[ts-7000] SD card very slow on TS-7260

["hamishavery" <>]

Hello fellow TS-72XX users,

I have a TS-7260 (64M ram, 64M flash) with the SD card option. 
Writing to the SD card is very slow.  I have the latest sdcard driver
from the ftp site, and run the TS11 kernel with the stock root
filesystem from the onboard flash that came with the TS-7260.  

Killing all unused applications and mounting only one of my three EXT2
partitions on the SD card (as sync), I get a write speed to the card
of around 8kB/s (from bonnie++) with a Kingston 256MB SD card, and at
best 16kB/s with a 512MB no-brand 60X SD card.  Furthermore, the
processor loading reported by bonnie++ is 99%.  I get around 800kB/s
doing the same test but writing to a network drive (NFS) at around 3% CPU.

I would like to know if anyone else has experienced this problem or
has any solutions.  Is it normal or is my system somehow wrong?  If
the latter, any ideas?  TS cannot replicate my problem, but equally I
cannot replicate their quoted 800kB/s write speed with the drive
mounted as sync.  I have also tried 1024 byte and 4096 byte block
sizes on the partitions too.

The relevent command lines are:

modprobe sdcard.o dmaenable=1

mount -t ext2 /dev/sdcard0/disc0/part1 /testmount -o rw,sync,noatime

Bonnie++ results:

                  -------Sequential Output--------   ---Sequential
Input-- --Random--
                  -Per Char-  --Block--- -Rewrite--  -Per Char-
--Block--- --Seeks---
Machine MB         K/sec %CPU K/sec %CPU K/sec %CPU  K/sec %CPU K/sec
%CPU  /sec %CPU
ts7000,128M:4k,         ,    ,  877,  2 ,  411,   4,      ,    ,  819,
  5, 74.1,  8, ... NFS MOUNT
CUSP3Clp,128M:4k,       ,    ,    8,  98,  243,  99,      ,    , 2146,
 98, 55.4, 99, ... SDCARD TEST

Kind regards and thanks for reading this

/Hamish Avery



 
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