Vulkan: Add VK_AMD_shader_core_properties2 support to read Compute Unit count for split_k logic

Author: 0cc4m

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

@@ -1701,13 +1701,16 @@ static vk_device ggml_vk_get_device(size_t idx) {
 
         bool maintenance4_support = false;
         bool sm_builtins = false;
+        bool amd_shader_core_properties2 = false;
 
         // Check if maintenance4 is supported
         for (const auto& properties : ext_props) {
             if (strcmp("VK_KHR_maintenance4", properties.extensionName) == 0) {
                 maintenance4_support = true;
             } else if (strcmp("VK_NV_shader_sm_builtins", properties.extensionName) == 0) {
                 sm_builtins = true;
+            } else if (strcmp("VK_AMD_shader_core_properties2", properties.extensionName) == 0) {
+                amd_shader_core_properties2 = true;
             }
         }
 
@@ -1716,6 +1719,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
         vk::PhysicalDeviceMaintenance4Properties props4;
         vk::PhysicalDeviceSubgroupProperties subgroup_props;
         vk::PhysicalDeviceShaderSMBuiltinsPropertiesNV sm_props;
+        vk::PhysicalDeviceShaderCoreProperties2AMD amd_shader_core_properties2_props;
         props2.pNext = &props3;
         props3.pNext = &subgroup_props;
 
@@ -1729,6 +1733,10 @@ static vk_device ggml_vk_get_device(size_t idx) {
             last_struct->pNext = (VkBaseOutStructure *)&sm_props;
             last_struct = (VkBaseOutStructure *)&sm_props;
         }
+        if (amd_shader_core_properties2) {
+            last_struct->pNext = (VkBaseOutStructure *)&amd_shader_core_properties2_props;
+            last_struct = (VkBaseOutStructure *)&amd_shader_core_properties2_props;
+        }
 
         device->physical_device.getProperties2(&props2);
         device->properties = props2.properties;
@@ -1748,6 +1756,8 @@ static vk_device ggml_vk_get_device(size_t idx) {
         device->uma = device->properties.deviceType == vk::PhysicalDeviceType::eIntegratedGpu;
         if (sm_builtins) {
             device->shader_core_count = sm_props.shaderSMCount;
+        } else if (amd_shader_core_properties2) {
+            device->shader_core_count = amd_shader_core_properties2_props.activeComputeUnitCount;
         } else {
             device->shader_core_count = 0;
         }
@@ -1822,7 +1832,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
         vk11_features.pNext = &vk12_features;
 
         // Pointer to the last chain element
-        VkBaseOutStructure * last_struct = (VkBaseOutStructure *)&vk12_features;
+        last_struct = (VkBaseOutStructure *)&vk12_features;
 
         VkPhysicalDevicePipelineRobustnessFeaturesEXT pl_robustness_features;
         pl_robustness_features.pNext = nullptr;
@@ -1952,6 +1962,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
         // Shaders
         // Disable matmul tile sizes early if performance low or not supported
         switch (device->vendor_id) {
+#ifndef GGML_VULKAN_RUN_TESTS
         case VK_VENDOR_ID_AMD:
         case VK_VENDOR_ID_INTEL:
             device->mul_mat_l = false;
@@ -1969,6 +1980,7 @@ static vk_device ggml_vk_get_device(size_t idx) {
             device->mul_mat_id_m = true;
             device->mul_mat_id_s = false;
             break;
+#endif
         default:
             device->mul_mat_l = true;
             device->mul_mat_m = true;