9:51 a.m.
Hi,
For a simple first impression of the performance (and because for me
Python performance is important), I used pystone.py on the BeagleBone
Black (http://svn.python.org/projects/python/trunk/Lib/test/pystone.py).
Fedora:
Pystone(1.1) time for 50000 passes = 10.9073
This machine benchmarks at 4584.1 pystones/second
Debian:
Pystone(1.1) time for 50000 passes = 4.38
This machine benchmarks at 11415.5 pystones/second
Is there a good explanation for this?
--
-- Jos Vos <jos(a)xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
12:46 p.m.
For a simple first impression of the performance (and because for me
Python performance is important), I used pystone.py on the BeagleBone
Black (http://svn.python.org/projects/python/trunk/Lib/test/pystone.py).
Fedora:
Pystone(1.1) time for 50000 passes = 10.9073
This machine benchmarks at 4584.1 pystones/second
Debian:
Pystone(1.1) time for 50000 passes = 4.38
This machine benchmarks at 11415.5 pystones/second
Is there a good explanation for this?
Are you using the same SD card for both?
1:04 p.m.
On Fri, Nov 29, 2013 at 06:46:00PM +0000, Peter Robinson wrote:
Are you using the same SD card for both?
Same brand, same speed and class specification, only one is 4 GB and
the other 8 GB. But when I run it multiple times (all results are
approx. the same) I guess Python etc. is in the buffer cache.
--
-- Jos Vos <jos(a)xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
3:36 p.m.
Could this be due to an outdated version of u-boot? I haven't had a chance
to get Fedora on my BBB yet, so I don't know what version of u-boot is
used/recommended in the image but I recall hearing about this in the
OpenBSD mailing list:
"The last version of u-boot includes some important changes for the users
of BBB. With this version, the BBB runs at 1Ghz (now is running at
550mhz) when the board is connected to the power connector. The code was
developed by various developers of TI, so it's safe."
http://marc.info/?l=openbsd-arm&m=138100865002079&w=2
On Fri, Nov 29, 2013 at 2:04 PM, Jos Vos <jos(a)xos.nl> wrote:
On Fri, Nov 29, 2013 at 06:46:00PM +0000, Peter Robinson wrote:
> Are you using the same SD card for both?
Same brand, same speed and class specification, only one is 4 GB and
the other 8 GB. But when I run it multiple times (all results are
approx. the same) I guess Python etc. is in the buffer cache.
--
-- Jos Vos <jos(a)xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
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3:40 p.m.
On Fri, Nov 29, 2013 at 9:36 PM, Travis Paul <Tr(a)vispaul.me> wrote:
Could this be due to an outdated version of u-boot? I haven't had
a chance
to get Fedora on my BBB yet, so I don't know what version of u-boot is
used/recommended in the image but I recall hearing about this in the OpenBSD
mailing list:
"The last version of u-boot includes some important changes for the users
of BBB. With this version, the BBB runs at 1Ghz (now is running at
550mhz) when the board is connected to the power connector. The code was
developed by various developers of TI, so it's safe."
http://marc.info/?l=openbsd-arm&m=138100865002079&w=2
More likely to be device tree as I stated previously.
3:15 p.m.
On Fri, Nov 29, 2013 at 04:36:57PM -0500, Travis Paul wrote:
Could this be due to an outdated version of u-boot? I haven't had
a chance
to get Fedora on my BBB yet, so I don't know what version of u-boot is
used/recommended in the image but I recall hearing about this in the
OpenBSD mailing list:
"The last version of u-boot includes some important changes for the users
of BBB. With this version, the BBB runs at 1Ghz (now is running at
550mhz) when the board is connected to the power connector. The code was
developed by various developers of TI, so it's safe."
http://marc.info/?l=openbsd-arm&m=138100865002079&w=2
Hmm... I also ran dhrystone and the speed in Fedora is 0.564 times the
speed in Debian, pretty close to the 550/1000 ratio.
Tomorrow I'll also see if using a standard power supply makes any
difference (I now use a mini-USB charger for all tests).
--
-- Jos Vos <jos(a)xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
12:30 p.m.
On Fri, Nov 29, 2013 at 04:51:46PM +0100, Jos Vos wrote:
Fedora:
Pystone(1.1) time for 50000 passes = 10.9073
This machine benchmarks at 4584.1 pystones/second
Debian:
Pystone(1.1) time for 50000 passes = 4.38
This machine benchmarks at 11415.5 pystones/second
FWIW /proc/cpuinfo on both:
Fedora
------
processor : 0
model name : ARMv7 Processor rev 2 (v7l)
BogoMIPS : 363.72
Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpd32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc08
CPU revision : 2
Hardware : Generic AM33XX (Flattened Device Tree)
Revision : 0000
Serial : 0000000000000000
Debian
------
processor : 0
model name : ARMv7 Processor rev 2 (v7l)
BogoMIPS : 198.72
Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc08
CPU revision : 2
Hardware : Generic AM33XX (Flattened Device Tree)
Revision : 0000
Serial : 0000000000000000
--
-- Jos Vos <jos(a)xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
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6 comments
3 participants
participants (3)
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Jos Vos -
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Travis Paul