From: Eric Anholt <eric@anholt.net>
Date: Wed, 23 Apr 2014 20:45:22 +0000 (-0700)
Subject: i965: Don't bother flushing the batch if it doesn't ref our mt to map.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=07730e9463637a62e41a9783374102b4181ba960;p=mesa.git

i965: Don't bother flushing the batch if it doesn't ref our mt to map.

-1.1372% +/- 0.858033% effect on cairo runtime on glamor (n=175).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 59700ed8b17..c24cfcea4bc 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1614,7 +1614,8 @@ intel_miptree_map_raw(struct brw_context *brw, struct intel_mipmap_tree *mt)
 
    drm_intel_bo *bo = mt->region->bo;
 
-   intel_batchbuffer_flush(brw);
+   if (drm_intel_bo_references(brw->batch.bo, bo))
+      intel_batchbuffer_flush(brw);
 
    if (mt->region->tiling != I915_TILING_NONE)
       brw_bo_map_gtt(brw, bo, "miptree");