Hi matan and thomas: When I call rte_eth_dev_rx_intr_ctl_q in secondary process, I found dev->intr_handle->intr_vec is NULL. https://github.com/DPDK/dpdk/blob/v19.11/lib/librte_ethdev/rte_ethdev.c#L4120 I wonder if this is a bug or rx interrupts can't work in secondary prcess.