Other Considerations - Xilinx Alveo X3522 User Manual

Services
It might be beneficial to disable certain Linux services.
CPU Speed Service
Most Linux distributions will have the cpuspeed service running by default. This service
controls the CPU clock speed dynamically according to current processing demand. For latency
sensitive applications, where the application switches between having packets to process and
having periods of idle time waiting to receive a packet, dynamic clock speed control might
increase packet latency. It is recommended to disable the cpuspeed service if minimum latency is
the main consideration.
The service can be disabled temporarily:
/sbin/service cpuspeed stop
The service can be disabled across reboots:
/sbin/chkconfig –level 12345 cpuspeed off
CPU Power Service
On RHEL7 systems, cpuspeed is replaced with cpupower. It is recommended to disable the
cpupower service if minimum latency is the main consideration. The service is controlled via
systemctl:
systemctl stop cpupower
systemctl disable cpupower
Tuned Service
On RHEL7 systems, it might be beneficial to disable the tuned service if minimum latency is the
main consideration. Users are advised to experiment. The service is controlled via systemctl:
systemctl stop tuned
systemctl disable tuned

Other Considerations

This section describes some other considerations.
UG1523 (v1.0) October 18, 2022
Alveo X3522 User Guide
Chapter 5: Tuning
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