On Mon, 9 Jul 2007, Oliver Neukum wrote: > Am Montag, 9. Juli 2007 schrieb Alan Stern: > > On Mon, 9 Jul 2007, Oliver Neukum wrote: > > > > > Am Freitag, 6. Juli 2007 schrieb Alan Stern: > > > > This patch (as929) adds usb_autopm_get_interface_burst() to the > > > > autosuspend programming interface. It is intended for situations > > > > where I/O events occur in bursts of activity; it reduces overhead by > > > > not cancelling the device's autosuspend timer. > > > > > > Do you have numbers on how many del/mod_timer cycles you need > > > to outweigh one timer firing needlessly? Under which circumstances should > > > this API be used? > > > > I don't have any hard numbers. In fact, I can't even think of a good > > way to get them. Do you have any suggestions? > > How about reading from a flash drive and measuring CPU utilization?
I'll try it, but I'm afraid the difference will be too small to show up. (Maybe that means it will be too small to worry about...) Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
