33 lines · cpp
1#include <thread>2 3const size_t kAllocSize = 16;4const size_t kInitialNumAllocs = 1 << 10;5const size_t kPeriodicNumAllocs = 1 << 10;6const size_t kNumIterations = 1 << 7;7const size_t kNumThreads = 16;8 9void Thread() {10 char *InitialAllocations[kInitialNumAllocs];11 char *PeriodicaAllocations[kPeriodicNumAllocs];12 for (auto &p : InitialAllocations) p = new char[kAllocSize];13 for (size_t i = 0; i < kNumIterations; i++) {14 for (size_t j = 0; j < kPeriodicNumAllocs; j++) {15 for (auto &p : PeriodicaAllocations) {16 p = new char[kAllocSize];17 *p = 0;18 }19 for (auto p : PeriodicaAllocations) delete [] p;20 }21 }22 for (auto p : InitialAllocations) delete [] p;23}24 25int main() {26 std::thread *Threads[kNumThreads];27 for (auto &T : Threads) T = new std::thread(&Thread);28 for (auto T : Threads) {29 T->join();30 delete T;31 }32}33