llvmpipe: use single swizzled tile

Use a single swizzled tile per colorbuf (and per thread) to avoid
accumulating large amounts of cached swizzled data.

Now that the SSE3 code has been merged to master, the performance delta
of this change is minimal, the main benefit is reduced memory usage
due to no longer keeping swizzled copies of render targets.

It's clear from the performance of the in-place version of this code
that there is still quite a bit of time being spent swizzling &
unswizzling, but it's not clear exactly how to reduce that.

1 files changed, 1 insertions, 15 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_setup.c b/src/gallium/drivers/llvmpipe/lp_setup.c
index 7d48ad8e741..556e571585d 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup.c
@@ -280,20 +280,6 @@ lp_setup_flush( struct lp_setup_context *setup,
    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 
    if (setup->scene) {
-      struct lp_scene *scene = lp_setup_get_current_scene(setup);
-      union lp_rast_cmd_arg dummy = {0};
-
-      if (flags & (PIPE_FLUSH_SWAPBUFFERS |
-                   PIPE_FLUSH_FRAME)) {
-         /* Store colors in the linear color buffer(s).
-          * If we don't do this here, we'll end up converting the tiled
-          * data to linear in the texture_unmap() function, which will
-          * not be a parallel/threaded operation as here.
-          */
-         lp_scene_bin_everywhere(scene, lp_rast_store_linear_color, dummy);
-      }
-
-
       if (fence) {
          /* if we're going to flush the setup/rasterization modules, emit
           * a fence.
@@ -642,7 +628,7 @@ lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
 
                if (!jit_tex->data[j]) {
                   /* out of memory - use dummy tile memory */
-                  jit_tex->data[j] = lp_get_dummy_tile();
+                  jit_tex->data[j] = lp_dummy_tile;
                   jit_tex->width = TILE_SIZE;
                   jit_tex->height = TILE_SIZE;
                   jit_tex->depth = 1;