Interesting. It's the kind of test I want to implement : comparing
Xenomai on Flash and SD card .
Is it still better with writes operations ?
Le 16/05/2014 18:38, Robert Nelson a écrit :
On Fri, May 16, 2014 at 11:31 AM, David Lewin <dlewin...@gmail.com
<mailto:dlewin...@gmail.com>> wrote:
Hi,
not as I wanted, ie: using the eMMC to have the best timing as
possible.
Even with the 8-bit interface, the eMMC is not always the best performer.
(/dev/mmcblk0 is SanDisk Ultra's in this test)
root@arm:/home/debian# hdparm -tT /dev/mmcblk0
/dev/mmcblk0:
Timing cached reads: 444 MB in 2.00 seconds = 221.64 MB/sec
Timing buffered disk reads: 58 MB in 3.06 seconds = 18.97 MB/sec
root@arm:/home/debian# hdparm -tT /dev/mmcblk1
/dev/mmcblk1:
Timing cached reads: 420 MB in 2.01 seconds = 209.43 MB/sec
Timing buffered disk reads: 36 MB in 3.10 seconds = 11.62 MB/sec
Regards,
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Robert Nelson
http://www.rcn-ee.com/
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