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radv/rt: Only do ploc atomicCompSwap once per workgroup

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There is no need to do this for every invocation in the wave.

Improves GravityMark scores by 5%.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30483>
This commit is contained in:
Friedrich Vock 2024-08-02 08:20:13 +02:00 • committed by Marge Bot
parent 7983c6c14d
commit a3df3ebab4
1 changed files with 10 additions and 4 deletions
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14
src/amd/vulkan/bvh/ploc_internal.comp
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@ -216,10 +216,16 @@ main(void)
return;
}
atomicCompSwap(DEREF(args.header).sync_data.task_counts[0], 0xFFFFFFFF,
DEREF(args.header).active_leaf_count);
atomicCompSwap(DEREF(args.header).sync_data.current_phase_end_counter, 0xFFFFFFFF,
DIV_ROUND_UP(DEREF(args.header).active_leaf_count, gl_WorkGroupSize.x));
/* Only initialize sync_data once per workgroup. For intra-workgroup synchronization,
* fetch_task contains a workgroup-scoped control+memory barrier.
*/
if (gl_LocalInvocationIndex == 0) {
atomicCompSwap(DEREF(args.header).sync_data.task_counts[0], 0xFFFFFFFF,
DEREF(args.header).active_leaf_count);
atomicCompSwap(DEREF(args.header).sync_data.current_phase_end_counter, 0xFFFFFFFF,
DIV_ROUND_UP(DEREF(args.header).active_leaf_count, gl_WorkGroupSize.x));
}
REF(ploc_prefix_scan_partition)
partitions = REF(ploc_prefix_scan_partition)(args.prefix_scan_partitions);