Hi Eric, On Fri, 2004-11-05 at 07:36 -0800, 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. > > > In case you find the time to make this test, I'd be eager to know about > > the results. > > I'll see what I can do.
Meanwhile, I got 2 more of my camera devices to play with and got the following (somewhat exiting) results. All tests where performed with my patched fx2_programmer and the ex3.c test firmware. 1 FX2 connected: 1 * 32 MB/sec (means 32 million bytes) 2 FX2 connected: 2 * 24 MB/sec 3 FX2 connected: 3 * 16 MB/sec Looks like there is a saturation at around 48 MB/sec. I am completely happy with that. The earlier mentioned maximum 54 MB/sec, were they meant to be mega bytes or million bytes? Axel ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
