OCCA is an open-source (MIT license) library used to program current multi-core/many-core architectures. Devices (such as CPUs, GPUs, Intel's Xeon Phi, FPGAs, etc) are abstracted using an offload-model for application development and programming for the devices is done through a C-based (OKL) kernel. OCCA gives developers the ability to target devices at run-time by using run-time compilation for device kernels.
git clone https://github.com/libocca/occa.git
cd occa
make -j 4Setup environment variables inside the occa directory
export OCCA_DIR="${PWD}"
export PATH+=":${OCCA_DIR}"
export LD_LIBRARY_PATH+=":${OCCA_DIR}/lib"export OCCA_DIR="${PWD}"
export PATH+=":${OCCA_DIR}"
export DYLD_LIBRARY_PATH+=":${OCCA_DIR}/lib"cd ${OCCA_DIR}/examples/1_add_vectors/cpp
make
./mainThere is an executable occa provided inside ${OCCA_DIR}/bin
> occa --help
Usage: occa COMMAND
Can be used to display information of cache kernels.
Commands:
autocomplete Prints shell functions to autocomplete occa
commands and arguments
cache Cache kernels
clear Clears cached files and cache locks
env Print environment variables used in OCCA
info Prints information about available OCCA modes
version Prints OCCA library version
Arguments:
COMMAND Command to run. <(occa autocomplete bash)| Environment Variable | Description |
|---|---|
| OCCA_DIR | Directory where OCCA is installed, overwrites occa::OCCA_DIR set at compile-time |
| OCCA_CACHE_DIR | Directory where kernels get cached (Default: ${HOME}/.occa) |
| OCCA_INCLUDE_PATH | Path to find headers, such as CUDA and OpenCL headers (: delimited) |
| OCCA_LIBRARY_PATH | Path to find .so libraries (: delimited) |
| OCCA_CXX | C++ compiler used for run-time kernel compilation |
| OCCA_CXXFLAGS | C++ compiler flags used for run-time kernel compilation |
| OCCA_OPENCL_COMPILER_FLAGS | Additional OpenCL flags when compiling kernels |
| OCCA_CUDA_COMPILER | Compiler used for run-time CUDA kernel compilation |
| OCCA_CUDA_COMPILER_FLAGS | CUDA compiler flags used for run-time kernel compilation |
| OCCA_VERBOSE | Verbose logging is suppresed if set to either: 0, n, no, false (Default: false) |
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