cuda : improve cuda pool efficiency using virtual memory

CMakeLists.txt

@@ -302,6 +302,8 @@ if (LLAMA_CUBLAS)
             set(LLAMA_EXTRA_LIBS ${LLAMA_EXTRA_LIBS} CUDA::cudart CUDA::cublas CUDA::cublasLt)
         endif()
 
+        set(LLAMA_EXTRA_LIBS ${LLAMA_EXTRA_LIBS} CUDA::cuda_driver)
+
     if (NOT DEFINED CMAKE_CUDA_ARCHITECTURES)
         # 52 == lowest CUDA 12 standard
         # 60 == f16 CUDA intrinsics

Makefile

@@ -367,17 +367,15 @@ endif # LLAMA_BLIS
 
 ifdef LLAMA_CUBLAS
 	MK_CPPFLAGS  += -DGGML_USE_CUBLAS -I/usr/local/cuda/include -I/opt/cuda/include -I$(CUDA_PATH)/targets/x86_64-linux/include -I/usr/local/cuda/targets/aarch64-linux/include
-	MK_LDFLAGS   += -lcublas -lculibos -lcudart -lcublasLt -lpthread -ldl -lrt -L/usr/local/cuda/lib64 -L/opt/cuda/lib64 -L$(CUDA_PATH)/targets/x86_64-linux/lib -L/usr/local/cuda/targets/aarch64-linux/lib
+	MK_LDFLAGS   += -lcuda -lcublas -lculibos -lcudart -lcublasLt -lpthread -ldl -lrt -L/usr/local/cuda/lib64 -L/opt/cuda/lib64 -L$(CUDA_PATH)/targets/x86_64-linux/lib -L/usr/local/cuda/targets/aarch64-linux/lib -L/usr/lib/wsl/lib
 	OBJS         += ggml-cuda.o
 	MK_NVCCFLAGS  = -use_fast_math
 ifndef JETSON_EOL_MODULE_DETECT
 	MK_NVCCFLAGS += --forward-unknown-to-host-compiler
 endif # JETSON_EOL_MODULE_DETECT
-
 ifdef LLAMA_DEBUG
 	MK_NVCCFLAGS += -lineinfo
-endif
-
+endif # LLAMA_DEBUG
 ifdef LLAMA_CUDA_NVCC
 	NVCC = $(LLAMA_CUDA_NVCC)
 else

ggml-backend.c

@@ -297,7 +297,7 @@ static void ggml_backend_registry_init(void) {
 void ggml_backend_register(const char * name, ggml_backend_init_fn init_fn, ggml_backend_buffer_type_t default_buffer_type, void * user_data) {
     GGML_ASSERT(ggml_backend_registry_count < GGML_MAX_BACKENDS_REG);
 
-    int id = ggml_backend_registry_count;
+    size_t id = ggml_backend_registry_count;
 
     ggml_backend_registry[id] = (struct ggml_backend_reg) {
         /* .name                = */ {0},
@@ -330,6 +330,8 @@ size_t ggml_backend_reg_find_by_name(const char * name) {
             return i;
         }
     }
+
+    // not found
     return SIZE_MAX;
 }
 
@@ -340,15 +342,15 @@ ggml_backend_t ggml_backend_reg_init_backend_from_str(const char * backend_str)
     const char * params = strchr(backend_str, ':');
     char backend_name[128];
     if (params == NULL) {
-        strcpy(backend_name, backend_str);
+        snprintf(backend_name, sizeof(backend_name), "%s", backend_str);
         params = "";
     } else {
-        strncpy(backend_name, backend_str, params - backend_str);
-        backend_name[params - backend_str] = '\0';
+        snprintf(backend_name, sizeof(backend_name), "%.*s", (int)(params - backend_str), backend_str);
         params++;
     }
 
     size_t backend_i = ggml_backend_reg_find_by_name(backend_name);
+
     if (backend_i == SIZE_MAX) {
         fprintf(stderr, "%s: backend %s not found\n", __func__, backend_name);
         return NULL;
@@ -396,18 +398,12 @@ static void ggml_backend_cpu_buffer_free_buffer(ggml_backend_buffer_t buffer) {
 }
 
 static void ggml_backend_cpu_buffer_set_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor, const void * data, size_t offset, size_t size) {
-    GGML_ASSERT(offset + size <= ggml_nbytes(tensor) && "tensor write out of bounds");
-    GGML_ASSERT(tensor->data != NULL && "tensor not allocated");
-
     memcpy((char *)tensor->data + offset, data, size);
 
     GGML_UNUSED(buffer);
 }
 
 static void ggml_backend_cpu_buffer_get_tensor(ggml_backend_buffer_t buffer, const struct ggml_tensor * tensor, void * data, size_t offset, size_t size) {
-    GGML_ASSERT(offset + size <= ggml_nbytes(tensor) && "tensor read out of bounds");
-    GGML_ASSERT(tensor->data != NULL && "tensor not allocated");
-
     memcpy(data, (const char *)tensor->data + offset, size);
 
     GGML_UNUSED(buffer);