From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753063AbcAMMP2 (ORCPT ); Wed, 13 Jan 2016 07:15:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47908 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752761AbcAMMPZ (ORCPT ); Wed, 13 Jan 2016 07:15:25 -0500 Date: Wed, 13 Jan 2016 13:15:20 +0100 From: Jiri Olsa To: "Wangnan (F)" Cc: Jiri Olsa , Arnaldo Carvalho de Melo , lkml , David Ahern , Ingo Molnar , Namhyung Kim , Peter Zijlstra Subject: Re: [RFC 6/6] perf build: Introduce FEATURES_DUMP make variable Message-ID: <20160113121520.GA28969@krava.brq.redhat.com> References: <1452509693-13452-1-git-send-email-jolsa@kernel.org> <1452509693-13452-7-git-send-email-jolsa@kernel.org> <5694C73C.3070007@huawei.com> <20160113091913.GA4487@krava.brq.redhat.com> <56961CE5.8090802@huawei.com> <20160113100328.GA5515@krava.brq.redhat.com> <56963CD0.7020105@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <56963CD0.7020105@huawei.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 13, 2016 at 08:02:24PM +0800, Wangnan (F) wrote: > > > On 2016/1/13 18:03, Jiri Olsa wrote: > >On Wed, Jan 13, 2016 at 05:46:13PM +0800, Wangnan (F) wrote: > > > >SNIP > > > >>>I'll try to check on that.. does this patch help to improve > >>>the current speed or do you need to solve this to get substantial > >>>speedup? > > Finished. > > On a 24 core machine: > > Without this feature, a full build-test takes: > > real 21m16.579s > user 176m12.989s > sys 20m54.950s > > With this feature: > > real 16m0.619s > user 172m53.896s > sys 19m22.777s > > Speedup: 24.75%. > > So this feature is really useful. looks great, thanks jirka