print_kpps(tx_fail_col, row, last->drop_tx_fail - prev->drop_tx_fail, delta_t);
print_kpps(discard_col, row, last->drop_discard - prev->drop_discard, delta_t);
print_kpps(handled_col, row, last->drop_handled - prev->drop_handled, delta_t);
print_kpps(tx_fail_col, row, last->drop_tx_fail - prev->drop_tx_fail, delta_t);
print_kpps(discard_col, row, last->drop_discard - prev->drop_discard, delta_t);
print_kpps(handled_col, row, last->drop_handled - prev->drop_handled, delta_t);