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Sdk11.1 cyclictest #352

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7555401
perf(linux): AM62AX: Update PREEMPT_RT perf numbers for 11.1
bryanbrattlof Jul 9, 2025
648f5c7
perf(linux): AM62LX: Update PREEMPT_RT perf numbers for 11.1
bryanbrattlof Jul 9, 2025
14f2566
perf(linux): AM62PX: Update PREEMPT_RT perf numbers for 11.1
bryanbrattlof Jul 9, 2025
4e2b118
perf(linux): AM62X: Update PREEMPT_RT perf numbers for 11.1
bryanbrattlof Jul 9, 2025
f8839d9
perf(linux): AM64X: Update PREEMPT_RT perf numbers for 11.1
bryanbrattlof Jul 9, 2025
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6 changes: 3 additions & 3 deletions source/devices/AM62AX/linux/RT_Linux_Performance_Guide.rst
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At line no. 2,

RT-linux 11.01 Performance Guide

Original file line number Diff line number Diff line change
Expand Up @@ -57,14 +57,14 @@
stress-ng --cpu-method=all -c 4 &
cyclictest -m -Sp80 -D6h -h400 -i200 -M -q

The latencies where observed with this SDK are summarized below:
The latencies observed with the default yocto SDK are summarized below:

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.

Raw Output:
{"message": "[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.", "location": {"path": "source/devices/AM62AX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 60, "column": 66}}}, "severity": "INFO"}

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.

Raw Output:
{"message": "[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.", "location": {"path": "source/devices/AM62AX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 60, "column": 51}}}, "severity": "INFO"}
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Rewording as
"The latencies observed with the default yocto SDK is in the following table:" could fix the vale comment. Check by updating if this fixes across the devices.


.. csv-table::
:header: "Latencies","CPU 0","CPU 1","CPU 2","CPU 3"

"Minimum (us)","5","5","5","5"
"Average (us)","5","6","6","5"
"Maximum (us)","68","31","34","28"
"Average (us)","6","6","6","6"
"Maximum (us)","45","30","39","64"
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@praneethbajjuri AM62A coreSDK RC for 11.1 would still be +2 weeks from now.
Most likely nothing in vendor kernel should impact the RT Latency numbers but any chances of
stable update from branch linux-6.12.y of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux into ti-linux-6.12.y-cicd ?

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@cshilwant this numbers are ok for now. Will re-do AM62A and AM62L RT test closer to final week of release again and update the numbers if there is a delta.

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Okay, ACK from my end once #352 (comment) is fixed

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@bryanbrattlof @praneethbajjuri our target for 62A is to keep below 50us. 64us seems a regression ?


.. image:: img/rt-cpu-method-all-latency-histogram.png

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6 changes: 3 additions & 3 deletions source/devices/AM62LX/linux/RT_Linux_Performance_Guide.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -56,13 +56,13 @@
stress-ng --cpu-method=all -c 4 &
cyclictest -m -Sp80 -D6h -h400 -i200 -M -q

The latencies observed with this SDK are summarized below:
The latencies observed with the default yocto SDK are summarized below:

Check warning on line 59 in source/devices/AM62LX/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.

Raw Output:
{"message": "[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.", "location": {"path": "source/devices/AM62LX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 59, "column": 66}}}, "severity": "INFO"}

Check warning on line 59 in source/devices/AM62LX/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.

Raw Output:
{"message": "[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.", "location": {"path": "source/devices/AM62LX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 59, "column": 51}}}, "severity": "INFO"}

.. csv-table::
:header: "Latencies","CPU 0","CPU 1"

"Minimum (us)","5","5"
"Average (us)","6","8"
"Maximum (us)","47","53"
"Average (us)","7","7"
"Maximum (us)","61","60"

.. image:: img/rt-cpu-method-all-latency-histogram.png
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6 changes: 3 additions & 3 deletions source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -57,13 +57,13 @@
stress-ng --cpu-method=all -c 4 &
cyclictest -m -Sp80 -D6h -h400 -i200 -M -q

The latencies observed with this SDK are summarized below:
The latencies observed with the default yocto SDK are summarized below:

Check warning on line 60 in source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.

Raw Output:
{"message": "[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.", "location": {"path": "source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 60, "column": 66}}}, "severity": "INFO"}

Check warning on line 60 in source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.

Raw Output:
{"message": "[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.", "location": {"path": "source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 60, "column": 51}}}, "severity": "INFO"}

.. csv-table::
:header: "Latencies","CPU 0","CPU 1","CPU 2","CPU 3"

"Minimum (usec)","5","5","5","5"
"Average (usec)","6","6","5","6"
"Maximum (usec)","30","33","31","35"
"Average (usec)","6","6","6","6"

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GitHub Actions / vale 

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

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'usec'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 66, "column": 14}}}, "severity": "WARNING"}
"Maximum (usec)","34","74","35","39"

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GitHub Actions / vale 

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

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'usec'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM62PX/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 67, "column": 14}}}, "severity": "WARNING"}
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74us needs to be investiagated. This is more than x2 the original number

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yeah these numbers are all over the place for all platforms. I've opened a ticket internally to follow up on this

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this usec vale warning can be ignored.


.. image:: img/rt-cpu-method-all-latency-histogram.png
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7 changes: 4 additions & 3 deletions source/devices/AM62X/linux/RT_Linux_Performance_Guide.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -61,13 +61,14 @@
stress-ng --cpu-method=all -c 4 &
cyclictest -m -Sp80 -D6h -h400 -i200 -M -q

The latencies observed with this SDK are summarized below:
The latencies observed with the default yocto SDK image on
https://www.ti.com/tool/SK-AM62B-P1 are summarized below:

Check warning on line 65 in source/devices/AM62X/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.

Raw Output:
{"message": "[RedHat.TermsSuggestions] Depending on the context, consider using 'after', 'later', or 'following' rather than 'below'.", "location": {"path": "source/devices/AM62X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 65, "column": 52}}}, "severity": "INFO"}

Check warning on line 65 in source/devices/AM62X/linux/RT_Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.

Raw Output:
{"message": "[RedHat.PassiveVoice] 'are summarized' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.", "location": {"path": "source/devices/AM62X/linux/RT_Linux_Performance_Guide.rst", "range": {"start": {"line": 65, "column": 37}}}, "severity": "INFO"}

.. csv-table::
:header: "Latencies","CPU 0","CPU 1","CPU 2","CPU 3"

"Minimum (usec)","5","5","4","4"
"Average (usec)","7","5","6","6"
"Maximum (usec)","66","41","73","70"
"Average (usec)","6","5","6","6"
"Maximum (usec)","75","77","62","73"

.. image:: img/rt-cpu-method-all-latency-histogram.png
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4 changes: 2 additions & 2 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 @@ -64,8 +64,8 @@ The latencies observed with this DK are summarized below:
:header: "Latencies","CPU 0","CPU 1"

"Minimum (usec)","6","6"
"Average (usec)","8","8"
"Maximum (usec)","77","105"
"Average (usec)","10","8"
"Maximum (usec)","85","64"

.. image:: img/rt-cpu-method-all-latency-histogram.png

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