warthog618/gpio

Excellent, thank you.

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skl commented

Just dropping by to say thank you for an excellent library. Source code is clear and idiomatic from a targetted Go/Linux/RPI system perspective. The README gives a nice introduction and justification.

I refactored my code from @hybridgroup's Gobot GPIO ButtonDriver to use your library instead and saw a significant reduction in resource consumption.

Below stats from top are enough to see the huge difference during a non-eventful watch period.

Before:

RES    SHR  S  %CPU  %MEM
7432   2416 S   4.7   1.7

After:

RES    SHR  S  %CPU  %MEM
2404   1964 S   0.0   0.5

I actually had to hunt for the pid because the process no longer shows up in top when ordered by CPU usage. Nice work!

warthog618 commented

I'm assuming Gobot uses a polled approach, so the benefit you are seeing is due to the change to an interrupt driven approach - it isn't as though my library is doing anything magical.

Glad that the library is working for you, but as one of the kernel interfaces it uses is deprecated you might want to consider switching to my gpiod (github.com/warthog618/gpiod) library that uses the latest kernel GPIO character device interface. I'd be interested to know what you think of its API compared to this one.

Cheers,
Kent.

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