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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 demonstrates the use of the runtime tuning API. It is a stand-alone example, but it
// does require the Khronos C++ OpenCL API header file (downloaded by CMake).
//
// =================================================================================================
#include <cstdio>
#include <chrono>
#include <vector>
#define CL_USE_DEPRECATED_OPENCL_1_1_APIS // to disable deprecation warnings
#define CL_USE_DEPRECATED_OPENCL_1_2_APIS // to disable deprecation warnings
// Includes the C++ OpenCL API. If not yet available, it can be found here:
// https://raw.githubusercontent.com/KhronosGroup/OpenCL-CLHPP/main/include/CL/opencl.hpp
#define CL_HPP_TARGET_OPENCL_VERSION 120
#define CL_HPP_MINIMUM_OPENCL_VERSION 120
#define CL_TARGET_OPENCL_VERSION 120
#include "opencl.hpp"
// Includes the CLBlast library
#include <clblast.h>
// =================================================================================================
int main() {
// OpenCL platform/device settings
const auto platform_id = 0;
const auto device_id = 0;
// Example arguments
const size_t m = 128;
const size_t n = 64;
const auto fraction = 1.0; // between 0.0 and 1.0
// Initializes the OpenCL platform
auto platforms = std::vector<cl::Platform>();
cl::Platform::get(&platforms);
if (platforms.size() == 0 || platform_id >= platforms.size()) { return 1; }
auto platform = platforms[platform_id];
// Initializes the OpenCL device
auto devices = std::vector<cl::Device>();
platform.getDevices(CL_DEVICE_TYPE_ALL, &devices);
if (devices.size() == 0 || device_id >= devices.size()) { return 1; }
auto device = devices[device_id];
// Creates the OpenCL context, queue, and an event
auto device_as_vector = std::vector<cl::Device>{device};
auto context = cl::Context(device_as_vector);
auto queue = cl::CommandQueue(context, device);
// Performs the tuning
printf("Starting the tuning...\n");
std::unordered_map<std::string,size_t> parameters;
auto queue_plain = queue();
auto status = clblast::TuneCopy<float>(&queue_plain, m, n, fraction, parameters);
// Tuning completed. See "clblast.h" for status codes (0 -> success).
printf("Completed TuneCopy with status %d (0 == OK), found parameters:\n", static_cast<int>(status));
for (const auto ¶meter: parameters) {
printf("> %s = %zu\n", parameter.first.c_str(), parameter.second);
}
// Set the new parameters
status = clblast::OverrideParameters(device(), "Copy", clblast::Precision::kSingle, parameters);
printf("Completed OverrideParameters with status %d (0 == OK)\n", static_cast<int>(status));
return 0;
}
// =================================================================================================
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