(2015-05-02, 03:36)jjslegacy Wrote: I will have to switch to an older build to test write performance as I don't think it will show to well with all the slowness.
#0428 doesn't have any of the new SD driver code. #0429 is when the new driver first appeared (but wasn't entirely safe to use).
I've been able to reproduce the very slow performance in #0501 with dtoverlay=sdhost disabled on a Pi1, however I'm not seeing the same slow performance on a Pi2, so this seems to be Pi1 specific. What's also weird, is that my Pi1 is only using the SD card for /flash, with /system mounted from a USB memory stick.
hdparm on the Pi1 indicates a read performance of 10.04MB/s with the old driver, 16.59MB/s with the new driver (Model B Pi1, 2GB Transcend microSD card in full-size adapter, no Class markings - might pre-date that system...).
Actually, dmesg doesn't look at all healthy on this Pi1 when booting #0501 with the old driver - this would explain the slow booting:
http://sprunge.us/SBJO (
config.txt,
cmdline.txt)
dmesg is clean when booting with the new driver:
http://sprunge.us/cQGN
(2015-05-02, 03:36)jjslegacy Wrote: It looks like the arm_freq is changing so not sure why the message.
I've tried booting a Pi1 and a Pi2 with your config.txt, and I can reproduce the "Unknown param 'arm_freq' - ignored" message with a Pi1, but not the Pi2. Odd.