Function LRU_CLOCK

src/evict.cpp:81–89

This function is used to obtain the current LRU clock. * If the current resolution is lower than the frequency we refresh the * LRU clock (as it should be in production servers) we return the * precomputed value, otherwise we need to resort to a system call. */

 * LRU clock (as it should be in production servers) we return the
 * precomputed value, otherwise we need to resort to a system call. */
unsigned int LRU_CLOCK(void) {
    unsigned int lruclock;
    if (1000/g_pserver->hz <= LRU_CLOCK_RESOLUTION) {
        lruclock = g_pserver->lruclock;
    } else {
        lruclock = getLRUClock();
    }
    return lruclock;
}

/* Given an object returns the min number of milliseconds the object was never
 * requested, using an approximated LRU algorithm. */