try_lock increase wait time from 0 to 1 ms

[ilario]

In the initial code a loop was present inside I2CDevice.__enter__ and I2CDevice.__probe_for_device that was then modified in #91.

I have the issue described in adafruit/Adafruit_CircuitPython_TCA9548A#52: the CPU goes to 100% when the I2C board is not reachable.

Increasing the waiting time from 0 ms to 1 ms decreases the CPU usage of a A64-OLinuXino from 100% to 2%, increasing the battery life during power cuts.

Maybe there is a smarter solution than just increasing the sleep time?

A similar change has also been proposed for the TCA9548A code in adafruit/Adafruit_CircuitPython_TCA9548A#53

[tannewt]

Please don't make this change. Instead, the I2C driver for your SBC should be smarter.

[ilario]

Please don't make this change.

Ok, closing.

Instead, the I2C driver for your SBC should be smarter.

To me it seems that my SBC (an A64-OLinuXino) is irrelevant here. Can anyone try with another hardware? The while-sleep(0) loop seems the culprit to me.
Looking where the try_lock is defined I got until this, which does not look hardware-related to me:
https://github.com/adafruit/Adafruit_Blinka/blob/1c4358371c4945d08fb208fa83e425f5b1af9d45/src/adafruit_blinka/__init__.py#L64-L69