81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
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// =================================================================================================
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// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
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// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
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// width of 100 characters per line.
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//
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// Author(s):
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// Cedric Nugteren <www.cedricnugteren.nl>
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//
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// This file demonstrates the use of the runtime tuning API. It is a stand-alone example, but it
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// does require the Khronos C++ OpenCL API header file (downloaded by CMake).
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//
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// =================================================================================================
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#include <cstdio>
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#include <chrono>
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#include <vector>
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#define CL_USE_DEPRECATED_OPENCL_1_1_APIS // to disable deprecation warnings
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#define CL_USE_DEPRECATED_OPENCL_1_2_APIS // to disable deprecation warnings
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// Includes the C++ OpenCL API. If not yet available, it can be found here:
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// https://raw.githubusercontent.com/KhronosGroup/OpenCL-CLHPP/main/include/CL/opencl.hpp
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#define CL_HPP_TARGET_OPENCL_VERSION 120
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#define CL_HPP_MINIMUM_OPENCL_VERSION 120
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#define CL_TARGET_OPENCL_VERSION 120
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#include "opencl.hpp"
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// Includes the CLBlast library
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#include <clblast.h>
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// =================================================================================================
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int main() {
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// OpenCL platform/device settings
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const auto platform_id = 0;
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const auto device_id = 0;
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// Example arguments
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const size_t m = 128;
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const size_t n = 64;
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const auto fraction = 1.0; // between 0.0 and 1.0
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// Initializes the OpenCL platform
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auto platforms = std::vector<cl::Platform>();
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cl::Platform::get(&platforms);
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if (platforms.size() == 0 || platform_id >= platforms.size()) { return 1; }
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auto platform = platforms[platform_id];
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// Initializes the OpenCL device
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auto devices = std::vector<cl::Device>();
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platform.getDevices(CL_DEVICE_TYPE_ALL, &devices);
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if (devices.size() == 0 || device_id >= devices.size()) { return 1; }
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auto device = devices[device_id];
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// Creates the OpenCL context, queue, and an event
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auto device_as_vector = std::vector<cl::Device>{device};
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auto context = cl::Context(device_as_vector);
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auto queue = cl::CommandQueue(context, device);
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// Performs the tuning
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printf("Starting the tuning...\n");
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std::unordered_map<std::string,size_t> parameters;
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auto queue_plain = queue();
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auto status = clblast::TuneCopy<float>(&queue_plain, m, n, fraction, parameters);
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// Tuning completed. See "clblast.h" for status codes (0 -> success).
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printf("Completed TuneCopy with status %d (0 == OK), found parameters:\n", static_cast<int>(status));
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for (const auto ¶meter: parameters) {
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printf("> %s = %zu\n", parameter.first.c_str(), parameter.second);
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}
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// Set the new parameters
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status = clblast::OverrideParameters(device(), "Copy", clblast::Precision::kSingle, parameters);
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printf("Completed OverrideParameters with status %d (0 == OK)\n", static_cast<int>(status));
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return 0;
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}
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// =================================================================================================
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