Re: [9fans] usbether

[Gorka Guardiola <paurea@gmail.com>]

On Sat, Sep 29, 2012 at 6:16 PM, Richard Miller <9fans@hamnavoe.com> wrote:
> So, has anyone had success using usbether to connect a plan 9 system
> to the outside world?  I am hoping someone can give me an encouraging
> report.  I'm a bit worried that it's a fundamental problem with the
> plan 9 usb architecture, which is basically synchronous - the host
> adapter driver in the kernel will poll a device for input only when
> the user-level driver process does a read.  This is ok for things like
> usbdisk which have an rpc-like protocol, but seems less well suited to
> things like ethernet and serial interfaces, where the equivalent
> non-usb kernel drivers use qio to read ahead into a queue of buffers
> until the user-level consuming process gets around to reading them.
>
> Would anyone like to share experiences or comments?
>
>

I had a similar problem with serial a while ago. The problem was that
it was taking too long doing too many system calls, doing big reads
and buffering may help you?

G.