On Mon, 9 Oct 2006, Christopher "Monty" Montgomery wrote: > > But suppose you look at the clock and the clock isn't definitive one way > > or the other? > > Well, the clock would be definitive, just pessimistic. The worst case > is being too pessimistic by 125uSec, since most of the submissions > will be happening inside the interrupt handler and thus will be > running un-preemptible (am I correct here?). 125uSec I am more than > willing to live with.
So you're saying if the current uframe is N when you receive an URB whose first slot belongs in uframe N+1, then you have to reject it, right? Meaning that every URB has to be submitted as much as 250 us in advance. What about other host controllers? A full-speed controller uses 1-ms frames. Are you willing to live with up to 2 ms of pessimism? Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
