https://bugs.freedesktop.org/show_bug.cgi?id=38800 --- Comment #33 from Simon Farnsworth <simon.farnsworth@xxxxxxxxxxxx> 2011-07-07 10:46:36 PDT --- (In reply to comment #31) > (In reply to comment #30) > > So wait for bo to be idle before waiting to be out of vblank > > Bad idea I'm afraid: Consider the case where the ioctl is called outside of > vblank, but by the time the BO is idle we're in vblank. We'd need to (probably > needlessly) wait for a full frame before the flip takes effect. Against that, and arguing in favour of Jerome's method: if userspace is submitting enough rendering that the BO goes idle just as vblank starts, it's already on a performance knife-edge. We're just arguing about which way to push you if you're already on that knife-edge. As Jerome's method is guaranteed to at least accurately report the timestamps of page flips, it's probably the right way to push you; I've been caught up in other issues today, but I'll try to code up an RFC patch for Jerome's idea tomorrow. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
