On Tue, Dec 01, 2015 at 04:57:11PM +0000, Dave Gordon wrote: > On 29/11/15 08:48, Chris Wilson wrote: > >We have testcases to ensure that seqno wraparound works fine, so we can > >forgo forcing everyone to encounter seqno wraparound during early > >uptime. seqno wraparound incurs a full GPU stall so not forcing it > >will eliminate one jitter from the early system. > > > >Advancing the global next_seqno after a GPU reset is equally pointless. > > > >Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > The real bug is that seqno wraparound forces GPU idle, can we fix that > instead? hw semaphores will fall over if we don't, but I guess we can forgo the idle if there's no hw semaphores enabled. And yeah I'd like to keep this little trick to exercise wrap-around more often too. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
