EF_TCP_RCVBUF_MODE - EF_TCP_RCVBUF_MODE - UG1586

Onload User Guide (UG1586)

Document ID
UG1586
Release Date
2026-01-22
Revision
1.4 English
Name
tcp_rcvbuf_mode
Default
0
Minimum
0
Maximum
1
Scope
per-stack

This option controls how the RCVBUF is set for TCP Mode 0 (default) gives fixed size RCVBUF.

Mode 1 will enable automatic tuning of RCVBUF using Dynamic Right Sizing. If SO_RCVBUF is explicitly set by the application this value will be used. EF_TCP_SOCKBUF_MAX_FRACTION can be used to control the maximum size of the buffer for an individual socket.

The effect of EF_TCP_RCVBUF_STRICT is independent of this setting.