Re: [Discuss-gnuradio] max capacity per USB channel

[Eric Blossom]

On Mon, Apr 09, 2007 at 03:14:12PM -0400, George Nychis wrote:
> 
> 
> Eric Blossom wrote:
> 
> >George, it's not a max capacity per channel, it's a maximum aggregate
> >capacity across all data channels (input and output).  Use 32MB/s as
> >the maximum capacity.  Ignore the control channel contribution.
> >
> >USB is half-duplex, that's why it's the aggregate across the input +
> >output channels.
> 
> Got ya.  And each channel is associated with a single reservation.  In 
> other words, if there were 30 requests of .5MB each, even though there is 
> spare capacity it can no longer be allocated until a channel is deallocated 
> first?  This is not to say the capacity won't be used, but there are no 
> more channels to allocate.

Uhh, 30 requests of .5 is only 15MB/s, so there would be no problem
with additional requests up to an additional 17MB/s.  The tx and rx
channels are allocated indepently of each other, though all capacity
requests are changed against the same pool.

Eric