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giampaolo avatar giampaolo commented on June 27, 2024

You should try to see if sensors command has the same behavior (I suspect yes).

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f18m avatar f18m commented on June 27, 2024

Thanks @giampaolo for very fast answer.
I have been running 'watch -n1 sensors' just now and indeed I see some "crazy" sample appearing every now and then.
I guess that sounds like a kernel(module) bug?

Would it make sense to build some 'moving average' filtering on psutil side to handle such buggy sensors?

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giampaolo avatar giampaolo commented on June 27, 2024

Nope. We should always return what the kernel gives us.

To be honest, there is one exception in psutil: net_io_counters() and disk_io_counters(). On long running systems the kernel may wrap the returned numbers and restart from 0, in which case psutil will adjust them so they never go backwards:

psutil/psutil/__init__.py

Lines 2072 to 2075 in 3c518a3

If *nowrap* is True it detects and adjust the numbers which overflow
and wrap (restart from 0) and add "old value" to "new value" so that
the returned numbers will always be increasing or remain the same,
but never decrease.

Calculating a moving average is something different though.

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