From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753895Ab3KNMnb (ORCPT ); Thu, 14 Nov 2013 07:43:31 -0500 Received: from terminus.zytor.com ([198.137.202.10]:38080 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753860Ab3KNMnZ (ORCPT ); Thu, 14 Nov 2013 07:43:25 -0500 Date: Thu, 14 Nov 2013 04:43:07 -0800 From: tip-bot for Ingo Molnar Message-ID: Cc: linux-kernel@vger.kernel.org, acme@redhat.com, hpa@zytor.com, mingo@kernel.org, torvalds@linux-foundation.org, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, acme@redhat.com, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, dsahern@gmail.com, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] tools/perf/build: Fix timerfd feature check Git-Commit-ID: bb4c5500c9c5b809696eee212843e731721a6e15 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.1 (terminus.zytor.com [127.0.0.1]); Thu, 14 Nov 2013 04:43:13 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: bb4c5500c9c5b809696eee212843e731721a6e15 Gitweb: http://git.kernel.org/tip/bb4c5500c9c5b809696eee212843e731721a6e15 Author: Ingo Molnar AuthorDate: Thu, 14 Nov 2013 08:33:24 +0100 Committer: Ingo Molnar CommitDate: Thu, 14 Nov 2013 13:36:00 +0100 tools/perf/build: Fix timerfd feature check 'feature_timerfd' is checked all the time and calculated explicitly, in a serial fashion. Add it to CORE_FEATURE_TESTS which causes it to be built in parallel, using the newfangled parallel build autodetection code. This shaves 137 msecs off the perf build time on my system, which speeds up the common case cached build by 43%: Before: comet:~/tip> perf stat --null --repeat 5 make -C tools/perf/ [...] 0,453771441 seconds time elapsed ( +- 0,09% ) After: comet:~/tip> perf stat --null --repeat 5 make -C tools/perf/ [...] 0,316290185 seconds time elapsed ( +- 0,24% ) Cc: David Ahern Cc: Arnaldo Carvalho de Melo Cc: Linus Torvalds Link: http://lkml.kernel.org/n/tip-bb92CmexihopoSyqnkqepvsy@git.kernel.org Signed-off-by: Ingo Molnar --- tools/perf/config/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index f5905f2..861379e 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -142,7 +142,8 @@ CORE_FEATURE_TESTS = \ libunwind \ on-exit \ stackprotector \ - stackprotector-all + stackprotector-all \ + timerfd # # So here we detect whether test-all was rebuilt, to be able @@ -405,7 +406,6 @@ else endif endif -$(call feature_check,timerfd) ifeq ($(feature-timerfd), 1) CFLAGS += -DHAVE_TIMERFD_SUPPORT else