Re: [Mesa-dev] [Intel-gfx] [PATCH] drm/i915: Enable the HiZ RAW Stall Optimization on Gen8.

2015-01-12 Thread Ville Syrjälä
On Sun, Jan 11, 2015 at 07:14:57PM -0800, Ben Widawsky wrote: On Sun, Jan 11, 2015 at 07:05:21PM -0800, Kenneth Graunke wrote: On Sunday, January 11, 2015 05:46:09 PM Ben Widawsky wrote: On Sun, Jan 11, 2015 at 04:05:25PM -0800, Kenneth Graunke wrote: On Sunday, January 11, 2015 01:49:41

Re: [Mesa-dev] [Intel-gfx] [PATCH] drm/i915: Enable the HiZ RAW Stall Optimization on Gen8.

2015-01-12 Thread Ville Syrjälä
On Sat, Jan 10, 2015 at 06:44:49PM -0800, Kenneth Graunke wrote: This is an important optimization for avoiding read-after-write (RAW) stalls in the HiZ buffer. Certain workloads would run very slowly with HiZ enabled, but run much faster with the hiz=false driconf option. With this patch,

Re: [Mesa-dev] [Intel-gfx] [PATCH] drm/i915: Enable the HiZ RAW Stall Optimization on Gen8.

2015-01-12 Thread Kenneth Graunke
On Monday, January 12, 2015 02:32:20 PM Ville Syrjälä wrote: On Sat, Jan 10, 2015 at 06:44:49PM -0800, Kenneth Graunke wrote: This is an important optimization for avoiding read-after-write (RAW) stalls in the HiZ buffer. Certain workloads would run very slowly with HiZ enabled, but run

Re: [Mesa-dev] [Intel-gfx] [PATCH] drm/i915: Enable the HiZ RAW Stall Optimization on Gen8.

2015-01-12 Thread Ben Widawsky
On Mon, Jan 12, 2015 at 02:02:34PM +0200, Ville Syrjälä wrote: On Sun, Jan 11, 2015 at 07:14:57PM -0800, Ben Widawsky wrote: On Sun, Jan 11, 2015 at 07:05:21PM -0800, Kenneth Graunke wrote: On Sunday, January 11, 2015 05:46:09 PM Ben Widawsky wrote: On Sun, Jan 11, 2015 at 04:05:25PM