[Mesa-dev] [PATCH 1/3] llvmpipe: tweak CMD_BLOCK_MAX and LP_SCENE_MAX_SIZE
brianp at vmware.com
Mon Mar 4 14:04:40 PST 2013
We advertise a max texture/surfaces size of 8K x 8K but the old values
for these limits didn't actually allow us to handle that surface size.
For 8K x 8K we'll have 16384 bins. Each bin needs at least one cmd_block
object which was 2192 bytes in size. Since 16384 * 2192 exceeded
LP_SCENE_MAX_SIZE we'd silently fail in lp_scene_new_data_block() and not
draw the complete scene.
By reducing CMD_BLOCK_MAX to 29 we get nice 512-byte cmd_blocks. And
by increasing LP_SCENE_MAX_SIZE to 9 MB we can allocate enough command
blocks for 8K x 8K, plus a few regular data blocks.
Fixes the (improved) piglit fbo-maxsize test.
Note: This is a candidate for the stable branches.
src/gallium/drivers/llvmpipe/lp_scene.h | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/llvmpipe/lp_scene.h b/src/gallium/drivers/llvmpipe/lp_scene.h
index b1db61b..801829d 100644
@@ -49,12 +49,18 @@ struct lp_rast_state;
#define TILES_Y (LP_MAX_HEIGHT / TILE_SIZE)
-#define CMD_BLOCK_MAX 128
+/* Commands per command block (ideally so sizeof(cmd_block) is a power of
+ * two in size.)
+#define CMD_BLOCK_MAX 29
+/* Bytes per data block.
#define DATA_BLOCK_SIZE (64 * 1024)
/* Scene temporary storage is clamped to this size:
-#define LP_SCENE_MAX_SIZE (4*1024*1024)
+#define LP_SCENE_MAX_SIZE (9*1024*1024)
/* The maximum amount of texture storage referenced by a scene is
* clamped ot this size:
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