Software/Driver Configuration; Enabling Tcp Offload; Enabling Busy Waiting - Chelsio Communications Terminator Series Installation And User Manual

Chapter II. Network (NIC/TOE)

Software/Driver Configuration

4.1.

Enabling TCP Offload

Load the offload drivers and bring up the Chelsio interface.
[root@host~]# modprobe t4_tom
[root@host~]# ifconfig ethX <IP> up
All TCP traffic will be offloaded over the Chelsio interface now. To see the number of
connections offloaded, run the following command:
[root@host~]# cat /sys/kernel/debug/cxgb4/<bus-id>/tids
Where,
TID is the number of offload connections.
STID is the number of offload servers.
T6 25G SO adapters support limited number of offload connections (256 IPv4/128 IPv6). Here is
a sample output:
4.2.

Enabling Busy waiting

Busy waiting/polling is a technique where a process repeatedly checks to see if an event has
occurred, by spinning in a tight loop. By making use of similar technique, Linux kernel provides
Chelsio Unified Wire for Linux 56