From owner-freebsd-arm@FreeBSD.ORG Thu Feb 21 17:02:37 2013 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id D33764A4 for ; Thu, 21 Feb 2013 17:02:37 +0000 (UTC) (envelope-from tim@kientzle.com) Received: from monday.kientzle.com (99-115-135-74.uvs.sntcca.sbcglobal.net [99.115.135.74]) by mx1.freebsd.org (Postfix) with ESMTP id B5A93733 for ; Thu, 21 Feb 2013 17:02:37 +0000 (UTC) Received: (from root@localhost) by monday.kientzle.com (8.14.4/8.14.4) id r1LH2bmK094749; Thu, 21 Feb 2013 17:02:37 GMT (envelope-from tim@kientzle.com) Received: from [192.168.2.143] (CiscoE3000 [192.168.1.65]) by kientzle.com with SMTP id hmijxn2x544a9zf32pd4mse9rw; Thu, 21 Feb 2013 17:02:37 +0000 (UTC) (envelope-from tim@kientzle.com) Subject: Re: MFCard access speed difference between RPi and Beaglebone Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: text/plain; charset=us-ascii From: Tim Kientzle In-Reply-To: <51263322.3030706@thieprojects.ch> Date: Thu, 21 Feb 2013 09:02:36 -0800 Content-Transfer-Encoding: quoted-printable Message-Id: <337A8E96-9B28-4F98-8131-9E68A57B42E3@kientzle.com> References: <51263322.3030706@thieprojects.ch> To: Werner Thie X-Mailer: Apple Mail (2.1283) Cc: freebsd-arm@freebsd.org X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Feb 2013 17:02:37 -0000 On Feb 21, 2013, at 6:45 AM, Werner Thie wrote: > Hi >=20 > trying to nail down the crash and core dump in Python when importing = ctypes I did a parallel build of python on both systems with the same = SVN rev 246947 of kernel. >=20 > The RPi seems to beat the Bbone quite clearly with a ration of 6 : 10 >=20 > It is very apparent (when unpacking for instance) that the Bb shows a = much more pronounced 'hickup' behavior, unpacking 40-60 files and then = most probably doing disk IO. >=20 > Swapping the MFCards does not change the situation at all. >=20 > Can anybody out there suppprt this observation and/or explain it? I've seen the same behavior with things like SVN checkouts; the BBone runs quite smoothly for a while and then stalls. I've been assuming that it was the MMCSD driver; skimming through the code, it looks like there's a lot of room for improvement. Tim