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sleeper.cpp
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| #include <chrono> | |
| #include <iostream> | |
| #include <thread> | |
| #include <atomic> | |
| #include <cmath> | |
| #include <vector> | |
| #include <algorithm> | |
| using namespace std; | |
| using namespace std::chrono; | |
| int main() | |
| { | |
| atomic_int thingy = 0; | |
| atomic<chrono::time_point<chrono::high_resolution_clock>> sent = chrono::high_resolution_clock::now(); | |
| thread runner([&thingy, &sent] { | |
| int localThingy = 0; | |
| std::vector<double> waitsPerFrame; | |
| waitsPerFrame.reserve(1000); | |
| while(1) | |
| { | |
| waitsPerFrame.clear(); | |
| while(localThingy > thingy.load()) | |
| { | |
| //this_thread::yield(); | |
| this_thread::sleep_for(1ms); | |
| auto received = chrono::high_resolution_clock::now(); | |
| waitsPerFrame.push_back(chrono::duration_cast<chrono::microseconds>(received - sent.load()).count() / 1000.0); | |
| } | |
| static int t = 0; | |
| t++; | |
| if(t % 60 == 0) | |
| { | |
| cout << "latency range: " << *min_element(waitsPerFrame.begin(), waitsPerFrame.end()) << " ms to "; | |
| cout << *max_element(waitsPerFrame.begin(), waitsPerFrame.end()) << " ms" << endl; | |
| } | |
| localThingy++; | |
| //cout << "doing things at 60 fps" << endl; | |
| } | |
| }); | |
| while(1) | |
| { | |
| sent = chrono::high_resolution_clock::now(); | |
| thingy++; | |
| int usec = (int)round((1.0 / 60) * 1000000); | |
| std::this_thread::sleep_until(steady_clock::now() + microseconds(usec)); | |
| } | |
| return 0; | |
| } |
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