Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934393AbaGXIkL (ORCPT ); Thu, 24 Jul 2014 04:40:11 -0400 Received: from services.gouders.net ([141.101.32.176]:59109 "EHLO services.gouders.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934276AbaGXIkI (ORCPT ); Thu, 24 Jul 2014 04:40:08 -0400 X-Greylist: delayed 1702 seconds by postgrey-1.27 at vger.kernel.org; Thu, 24 Jul 2014 04:40:07 EDT From: Dirk Gouders To: Andi Kleen Cc: Sam Ravnborg , Andi Kleen , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, mmarek@suse.cz Subject: Re: [PATCH 1/2] kbuild: Support split debug info v3 In-Reply-To: <20140723182802.GV18735@two.firstfloor.org> (Andi Kleen's message of "Wed, 23 Jul 2014 20:28:02 +0200") References: <1405466172-17055-1-git-send-email-andi@firstfloor.org> <20140720190420.GA4630@ravnborg.org> <20140720211901.GQ5803@tassilo.jf.intel.com> <20140723180501.GA15749@ravnborg.org> <20140723182802.GV18735@two.firstfloor.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux) Date: Thu, 24 Jul 2014 10:10:53 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen writes: >> echo time make -j4 -s KCFLAGS=-gsplit-dwarf >> time make -j4 -s KCFLAGS=-gsplit-dwarf >> echo time make -j4 -s KCFLAGS=-g >> time make -j4 -s KCFLAGS=-g >> echo time make -j4 -s KCFLAGS=-gsplit-dwarf >> time make -j4 -s KCFLAGS=-gsplit-dwarf >> echo time make -j4 -s KCFLAGS=-g >> time make -j4 -s KCFLAGS=-g >> echo time make -j4 -s KCFLAGS=-gsplit-dwarf >> time make -j4 -s KCFLAGS=-gsplit-dwarf >> echo time make -j4 -s KCFLAGS=-g >> time make -j4 -s KCFLAGS=-g >> >> The figures are from last run - but the other runs had compareable times. >> So in short I see a ~3 seconds speedup - out of 210 seconds. >> Thats less than I anticipated. > > Thanks. How much smaller is it? > > Just saving disk space is a good thing. Hi Andi, I applied v3 to rc6+ and did the rudimentary tests that I did with v1, i.e. make menuconfig, make, make clean, git status and have nothing to report. For times an sizes I did tests with my system's .config -- prior to each `make' I did a `make clean': split-debug: # time make -j5 ... real 6m21.819s user 22m48.828s sys 1m1.804s # du -sh . 2.6G . no split-debug: # time make -j5 ... real 6m40.311s user 23m0.648s sys 1m4.592s # du -sh . 4.3G . Dirk -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/