On Thu, 22 Apr 2010 22:12:48 +0200, Daniel Vetter <daniel.vet...@ffwll.ch> wrote: > Hi all, > > This patch-set prevents stalls due to bo reuse in libdrm. After having > tried to fix the set_tiling stall both in libdrm and the kernel, I think > fixing this in the kernel is the better option: This way gem nicely > abstracts away the execution semantics. The only place where the > asynchronous nature of the gpu leaks is in the busy ioctl, which userspace > should call to check whether a mmap of the bo would stall. > > Performance gains are minimal, but strictly positive (neglecting a 1% noise > level). cairo perf traces on my i945: > > old: without-patches > new: with-patches > Speedups > ======== > xlib-rgba firefox-planet-gnome-0 62418.67 (64895.61 1.98%) -> > 57833.66 > (61105.65 2.92%): 1.08x speedup
That's a little better than what I see here, but there is just about some improvements over the noise. The patches themselves look worthwhile cleanups. -ickle -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
