On Mon, 17 Feb 2025 18:57:00 +0000 Changchun Zhang <changchun.zh...@oracle.com> wrote:
> Hi Harry, > > Can we call rte_eth_dev_rx_queue_stop() on a rx queue when a fast path is > still polling the queue? The sequence on control and fast path cores would > like: > Control path: > rte_eth_dev_rx_queue_stop(rx_queue_id); > ...waiting for draining of rx_queue... > rte_eth_dev_stop() > .... > > Fast path: > Keep calling rte_eth_rx_burst() > (I am expecting it will return 0 if queue is already drained and stopped) > No. The application needs to not call rx_burst when stop is being done. There rx_burst is a fast path with no additional checks and is intentionally not thread safe. You need to coordinate queue management inside the application.
