DarthAffe/stable-diffusion.cpp
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feat: select vulkan device with env variable (#629)

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stduhpf 2025-12-21 08:35:38 +01:00 committed by GitHub
parent 23fce0bd84
commit 60abda56e0
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1 changed files with 21 additions and 1 deletions
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stable-diffusion.cpp
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@ -165,7 +165,27 @@ public:
#endif
#ifdef SD_USE_VULKAN
LOG_DEBUG("Using Vulkan backend");
for (int device = 0; device < ggml_backend_vk_get_device_count(); ++device) {
size_t device = 0;
const int device_count = ggml_backend_vk_get_device_count();
if (device_count) {
const char* SD_VK_DEVICE = getenv("SD_VK_DEVICE");
if (SD_VK_DEVICE != nullptr) {
std::string sd_vk_device_str = SD_VK_DEVICE;
try {
device = std::stoull(sd_vk_device_str);
} catch (const std::invalid_argument&) {
LOG_WARN("SD_VK_DEVICE environment variable is not a valid integer (%s). Falling back to device 0.", SD_VK_DEVICE);
device = 0;
} catch (const std::out_of_range&) {
LOG_WARN("SD_VK_DEVICE environment variable value is out of range for `unsigned long long` type (%s). Falling back to device 0.", SD_VK_DEVICE);
device = 0;
}
if (device >= device_count) {
LOG_WARN("Cannot find targeted vulkan device (%llu). Falling back to device 0.", device);
device = 0;
}
}
LOG_INFO("Vulkan: Using device %llu", device);
backend = ggml_backend_vk_init(device);
}
if (!backend) {