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docs/library/esp32: Update ESP32 idf_heap_info docs to match behaviour.

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Signed-off-by: Angus Gratton <angus@redyak.com.au>
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Angus Gratton 2023-09-05 11:06:23 +10:00 committed by Damien George
parent 3e8aed9fcc
commit 26160e8ed5
1 changed files with 15 additions and 9 deletions
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24
docs/library/esp32.rst
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@ -56,15 +56,6 @@ Functions
two most useful ones are predefined as `esp32.HEAP_DATA` for data heap regions and
`esp32.HEAP_EXEC` for executable regions as used by the native code emitter.
Free IDF heap memory in the `esp32.HEAP_DATA` region is available to be
automatically added to the MicroPython heap to prevent a MicroPython
allocation from failing. However, the information returned here is otherwise
*not* useful to troubleshoot Python allocation failures, use
`micropython.mem_info()` instead. The "max new split" value in
`micropython.mem_info()` output corresponds to the largest free block of
ESP-IDF heap that could be automatically added on demand to the MicroPython
heap.
The return value is a list of 4-tuples, where each 4-tuple corresponds to one heap
and contains: the total bytes, the free bytes, the largest free block, and
the minimum free seen over time.
@ -75,6 +66,21 @@ Functions
[(240, 0, 0, 0), (7288, 0, 0, 0), (16648, 4, 4, 4), (79912, 35712, 35512, 35108),
(15072, 15036, 15036, 15036), (113840, 0, 0, 0)]
.. note:: Free IDF heap memory in the `esp32.HEAP_DATA` region is available
to be automatically added to the MicroPython heap to prevent a
MicroPython allocation from failing. However, the information returned
here is otherwise *not* useful to troubleshoot Python allocation
failures. :func:`micropython.mem_info()` and :func:`gc.mem_free()` should
be used instead:
The "max new split" value in :func:`micropython.mem_info()` output
corresponds to the largest free block of ESP-IDF heap that could be
automatically added on demand to the MicroPython heap.
The result of :func:`gc.mem_free()` is the total of the current "free"
and "max new split" values printed by :func:`micropython.mem_info()`.
Flash partitions
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