intel: increase wm thread number to 80 on gen6 GT2

It seems reset is not required for setting the max_wm_threads to 80
on gen6 GT2.

Increases performance in the Counter-Strike: Source video stress test
by 7.18% (n=5).

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Tested-by: Matt Turner <mattst88@gmail.com>
Acked-by: Eric Anholt <eric@anholt.net>

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index faca726..e23e224 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -256,11 +256,7 @@ brwCreateContext(int api,
       }
    } else if (intel->gen == 6) {
       if (intel->gt == 2) {
-        /* This could possibly be 80, but is supposed to require
-         * disabling of WIZ hashing (bit 6 of GT_MODE, 0x20d0) and a
-         * GPU reset to change.
-         */
-        brw->max_wm_threads = 40;
+        brw->max_wm_threads = 80;
         brw->max_vs_threads = 60;
         brw->max_gs_threads = 60;
         brw->urb.size = 64;            /* volume 5c.5 section 5.1 */