On 03-08-09 13:08, zuowenping wrote:
I am testing the speed of sd/mmc in dm355 which using kernel 2.6.18.
bash-3.00# mount /dev/mmcblk0p1 /mnt -o sync
bash-3.00# time cp /tmp/ramdisk.img.gz /mnt/
That's not testing how fast the sd card is, that's testing how sucky the
interaction between the
： 2009-08-04 14:32:34
收件人： davinci-linux-open-source@linux.davincidsp.com
抄送：
主题： Re: why is the sd/mmc so slowly in writing about dm355?
On 03-08-09 13:08, zuowenping wrote:
I am testing the speed of sd/mmc in dm355 which using kernel 2.6.18.
bash-3.00# mount /dev/mmcblk0p1 /mnt -o sync
bash
On Mon, 2009-08-03 at 19:08 +0800, zuowenping wrote:
I am testing the speed of sd/mmc in dm355 which using kernel 2.6.18.
bash-3.00# mount /dev/mmcblk0p1 /mnt -o sync
bash-3.00# time cp /tmp/ramdisk.img.gz /mnt/
real0m19.996s
user0m0.000s
sys 0m0.960s
bash-3.00# ls -l
thansk Steve Chen a lot! I am testing with a sd card(ScanDisk 1.0G)!
2009-08-03
zuowenping
发件人： Steve Chen
发送时间： 2009-08-03 19:21:12
收件人： zuowenping
抄送： davinci-linux-open-source
主题： Re: why is the sd/mmc so slowly in writing about dm355?
On Mon, 2009-08-03 at 19:08 +0800
-open-source-boun...@linux.davincidsp.com
[mailto:davinci-linux-open-source-boun...@linux.davincidsp.com] On Behalf Of
zuowenping
Sent: Monday, August 03, 2009 5:02 PM
To: Steve Chen
Cc: davinci-linux-open-source
Subject: Re: Re: why is the sd/mmc so slowly in writing about dm355?
thansk Steve
is the sd/mmc so slowly in writing about dm355?
thansk Steve Chen a lot! I am testing with a sd card(ScanDisk 1.0G)!
IIRC single block command affects MMC but not SD. I did a few quick
tests with a HP 2G SD card on the my DM355 EVM, and the console output
are below.
r...@192.168.40.102:~# dd
less than 300k!my sd is scandisk ultra-ii,why so slow?
2009-08-04
zuowenping
发件人： Steve Chen
发送时间： 2009-08-03 22:39:02
收件人： Vipin
抄送： 'zuowenping'; 'davinci-linux-open-source'
主题： RE: Re: why is the sd/mmc so slowly in writing about dm355?
On Mon, 2009-08-03 at 18:09 +0530, Vipin
