Upgrade init_tensor API to return a ggml_status

To prepare for an 'abort-free' ggml
(ggml not to abort on ooms but return a oom status),
as agreeed with Diego in the ggml repo,
upgrade the backends init_tensor APIs to return a ggml_status.

Author: WilliamTambellini

.gitignore

@@ -45,6 +45,8 @@ lcov-report/
 tags
 .build/
 build*
+release
+debug
 !build-info.cmake
 !build-info.cpp.in
 !build-info.sh

ggml/src/ggml-backend-impl.h

@@ -44,7 +44,7 @@ extern "C" {
         // base address of the buffer
         void *       (*get_base)     (ggml_backend_buffer_t buffer);
         // (optional) initialize a tensor in the buffer (eg. add tensor extras)
-        void         (*init_tensor)  (ggml_backend_buffer_t buffer, struct ggml_tensor * tensor);
+        enum ggml_status (*init_tensor)  (ggml_backend_buffer_t buffer, struct ggml_tensor * tensor);
         // tensor data access
         void         (*memset_tensor)(ggml_backend_buffer_t buffer,       struct ggml_tensor * tensor,     uint8_t value, size_t offset, size_t size);
         void         (*set_tensor)   (ggml_backend_buffer_t buffer,       struct ggml_tensor * tensor, const void * data, size_t offset, size_t size);

ggml/src/ggml-backend.cpp

@@ -126,6 +126,7 @@ void * ggml_backend_buffer_get_base(ggml_backend_buffer_t buffer) {
     return base;
 }
 
+// Check with reviewers: any cons for that method to return a ggml_status?
 void ggml_backend_buffer_init_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor) {
     // init_tensor is optional
     if (buffer->iface.init_tensor) {

ggml/src/ggml-cann/ggml-cann.cpp

@@ -796,11 +796,11 @@ static bool need_transform(ggml_type type) {
  * @param buffer The CANN buffer from which to initialize the tensor.
  * @param tensor Pointer to the tensor to be initialized.
  */
-static void ggml_backend_cann_buffer_init_tensor(
+static enum ggml_status ggml_backend_cann_buffer_init_tensor(
     ggml_backend_buffer_t buffer, ggml_tensor* tensor) {
     if (tensor->view_src != NULL && tensor->view_offs == 0) {
         GGML_ASSERT(tensor->view_src->buffer->buft == buffer->buft);
-        return;
+        return GGML_STATUS_SUCCESS;
     }
 
     // TODO: can backend doesn't support quantized yet. Just leave the code
@@ -817,6 +817,7 @@ static void ggml_backend_cann_buffer_init_tensor(
                                   memset_size, 0, memset_size));
         }
     }
+    return GGML_STATUS_SUCCESS;
 }
 
 // TODO: need handle tensor which has paddings.

ggml/src/ggml-cpu/amx/amx.cpp

@@ -50,10 +50,11 @@ static void * ggml_backend_amx_buffer_get_base(ggml_backend_buffer_t buffer) {
     return (void *) (buffer->context);
 }
 
-static void ggml_backend_amx_buffer_init_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor) {
+static enum ggml_status ggml_backend_amx_buffer_init_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor) {
     tensor->extra = (void *) ggml::cpu::amx::get_tensor_traits(buffer, tensor);
 
     GGML_UNUSED(buffer);
+    return GGML_STATUS_SUCCESS;
 }
 
 static void ggml_backend_amx_buffer_memset_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor,

ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp

@@ -4135,10 +4135,11 @@ static const ggml::cpu::tensor_traits * ggml_aarch64_get_optimal_repack_type(con
     return nullptr;
 }
 
-static void ggml_backend_cpu_aarch64_buffer_init_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor) {
+static enum ggml_status ggml_backend_cpu_aarch64_buffer_init_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor) {
     tensor->extra = (void *) const_cast<ggml::cpu::tensor_traits *>(ggml_aarch64_get_optimal_repack_type(tensor));
 
     GGML_UNUSED(buffer);
+    return GGML_STATUS_SUCCESS;
 }
 
 static void ggml_backend_cpu_aarch64_buffer_set_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor,

ggml/src/ggml-cuda/CMakeLists.txt

@@ -1,9 +1,13 @@
 cmake_minimum_required(VERSION 3.18)  # for CMAKE_CUDA_ARCHITECTURES
 
+unset(${CMAKE_CUDA_HOST_COMPILER} CACHE)
+message(DEBUG "CUDAHOSTCXX= $ENV{CUDAHOSTCXX}")
+message(DEBUG "CMAKE_CUDA_HOST_COMPILER= ${CMAKE_CUDA_HOST_COMPILER}") # reminder: must be a C++ compiler, not just C
+
 find_package(CUDAToolkit)
 
 if (CUDAToolkit_FOUND)
-    message(STATUS "CUDA Toolkit found")
+    message(STATUS "CUDA Toolkit found: ${CUDAToolkit_VERSION}")
 
     if (NOT DEFINED CMAKE_CUDA_ARCHITECTURES)
         # native == GPUs available at build time
@@ -24,6 +28,9 @@ if (CUDAToolkit_FOUND)
 
     enable_language(CUDA)
 
+    message(DEBUG "CMAKE_CUDA_COMPILER=${CMAKE_CUDA_COMPILER}")
+    message(DEBUG "CMAKE_CUDA_HOST_COMPILER= ${CMAKE_CUDA_HOST_COMPILER}")
+
     file(GLOB   GGML_HEADERS_CUDA "*.cuh")
     list(APPEND GGML_HEADERS_CUDA "../../include/ggml-cuda.h")
 

ggml/src/ggml-cuda/ggml-cuda.cu

@@ -534,12 +534,12 @@ static void * ggml_backend_cuda_buffer_get_base(ggml_backend_buffer_t buffer) {
     return ctx->dev_ptr;
 }
 
-static void ggml_backend_cuda_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
+static enum ggml_status ggml_backend_cuda_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
     ggml_backend_cuda_buffer_context * ctx = (ggml_backend_cuda_buffer_context *)buffer->context;
 
     if (tensor->view_src != NULL) {
         assert(tensor->view_src->buffer->buft == buffer->buft);
-        return;
+        return GGML_STATUS_SUCCESS; // check with reviewers
     }
 
     if (ggml_is_quantized(tensor->type) && tensor->view_src == nullptr && ggml_backend_buffer_get_usage(buffer) != GGML_BACKEND_BUFFER_USAGE_COMPUTE) {
@@ -552,6 +552,7 @@ static void ggml_backend_cuda_buffer_init_tensor(ggml_backend_buffer_t buffer, g
             CUDA_CHECK(cudaMemset((char *)tensor->data + original_size, 0, padded_size - original_size));
         }
     }
+    return GGML_STATUS_SUCCESS;
 }
 
 static void ggml_backend_cuda_buffer_memset_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor, uint8_t value, size_t offset, size_t size) {
@@ -786,7 +787,7 @@ static void * ggml_backend_cuda_split_buffer_get_base(ggml_backend_buffer_t buff
     GGML_UNUSED(buffer);
 }
 
-static void ggml_backend_cuda_split_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
+static enum ggml_status ggml_backend_cuda_split_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
     GGML_ASSERT(tensor->view_src == nullptr); // views of split tensors are not supported
 
     ggml_backend_cuda_split_buffer_context * ctx = (ggml_backend_cuda_split_buffer_context *)buffer->context;
@@ -832,6 +833,7 @@ static void ggml_backend_cuda_split_buffer_init_tensor(ggml_backend_buffer_t buf
         }
     }
     tensor->extra = extra;
+    return GGML_STATUS_SUCCESS;
 }
 
 static void ggml_backend_cuda_split_buffer_set_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor, const void * data, size_t offset, size_t size) {

ggml/src/ggml-opencl/ggml-opencl.cpp

@@ -1211,7 +1211,7 @@ static void * ggml_backend_opencl_buffer_get_base(ggml_backend_buffer_t buffer)
     GGML_UNUSED(buffer);
 }
 
-static void ggml_backend_opencl_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
+static enum ggml_status ggml_backend_opencl_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
     ggml_backend_opencl_buffer_context * ctx = (ggml_backend_opencl_buffer_context *) buffer->context;
 
     ggml_cl2_init(buffer->buft->device);
@@ -1251,6 +1251,7 @@ static void ggml_backend_opencl_buffer_init_tensor(ggml_backend_buffer_t buffer,
             tensor->extra = extra;
         }
     }
+    return GGML_STATUS_SUCCESS;
 }
 
 // The optimized gemm and gemv kernels are used for large matrices without batch.

ggml/src/ggml-rpc/ggml-rpc.cpp

@@ -464,7 +464,7 @@ static rpc_tensor serialize_tensor(const ggml_tensor * tensor) {
     return result;
 }
 
-static void ggml_backend_rpc_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
+static enum ggml_status ggml_backend_rpc_buffer_init_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor) {
     ggml_backend_rpc_buffer_context * ctx = (ggml_backend_rpc_buffer_context *)buffer->context;
 
     // CUDA backend on the server pads everything to 512 due to CUDA limitations.
@@ -478,6 +478,7 @@ static void ggml_backend_rpc_buffer_init_tensor(ggml_backend_buffer_t buffer, gg
         bool status = send_rpc_cmd(ctx->sock, RPC_CMD_INIT_TENSOR, &request, sizeof(request), nullptr, 0);
         GGML_ASSERT(status);
     }
+    return GGML_STATUS_SUCCESS;
 }
 
 static void ggml_backend_rpc_buffer_set_tensor(ggml_backend_buffer_t buffer, ggml_tensor * tensor, const void * data, size_t offset, size_t size) {