Re: What to do with all of the USB UHCI drivers in the kernel?

Peter Osterlund
2002-05-23T18:17:05Z

Greg KH <greg@kroah.com> writes:

> Let me (and the linux-usb-devel list) know about any thoughts you have
> pertaining to liking one of the drivers over the other one. Speed
> tests, size tests, code pretty tests, comment spelling tests,
> documentation tests, you name it, I want to know about it. If you
> don't want your comments to be public, send them to me directly and I
> will not let anyone else know what you said, but will use the info to
> try to pick which one should stay.

I did a simple test reading a bunch of files from a Freecom CDRW
drive.

usb-uhci-hcd 17840 0 (unused)

pengo:/cdrw$ time wc petero/mp3/madonna/*
...
188462 1091976 50386286 total

real 1m24.930s
user 0m10.440s
sys 0m1.360s

uhci-hcd 24608 0 (unused)

pengo:/cdrw$ time wc petero/mp3/madonna/*
...
188462 1091976 50386286 total

real 1m33.095s
user 0m12.670s
sys 0m11.870s

So the usb-uhci-hcd driver is 27% smaller, gives a 10% higher transfer
rate and produces less system load during the data transfers. (About
70% idle time versus 50% idle time on my 233MHz MMX system.)

--
Peter Osterlund - petero2@telia.com