135 lines
2.8 KiB
C++
135 lines
2.8 KiB
C++
// Copyright (c) 2020 Tom Deakin
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// University of Bristol HPC
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//
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// For full license terms please see the LICENSE file distributed with this
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// source code
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#include "TBBStream.hpp"
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template <class T>
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TBBStream<T>::TBBStream(const int ARRAY_SIZE, int device)
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: partitioner(), range(0, ARRAY_SIZE), a(ARRAY_SIZE), b(ARRAY_SIZE), c(ARRAY_SIZE)
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{
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if(device != 0){
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throw std::runtime_error("Device != 0 is not supported by TBB");
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}
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std::cout << "Using TBB partitioner: " PARTITIONER_NAME << std::endl;
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}
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template <class T>
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void TBBStream<T>::init_arrays(T initA, T initB, T initC)
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{
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tbb::parallel_for(range, [&](const tbb::blocked_range<size_t>& r) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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a[i] = initA;
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b[i] = initB;
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c[i] = initC;
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}
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}, partitioner);
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}
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template <class T>
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void TBBStream<T>::read_arrays(std::vector<T>& h_a, std::vector<T>& h_b, std::vector<T>& h_c)
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{
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// Element-wise copy.
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h_a = a;
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h_b = b;
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h_c = c;
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}
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template <class T>
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void TBBStream<T>::copy()
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{
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tbb::parallel_for(range, [&](const tbb::blocked_range<size_t>& r) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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c[i] = a[i];
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}
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}, partitioner);
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}
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template <class T>
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void TBBStream<T>::mul()
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{
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const T scalar = startScalar;
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tbb::parallel_for(range, [&](const tbb::blocked_range<size_t>& r) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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b[i] = scalar * c[i];
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}
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}, partitioner);
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}
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template <class T>
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void TBBStream<T>::add()
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{
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tbb::parallel_for(range, [&](const tbb::blocked_range<size_t>& r) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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c[i] = a[i] + b[i];
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}
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}, partitioner);
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}
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template <class T>
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void TBBStream<T>::triad()
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{
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const T scalar = startScalar;
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tbb::parallel_for(range, [&](const tbb::blocked_range<size_t>& r) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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a[i] = b[i] + scalar * c[i];
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}
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}, partitioner);
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}
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template <class T>
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void TBBStream<T>::nstream()
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{
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const T scalar = startScalar;
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tbb::parallel_for(range, [&](const tbb::blocked_range<size_t>& r) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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a[i] += b[i] + scalar * c[i];
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}
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}, partitioner);
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}
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template <class T>
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T TBBStream<T>::dot()
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{
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// sum += a[i] * b[i];
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return
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tbb::parallel_reduce(range, T{}, [&](const tbb::blocked_range<size_t>& r, T acc) {
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for (size_t i = r.begin(); i < r.end(); ++i) {
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acc += a[i] * b[i];
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}
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return acc;
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}, std::plus<T>(), partitioner);
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}
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void listDevices(void)
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{
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std::cout << "Listing devices is not supported by TBB" << std::endl;
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}
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std::string getDeviceName(const int device)
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{
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return std::string("Device name unavailable");
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}
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std::string getDeviceDriver(const int)
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{
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return std::string("Device driver unavailable");
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}
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template class TBBStream<float>;
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template class TBBStream<double>;
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