Re: [Qemu-devel] [PATCH] EHCI emulation module for review

[Mark Burkley]

On Sat, 1 Nov 2008 12:13:40 +0100, you wrote:

>Hello, have you done any benchmarking with this implementation? I have
>been playing with ohci and making some small changes to usb-ohci and
>usb-linux i have been able to obtain stable transfer rates of around
>13Mbps (thats bits not bytes). Using your patch  I am getting much
>lower transfer rates, which seems logical to me when looking at both
>specs. If you got better results ill try to haunt down the problem in
>my system.

Hi Daniel,

I haven't done any benchmarking yet - my focus was on functionality
initially.  It is possible that the async completion handling is
causing unnecesary delays.  The completion callback just sets a flag
which is picked up the next time the timer goes off.  Invoking the
state machine on a callback might be better - I'll take a look.

Mark