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Enhanced physical device selection to use device type and available memory in relation to issue #35397

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This commit is contained in:
Christopher Joseph Dean Schaefer 2020-02-26 20:34:02 -05:00
parent f64342fca9
commit 4f3006e5ac
1 changed files with 33 additions and 2 deletions
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35
drivers/vulkan/vulkan_context.cpp
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@ -359,8 +359,39 @@ Error VulkanContext::_create_physical_device() {
free(physical_devices);
ERR_FAIL_V(ERR_CANT_CREATE);
}
/* for now, just grab the first physical device */
gpu = physical_devices[0];
/*Find the first discrete GPU with the most VRAM.*/
{
print_line("Selecting primary GPU.");
VkPhysicalDeviceProperties device_properties;
VkPhysicalDeviceMemoryProperties memory_properties;
gpu = physical_devices[0];
uint32_t largest_vram_size = 0;
VkPhysicalDeviceType gpu_type = VK_PHYSICAL_DEVICE_TYPE_OTHER;
for (uint32_t i = 0; i < gpu_count; i++) {
vkGetPhysicalDeviceProperties(physical_devices[i], &device_properties);
/*Skip virtual and CPU devices for now.*/
if (device_properties.deviceType > VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU) {
continue;
}
vkGetPhysicalDeviceMemoryProperties(physical_devices[i], &memory_properties);
/*Total all heaps in case of 3GB+1GB configurations and similar.*/
uint32_t memory_size = 0;
for (uint32_t j = 0; j < memory_properties.memoryHeapCount; j++) {
memory_size += memory_properties.memoryHeaps[j].size;
}
if ((device_properties.deviceType >= gpu_type) || (device_properties.deviceType == gpu_type && memory_size > largest_vram_size)) {
gpu = physical_devices[i];
gpu_type = device_properties.deviceType;
largest_vram_size = memory_size;
print_line(device_properties.deviceName);
}
}
}
free(physical_devices);
/* Look for device extensions */