On 11/09/2020 00:33, Computer Nerd Kev wrote:
> The Natural Philosopher  wrote:
>>
>> Looking at my 'I only do one thing' Pi running 94 different processes,
>> realistically how many of them do I need? And how could I get rid of them?
>>
>> I want to examine the pi as a reasonably real-time signal processing unit.
>>
>> I don't need disk access except to load the code. I may not need network
>> access. I don't need logging. I sure don't need systemd. I don't need a
>> gui.
>
> Try PiCore, it's as stripped-down as Linux gets for the Pi. Boots
> _way_ quicker than RPi OS on my Pi Zeros. No GUI, or systemd, no
> disk access (runs in RAM). if you want to disable hardware
> drivers, you can do that in config.txt (as you can in Raspberry Pi
> OS).
> http://www.tinycorelinux.net/ports.html

Ok I will take a look at that - may just be the 'right compromise'
Mmm. At first glance that is very near the mark. AND I can prototype on
an old PC *86 chassis...

>
>> I just want to run one high priority daemon and one lower priority
>> demon, with shared memory between them...is there something simpler than
>> Linux? More like e.g. DOS?
>
> There are various Bare-Metal environments, such as:
> https://github.com/rsta2/circle
> http://www.stevebate.net/chibios-rpi/GettingStarted.html
>


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“it should be clear by now to everyone that activist environmentalism
(or environmental activism) is becoming a general ideology about humans,
about their freedom, about the relationship between the individual and
the state, and about the manipulation of people under the guise of a
'noble' idea. It is not an honest pursuit of 'sustainable development,'
a matter of elementary environmental protection, or a search for
rational mechanisms designed to achieve a healthy environment. Yet
things do occur that make you shake your head and remind yourself that
you live neither in Joseph Stalin’s Communist era, nor in the Orwellian
utopia of 1984.”

Vaclav Klaus

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