From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id B20CCE00321 for ; Tue, 23 Aug 2011 09:55:50 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 23 Aug 2011 09:55:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,352,1309762800"; d="scan'208";a="41397062" Received: from unknown (HELO envy.home) ([10.7.199.154]) by orsmga001.jf.intel.com with ESMTP; 23 Aug 2011 09:55:50 -0700 Message-ID: <4E53DB94.80106@linux.intel.com> Date: Tue, 23 Aug 2011 09:55:48 -0700 From: Darren Hart User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20110707 Thunderbird/5.0 MIME-Version: 1.0 To: Tom Rini References: <0c8f4cdc6cf96da157b4c4bae8f4e13fca6d46e8.1313792192.git.dvhart@linux.intel.com> <4E53ABC1.3050906@linux.intel.com> In-Reply-To: Cc: yocto@yoctoproject.org Subject: Re: [PATCH 1/1] beagleboard: enable hard floating point abi X-BeenThere: yocto@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Discussion of all things Yocto List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Aug 2011 16:55:50 -0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 08/23/2011 08:34 AM, Tom Rini wrote: > On Tue, Aug 23, 2011 at 8:31 AM, Darren Hart wrote: >> On 08/23/2011 05:38 AM, Koen Kooi wrote: >>> >>> Op 20 aug. 2011, om 00:23 heeft Darren Hart het volgende geschreven: >>> >>>> Fixes [YOCTO #1203] >>>> >>>> Using the hard floating point abi is incompatible with some binary >>>> libaries and 3D support for the Beagleboard. As we do not provide >>>> these in poky and meta-yocto, we can take advantage of the hard >>>> floating point abi. >>> >>> What advantage are you talking about? So far everyone has been unable >>> to provide real-world numbers[1] that show hardfp making a difference >>> compared to a properly configured softfp. The numbers debian and >>> meego are showing are comparing it against completely vfpless builds, >> >> >> That's good reasoning to stick with softfp+neon. Unfortunately I can't >> find the mail threads that first got me looking into adding hardfp >> support. As I said, I'm not sold on the idea, but it was requested so I >> looked into how to address it. >> >> If nobody comes forward saying they would really like to have this, I'm >> going to modify the patch series to disable hardfp by default, but leave >> the infrastructure in place so people can enable if they like. > > Well, are there some softfp related config bits we need on the yocto > side that meta-ti has, in order to bring that performance back in > line? Are you referring to a specific performance measure? Jason, Koen, are there any such config bits? We are currently using the cortexa8-neon tune configuration from oe-core. -- Darren Hart Intel Open Source Technology Center Yocto Project - Linux Kernel