vulkan: subgroup size test

Author: daniandtheweb

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -1423,6 +1423,49 @@ static bool ggml_vk_matmul_shmem_support(const vk_device& device, const std::vec
     return supported;
 }
 
+struct GpuPipelineConfig {
+    // List of all aliases for a given GPU.
+    // For example, this can include names like "NAVI10", "RX 5700", etc.
+    std::vector<std::string> device_names;
+
+    // Mapping of pipeline names to their specific subgroup sizes.
+    // Example: {"soft_max_f32", 64}.
+    std::unordered_map<std::string, uint32_t> pipelines;
+
+    // Default subgroup size for this GPU.
+    // Defaults to 0 if not explicitly provided.
+    uint32_t default_subgroup_size = 0;
+};
+
+// Define configurations for different GPUs.
+static std::vector<GpuPipelineConfig> gpu_pipeline_configs = {
+    {
+        {"NAVI10", "NAVI14", "RX 5700", "RX 5600", "RX 5500"},
+        {
+            {"soft_max_f32", 64}, {"soft_max_f32_wg512", 64},
+            {"soft_max_f32_f16", 64}, {"soft_max_f32_f16_wg512", 64},
+            {"im2col_f32", 64}, {"im2col_f32_f16", 64},
+        },
+        32
+    },
+};
+
+static uint32_t get_subgroup_size(const std::string &pipeline_name, const std::string &device_name) {
+    for (const auto &config : gpu_pipeline_configs) {
+        for (const auto &alias : config.device_names) {
+            if (device_name.find(alias) != std::string::npos) {
+                auto pipIt = config.pipelines.find(pipeline_name);
+                if (pipIt != config.pipelines.end() && pipIt->second != 0) {
+                    return pipIt->second;
+                }
+                return config.default_subgroup_size;
+            }
+        }
+    }
+    // If no matching configuration is found, return 0.
+    return 0;
+}
+
 static void ggml_vk_load_shaders(vk_device& device) {
     VK_LOG_DEBUG("ggml_vk_load_shaders(" << device->name << ")");
 
@@ -1543,11 +1586,17 @@ static void ggml_vk_load_shaders(vk_device& device) {
         device->pipeline_matmul_id_f32 = std::make_shared<vk_matmul_pipeline_struct>();
     }
 
+    vk::PhysicalDeviceProperties2 props2;
+    device->physical_device.getProperties2(&props2);
+    std::string device_name = props2.properties.deviceName.data();
+
     std::vector<std::future<void>> compiles;
     auto const &ggml_vk_create_pipeline = [&](vk_device& device, vk_pipeline& pipeline, const std::string &name, size_t spv_size, const void* spv_data, const std::string &entrypoint,
                                               uint32_t parameter_count, uint32_t push_constant_size, std::array<uint32_t, 3> wg_denoms, const std::vector<uint32_t>& specialization_constants,
                                               uint32_t align, bool disable_robustness = false, bool require_full_subgroups = false, uint32_t required_subgroup_size = 0) {
 
+        required_subgroup_size = get_subgroup_size(name, device_name);
+
         if (!pipeline) {
             pipeline = std::make_shared<vk_pipeline_struct>();
             pipeline->name = name;
@@ -2699,7 +2748,9 @@ static void ggml_vk_print_gpu_info(size_t idx) {
     subgroup_props.pNext = &driver_props;
     physical_device.getProperties2(&props2);
 
-    const size_t subgroup_size = subgroup_props.subgroupSize;
+    uint32_t default_subgroup_size = get_subgroup_size("", props2.properties.deviceName.data());
+    const size_t subgroup_size = (default_subgroup_size != 0) ? default_subgroup_size : subgroup_props.subgroupSize;
+
     const bool uma = props2.properties.deviceType == vk::PhysicalDeviceType::eIntegratedGpu;
 
     bool fp16_storage = false;