From: Zou Nan hai <nanhai.zou@intel.com>
Date: Wed, 2 Mar 2011 06:23:17 +0000 (+0800)
Subject: i965: Maxinum the usage of urb space on SNB.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f1824905faad6831edee6cf35cb8fa389ef3852a;p=mesa.git

i965: Maxinum the usage of urb space on SNB.
      SNB has 64k urb space, we only use piece of them.
      The more urb space we alloc,
      the more concurrent vs threads we can run.
      push the urb space usage to the limit.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
---

diff --git a/src/mesa/drivers/dri/i965/gen6_urb.c b/src/mesa/drivers/dri/i965/gen6_urb.c
index fc46c4cb79e..57be50a4451 100644
--- a/src/mesa/drivers/dri/i965/gen6_urb.c
+++ b/src/mesa/drivers/dri/i965/gen6_urb.c
@@ -34,19 +34,15 @@
 static void
 prepare_urb( struct brw_context *brw )
 {
-   brw->urb.nr_vs_entries = 24;
-   if (brw->gs.prog_bo)
-      brw->urb.nr_gs_entries = 4;
-   else
-      brw->urb.nr_gs_entries = 0;
+   brw->urb.nr_vs_entries = 256;
+   brw->urb.nr_gs_entries = 256;
+
    /* CACHE_NEW_VS_PROG */
    brw->urb.vs_size = MAX2(brw->vs.prog_data->urb_entry_size, 1);
 
-   /* Check that the number of URB rows (8 floats each) allocated is less
-    * than the URB space.
-    */
-   assert((brw->urb.nr_vs_entries +
-	   brw->urb.nr_gs_entries) * brw->urb.vs_size * 8 < 64 * 1024);
+   if (256 * brw->urb.vs_size > 64 * 1024)
+	   brw->urb.nr_vs_entries = brw->urb.nr_gs_entries = 
+		(64 * 1024 ) / brw->urb.vs_size;
 }
 
 static void