https://bugs.dpdk.org/show_bug.cgi?id=1132
Bug ID: 1132
Summary: net/i40e changes recommended Rx ring_size after device
start
Product: DPDK
Version: 22.11
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: andrew.rybche...@oktetlabs.ru
Target Milestone: ---
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
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