diff options
Diffstat (limited to 'src/tuning/copy.cc')
-rw-r--r-- | src/tuning/copy.cc | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/tuning/copy.cc b/src/tuning/copy.cc new file mode 100644 index 00000000..da223bf0 --- /dev/null +++ b/src/tuning/copy.cc @@ -0,0 +1,83 @@ + +// ================================================================================================= +// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This +// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max- +// width of 100 characters per line. +// +// Author(s): +// Cedric Nugteren <www.cedricnugteren.nl> +// +// This file implements an auto-tuner to tune the copy OpenCL kernels. It uses CLTune. +// +// ================================================================================================= + +#include <string> +#include <vector> +#include <stdexcept> + +#include "internal/utilities.h" +#include "internal/tuning.h" + +namespace clblast { +// ================================================================================================= + +// The copy auto-tuner +template <typename T> +void CopyTune(const Arguments<T> &args, + const std::vector<T> &a_mat, std::vector<T> &b_mat, + cltune::Tuner &tuner) { + + // This points to the CopyMatrix kernel as found in the CLBlast library. This is just one example + // of a copy kernel. However, all copy-kernels use the same tuning parameters, so one has to be + // chosen as a representative. + std::string common_source = + #include "../src/kernels/common.opencl" + std::string kernel_source = + #include "../src/kernels/copy.opencl" + auto sources = common_source + kernel_source; + auto id = tuner.AddKernelFromString(sources, "CopyMatrix", {args.m, args.n}, {1, 1}); + tuner.SetReferenceFromString(sources, "CopyMatrix", {args.m, args.n}, {8, 8}); + + // Sets the tunable parameters and their possible values + tuner.AddParameter(id, "COPY_DIMX", {8, 16, 32}); + tuner.AddParameter(id, "COPY_DIMY", {8, 16, 32}); + tuner.AddParameter(id, "COPY_WPT", {1, 2, 4, 8}); + tuner.AddParameter(id, "COPY_VW", {1, 2, 4, 8}); + + // Tests for a specific precision + tuner.AddParameter(id, "PRECISION", {static_cast<size_t>(args.precision)}); + tuner.AddParameterReference("PRECISION", static_cast<size_t>(args.precision)); + + // Modifies the thread-sizes (both global and local) based on the parameters + tuner.MulLocalSize(id, {"COPY_DIMX", "COPY_DIMY"}); + tuner.DivGlobalSize(id, {"COPY_VW", "COPY_WPT"}); + + // Sets the function's arguments + tuner.AddArgumentScalar(static_cast<int>(args.m)); + tuner.AddArgumentInput(a_mat); + tuner.AddArgumentOutput(b_mat); +} + +// ================================================================================================= + +// Main function which calls the common client code with the routine-specific function as argument. +void TunerCopy(int argc, char *argv[]) { + switch(GetPrecision(argc, argv)) { + case Precision::kHalf: throw std::runtime_error("Unsupported precision mode"); + case Precision::kSingle: TunerAB<float>(argc, argv, CopyTune<float>); break; + case Precision::kDouble: TunerAB<double>(argc, argv, CopyTune<double>); break; + case Precision::kComplexSingle: TunerAB<float2>(argc, argv, CopyTune<float2>); break; + case Precision::kComplexDouble: TunerAB<double2>(argc, argv, CopyTune<double2>); break; + } +} + +// ================================================================================================= +} // namespace clblast + +// Main function (not within the clblast namespace) +int main(int argc, char *argv[]) { + clblast::TunerCopy(argc, argv); + return 0; +} + +// ================================================================================================= |