From 78e1bc6ceaa57801bb9510ffc28c6335d055e9f6 Mon Sep 17 00:00:00 2001 From: 0cc4m Date: Mon, 1 Sep 2025 15:29:42 +0000 Subject: [PATCH] vulkan: disable large mmv subgroups on older Nvidia GPUs --- ggml/src/ggml-vulkan/ggml-vulkan.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ggml/src/ggml-vulkan/ggml-vulkan.cpp b/ggml/src/ggml-vulkan/ggml-vulkan.cpp index 4057ce8556f23..3ac459bc4f65f 100644 --- a/ggml/src/ggml-vulkan/ggml-vulkan.cpp +++ b/ggml/src/ggml-vulkan/ggml-vulkan.cpp @@ -4662,7 +4662,7 @@ static vk_pipeline ggml_vk_get_dequantize_mul_mat_vec(ggml_backend_vk_context * // heuristic to choose workgroup size uint32_t dmmv_wg = DMMV_WG_SIZE_SUBGROUP; - if (ctx->device->vendor_id == VK_VENDOR_ID_NVIDIA || ctx->device->vendor_id == VK_VENDOR_ID_INTEL) { + if ((ctx->device->vendor_id == VK_VENDOR_ID_NVIDIA && ctx->device->architecture != vk_device_architecture::NVIDIA_PRE_TURING) || ctx->device->vendor_id == VK_VENDOR_ID_INTEL) { // Prefer larger workgroups when M is small, to spread the work out more // and keep more SMs busy. // q6_k seems to prefer small workgroup size even for "medium" values of M.