[dpdk-users] IXBGE VF: link state detection

Gregory Etelson gregory at weka.io
Wed May 24 11:50:19 CEST 2017


In my tests DPDK-17.05.0 process queries link state with rte_eth_link_get() each 50 msec
during 5-20 MB/sec IOs flow.
I turn Ethernet switch port down and up and check IXGBE VF PMD reaction to link state changes. 
VF PMD correctly recognize link down events but may miss link up.
When the fault occurs, subsequent calls to rte_eth_link_get will return link_status == 0 forever.
I need to reset DPDK process to get correct link state value.
My debugging shows that in case of the fault, mbx->ops.read(hw, &in_msg, 1, 0) in ixgbe_check_mac_link_vf
keeps returning non-zero value


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