On Tuesday November 15, [EMAIL PROTECTED] wrote: > > > > I'll leave it up to you to decide if it should be submitted to > > mainline. > > Not just now.
Fine. > > Can you get a usbmon log showing your change in action? It would be > interesting to see the time intervals involved. I've got piles of usbmon logs, and I'm happy to create more. Could you be specific about that would help, and different setting show different things differently :-) For example, I have a rather nice log with 64 byte writes (so there is one packet per UDB). If I take the completion time stamps, find the remainder after dividing by 111838(microseconds) and graph that I get a really interesting graph!! I cannot explain all the features, but I'm sure they correlate significantly to some aspect of the printer hardware I guess the question is what size write request would be most helpful. 8192bytes means there is plenty of opportunity for FSBR to push lots of packets out, but it means that each record reported by usbmon corresponds to 128 packets, so you lose a lot of detail. 64bytes gives more detail, but with less chance for FSBR to have an effect (as usblp only submits one URB at a time). Maybe 512 would be a reasonable compromise? > > It would also be worthwhile to see if you can get more or less the same > effect without all those changes, just by increasing IDLE_TIMEOUT to 1000 > ms or something like that. I did get similar throughput with IDLE_TIMEOUT set to 50000. 1000 wouldn't be enough with 8K writes, as an 8K write often takes more than one second. But I'm happy to redo some tests to be able to give you clear before/after results. It'll probably have to wait a week or so, as I've spent more time on this that I really should have lately. NeilBrown ------------------------------------------------------- This SF.Net email is sponsored by the JBoss Inc. Get Certified Today Register for a JBoss Training Course. Free Certification Exam for All Training Attendees Through End of 2005. For more info visit: http://ads.osdn.com/?ad_id=7628&alloc_id=16845&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
