On Sat, 24 Oct 2026 15:10:13 +0100 Marat Khalili <[email protected]> wrote:
> On 19/10/2026 22:10, Konstantin Ananyev wrote: > >> Document the data plane limitation in the file docstring of > >> rte_bpf_ethdev.h: packet callback execution expects only one > >> thread per port/queue pair at a time, making concurrent bursts > >> (such as with RTE_ETH_TX_OFFLOAD_MT_LOCKFREE, shared RX queues, > >> or multi-threaded software PMDs) unsupported. > > Not sure what do you mean by: > > 'shared RX queues' and 'multi-threaded software PMDs'. Can you > > probably clarify? > > I mean any hypothetical solutions that call rx/tx burst concurrently > from multiple threads or processes. To avoid confusion, will just leave > only an RTE_ETH_TX_OFFLOAD_MT_LOCKFREE example in the next version. Other than TX lockfree DPDK is not safe to use rx/tx burst from multiple threads on the same queue. The queue either needs to be bound to a thread, or locking in the application. Many drivers would break if Rx was called concurrently on multiple threads. This design is intentional and one of the reasons DPDK is fast.
