20 Jul
2020
20 Jul
'20
5:49 p.m.
On Mon, Jul 20, 2020 at 03:48:29AM -0600, Andrew Warkentin wrote:
A/UX runs Mac OS as a Unix process (its default GUI is
Mac OS although
it does also support a traditional X server), making it the opposite
of MachTen. It has considerable integration between Mac OS and Unix,
and supports "hybrid" programs (Unix programs that make Mac OS system
calls and Mac OS programs that make Unix system calls) (which I don't
think MachTen supports, but I'm not completely sure of that). It is
one of only two Unices that I'm aware of that runs another OS in a
process to provide its main GUI (the other is a much more recent Linux
distribution that runs AROS; I'm not counting things like running
Windows under Merge or VP/IX because those were usually used in
addition to X11).
This isn't quite the same but Victor Yodaiken wrote a real time kernel
that ran all of Linux as a user process. Super cool idea and it worked
great, he would demo it sampling the parallel port while Linux was running
some X11 perf thing, tarring up /usr and untarring on nfs://server/tmp/usr
and doing a ftp transfer. Basically beating the crap out of Linux as
hard as he could while running a real time sampler and it never missed.
Clem should pay attention, in my opinion, this is how you do Unix and
real time. Because Unix is time sharing and throughput, that is the
opposite of what real time is. Wedging real time into Unix is a mistake.
http://mcvoy.com/lm/papers/rtlmanifesto.pdf
--lm