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Introducing the DEV_TX_OFFLOAD_MT_LOCKFREE TX capability flag. if a PMD advertises DEV_TX_OFFLOAD_MT_LOCKFREE capable, multiple threads can invoke rte_eth_tx_burst() concurrently on the same tx queue without SW lock. This PMD feature will be useful in the following use cases and found in the OCTEON family of NPUs. 1) Remove explicit spinlock in some applications where lcores to TX queues are not mapped 1:1. example: OVS has such instance https://github.com/openvswitch/ovs/blob/master/lib/netdev-dpdk.c#L299 https://github.com/openvswitch/ovs/blob/master/lib/netdev-dpdk.c#L1859 See the the usage of tx_lock spinlock. 2) In the eventdev use case, avoid dedicating a separate TX core for transmitting and thus enables more scaling as all workers can send the packets. Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com> Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com> Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com> |
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DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD license for the core libraries and drivers. The kernel components are GPLv2 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org