Hi,
U-boot reads my SD card with a speed of less then 1 MB/s.
This is the log from extraPutty for my kernel image:
[30:208][35:648] 5025176 bytes read in 5389 ms (910.2 KiB/s)
I find similar results from other people.
When I read the same file in a shell with dd I get a speed of 20 MB/s.
Clear the cache:
echo 3 > /proc/sys/vm/drop_caches
Read file from the /boot directory:
dd if=zImage of=/dev/null 9814+1 records in 9814+1 records out 5025176 bytes (5.0 MB) copied, 0.246444 s, 20.4 MB/s
This is the result I expect because the hardware is SD v2. (25 MB/s)
Goal: Faster boot by increasing the SD card read speed of U-boot.
Question: How to do this?
Any remark is appreciated.
Regards,
Bor.