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// =================================================================================================
// 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 uses the auto-tuner to tune the copy OpenCL kernels.
//
// =================================================================================================
#include <string>
#include <vector>
#include "utilities/utilities.hpp"
#include "tuning/tuning.hpp"
namespace clblast {
// =================================================================================================
// See comment at top of file for a description of the class
template <typename T>
class TuneCopy {
public:
// Settings for this kernel (default command-line arguments)
static TunerDefaults GetTunerDefaults() {
auto settings = TunerDefaults();
settings.options = {kArgM, kArgN, kArgAlpha};
settings.default_m = 1024;
settings.default_n = 1024;
return settings;
}
// Settings for this kernel (general)
static TunerSettings GetTunerSettings(const Arguments<T> &args) {
auto settings = TunerSettings();
// Identification of the kernel
settings.kernel_family = "copy";
settings.kernel_name = "CopyMatrixFast";
settings.sources =
#include "../src/kernels/level3/level3.opencl"
#include "../src/kernels/level3/copy_fast.opencl"
;
// Buffer sizes
settings.size_a = args.m * args.n;
settings.size_b = args.m * args.n;
// Inputs and outputs IDs (X:0, Y:1, A:2, B:3, C:4, temp:5)
settings.inputs = {2, 3};
settings.outputs = {3};
// Sets the base thread configuration
settings.global_size = {args.m, args.n};
settings.global_size_ref = settings.global_size;
settings.local_size = {1, 1};
settings.local_size_ref = {8, 8};
// Transforms the thread configuration based on the parameters
settings.mul_local = {{"COPY_DIMX", "COPY_DIMY"}};
settings.div_global = {{"COPY_VW", "COPY_WPT"}};
// Sets the tuning parameters and their possible values
settings.parameters = {
{"COPY_DIMX", {8, 16, 32}},
{"COPY_DIMY", {8, 16, 32}},
{"COPY_WPT", {1, 2, 4, 8}},
{"COPY_VW", {1, 2, 4, 8}},
};
// Describes how to compute the performance metrics
settings.metric_amount = 2 * args.m * args.n * GetBytes(args.precision);
settings.performance_unit = "GB/s";
return settings;
}
// Tests for valid arguments
static void TestValidArguments(const Arguments<T> &) { }
static std::vector<Constraint> SetConstraints() { return {}; }
// Sets the kernel's arguments
static void SetArguments(Kernel &kernel, const Arguments<T> &args,
std::vector<Buffer<T>>& buffers) {
kernel.SetArgument(0, static_cast<int>(args.m));
kernel.SetArgument(1, buffers[2]()); // 2 == A matrix
kernel.SetArgument(2, buffers[3]()); // 3 == B matrix
kernel.SetArgument(3, GetRealArg(args.alpha));
}
};
// =================================================================================================
} // namespace clblast
// Shortcuts to the clblast namespace
using half = clblast::half;
using float2 = clblast::float2;
using double2 = clblast::double2;
// Main function (not within the clblast namespace)
int main(int argc, char *argv[]) {
const auto command_line_args = clblast::RetrieveCommandLineArguments(argc, argv);
switch(clblast::GetPrecision(command_line_args)) {
case clblast::Precision::kHalf: clblast::Tuner<clblast::TuneCopy<half>, half>(argc, argv); break;
case clblast::Precision::kSingle: clblast::Tuner<clblast::TuneCopy<float>, float>(argc, argv); break;
case clblast::Precision::kDouble: clblast::Tuner<clblast::TuneCopy<double>, double>(argc, argv); break;
case clblast::Precision::kComplexSingle: clblast::Tuner<clblast::TuneCopy<float2>, float2>(argc, argv); break;
case clblast::Precision::kComplexDouble: clblast::Tuner<clblast::TuneCopy<double2>, double2>(argc, argv); break;
}
return 0;
}
// =================================================================================================
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