Packet loss > 900 kPPS - Githubissues

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Packet loss > 900 kPPS #142

Open krjoshi opened 7 years ago

krjoshi commented 7 years ago

Packet loss when using VFd through a switch has been reported. No packet loss is seen when NIC is connected back to back to another NIC.

Root cause is under investigation.

krjoshi commented 7 years ago

Symptoms:

Packets being dropped on RX side by VFd
Problem does not happen if other side is a back to back connection to another VFd process.
Problem does not happen with ixgbe driver.

Suspect MTU > 1500 bug as the root cause. Will test with MTU patch to see if packet loss is resolved.

krjoshi commented 7 years ago

Issue was diagnosed to be the result of the NIC responding to flow control messages from the switch.

Hard setting flow control off irrespective of switch setting improved packet loss substantially. Testing underway to verify if this solves the problem entirely.