portDNN Configuration Options

portDNN's CMake provides a number of configuration options to control which parts of the code will be built, tested and benchmarked. They are described here.

Build options

Option	Type	Default	Description
CMAKE_BUILD_TYPE	STRING	Release	Release, RelWithDebInfo etc. Controls compiler flags.
SNN_FASTBUILD	BOOL	OFF	Disables default-set CMAKE_BUILD_TYPE when ON
SNN_BUILD_TESTS	BOOL	ON	Enables the portDNN test suite
SNN_BUILD_SAMPLES	BOOL	ON	Builds portDNN's sample code
SNN_BUILD_BENCHMARKS	BOOL	ON	Builds portDNN's benchmarks
SNN_BUILD_EXTENDED_BENCHMARKS	BOOL	OFF	OFF disables batch sizes 2, 8, 16, 64.
SNN_BUILD_LARGE_BATCH_BENCHMARKS	BOOL	OFF	OFF disables batch sizes 8, 16, 32, 64. Slow.
SNN_BUILD_INTERNAL_BENCHMARKS	BOOL	OFF	Builds a large tiled convolution benchmark.
SNN_BUILD_DOCUMENTATION	BOOL	ON	Generates HTML documentation. Requires Doxygen.
SNN_VISIBILITY_HIDDEN	BOOL	ON	Hides library symbols by default, exporting select functions
SNN_FORCE_COLOUR_DIAGNOSTICS	BOOL	ON	Forces compilers to output error messages in colour
SNN_HIGH_MEM_JOB_LIMIT	INT	8	Number of concurrent build jobs for high memory targets (Ninja only)
SNN_DEVICE_TRIPLE	LIST	spir64	Sets the DPC++ device triple(s). Semicolon-separated if multiple flags are passed
SNN_DPCPP_ARCH	STRING	Empty	Sets the specific device architecture for DPC++ builds
SNN_DPCPP_USER_FLAGS	LIST	Empty	Sets the extra compiler flags to pass to DPC++. Semicolon-separated if multiple flags are passed

Download options

Option	Type	Default	Description
SNN_DOWNLOAD_BENCHMARK	BOOL	ON	Download and build Google Benchmark, rather than look locally
BENCHMARK_GIT_TAG	STRING	v1.3.0	Commit-ish object (e.g. tag, branch, commit hash)
SNN_DOWNLOAD_GTEST	BOOL	OFF	Download and build Google Test, rather than look locally
GTEST_GIT_TAG	STRING	release-1.10.0	Commit-ish object (e.g. tag, branch, commit hash)
SNN_DOWNLOAD_EIGEN	BOOL	ON	Download Eigen, rather than look locally
EIGEN_REPO	STRING	Eigen GitLab	The remote to download Eigen from
EIGEN_GIT_TAG	STRING	00de5707	Commit-ish object (e.g. tag, branch, commit hash)
EIGEN_INCLUDE_DIR	STRING	build/eigen	The Eigen include directory. Can be set by download.
SNN_DOWNLOAD_SYCLBLAS	BOOL	ON	Download SYCLBLAS, rather than look locally
sycl_blas_REPO	STRING	Codeplay GitHub	The remote to download SYCLBLAS from
sycl_blas_GIT_TAG	STRING	dd2455c	Commit-ish object (e.g. tag, branch, commit hash)
SNN_DOWNLOAD_MISSING_DEPS	BOOL	ON	Downloads any -NOTFOUND dependencies

Test options

Option	Type	Default	Description
SNN_TEST_EIGEN	BOOL	OFF	Test the Eigen backend
SNN_TEST_EIGEN_MATMULS	BOOL	OFF	Use Eigen matmuls to test convolutions (very slow)
SNN_TEST_SYCLBLAS	BOOL	OFF	Test the SYCLBLAS backend
SNN_TEST_SYCLBLAS_MATMULS	BOOL	OFF	Use SYCLBLAS matmuls to test convolutions (very slow)

Benchmark options

Option	Type	Default	Description
SNN_BENCH_EIGEN	BOOL	OFF	Build benchmarks with Eigen matmul support
SNN_BENCH_SYCLBLAS	BOOL	ON	Build benchmarks with SYCLBLAS support
SNN_BENCH_MKLDNN	BOOL	OFF	Build MKLDNN benchmarks
SNN_BENCH_ARM_COMPUTE	BOOL	OFF	Build ARM Compute Library benchmarks
SNN_BENCH_SNN	BOOL	OFF	Build benchmarks with portDNN matmul support

Eigen options

Option	Type	Default	Description
SNN_EIGEN_LOCAL_MEM	BOOL	ON	Only compile Eigen kernels with local memory support
SNN_EIGEN_NO_LOCAL_MEM	BOOL	OFF	Only compile Eigen kernels without local memory support
SNN_EIGEN_COMPRESS_NAMES	BOOL	OFF	Turns kernel names into hashes to avoid OpenCL driver bugs
SNN_EIGEN_NO_BARRIER	BOOL	OFF	Use barrier-free matmul. Implies NO_LOCAL_MEM.

ComputeCpp options

Option	Type	Default	Description
ComputeCpp_DIR	PATH	unset	The ComputeCpp installation location
ComputeCpp_HOST_DIR	PATH	unset	Crosscompiling only. ComputeCpp location for host arch.
COMPUTECPP_USER_FLAGS	STRING	unset	Flags to be appended to compute++ command line
COMPUTECPP_BITCODE	STRING	spir64	Format of bitcode to be emitted by compiler (spirv64, nvptx64 etc.)

Kernel options

Option	Type	Default	Description
SNN_ENABLE_DOUBLE	BOOL	OFF	Compiles kernels that operate on double-precision floats
SNN_ENABLE_HALF	BOOL	OFF	Compiles kernels that operate on OpenCL half-precision floats
SNN_ENABLE_64BIT_INDICES	BOOL	OFF	Enable 64-bit index types to allow large (> 2bn element) tensors
SNN_CONV2D_STATIC_KERNELS	BOOL	OFF	Enable compilation of static sizes of direct convolutions
SNN_REGISTER_TILE_SPECIALIZATIONS	BOOL	OFF	Specialises register tiles to help compiler keep data in registers

Install options

Option	Type	Default	Description
CMAKE_INSTALL_PREFIX	PATH	/usr/local	Prefix added in front of all install paths
SNN_INSTALL_TESTS	BOOL	OFF	Controls installing tests as part of install target
SNN_INSTALL_BENCHMARKS	BOOL	OFF	Controls installing benchmarks as part of install target
SNN_INSTALL_SAMPLES	BOOL	OFF	Controls installing samples as part of install target