Function ggml_backend_tensor_copy_async

external/ggml/src/ggml-backend.cpp:500–519

}

void ggml_backend_tensor_copy_async(ggml_backend_t backend_src, ggml_backend_t backend_dst, const struct ggml_tensor * src, struct ggml_tensor * dst) {
    GGML_ASSERT(ggml_are_same_layout(src, dst) && "cannot copy tensors with different layouts");

    if (src == dst) {
        return;
    }

    GGML_ASSERT(backend_dst);
    if (backend_dst->iface.cpy_tensor_async != NULL) {
        if (backend_dst->iface.cpy_tensor_async(backend_src, backend_dst, src, dst)) {
            return;
        }
    }

    // an async copy would normally happen after all the queued operations on both backends are completed
    // to simulate the same behavior, we need to synchronize both backends first, and do a blocking copy
    ggml_backend_synchronize(backend_src);
    ggml_backend_synchronize(backend_dst);
    ggml_backend_tensor_copy(src, dst);
}

// events