Hi Eric, On Fri, 2004-10-29 at 12:51 -0700, Eric Blossom wrote: > On Fri, Oct 29, 2004 at 01:06:34PM +0200, Axel Waggershauser wrote: > > another question: Have you tried accessing two devices at the same time? > > If so, what was your total throughput per sec?
> I haven't, but I'll give it a try over the next couple of days and let > you know what happens. I don't expect a problem. Meanwhile, I tested my patched fx2_programmer on an onboard Intel controller and reached the 32MB/sec as well. Now I am still wondering what happens when two devices are accessed at the same time (unfortunately I don't have two of these FX2 based cameras available at the moment). If you are right about the controller being in general the bottleneck, that would mean a "true kernel space" driver would not perform any better and there might not even be any device/controller combination with a higher throughput than those 32MB/sec available at the moment. Has anybody any information about what is actually possible with currently available hardware? There is of course another possibility: maybe the FX2 is the bottleneck here. 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 :-). In case you find the time to make this test, I'd be eager to know about the results. Thanks, Axel ------------------------------------------------------- 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
