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fallback to CPU buffer if host buffer alloc fails (#4610)

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slaren 2023-12-23 16:10:51 +01:00 committed by GitHub
parent 925e5584a0
commit 708e179e85
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2 changed files with 17 additions and 10 deletions
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11
ggml-cuda.cu
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@ -6729,8 +6729,7 @@ void * ggml_cuda_host_malloc(size_t size) {
void * ptr = nullptr;
cudaError_t err = cudaMallocHost((void **) &ptr, size);
if (err != cudaSuccess) {
// The allocation error can be bypassed. A null ptr will assigned out of this function.
// This can fixed the OOM error in WSL.
// clear the error
cudaGetLastError();
fprintf(stderr, "WARNING: failed to allocate %.2f MB of pinned memory: %s\n",
size/1024.0/1024.0, cudaGetErrorString(err));
@ -9674,12 +9673,14 @@ ggml_backend_buffer_type_t ggml_backend_cuda_buffer_type(int device) {
// host buffer type
static void ggml_backend_cuda_host_buffer_free_buffer(ggml_backend_buffer_t buffer) {
CUDA_CHECK(cudaFreeHost(buffer->context));
ggml_cuda_host_free(buffer->context);
}
static ggml_backend_buffer_t ggml_backend_cuda_host_buffer_type_alloc_buffer(ggml_backend_buffer_type_t buft, size_t size) {
void * ptr;
CUDA_CHECK(cudaMallocHost(&ptr, size));
void * ptr = ggml_cuda_host_malloc(size);
if (ptr == nullptr) {
return nullptr;
}
// FIXME: this is a hack to avoid having to implement a new buffer type
ggml_backend_buffer_t buffer = ggml_backend_cpu_buffer_from_ptr(ptr, size);

16
llama.cpp
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@ -1177,21 +1177,27 @@ static std::string llama_token_to_piece(const struct llama_context * ctx, llama_
}
static ggml_backend_buffer_type_t llama_default_buffer_type(int n_gpu_layers) {
ggml_backend_buffer_type_t buft = nullptr;
#ifdef GGML_USE_METAL
if (n_gpu_layers > 0) {
return ggml_backend_metal_buffer_type();
buft = ggml_backend_metal_buffer_type();
}
#elif defined(GGML_USE_CUBLAS) && defined(LLAMA_GGML_BACKEND_CUDA_TEST)
if (n_gpu_layers > 0) {
return ggml_backend_cuda_buffer_type(0);
buft = ggml_backend_cuda_buffer_type(0);
}
#elif defined(GGML_USE_CUBLAS)
return ggml_backend_cuda_host_buffer_type();
buft = ggml_backend_cuda_host_buffer_type();
#elif defined(GGML_USE_CPU_HBM)
return ggml_backend_cpu_hbm_buffer_type();
buft = ggml_backend_cpu_hbm_buffer_type();
#endif
return ggml_backend_cpu_buffer_type();
if (buft == nullptr) {
buft = ggml_backend_cpu_buffer_type();
}
return buft;
GGML_UNUSED(n_gpu_layers);
}