V_pf_counter_periodic_iter
if ((V_pf_counter_periodic_iter % (pf_purge_thread_period * 10 * 60)) != 0) {
if ((V_pf_counter_periodic_iter % (pf_purge_thread_period * 10 * 300)) != 0) {
if ((V_pf_counter_periodic_iter % (pf_purge_thread_period * 10 * 300)) != 0) {
V_pf_counter_periodic_iter++;