radv: allocate only 1 GDS OA counter for gfx10 NGG streamout

It works with just one counter.

This mitigates https://gitlab.freedesktop.org/drm/amd/-/issues/2902
quite a lot when you run dEQP-VK.transform_feedback.* in parallel on
more than 16 threads with RDNA3.

For example, on my GPU the kernel reports 16 GDS OA counters which means
that if you run VKCTS with 16 threads (ie. 16 Vulkan devices are
created) it's fine. Otherwise, the kernel might report ENOMEM.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25619>

diff --git a/src/amd/vulkan/radv_queue.c b/src/amd/vulkan/radv_queue.c
index d93fdaf..816a96c 100644 (file)
--- a/src/amd/vulkan/radv_queue.c
+++ b/src/amd/vulkan/radv_queue.c
@@ -953,7 +953,7 @@ radv_update_preamble_cs(struct radv_queue_state *queue, struct radv_device *devi
    if (!queue->ring_info.gds_oa && needs->gds_oa) {
       assert(device->physical_device->rad_info.gfx_level >= GFX10);
 
-      result = ws->buffer_create(ws, 4, 1, RADEON_DOMAIN_OA, ring_bo_flags, RADV_BO_PRIORITY_SCRATCH, 0, &gds_oa_bo);
+      result = ws->buffer_create(ws, 1, 1, RADEON_DOMAIN_OA, ring_bo_flags, RADV_BO_PRIORITY_SCRATCH, 0, &gds_oa_bo);
       if (result != VK_SUCCESS)
          goto fail;