On 2011-09-13 10:18, Mark Salter wrote:
These numbers are for SD card in an mmc slot, right? I wouldn't
the patch to the USB EHCI driver to have any effect on SD card speed.
Oh, you're right. I ran bonnie++ against a USB hard drive and it shows
a whopping improvement!
I've edited my blog post and added the USB hard drive numbers:
The big write performance hits are worrisome, though. I'd be good
test on one kernel version with and without the patch just to make sure.
Also comparing SD performance with and without nosmp passed on cmdline
would be interesting.
Okay, so I should run 8 tests?
patch smp sd-card
patch smp usb-hd
patch nosmp sd-card
patch nosmp usb-hd
no-patch smp sd-card
no-patch smp usb-hd
no-patch nosmp sd-card
no-patch nosmp usb-hd