Chelsio Communications Chelsio T4, Installation And User Manual

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Chapter I. Chelsio Unified Wire
Chelsio T5/T4 Unified Wire for Linux
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6. Performance Tuning
In order to auto tune the system for best performance, Chelsio recommends:

Disabling virtualization, c-state technology, VT-d, Intel I/O AT and SR-IOV in the BIOS
settings

Installing the adapter into a PCIe Gen3 x8/x16 slot.

Installing the tools which will copy t4_perftune.sh script to /sbin directory. Run the script
to map the adapter queues to different CPUs:
[root@host~]# t4_perftune.sh
Also, follow the steps mentioned below to lower your latency:
i. Disable SELinux
ii. Run the following script to disable few services.
[root@host~]# t4_latencytune.sh <interface>
iii. Set sysctl param net.ipv4.tcp_low_latency to 1
[root@host~]# sysctl -w net.ipv4.tcp_low_latency=1
To optimize your system for different protocols, please refer to their respective chapters.