Method activate

XM/include/Utils/memory.h:166–170

            return;
        }
        inline void activate() {
            CHECK_CUDA( cudaSetDevice(this->gpu_id) );
            CHECK_CUSPARSE( cusparseCreate(&this->cusparse_handle) );
            return;
        }
        inline void activate(const DeviceStream& device_stream) {
            assert(device_stream.gpu_id == this->gpu_id);
            CHECK_CUDA( cudaSetDevice(this->gpu_id) );