From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754070AbbELVSv (ORCPT ); Tue, 12 May 2015 17:18:51 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:59011 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753741AbbELVSs (ORCPT ); Tue, 12 May 2015 17:18:48 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Will Deacon , David Ahern , Mark Rutland , Namhyung Kim , Arnaldo Carvalho de Melo Subject: [PATCH 2/2] perf tools: Use getconf to determine number of online CPUs Date: Tue, 12 May 2015 18:18:33 -0300 Message-Id: <1431465513-17481-3-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1431465513-17481-1-git-send-email-acme@kernel.org> References: <1431465513-17481-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Will Deacon Parsing /proc/cpuinfo is a fiddly, arch-dependent business and a recent change to get it working for Sparc broke arm and arm64 platforms. Use sysconf to determine the number of online CPUs only parsing /proc/cpuinfo when sysconf is not available. Signed-off-by: Will Deacon Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: David Ahern Cc: Mark Rutland Cc: Namhyung Kim Link: http://lkml.kernel.org/r/20150423140454.GJ1652@arm.com [ Made it fall back to parsing /proc when getconf not found ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/Makefile b/tools/perf/Makefile index c699dc35eef9..d31a7bbd7cee 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -24,7 +24,7 @@ unexport MAKEFLAGS # (To override it, run 'make JOBS=1' and similar.) # ifeq ($(JOBS),) - JOBS := $(shell egrep -c '^processor|^CPU' /proc/cpuinfo 2>/dev/null) + JOBS := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null) ifeq ($(JOBS),0) JOBS := 1 endif -- 2.1.0