From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758127Ab3JOFS1 (ORCPT ); Tue, 15 Oct 2013 01:18:27 -0400 Received: from terminus.zytor.com ([198.137.202.10]:60734 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752508Ab3JOFSY (ORCPT ); Tue, 15 Oct 2013 01:18:24 -0400 Date: Mon, 14 Oct 2013 22:18:10 -0700 From: tip-bot for Ingo Molnar Message-ID: Cc: linux-kernel@vger.kernel.org, acme@redhat.com, hpa@zytor.com, mingo@kernel.org, a.p.zijlstra@chello.nl, namhyung@kernel.org, jolsa@redhat.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, acme@redhat.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl, namhyung@kernel.org, jolsa@redhat.com, dsahern@gmail.com, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] tools/perf/build: Automatically build in parallel , based on number of CPUs in the system Git-Commit-ID: 2cfbe880f0a8eed7beabade3e06fd53f999b3e32 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]); Mon, 14 Oct 2013 22:18:16 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 2cfbe880f0a8eed7beabade3e06fd53f999b3e32 Gitweb: http://git.kernel.org/tip/2cfbe880f0a8eed7beabade3e06fd53f999b3e32 Author: Ingo Molnar AuthorDate: Wed, 2 Oct 2013 11:18:28 +0200 Committer: Ingo Molnar CommitDate: Wed, 9 Oct 2013 08:48:54 +0200 tools/perf/build: Automatically build in parallel, based on number of CPUs in the system Implement automatic parallel builds when building in tools/perf: $ time make # [ perf build: Doing 'make -j12' parallel build. ] Auto-detecting system features: ... real 0m9.265s user 0m59.888s sys 0m6.082s On GNU make achieving this is not particularly easy, it requires a separate makefile, which then invokes the main Makefile. ( Note: this patch adds Makefile.parallel to show the concept - the two makefiles will be flipped in the next patch to avoid having to specify -f to get parallelism in the default build. ) Cc: Arnaldo Carvalho de Melo Cc: Peter Zijlstra Cc: Namhyung Kim Cc: David Ahern Cc: Jiri Olsa Link: http://lkml.kernel.org/n/tip-dvBjwqiTyzrufzkz8oanhpf9@git.kernel.org Signed-off-by: Ingo Molnar --- tools/perf/Makefile.parallel | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/tools/perf/Makefile.parallel b/tools/perf/Makefile.parallel new file mode 100644 index 0000000..ec5e08b --- /dev/null +++ b/tools/perf/Makefile.parallel @@ -0,0 +1,26 @@ +# +# Do a parallel build with multiple jobs, based on the number of CPUs online +# in this system: 'make -j8' on a 8-CPU system, etc. +# +# (To override it, run 'make JOBS=1' and similar.) +# +ifeq ($(JOBS),) + JOBS := $(shell grep -c ^processor /proc/cpuinfo 2>/dev/null) + ifeq ($(JOBS),) + JOBS := 1 + endif +endif + +export JOBS + +$(info $(shell printf '# [ perf build: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build. ]\n')) + +# +# Needed if no target specified: +# +all: + @$(MAKE) --no-print-directory -j$(JOBS) $@ + +%: + @$(MAKE) --no-print-directory -j$(JOBS) $@ +