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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 xdot OpenCL kernels. Note that the results are
// not verified, since the result is not final and depends on the WGS2 parameter.
//
// =================================================================================================
#include <string>
#include <vector>
#include "utilities/utilities.hpp"
#include "tuning/tuning.hpp"
namespace clblast {
// =================================================================================================
// Settings for this kernel (default command-line arguments)
TunerDefaults XdotGetTunerDefaults(const int) {
auto settings = TunerDefaults();
settings.options = {kArgN};
settings.default_n = 2*1024*1024;
return settings;
}
// Settings for this kernel (general)
template <typename T>
TunerSettings XdotGetTunerSettings(const int V, const Arguments<T> &args) {
auto settings = TunerSettings();
// Identification of the kernel
settings.kernel_family = "xdot_"+std::to_string(V);
settings.kernel_name = (V==1) ? "Xdot" : "XdotEpilogue";
settings.sources =
#include "../src/kernels/level1/xdot.opencl"
;
// Buffer sizes
settings.size_x = args.n;
settings.size_y = args.n;
settings.size_temp = args.n; // Worst case
// Inputs and outputs IDs (X:0, Y:1, A:2, B:3, C:4, temp:5)
settings.inputs = {0, 1, 5};
settings.outputs = {}; // no output checking
// Sets the base thread configuration
settings.global_size = (V==1) ? std::vector<size_t>{2*64} : std::vector<size_t>{1};
settings.global_size_ref = (V==1) ? std::vector<size_t>{2*64*64} : std::vector<size_t>{64};
settings.local_size = {1};
settings.local_size_ref = {64};
// Transforms the thread configuration based on the parameters
settings.mul_local = (V==1) ? TransformVector{{"WGS1"}} : TransformVector{{"WGS2"}};
settings.mul_global = (V==1) ? TransformVector{{"WGS1"}} : TransformVector{{"WGS2"}};
// Sets the tuning parameters and their possible values
settings.parameters = {
{"WGS"+std::to_string(V), {32, 64, 128, 256, 512, 1024}},
};
// Describes how to compute the performance metrics
settings.metric_amount = (V==1) ? (2*args.n + 1) * GetBytes(args.precision) : 1 * GetBytes(args.precision);
settings.performance_unit = (V==1) ? "GB/s" : "N/A";
return settings;
}
// Tests for valid arguments
template <typename T>
void XdotTestValidArguments(const int, const Arguments<T> &) { }
std::vector<Constraint> XdotSetConstraints(const int) { return {}; }
template <typename T>
LocalMemSizeInfo XdotComputeLocalMemSize(const int V) {
return {
[] (std::vector<size_t> v) -> size_t {
return GetBytes(PrecisionValue<T>()) * v[0];
},
{"WGS"+std::to_string(V)}
};}
// Sets the kernel's arguments
template <typename T>
void XdotSetArguments(const int V, Kernel &kernel, const Arguments<T> &args, std::vector<Buffer<T>>& buffers) {
if (V == 1) {
kernel.SetArgument(0, static_cast<int>(args.n));
kernel.SetArgument(1, buffers[0]()); // 0 == X vector
kernel.SetArgument(2, 0);
kernel.SetArgument(3, 1);
kernel.SetArgument(4, buffers[1]()); // 1 == Y vector
kernel.SetArgument(5, 0);
kernel.SetArgument(6, 1);
kernel.SetArgument(7, buffers[5]()); // 5 == temp; no output checking - size varies
kernel.SetArgument(8, static_cast<int>(false));
}
else {
kernel.SetArgument(0, buffers[5]()); // 5 == temp
kernel.SetArgument(1, buffers[0]()); // 0 == X vector; no output checking - size varies
kernel.SetArgument(2, 0);
}
}
// =================================================================================================
} // namespace clblast
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