Re: [9fans] Plan9 multi-core support

[Steve Simon <steve@quintile.net>]

there was a vax compiler and i think a vax kenfs implementation, i don’t know if there was a vax cpu/auth kernel. quite possibly not.

currently i can only find my own post on tuhs confirming the vax was a dead end. but i am sure jmk told me he found a vax compiler binary in the labs dump.

i think vaxes where becoming rather passé by the time plan9 was born.

-Steve


> On 28 Aug 2023, at 7:21 pm, Kurt H Maier via 9fans <9fans@9fans.net> wrote:
> 
> On Mon, Aug 28, 2023 at 12:32:55PM +0000, G B via 9fans wrote:
>> Windows and Linux began on single-core single processor machines. Multiprocessor had been around for some time--IBM's System 360 began using multi-processors in 1968--but not for x86. Plan 9 first edition came out in 1992, at a time when multicore didn't exist, and multicore was released with IBM's Power 4 in 2001. 
>> I can see why someone would ask if Plan 9 supports multicore. Plan 9 3rd edition was released in 2000 and 4th edition was released in 2002. In each case, going from single core-single processor to multiprocessor and then from multiprocessor to multicore would require changes in the operating system to recognize the extra processors and then the cores.
> 
> Symmetric multiprocessing was available in 1992, even on x86
> machines.  Multics, tops-10, and various unixes all supported it by then.
> Once you have shared-memory SMP there's little difference between
> multiprocessor and multicore.  Plan 9's implementation is imo cleaner
> than most of what came before, but by 1992 there was a lot of
> multiprocessing going on in the world.
> 
> khm

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