Function print_duration

common/train.cpp:385–406

}

void print_duration(double fmillis) {
    if (fmillis < 1000.0f) {
        printf("%.1fms", (float) fmillis);
        return;
    }
    const int64_t one_sec  = 1000;
    const int64_t one_min  = one_sec  * 60;
    const int64_t one_hour = one_min  * 60;
    const int64_t one_day  = one_hour * 24;

    int64_t millis  = (int64_t) fmillis;
    int64_t days    = millis/one_day;
    int64_t hours   = (millis - days*one_day)/one_hour;
    int64_t minutes = (millis - days*one_day - hours*one_hour)/one_min;
    int64_t seconds = (millis - days*one_day - hours*one_hour - minutes*one_min)/one_sec;

    // to print int64_t either cast to (long long int) or use macro PRId64 from <inttypes.h>
    if (days > 0) {
        printf("%lldd ", (long long int) days);
    }
    printf("%02lld:%02lld:%02lld", (long long int) hours, (long long int) minutes, (long long int) seconds);
}

float cosine_decay(int64_t step, int64_t decay_steps, float minimum) {
    if (step > decay_steps) {