Hi Tim,

Last week Instantiations presented at RIoT Developer month "Faster & More
Efficient: JITs for IoT", an experiment with VA Smalltalk and other
languages like Python, Java, etc... the context was how a JIT compiler can
also help you reduce energy consumption...which could be very important for
IoT. We did experiments on a Raspberry Pi, run some benchmarks and with
some hardware tool we were measuring the wattage.

You can see the whole presentation here: https://youtu.be/2xO0ohUNnug
And here the exact moment that shows the tool used:
https://youtu.be/2xO0ohUNnug?t=1818

This is the tool we used:
https://www.amazon.com/gp/product/B00O96NRE2/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I guess this is not exactly the same as detecting if it is throttling, but
maybe it helps.

Cheers,

On Fri, Oct 2, 2020 at 7:14 PM Eliot Miranda <eliot.miranda at gmail.com>
wrote:

> Hi Tim,
>
>
> > On Oct 2, 2020, at 1:52 PM, tim Rowledge <tim at rowledge.org> wrote:
> >
> > 
> >
> >> On 2020-10-01, at 3:19 PM, tim Rowledge <tim at rowledge.org> wrote:
> >>
> >> This is weird, annoying and driving me nuts. I'm trying everything I
> can think of to work out what is happening but just in case anybody else
> here is using Squeak on a Pi4 ...
> >
> > Power supply. Some slow fading of the output voltage lead to the Pi
> throttling , swap PSU and all seems well. Fetching 27,000 records / sec
> from a postgreSQL DB on a different machine :-)
>
> So two questions, a) is there a way from software or GUI to find out if
> the pi is throttling? b) is there a way from software or GUI to find out if
> the input voltage is dripping
>
> oh, and c) how did you debug this?
>
>
>
> _,,,^..^,,,_ (phone)
>
>

-- 
Mariano Martinez Peck
Email: marianopeck at gmail.com
Twitter: @MartinezPeck
LinkedIn: www.linkedin.com/in/mariano-martinez-peck
<https://www.linkedin.com/in/mariano-mart%C3%ADnez-peck/>
Blog: https://marianopeck.wordpress.com/
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