EF_RXQ_SIZE - EF_RXQ_SIZE - UG1586

Onload User Guide (UG1586)

Document ID
UG1586
Release Date
2026-06-08
Revision
1.5 English
Name
rxq_size
Default
-1
Minimum
-1
Maximum
32768
Scope
per-stack

Set the size of the receive descriptor ring. Must be a power of two. Valid values are architecture dependent. For the EF10 architecture, 512, 1024, 2048, or 4096.

A larger ring size can absorb larger packet bursts without drops, but might reduce efficiency because the working set size is increased.

The default value is -1, which selects the recommended value on a per-architecture basis. The actual size used is reported by onload_stackdump netif in the rxq: section for each interface.

If the value is lower than is supported by the hardware, it is rounded up. Set EF_LOG to include more_config_warnings to log if this occurs.