From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx-3.enea.com (sestofw01.enea.se [192.36.1.252]) by mail.openembedded.org (Postfix) with SMTP id AB67A608BF for ; Thu, 8 Aug 2013 07:55:57 +0000 (UTC) Received: from localhost.enea.se (192.168.14.183) by smtp.enea.com (172.21.1.209) with Microsoft SMTP Server id 14.2.318.1; Thu, 8 Aug 2013 09:55:53 +0200 Message-ID: <52034F09.1090904@enea.com> Date: Thu, 8 Aug 2013 10:55:53 +0300 From: Vali Cobelea Organization: ENEA User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: X-Originating-IP: [192.168.14.183] Subject: GCC PARALLEL_MAKE changed X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Aug 2013 07:55:58 -0000 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Hi, We noticed that the GCC parallel make flag (PARALLEL_MAKE, located in "meta/recipes-devtools/gcc/gcc-cross-canadian_4.?.bb") got changed from "-j 32" to simply nothing. We are wondering what was the reason for this change, which seems to have been made somewhere before the fall of 2012, while the GCC was around version 4.6 or earlier (for each we dont have the repository to track down the change). After several builds where the compile time for GCC got measured, I can say that this flag indeed reduces the build time, when it is put at "-j 32" (using a proper build machine). In average the build time frame was reduced by 18%. Much appreciated any thoughts on this, I know that it has been a while since this change happen. Thank you very much, Vali