From dff7551bfdbdd6e57c13e523d7dcca317640e907 Mon Sep 17 00:00:00 2001 From: Ruben Ortlam Date: Wed, 3 Sep 2025 22:55:10 +0200 Subject: [PATCH] vulkan: fix mmv subgroup16 selection (#15775) --- ggml/src/ggml-vulkan/ggml-vulkan.cpp | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/ggml/src/ggml-vulkan/ggml-vulkan.cpp b/ggml/src/ggml-vulkan/ggml-vulkan.cpp index 2f86b22c4a..3cd5af1cdc 100644 --- a/ggml/src/ggml-vulkan/ggml-vulkan.cpp +++ b/ggml/src/ggml-vulkan/ggml-vulkan.cpp @@ -2937,9 +2937,7 @@ static void ggml_vk_load_shaders(vk_device& device) { const bool use_subgroups = device->subgroup_arithmetic && device->architecture != vk_device_architecture::AMD_GCN; // Ensure a subgroup size >= 16 is available - const bool use_subgroups16 = use_subgroups && - (!device->subgroup_size_control && device->subgroup_size >= 16 || - device->subgroup_size_control && device->subgroup_min_size <= 16 && device->subgroup_max_size >= 16); + const bool use_subgroups16 = use_subgroups && subgroup_min_size_16; const uint32_t subgroup_size = (device->vendor_id == VK_VENDOR_ID_INTEL && device->subgroup_size_control && device->subgroup_min_size <= 16 && device->subgroup_max_size >= 16) ? 16 : device->subgroup_size; const uint32_t subgroup_size16 = std::max(subgroup_size, 16u);