On Friday 05 November 2004 07:36, Eric Blossom wrote: > On Fri, Nov 05, 2004 at 10:44:36AM +0100, Axel Waggershauser wrote: > > So, if the total throughput with 2 devices happens to be 32MB/sec as > > well, I'd conclude that there is no controller available with a higher > > throughput. I would hope for a total throughput of as near to 60MB/sec > > as possible :-). > > You'll never get 60MB/sec. The raw USB capacity is 480 Mbit/sec, but > there is some minimum overhead on the order of 10%. You can work it > out from the specs. IIRC, the best you can do in theory is about > 54MB/sec.
I think that it's 52MB/sec for bulk traffic (512 byte packets), but if you throw in 1024 byte periodic (isochronous or interrupt) transfers, more aggregate bandwith is available. And yes, so long as the endpoint queue is never empty, there's not a lot more that the host controller can do. - Dave ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
