On Thu, 9 Jun 2005, Pete Zaitcev wrote: > OK, here is the interesting part of the trace. > > Up to this point, something hits the UPS with control messages every 4ms > (sounds crazy, but here it is: the daemon is obviously out of control).
Weird. Those 4 ms delays are just the time it takes the UPS to respond to the requests. As far as I can see, each completion is followed almost immediately by another submission. Does anybody know what's going on here? > > c21ed160 2336523562 S Ci:002:00 -115 8 D > <---- Control submission without completion > > c21ed1e0 2337061533 C Ii:002:01 0 3 D > > c21ed1e0 2337061550 S Ii:002:01 -115 3 D > <----- Pretty big gap, 3.5s > > c21ed1e0 2340357664 C Ii:002:01 0 3 D > > c21ed1e0 2340357681 S Ii:002:01 -115 3 D > > From now on it's only interrupt requests ending, about every 8ms or so. > This also sounds pretty wild. > > Unfortunately, current usbmon cannot tell if usbfs tried to unlink > the stuck control. I'll work on it. Christian, if you're using a UHCI controller like Martin then you could try getting the debug information in the same way. Just follow the instructions given in http://marc.theaimsgroup.com/?l=linux-usb-devel&m=111815597814608&w=2 That will tell us what the host controller thinks is going on with the "stuck" control URB. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
