Chelsio Communications Terminator 6, Installation And User Manual, Page: 43 / 432

Chapter I. Chelsio Unified Wire
Chelsio Unified Wire for Linux 43
Performance Tuning
The following section lists the steps to tune the system for optimal performance.
5.1. Generic
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Install the adapter into a PCIe Gen3 x8/x16 slot. Ensure that T6 100G adapters are placed in
x16 slots and not in x8_in_x16 slots.
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BIOS settings:
i. Disable virtualization, c-state technology, VT-d, Intel I/O AT and SR-IOV.
ii. CPU Power setting to Performance.
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Add intel_pstate=disable processor.max_cstate=1 intel_idle.max_cstate=0 to the kernel
command line to prevent the system from entering power-saving/idle states and avoid CPU
frequency changes.
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Turn off irqbalance
[root@host~]# /etc/init.d/irqbalance stop
On RHEL7.X platforms, use the below command:
[root@host~]# systemctl stop irqbalance.service
5.2. Throughput
In addition to the generic settings, set the below tuned-adm profile for RHEL platforms.
[root@host~]# tuned-adm profile network-throughput
5.3. Latency
In addition to the generic settings,
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Disable Hyperthreading in BIOS.
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Add idle=poll to the kernel command line.
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Disable SELinux.
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Set the below tuned-adm profile for RHEL7 platforms.
[root@host~]# tuned-adm profile network-latency