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radv/rt: Divide by the correct workgroup size

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Improves build performance by around 25%.

Fixes: 9369b407 ("radv: Use PLOC for BVH building")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20717>
(cherry picked from commit eab2c39951)
This commit is contained in:
Friedrich Vock 2023-01-15 21:54:50 +01:00 • committed by Eric Engestrom
parent c1a38fed99
commit 893910b353
2 changed files with 3 additions and 2 deletions
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2
.pick_status.json
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@ -5098,7 +5098,7 @@
"description": "radv/rt: Divide by the correct workgroup size",
"nominated": true,
"nomination_type": 1,
"resolution": 0,
"resolution": 1,
"main_sha": null,
"because_sha": "9369b407250b089d54e2247a7c8c10c65188c551"
},

3
src/amd/vulkan/radv_acceleration_structure.c
View file

@ -757,7 +757,8 @@ ploc_build_internal(VkCommandBuffer commandBuffer, uint32_t infoCount,
radv_CmdPushConstants(commandBuffer,
cmd_buffer->device->meta_state.accel_struct_build.ploc_p_layout,
VK_SHADER_STAGE_COMPUTE_BIT, 0, sizeof(consts), &consts);
radv_CmdDispatch(commandBuffer, MAX2(DIV_ROUND_UP(bvh_states[i].node_count, 64), 1), 1, 1);
radv_CmdDispatch(commandBuffer,
MAX2(DIV_ROUND_UP(bvh_states[i].node_count, PLOC_WORKGROUP_SIZE), 1), 1, 1);
}
}