Bug 1132
| Summary: | net/i40e changes recommended Rx ring_size after device start | ||
|---|---|---|---|
| Product: | DPDK | Reporter: | Andrew Rybchenko (andrew.rybchenko) |
| Component: | ethdev | Assignee: | Zhang Yuying (yuying.zhang) |
| Status: | UNCONFIRMED --- | ||
| Severity: | normal | CC: | beilei.xing, dev, kaiwenx.deng |
| Priority: | Normal | ||
| Version: | 22.11 | ||
| Target Milestone: | --- | ||
| Hardware: | All | ||
| OS: | All | ||
please offer the reproduce steps with standard DPDK API like testpmd, l3fwd and other examples. |
net/i40e changes recommended Rx ring_size after device start NIC is Intel X710 It does not make sense since all Rx queues are typically already configured and started. It happens because of link_speeds condition above: 790 »·······} else { 3791 »·······»·······/* For X710 */ 3792 »·······»·······dev_info->speed_capa = RTE_ETH_LINK_SPEED_1G | RTE_ETH_LINK_SPEED_10G; 3793 »·······»·······dev_info->default_rxportconf.nb_queues = 1; 3794 »·······»·······dev_info->default_txportconf.nb_queues = 1; 3795 »·······»·······if (dev->data->dev_conf.link_speeds & RTE_ETH_LINK_SPEED_10G) { 3796 »·······»·······»·······dev_info->default_rxportconf.ring_size = 512; 3797 »·······»·······»·······dev_info->default_txportconf.ring_size = 256; 3798 »·······»·······} else { 3799 »·······»·······»·······dev_info->default_rxportconf.ring_size = 256; 3800 »·······»·······»·······dev_info->default_txportconf.ring_size = 256; 3801 »·······»·······} 3802 »·······} which are updated on device start in i40e_apply_link_speed(). Before start default_rxportconf.ring_size is 256, after start it is 512. Found using [1] [1] https://ts-factory.io/doc/dpdk-ethdev-ts/generated/rst/group_usecases-dev_info_persistence.html#doxid-group-usecases-dev-info-persistence