On Thu, 10 Sep 2020 17:39:48 +0000, ray carter wrote:

> On Thu, 10 Sep 2020 12:47:40 +0100, 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.
>>
>> 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?
>
> I believe there is a real time os in development somewhere - have you
> looked for it? You might also check out arch and gentoo,or maybe risc
> os.

Microware OS-9 could be a starter, since it was designed from the ground
up as an RTOS.

It was originally released for the 6809 and quickly ported to the 680x0
where v2.4 was super-stable. Since then seems to have been ported to ARM
and picked up TCP/IP support, but I can't determine which ARM
architectures it has been ported to. Its website doesn't mention
RaspberryPis either. Pity: I used it for years on a 68020 and liked it a
lot.


--
Martin    | martin at
Gregorie  | gregorie dot org

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