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fix(linux): Update ICSSM FAQ on how to address low performance #522

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sadik-smd merged 1 commit into from
Nov 25, 2025
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fix(linux): Update ICSSM FAQ on how to address low performance #522

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17 changes: 17 additions & 0 deletions source/linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU-ICSS_Ethernet.rst
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Expand Up @@ -687,6 +687,23 @@ Turning flooding on/off on switch ports
.. rubric:: Frequently Asked Questions
:name: frequently-asked-questions

.. ifconfig:: CONFIG_part_variant in ('AM335X','AM437X')

.. rubric:: Low TCP performance throughput on PRU-ICSS Ethernet ports, how to improve?
:name: low-tcp-performance-throughput-how-to-improve

The CPUFreq governer should be set to performance for use-cases requiring high throughput.
Hence to attain maximum throughput, force the CPU to run at its maximum frequency and
prevent any frequency scaling using the following command:

.. code-block:: console
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
This forces the CPU to run at its maximum frequency and should improve the TCP throughput.
On AM335x, TCP throughput with 1500 byte (default) packet size, before and after running the
command are 26Mbps and 76Mbps respectively.

.. rubric:: Are the HSR or PRP protocols supported?
:name: are-the-hsr-or-prp-protocols-supported

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