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vulkan: avoid preferring transfer queue on AMD UMA devices #22455

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Merged
0cc4m merged 1 commit into from
May 27, 2026
Merged

vulkan: avoid preferring transfer queue on AMD UMA devices #22455

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8 changes: 6 additions & 2 deletions ggml/src/ggml-vulkan/ggml-vulkan.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5768,8 +5768,12 @@ static vk_device ggml_vk_get_device(size_t idx) {

ggml_vk_load_shaders(device);

// Only use transfer queue on AMD non-GCN, when the graphics queue is not enabled
const bool prefers_transfer_queue = device->vendor_id == VK_VENDOR_ID_AMD && device->architecture != AMD_GCN && !allow_graphics_queue;
// Prefer a dedicated transfer queue on AMD dGPUs (non-GCN) when graphics queue use is disabled.
const bool prefers_transfer_queue =
device->vendor_id == VK_VENDOR_ID_AMD &&
device->architecture != AMD_GCN &&
!device->uma &&
!allow_graphics_queue;

if (!device->single_queue) {
const uint32_t transfer_queue_index = compute_queue_family_index == transfer_queue_family_index ? 1 : 0;
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