refactor: call CPU backend functions dynamically

src/convert.cpp

@@ -8,7 +8,7 @@
 #include "model_io/safetensors_io.h"
 #include "util.h"
 
-#include "ggml-cpu.h"
+#include "ggml_extend_backend.h"
 
 static ggml_type get_export_tensor_type(ModelLoader& model_loader,
                                         const TensorStorage& tensor_storage,
@@ -103,7 +103,7 @@ bool convert(const char* input_path,
     bool output_is_safetensors = ends_with(output_path, ".safetensors");
     TensorTypeRules type_rules = parse_tensor_type_rules(tensor_type_rules);
 
-    auto backend    = ggml_backend_cpu_init();
+    auto backend    = sd_backend_cpu_init();
     size_t mem_size = 1 * 1024 * 1024;  // for padding
     mem_size += model_loader.get_tensor_storage_map().size() * ggml_tensor_overhead();
     mem_size += model_loader.get_params_mem_size(backend, type);

src/flux.hpp

@@ -1567,7 +1567,7 @@ namespace Flux {
 
         static void load_from_file_and_test(const std::string& file_path) {
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
-            ggml_backend_t backend    = ggml_backend_cpu_init();
+            ggml_backend_t backend    = sd_backend_cpu_init();
             ggml_type model_data_type = GGML_TYPE_COUNT;
 
             ModelLoader model_loader;

src/ggml_extend.hpp

@@ -1442,7 +1442,7 @@ __STATIC_INLINE__ ggml_tensor* ggml_ext_group_norm(ggml_context* ctx,
 
 __STATIC_INLINE__ void ggml_ext_backend_tensor_get_and_sync(ggml_backend_t backend, const ggml_tensor* tensor, void* data, size_t offset, size_t size) {
     if ((sd_backend_is(backend, "ROCm") || sd_backend_is(backend, "CUDA") || sd_backend_is(backend, "SYCL")) &&
-        !ggml_backend_is_cpu(backend)) {
+        !sd_backend_is_cpu(backend)) {
         ggml_backend_tensor_get_async(backend, tensor, data, offset, size);
         ggml_backend_synchronize(backend);
         return;
@@ -1899,7 +1899,7 @@ struct GGMLRunner {
         LOG_DEBUG("%s compute buffer size: %.2f MB(%s)",
                   get_desc().c_str(),
                   compute_buffer_size / 1024.0 / 1024.0,
-                  ggml_backend_is_cpu(runtime_backend) ? "RAM" : "VRAM");
+                  sd_backend_is_cpu(runtime_backend) ? "RAM" : "VRAM");
         return true;
     }
 
@@ -1986,7 +1986,7 @@ struct GGMLRunner {
         LOG_DEBUG("%s cache backend buffer size = % 6.2f MB(%s) (%i tensors)",
                   get_desc().c_str(),
                   cache_buffer_size / (1024.f * 1024.f),
-                  ggml_backend_is_cpu(runtime_backend) ? "RAM" : "VRAM",
+                  sd_backend_is_cpu(runtime_backend) ? "RAM" : "VRAM",
                   num_tensors);
         if (old_cache_buffer != nullptr) {
             ggml_backend_buffer_free(old_cache_buffer);
@@ -2293,13 +2293,13 @@ struct GGMLRunner {
                max_graph_vram_bytes > 0 &&
                plan.segments.size() > 1 &&
                params_backend != runtime_backend &&
-               !ggml_backend_is_cpu(runtime_backend);
+               !sd_backend_is_cpu(runtime_backend);
     }
 
     bool can_attempt_graph_cut_segmented_compute() const {
         return max_graph_vram_bytes > 0 &&
                params_backend != runtime_backend &&
-               !ggml_backend_is_cpu(runtime_backend);
+               !sd_backend_is_cpu(runtime_backend);
     }
 
     bool resolve_graph_cut_plan(ggml_cgraph* gf,
@@ -2436,8 +2436,8 @@ struct GGMLRunner {
         int64_t t_copy_begin = ggml_time_ms();
         copy_data_to_backend_tensor(gf, !preserve_backend_tensor_data_map);
         int64_t t_copy_end = ggml_time_ms();
-        if (ggml_backend_is_cpu(runtime_backend)) {
-            ggml_backend_cpu_set_n_threads(runtime_backend, n_threads);
+        if (sd_backend_is_cpu(runtime_backend)) {
+            sd_backend_cpu_set_n_threads(runtime_backend, n_threads);
         }
 
         int64_t t_compute_begin = ggml_time_ms();
@@ -2679,7 +2679,7 @@ struct GGMLRunner {
         LOG_DEBUG("%s params backend buffer size = % 6.2f MB(%s) (%i tensors)",
                   get_desc().c_str(),
                   params_buffer_size / (1024.f * 1024.f),
-                  ggml_backend_is_cpu(params_backend) ? "RAM" : "VRAM",
+                  sd_backend_is_cpu(params_backend) ? "RAM" : "VRAM",
                   num_tensors);
         return true;
     }
@@ -2746,7 +2746,7 @@ struct GGMLRunner {
             return nullptr;
         }
         // it's performing a compute, check if backend isn't cpu
-        if (!ggml_backend_is_cpu(runtime_backend) && (tensor->buffer == nullptr || ggml_backend_buffer_is_host(tensor->buffer))) {
+        if (!sd_backend_is_cpu(runtime_backend) && (tensor->buffer == nullptr || ggml_backend_buffer_is_host(tensor->buffer))) {
             // pass input tensors to gpu memory
             auto backend_tensor = ggml_dup_tensor(compute_ctx, tensor);
 

src/ggml_extend_backend.cpp

@@ -8,6 +8,7 @@
 #include <stdexcept>
 #include <vector>
 
+#include "stable-diffusion.h"
 #include "util.h"
 
 static std::string trim_copy(const std::string& value) {
@@ -300,6 +301,61 @@ static ggml_backend_t init_named_backend(const std::string& name) {
     return ggml_backend_init_by_name(resolved.c_str(), nullptr);
 }
 
+bool sd_backend_is_cpu(ggml_backend_t backend) {
+    if (backend == nullptr) {
+        return false;
+    }
+    auto dev = ggml_backend_get_device(backend);
+    return dev != nullptr && ggml_backend_dev_type(dev) == GGML_BACKEND_DEVICE_TYPE_CPU;
+}
+
+ggml_backend_t sd_backend_cpu_init() {
+    ggml_backend_load_all_once();
+    return ggml_backend_init_by_type(GGML_BACKEND_DEVICE_TYPE_CPU, nullptr);
+}
+
+bool sd_backend_cpu_set_n_threads(ggml_backend_t backend, int n_threads) {
+    if (backend == nullptr) {
+        return false;
+    }
+    auto dev = ggml_backend_get_device(backend);
+    if (dev != nullptr && ggml_backend_dev_type(dev) == GGML_BACKEND_DEVICE_TYPE_CPU) {
+        auto reg                           = ggml_backend_dev_backend_reg(dev);
+        auto ggml_backend_set_n_threads_fn = (ggml_backend_set_n_threads_t)ggml_backend_reg_get_proc_address(reg, "ggml_backend_set_n_threads");
+        if (ggml_backend_set_n_threads_fn != nullptr) {
+            ggml_backend_set_n_threads_fn(backend, n_threads);
+            return true;
+        }
+    }
+    return false;
+}
+
+const char* sd_get_system_info() {
+    static std::string cache_info = []() -> std::string {
+        ggml_backend_load_all_once();
+        std::stringstream ss;
+        ss << "System Info: \n";
+        auto dev = ggml_backend_dev_by_type(GGML_BACKEND_DEVICE_TYPE_CPU);
+        if (dev != nullptr) {
+            auto reg                          = ggml_backend_dev_backend_reg(dev);
+            auto ggml_backend_get_features_fn = (ggml_backend_get_features_t)ggml_backend_reg_get_proc_address(reg, "ggml_backend_get_features");
+            if (ggml_backend_get_features_fn != nullptr) {
+                ggml_backend_feature* feat = ggml_backend_get_features_fn(reg);
+                while (feat->name && feat->value) {
+                    ss << "   " << feat->name << " = " << feat->value << " | ";
+                    feat++;
+                }
+            } else {
+                LOG_WARN("unable to get CPU features");
+            }
+        } else {
+            LOG_WARN("unable to get CPU features");
+        }
+        return ss.str();
+    }();
+    return cache_info.c_str();
+}
+
 static ggml_backend_t sd_get_default_backend() {
     ggml_backend_load_all_once();
     static std::once_flag once;
@@ -349,10 +405,10 @@ static ggml_backend_t sd_get_default_backend() {
 
     if (!backend) {
         LOG_WARN("loading CPU backend");
-        backend = ggml_backend_cpu_init();
+        backend = sd_backend_cpu_init();
     }
 
-    if (ggml_backend_is_cpu(backend)) {
+    if (sd_backend_is_cpu(backend)) {
         LOG_DEBUG("Using CPU backend");
     }
 
@@ -452,19 +508,19 @@ ggml_backend_t SDBackendManager::params_backend(SDBackendModule module) {
 }
 
 bool SDBackendManager::runtime_backend_is_cpu(SDBackendModule module) {
-    return ggml_backend_is_cpu(runtime_backend(module));
+    return sd_backend_is_cpu(runtime_backend(module));
 }
 
 bool SDBackendManager::params_backend_is_cpu(SDBackendModule module) {
-    return ggml_backend_is_cpu(params_backend(module));
+    return sd_backend_is_cpu(params_backend(module));
 }
 
 bool SDBackendManager::runtime_backend_supports_host_buffer(SDBackendModule module) {
     ggml_backend_t backend = runtime_backend(module);
     if (backend == nullptr) {
         return false;
     }
-    if (ggml_backend_is_cpu(backend)) {
+    if (sd_backend_is_cpu(backend)) {
         return true;
     }
     ggml_backend_dev_t dev = ggml_backend_get_device(backend);

src/ggml_extend_backend.h

@@ -8,7 +8,6 @@
 #include <unordered_map>
 
 #include "ggml-backend.h"
-#include "ggml-cpu.h"
 #include "ggml.h"
 
 enum class SDBackendModule {
@@ -72,6 +71,9 @@ class SDBackendManager {
 };
 
 bool sd_backend_is(ggml_backend_t backend, const std::string& name);
+bool sd_backend_is_cpu(ggml_backend_t backend);
+ggml_backend_t sd_backend_cpu_init();
+bool sd_backend_cpu_set_n_threads(ggml_backend_t backend_cpu, int n_threads);
 const char* sd_backend_module_name(SDBackendModule module);
 void ggml_ext_im_set_f32_1d(const struct ggml_tensor* tensor, int i, float value);
 #endif

src/llm.hpp

@@ -2041,7 +2041,7 @@ namespace LLM {
         static void load_from_file_and_test(const std::string& file_path) {
             // cpu f16: pass
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
-            ggml_backend_t backend    = ggml_backend_cpu_init();
+            ggml_backend_t backend    = sd_backend_cpu_init();
             ggml_type model_data_type = GGML_TYPE_COUNT;
 
             ModelLoader model_loader;

src/lora.hpp

@@ -772,7 +772,7 @@ struct LoraModel : public GGMLRunner {
             }
 
             ggml_tensor* original_tensor = model_tensor;
-            if (!ggml_backend_is_cpu(runtime_backend) && ggml_backend_buffer_is_host(original_tensor->buffer)) {
+            if (!sd_backend_is_cpu(runtime_backend) && ggml_backend_buffer_is_host(original_tensor->buffer)) {
                 model_tensor = ggml_dup_tensor(compute_ctx, model_tensor);
                 set_backend_tensor_data(model_tensor, original_tensor->data);
             }
@@ -786,7 +786,7 @@ struct LoraModel : public GGMLRunner {
                 final_tensor = ggml_add_inplace(compute_ctx, model_tensor, diff);
             }
             ggml_build_forward_expand(gf, final_tensor);
-            if (!ggml_backend_is_cpu(runtime_backend) && ggml_backend_buffer_is_host(original_tensor->buffer)) {
+            if (!sd_backend_is_cpu(runtime_backend) && ggml_backend_buffer_is_host(original_tensor->buffer)) {
                 original_tensor_to_final_tensor[original_tensor] = final_tensor;
             }
         }

src/ltx_audio_vae.h

@@ -1052,7 +1052,7 @@ namespace LTXV {
         static void load_from_file_and_test(const std::string& model_path,
                                             const std::string& input_path,
                                             const std::string& prefix = "") {
-            ggml_backend_t backend = ggml_backend_cpu_init();
+            ggml_backend_t backend = sd_backend_cpu_init();
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
             LOG_INFO("loading ltx audio vae from '%s'", model_path.c_str());
 

src/ltx_vae.hpp

@@ -1517,7 +1517,7 @@ struct LTXVideoVAE : public VAE {
     static void load_from_file_and_test(const std::string& model_path,
                                         const std::string& input_path) {
         // ggml_backend_t backend = ggml_backend_cuda_init(0);
-        ggml_backend_t backend = ggml_backend_cpu_init();
+        ggml_backend_t backend = sd_backend_cpu_init();
         LOG_INFO("loading ltx vae from '%s'", model_path.c_str());
 
         ModelLoader model_loader;

src/ltxv.hpp

@@ -1995,7 +1995,7 @@ namespace LTXV {
                                             const std::string& audio_x_path         = "",
                                             const std::string& audio_timesteps_path = "") {
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
-            ggml_backend_t backend = ggml_backend_cpu_init();
+            ggml_backend_t backend = sd_backend_cpu_init();
             LOG_INFO("loading ltxav from '%s'", model_path.c_str());
 
             ModelLoader model_loader;

src/mmdit.hpp

@@ -947,7 +947,7 @@ struct MMDiTRunner : public DiffusionModelRunner {
 
     static void load_from_file_and_test(const std::string& file_path) {
         // ggml_backend_t backend    = ggml_backend_cuda_init(0);
-        ggml_backend_t backend             = ggml_backend_cpu_init();
+        ggml_backend_t backend             = sd_backend_cpu_init();
         ggml_type model_data_type          = GGML_TYPE_F16;
         std::shared_ptr<MMDiTRunner> mmdit = std::make_shared<MMDiTRunner>(backend, backend);
         {

src/qwen_image.hpp

@@ -683,7 +683,7 @@ namespace Qwen {
             // cuda q8: pass
             // cuda q8 fa: pass
             // ggml_backend_t backend    = ggml_backend_cuda_init(0);
-            ggml_backend_t backend    = ggml_backend_cpu_init();
+            ggml_backend_t backend    = sd_backend_cpu_init();
             ggml_type model_data_type = GGML_TYPE_Q8_0;
 
             ModelLoader model_loader;

src/stable-diffusion.cpp

@@ -1095,7 +1095,7 @@ class StableDiffusionGGML {
                 if (module_backend == nullptr) {
                     return false;
                 }
-                if (ggml_backend_is_cpu(module_backend)) {
+                if (sd_backend_is_cpu(module_backend)) {
                     total_params_ram_size += size;
                 } else {
                     total_params_vram_size += size;
@@ -1110,7 +1110,7 @@ class StableDiffusionGGML {
                 if (module_backend == nullptr) {
                     return "N/A";
                 }
-                return ggml_backend_is_cpu(module_backend) ? "RAM" : "VRAM";
+                return sd_backend_is_cpu(module_backend) ? "RAM" : "VRAM";
             };
 
             if (!add_params_memory(clip_params_mem_size, SDBackendModule::TE) ||

src/t5.hpp

@@ -563,7 +563,7 @@ struct T5Embedder {
         // cuda f32: pass
         // cuda q8_0: pass
         // ggml_backend_t backend = ggml_backend_cuda_init(0);
-        ggml_backend_t backend    = ggml_backend_cpu_init();
+        ggml_backend_t backend    = sd_backend_cpu_init();
         ggml_type model_data_type = GGML_TYPE_F16;
 
         ModelLoader model_loader;

src/util.cpp

@@ -25,9 +25,7 @@
 #include <unistd.h>
 #endif
 
-#include "ggml-backend.h"
 #include "ggml.h"
-#include "ggml_extend_backend.h"
 #include "stable-diffusion.h"
 
 bool ends_with(const std::string& str, const std::string& ending) {
@@ -974,30 +972,3 @@ std::vector<std::pair<std::string, float>> split_quotation_attention(
     }
     return result;
 }
-
-// namespace is needed to avoid conflicts with ggml_backend_extend.hpp
-namespace ggml_cpu {
-#include "ggml-cpu.h"
-}
-
-const char* sd_get_system_info() {
-    using namespace ggml_cpu;
-    static char buffer[1024];
-    std::stringstream ss;
-    ss << "System Info: \n";
-    ss << "    SSE3 = " << ggml_cpu_has_sse3() << " | ";
-    ss << "    AVX = " << ggml_cpu_has_avx() << " | ";
-    ss << "    AVX2 = " << ggml_cpu_has_avx2() << " | ";
-    ss << "    AVX512 = " << ggml_cpu_has_avx512() << " | ";
-    ss << "    AVX512_VBMI = " << ggml_cpu_has_avx512_vbmi() << " | ";
-    ss << "    AVX512_VNNI = " << ggml_cpu_has_avx512_vnni() << " | ";
-    ss << "    FMA = " << ggml_cpu_has_fma() << " | ";
-    ss << "    NEON = " << ggml_cpu_has_neon() << " | ";
-    ss << "    ARM_FMA = " << ggml_cpu_has_arm_fma() << " | ";
-    ss << "    F16C = " << ggml_cpu_has_f16c() << " | ";
-    ss << "    FP16_VA = " << ggml_cpu_has_fp16_va() << " | ";
-    ss << "    WASM_SIMD = " << ggml_cpu_has_wasm_simd() << " | ";
-    ss << "    VSX = " << ggml_cpu_has_vsx() << " | ";
-    snprintf(buffer, sizeof(buffer), "%s", ss.str().c_str());
-    return buffer;
-}

src/wan.hpp

@@ -1328,7 +1328,7 @@ namespace WAN {
 
         static void load_from_file_and_test(const std::string& file_path) {
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
-            ggml_backend_t backend            = ggml_backend_cpu_init();
+            ggml_backend_t backend            = sd_backend_cpu_init();
             ggml_type model_data_type         = GGML_TYPE_F16;
             std::shared_ptr<WanVAERunner> vae = std::make_shared<WanVAERunner>(backend, backend, String2TensorStorage{}, "", false, VERSION_WAN2_2_TI2V);
             {
@@ -2348,7 +2348,7 @@ namespace WAN {
 
         static void load_from_file_and_test(const std::string& file_path) {
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
-            ggml_backend_t backend    = ggml_backend_cpu_init();
+            ggml_backend_t backend    = sd_backend_cpu_init();
             ggml_type model_data_type = GGML_TYPE_F16;
             LOG_INFO("loading from '%s'", file_path.c_str());
 

src/z_image.hpp

@@ -615,7 +615,7 @@ namespace ZImage {
             // cuda q8: pass
             // cuda q8 fa: pass
             // ggml_backend_t backend = ggml_backend_cuda_init(0);
-            ggml_backend_t backend    = ggml_backend_cpu_init();
+            ggml_backend_t backend    = sd_backend_cpu_init();
             ggml_type model_data_type = GGML_TYPE_Q8_0;
 
             ModelLoader model_loader;