* [Intel-wired-lan] ixgbevf RX latency outliers
@ 2017-12-04 21:41 Joe Buehler
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From: Joe Buehler @ 2017-12-04 21:41 UTC (permalink / raw)
To: intel-wired-lan
I am using the ixgbevf driver shipped with the 4.4.86 LINUX
realtime-patched kernel in a VM using SRIOV.
The kernel is timestamping incoming frames and in general is doing a
great job but I am having some difficulties with RX latency outliers.
Presumably something is not servicing the NIC in a timely fashion, or
the NIC is holding on to frames too long. I am looking for some info on
the design of the driver, the intent being perhaps to change NIC config,
revise RT priorities and/or thread affinities.
There appear to be 3 IRQ threads for example -- what are they for?
Any help much appreciated.
Joe
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2017-12-04 21:41 [Intel-wired-lan] ixgbevf RX latency outliers Joe Buehler
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