[dpdk-users] [dpdk-dev] IXBGE VF: link state detection
gregory at weka.io
Thu May 25 05:48:13 CEST 2017
After the revert, my environment reproduced link up detection failure almost immediately
With the patch the fault is rare.
On Wednesday, 24 May 2017 16:26:47 IDT Olivier Matz wrote:
> Hi Gregory,
> On Wed, 24 May 2017 12:50:19 +0300, Gregory Etelson <gregory at weka.io> wrote:
> > Hello,
> > 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
> It looks there is at least one issue with
> commit c12d22f65b13 ("net/ixgbe: ensure link status is updated")
> Someone already complained about a problem related to the link status
> on ixgbe (which is probably different than yours):
> Anyway, maybe you can try to revert this patch and see if it
> solves your issue?
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