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feat(linux): AM64X: Add remote proc performance numbers for 11.1 release #396

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cshilwant merged 1 commit into from
Jul 21, 2025
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feat(linux): AM64X: Add remote proc performance numbers for 11.1 release #396

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39 changes: 39 additions & 0 deletions source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -757,3 +757,42 @@


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RP Message Inter-Processor Communication (IPC) Latency

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.Headings] Use sentence-style capitalization in 'RP Message Inter-Processor Communication (IPC) Latency'.

Raw Output:
{"message": "[RedHat.Headings] Use sentence-style capitalization in 'RP Message Inter-Processor Communication (IPC) Latency'.", "location": {"path": "source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 761, "column": 1}}}, "severity": "INFO"}
------------------------------------------------------

RP Message latency Performance

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[vale] reported by reviewdog 🐶
[RedHat.Headings] Use sentence-style capitalization in 'RP Message latency Performance'.

Raw Output:
{"message": "[RedHat.Headings] Use sentence-style capitalization in 'RP Message latency Performance'.", "location": {"path": "source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 764, "column": 1}}}, "severity": "INFO"}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

RP Message latency is the delay measured from sending a round trip echo message from
a Linux application to a remote processor and back. The following measurements use
a RP message length of 1 byte and 490 bytes for comparison.

The Linux user space application `rpmsg_char_benchmark <https://git.ti.com/cgit/rpmsg/ti-rpmsg-char/>`__ captures these latency values.

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[vale] reported by reviewdog 🐶
[RedHat.Spelling] Verify the word 'rpmsg_char_benchmark'. It is not in the American English spelling dictionary used by Vale.

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'rpmsg_char_benchmark'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 771, "column": 35}}}, "severity": "WARNING"}

Test commands used for running IPC latency tests:

.. code:: console

rpmsg_char_benchmark -r 2 -n 100000 -m 1 & chrt -f -p 80 $!

Latencies reported:


.. csv-table::
:header: "Remote Processor","Message Size (in bytes)","Average round trip (usecs)","Max round trip (usecs)"

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.Spelling] Verify the word 'usecs'. It is not in the American English spelling dictionary used by Vale.

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'usecs'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 783, "column": 104}}}, "severity": "WARNING"}

Check warning on line 783 in source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.Spelling] Verify the word 'usecs'. It is not in the American English spelling dictionary used by Vale.

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'usecs'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM64X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 783, "column": 79}}}, "severity": "WARNING"}

"R5F0_0","1","32","205"
"R5F0_0","490","162","272"
"M4F","1","41","186"
"M4F","490","301","446"

.. image:: img/R5_0_0_m1_ipc_latency.png

.. image:: img/R5_0_0_m490_ipc_latency.png

.. image:: img/m4_0_m1_ipc_latency.png

.. image:: img/m4_0_m490_ipc_latency.png

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