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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 xger OpenCL kernels.
//
// =================================================================================================
#include <string>
#include <vector>
#include "utilities/utilities.hpp"
#include "tuning/tuning.hpp"
namespace clblast {
// =================================================================================================
// Settings for this kernel (default command-line arguments)
TunerDefaults XgerGetTunerDefaults(const int) {
auto settings = TunerDefaults();
settings.options = {kArgM, kArgN, kArgAlpha};
settings.default_m = 1024;
settings.default_n = 1024;
return settings;
}
// Settings for this kernel (general)
template <typename T>
TunerSettings XgerGetTunerSettings(const int, const Arguments<T> &args) {
auto settings = TunerSettings();
// Identification of the kernel
settings.kernel_family = "xger";
settings.kernel_name = "Xger";
settings.sources =
#include "../src/kernels/level2/level2.opencl"
#include "../src/kernels/level2/xger.opencl"
;
// Buffer sizes
settings.size_x = args.m;
settings.size_y = args.n;
settings.size_a = args.m * args.n;
// Inputs and outputs IDs (X:0, Y:1, A:2, B:3, C:4, temp:5)
settings.inputs = {0, 1, 2};
settings.outputs = {2};
// 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 = {{"WGS1", "WGS2"}};
settings.div_global = {{"WPT", "WPT"}};
// Sets the tuning parameters and their possible values
settings.parameters = {
{"WGS1", {4, 8, 16, 32, 64, 128, 256, 512}},
{"WGS2", {1, 2, 4, 8, 16, 32, 64, 128, 256}},
{"WPT", {1, 2, 4}},
};
// Describes how to compute the performance metrics
settings.metric_amount = (2*args.m*args.n + args.m + args.n) * GetBytes(args.precision);
settings.performance_unit = "GB/s";
return settings;
}
// Tests for valid arguments
template <typename T>
void XgerTestValidArguments(const int, const Arguments<T> &) { }
std::vector<Constraint> XgerSetConstraints(const int) { return {}; }
template <typename T>
LocalMemSizeInfo XgerComputeLocalMemSize(const int) {
return { [] (std::vector<size_t>) -> size_t { return 0; }, {} };
}
// Sets the kernel's arguments
template <typename T>
void XgerSetArguments(const int, Kernel &kernel, const Arguments<T> &args, std::vector<Buffer<T>>& buffers) {
kernel.SetArgument(0, static_cast<int>(args.m));
kernel.SetArgument(1, static_cast<int>(args.n));
kernel.SetArgument(2, GetRealArg(args.alpha));
kernel.SetArgument(3, buffers[0]()); // 0 == X vector
kernel.SetArgument(4, 0); // x_offset
kernel.SetArgument(5, 1); // x_increment
kernel.SetArgument(6, buffers[1]()); // 1 == Y vector
kernel.SetArgument(7, 0); // y_offset
kernel.SetArgument(8, 1); // y_increment
kernel.SetArgument(9, buffers[2]()); // 2 == A matrix
kernel.SetArgument(10, 0); // a_offset
kernel.SetArgument(11, static_cast<int>(args.m)); // a_ld
kernel.SetArgument(12, 0); // a_is_rowmajor
}
// =================================================================================================
} // namespace clblast
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