Date: Thu, 21 Feb 2013 09:02:36 -0800 From: Tim Kientzle <tim@kientzle.com> To: Werner Thie <werner@thieprojects.ch> Cc: freebsd-arm@freebsd.org Subject: Re: MFCard access speed difference between RPi and Beaglebone Message-ID: <337A8E96-9B28-4F98-8131-9E68A57B42E3@kientzle.com> In-Reply-To: <51263322.3030706@thieprojects.ch> References: <51263322.3030706@thieprojects.ch>
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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
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