[Mesa-dev] [PATCH] radv: Optimize rebinding the same descriptor set.

[Bas Nieuwenhuizen]

Thsi makes it cheaper to just change the dynamic offsets with
the same descriptor sets.

Suggested-by: Philip Rebohle <philip.rebohle at tu-dortmund.de>
---
 src/amd/vulkan/radv_cmd_buffer.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index d492456d6b8..2f168321197 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -2464,7 +2464,13 @@ void radv_CmdBindDescriptorSets(
 	for (unsigned i = 0; i < descriptorSetCount; ++i) {
 		unsigned idx = i + firstSet;
 		RADV_FROM_HANDLE(radv_descriptor_set, set, pDescriptorSets[i]);
-		radv_bind_descriptor_set(cmd_buffer, pipelineBindPoint, set, idx);
+
+		/* If the set is already bound we only need to update the
+		 * (potentially changed) dynamic offsets. */
+		if (descriptors_state->sets[idx] != set ||
+		    !(descriptors_state->valid & (1u << idx))) {
+			radv_bind_descriptor_set(cmd_buffer, pipelineBindPoint, set, idx);
+		}
 
 		for(unsigned j = 0; j < set->layout->dynamic_offset_count; ++j, ++dyn_idx) {
 			unsigned idx = j + layout->set[i + firstSet].dynamic_offset_start;
-- 
2.19.0