Function notify_all

runtime/Perf.cc:858–869

Cost of notifying a condition variable

// Cost of notifying a condition variable
double notify_all() {
    int count = 1000000;
    std::condition_variable cond;

    uint64_t start = Cycles::rdtsc();
    for (int i = 0; i < count; ++i) {
        cond.notify_all();
    }
    uint64_t stop = Cycles::rdtsc();

    return Cycles::toSeconds(stop - start)/count;
}

double notify_one() {
    int count = 1000000;