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praneethbajjuri merged 2 commits into from
Jul 21, 2025
Merged

Add LPM latency measurements and refactor LPM power tables #399

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dfa0457
refactor(linux): AM62*: Add LPM subheading and name tables
kwillis01 Jul 18, 2025
74a3fdf
feat(linux): AM62*: Introduce LPM resume latency performance
kwillis01 Jul 18, 2025
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34 changes: 29 additions & 5 deletions source/devices/AM62AX/linux/Linux_Performance_Guide.rst
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Expand Up @@ -702,9 +702,10 @@
Low Power Performance
-------------------------

Table: **Deep sleep**
Power Performance

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GitHub Actions / vale 

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

Raw Output:
{"message": "[RedHat.Headings] Use sentence-style capitalization in 'Power Performance'.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 705, "column": 1}}}, "severity": "INFO"}
^^^^^^^^^^^^^^^^^

.. csv-table::
.. csv-table:: Deep Sleep Power Performance
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core","0.85","19.16"
Expand All @@ -715,9 +716,7 @@
"vdd_lpddr4","1.10","3.59"
"Total"," ","42.96"

Table: **MCU only**

.. csv-table::
.. csv-table:: MCU Only Power Performance

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.Definitions] Define acronyms and abbreviations (such as 'MCU') on first occurrence if they're likely to be unfamiliar.

Raw Output:
{"message": "[RedHat.Definitions] Define acronyms and abbreviations (such as 'MCU') on first occurrence if they're likely to be unfamiliar.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 719, "column": 16}}}, "severity": "INFO"}
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core","0.85","199.73"
Expand All @@ -736,3 +735,28 @@
The measurements shown are from an AM62Ax rev E3. Results may vary based off of the board revision being used.

Further optimizations are possible for these low power modes. Please refer to the AM62x Power Consumption App Note (https://www.ti.com/lit/pdf/spradg1)

Resume Latency Performance

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[vale] reported by reviewdog 🐶
[RedHat.Headings] Use sentence-style capitalization in 'Resume Latency Performance'.

Raw Output:
{"message": "[RedHat.Headings] Use sentence-style capitalization in 'Resume Latency Performance'.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 739, "column": 1}}}, "severity": "INFO"}
^^^^^^^^^^^^^^^^^^^^^^^^^^

.. csv-table:: LPM Resume Latency Performance

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[vale] reported by reviewdog 🐶
[RedHat.Definitions] Define acronyms and abbreviations (such as 'LPM') on first occurrence if they're likely to be unfamiliar.

Raw Output:
{"message": "[RedHat.Definitions] Define acronyms and abbreviations (such as 'LPM') on first occurrence if they're likely to be unfamiliar.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 742, "column": 16}}}, "severity": "INFO"}
:header: "Low Power Mode","Total Resume Latency (ms)"

"Deep Sleep", "146.45"
"MCU Only", "110.40"

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.Definitions] Define acronyms and abbreviations (such as 'MCU') on first occurrence if they're likely to be unfamiliar.

Raw Output:
{"message": "[RedHat.Definitions] Define acronyms and abbreviations (such as 'MCU') on first occurrence if they're likely to be unfamiliar.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 746, "column": 5}}}, "severity": "INFO"}

The performance numbers are measured without the Linux printk logs. To remove the

Check warning on line 748 in source/devices/AM62AX/linux/Linux_Performance_Guide.rst

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

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'printk'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 748, "column": 56}}}, "severity": "WARNING"}

Check warning on line 748 in source/devices/AM62AX/linux/Linux_Performance_Guide.rst

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GitHub Actions / vale 

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

Raw Output:
{"message": "[RedHat.PassiveVoice] 'are measured' is passive voice. In general, use active voice. Consult the style guide for acceptable use of passive voice.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 748, "column": 25}}}, "severity": "INFO"}
Linux printk logs, run the following commands in the terminal:

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

Raw Output:
{"message": "[RedHat.Spelling] Verify the word 'printk'. It is not in the American English spelling dictionary used by Vale.", "location": {"path": "source/devices/AM62AX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 749, "column": 7}}}, "severity": "WARNING"}

.. code:: console

# Detach kernel serial console
consoles=$(find /sys/bus/platform/devices/*.serial/ -name console)
for console in ${consoles}; do
echo -n N > ${console}
done


.. note::

The measurements shown are from using the default SDK with no extra optimizations.
11 changes: 5 additions & 6 deletions source/devices/AM62LX/linux/Linux_Performance_Guide.rst
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Expand Up @@ -806,12 +806,13 @@
Low Power Performance
---------------------

Power Performance

Check warning on line 809 in source/devices/AM62LX/linux/Linux_Performance_Guide.rst

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

Raw Output:
{"message": "[RedHat.Headings] Use sentence-style capitalization in 'Power Performance'.", "location": {"path": "source/devices/AM62LX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 809, "column": 1}}}, "severity": "INFO"}
^^^^^^^^^^^^^^^^^

These are power measurements taken while the device is in various low power modes like
Deep Sleep and RTC Only + DDR.

Table: **Deep sleep**

.. csv-table::
.. csv-table:: Deep Sleep Power Performance
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core", "0.75", "4.88"
Expand All @@ -823,9 +824,7 @@
"vdd_rtc_1v8", "1.80", "0.01"
"Total"," ","~11.04"

Table: **RTC Only + DDR**

.. csv-table::
.. csv-table:: RTC Only + DDR Power Performance

Check warning on line 827 in source/devices/AM62LX/linux/Linux_Performance_Guide.rst

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GitHub Actions / vale 

[vale] reported by reviewdog 🐶
[RedHat.Definitions] Define acronyms and abbreviations (such as 'RTC') on first occurrence if they're likely to be unfamiliar.

Raw Output:
{"message": "[RedHat.Definitions] Define acronyms and abbreviations (such as 'RTC') on first occurrence if they're likely to be unfamiliar.", "location": {"path": "source/devices/AM62LX/linux/Linux_Performance_Guide.rst", "range": {"start": {"line": 827, "column": 16}}}, "severity": "INFO"}
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core", "0.00", "0.00"
Expand Down
35 changes: 30 additions & 5 deletions source/devices/AM62PX/linux/Linux_Performance_Guide.rst
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Expand Up @@ -970,9 +970,10 @@ Listed for each algorithm are the code snippets used to run each
Low Power Performance
---------------------

Table: **Deep sleep**
Power Performance
^^^^^^^^^^^^^^^^^

.. csv-table::
.. csv-table:: Deep Sleep Power Performance
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core","0.85","8.95"
Expand All @@ -983,9 +984,7 @@ Table: **Deep sleep**
"vdd_lpddr4","1.10","0.46"
"Total"," ","88.66"

Table: **MCU only**

.. csv-table::
.. csv-table:: MCU Only Power Performance
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core","0.85","211.34"
Expand All @@ -1009,3 +1008,29 @@ Partial I/O Data
The measurements shown are from an AM62Px SK rev E1-1. Results may vary based off of the board revision being used.

Further optimizations are possible for these low power modes. Please refer to the AM62x Power Consumption App Note (https://www.ti.com/lit/pdf/spradg1)

Resume Latency Performance
^^^^^^^^^^^^^^^^^^^^^^^^^^

.. csv-table:: LPM Resume Latency Performance
:header: "Low Power Mode","Total Resume Latency (ms)"

"I/O Only + DDR", "715.09"
"Deep Sleep", "143.33"
"MCU Only", "94.17"

The performance numbers are measured without the Linux printk logs. To remove the
Linux printk logs, run the following commands in the terminal:

.. code:: console

# Detach kernel serial console
consoles=$(find /sys/bus/platform/devices/*.serial/ -name console)
for console in ${consoles}; do
echo -n N > ${console}
done


.. note::

The measurements shown are from using the default SDK with no extra optimizations.
34 changes: 29 additions & 5 deletions source/devices/AM62X/linux/Linux_Performance_Guide.rst
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Expand Up @@ -1126,9 +1126,10 @@ IPSec Software Performance
Low Power Performance
-------------------------

Table: **Deep sleep**
Power Performance
^^^^^^^^^^^^^^^^^

.. csv-table::
.. csv-table:: Deep Sleep Power Performance
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core","0.85","8.53"
Expand All @@ -1139,9 +1140,7 @@ Table: **Deep sleep**
"vdd_ddr4","1.10","7.50"
"Total"," ","24.37"

Table: **MCU only**

.. csv-table::
.. csv-table:: MCU Only Power Performance
:header: "Rail name","Rail voltage(V)","Power (mW)"

"vdd_core","0.85","109.46"
Expand All @@ -1160,3 +1159,28 @@ Partial I/O Data
The measurements shown are from an SK-AM62B-P1. Results may vary based off of the board variant being used.

Further optimizations are possible for these low power modes. Please refer to the AM62x Power Consumption App Note (https://www.ti.com/lit/pdf/spradg1)

Resume Latency Performance
^^^^^^^^^^^^^^^^^^^^^^^^^^

.. csv-table:: LPM Resume Latency Performance
:header: "Low Power Mode","Total Resume Latency (ms)"

"Deep Sleep", "137.03"
"MCU Only", "86.12"

The performance numbers are measured without the Linux printk logs. To remove the
Linux printk logs, run the following commands in the terminal:

.. code:: console

# Detach kernel serial console
consoles=$(find /sys/bus/platform/devices/*.serial/ -name console)
for console in ${consoles}; do
echo -n N > ${console}
done


.. note::

The measurements shown are from using the default SDK with no extra optimizations.
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