https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203445
Bug ID: 203445
Summary: Receive side scaling (RSS) for more than 16 queues not
working in "ixl" driver
Product: Base System
Version: 11.0-CURRENT
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Issue -
Receive side scaling (RSS) for more than 16 queues not working in "ixl" driver.
Version:
The FreeBSD driver version is 1.4.1
Description:
My system has 20 CPU cores. The packet-processing application uses NIC RSS
feature to filter packets to dedicated receive queues for each core.
NIC is able to do RSS properly for Queue-0 to Queue-15, and packets reach the
right receive queues.
But not a single packet reach Queue-16/17/18/19.
Instead Packets for Queue-16/17/18/18 reach Queue-0/1/2/3
Possibly some RSS specific register settings missing in the drivers that
restricts NIC from using more than 16 receive queues
Linux driver doesn't seem to exhibit this behavior.
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