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* kof673
kof thought process .oO( is there a c compiler? yes. can i run it inside an emulator? yes. ✓✔✓✔✓✔ can be added as a target at least for building small utility programs, even if never have time to add platform-specific stuff )
<bslsk05>
www.recycledgoods.com: DEC Computer Museum Legacy 1980s Mainframe Computers Peripherals Assortment VAX
<zid`>
Oh, put me down for 10 of those listings then
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<geist>
VAAAAX
* geist
summons kazinsal
<klys>
ye ye
<geist>
also yay grats on netbsd on vax
<geist>
i haven't tried 10.1 since i was having problems with some of the higher numbered vaxen on real hardware before, but may be worth getting a SD card and seeing
<geist>
though i almost certainly don't have enough memory on this one (32MB) to really run it well
<geist>
but at least with simh you can call up to 512MB i think, depending on the model
<geist>
i think that was the architectural limit
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<nikolar>
geist: gotta get moar ram
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<zid`>
heat: good news, the string theory idiots are back, but with tensors
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<heat>
LETS GO
<heat>
STRING THEORY!!!!!!!!!!!!!!!!!
<gog>
i'm strung
<nikolar>
heat: how many dimensions are we up to nowadays
<zid`>
37
<heat>
yeah i just got my 37D classes
<heat>
glasses
<nikolar>
Neat
<GeDaMo>
Do you really need all 37 dimensions? That just seems extravagant :P
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* Ermine
gives gog a piece of cheese
* gog
is fascinated
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<Matt|home>
hello.
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<gog>
hi Matt|home
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<the_oz>
I don't get tensors
<the_oz>
how is a plane that lies perpendicular to vector v
<the_oz>
is it arbitrary?
<the_oz>
for instance, x axis is a surface? y axis and z axis?
<the_oz>
seems like saying "vector v1 and v2 transposed to v1 space" to me
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<nikolar>
Pretty sure tensors are just generalized matrices
<the_oz>
oh ok it's a 2 tuple
<the_oz>
Ahhh ok so it can scale and matrices is a good cognitive thingymabob
<nikolar>
Anyway
<nikolar>
KRNL
<the_oz>
kern
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<jimbzy>
Tensors are a lot of things. ;)
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<the_oz>
1 thing, not thing, A MEGAPLEX OF COLLECTIMNG GROUPS OF DATA
<the_oz>
data structures!
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<Ermine>
how did we come to tensors
<nikolar>
heat
<heat>
nikolar
<nikolar>
how's kerneling going
<heat>
ehhh not super well
<gog>
hi
<nikolar>
why not
<heat>
i'm been fucking around trying to get NPTL-style threading working, obviously it's a little complex and underspecified, as a detour i tried to get glibc 2.42 to compile for onyx, hitting problems on the way (i _think_ i need to enable ifunc support)
<nikolar>
is there a particular reason you're going for glibc
<heat>
i think long term it's kind of what i want instead of fucking around with musl, but also because they have a NPTL test suite and a bunch of tests
<nikolar>
interesting
<heat>
CLONE_THREAD has particular funny semantics. like on execve you need to switch pids and tids (and associated stats) between the current thread and the thread group leader
<heat>
and subthreads autoreap themselves, and you need to keep the thread group leader alive even if it has exited, if you still have running threads
<heat>
it is all a little funky
<nikolar>
so your approach to processes/threads is what linux is doing
<heat>
yes that's what im going for
<nikolar>
right
<heat>
i think we've discussed this before, but i quite like tids = pids from a usability POV
<nikolar>
and you get to reuse a bunch of stuff i imagine
<heat>
yep
<heat>
procfs, ptrace
<nikolar>
ye
<heat>
like ptrace traditionally takes pids but on linux it takes pids (in the linux sense, so tids), so you can just ptrace a single thread
<heat>
(this is actually used by libsanitizer)
<nikolar>
how does libsanitizer work on !linux
<heat>
also i was reading around the LKML and it seems that unofficially kill(2) actually supported/supports killing a single thread
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<heat>
idk, it is weird, it's part of a sanitizer "stop-the-world" routine
<heat>
i'm sure you can work something out with good old fork() + ptrace
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<nikolar>
eh i guess
<heat>
oh apparently netbsd implements a subset of fork
<heat>
s/fork/clone/
<bslsk05>
<heat*> oh apparently netbsd implements a subset of clone
<nikolar>
so clone makes threads on netbsd or something
<heat>
clone() makes the funky share-stuff processes, but they don't support CLONE_THREAD it seems
<nikolar>
ah right
<heat>
macOS and fuchsia seem to suspend threads directly thru mach magic/fuchsia stuff