7 +4477,10 @@ static int perf_tp_event_match(struct pe struct perf_sample_data *data, struct pt_regs *regs) { - if (perf_exclude_event(event, regs)) + /* + * All tracepoints are from kernel-space. + */ + if (event->attr.exclude_kernel) return 0; if (!perf_tp_filter_match(event, data))