50 lines
945 B
C++
50 lines
945 B
C++
#include <iostream>
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#include <cmath>
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#include <omp.h>
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#include <cstring>
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#include <chrono>
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#include <vector>
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#include <iostream>
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int main(int argc, char **argv) {
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size_t numThreads = std::stoi(argv[1]);
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std::vector<size_t> totals(numThreads, 0);
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omp_set_num_threads(numThreads);
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auto start = std::chrono::system_clock::now();
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double time = std::stod(argv[2]);
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#pragma omp parallel
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{
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size_t tid = omp_get_thread_num();
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double a = rand();
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while (true) {
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for (size_t i = 0; i < 500; ++i) {
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double x;
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asm volatile(""::"r"(a));
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x = sqrt(a);
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asm volatile(""::"r"(x));
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asm volatile(""::"r"(a));
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x = sqrt(a);
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asm volatile(""::"r"(x));
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}
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totals[tid] += 1000;
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auto elapsed = (std::chrono::system_clock::now() - start).count() / 1e9;
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if (elapsed > time) {
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break;
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}
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}
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}
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size_t sum = 0;
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for (auto t : totals) {
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sum += t;
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}
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std::cout << (double)sum / time << "\n";
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};
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