Poor TCP transmit throughput with Intel I219-LM/I219-V under RHEL8.5

Solution In Progress - Updated -

Issue

  • Poor TCP transmit throughput with Intel I219-LM/I219-V network interface
  • I219-LM/I219-V e1000e adpater performance halves
  • Slower than expected transmit rate on RHEL 8.5 and later
  • iperf3 on system with around 700 mbit/s upload

Environment

  • Red Hat Enterprise Linux 8.5 and later
  • Intel I219-LM/I219-V NIC using e1000e driver. PCI IDs:
    • I219LM - 0x8086-0x15B7
    • I219-V - 0x8086-0x15B8
  • Transmission Control Protocol (TCP) network traffic
  • TCP Segmentation Offloading (TSO) enabled on NIC

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content