<bslsk05>
jbangert/trapcc - Computing with traps (46 forks/1157 stargazers/BSD-3-Clause)
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<Fannie_Chmeller>
Greeting. My kernel is a LISP virtual machine kernel. The LISP code is emitted to native code which abeys the calling convention of the target. Because LISP has unparaleled safity there is nouse of separate page table or non-supervisor-mode for the user applications...
<Fannie_Chmeller>
Now I am designing however to allow the LISP code to take advantage of Virtual Memory... It should be nice to make LISP stacks demand-paged initially. Must to choose a way to proceed this. The currently there is one stack per process, which is used alike LISP, IRQs, exceptions. That cannot go on.
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<moon-child>
Fannie_Chmeller: demand paging has poor granularity. I would perhaps consider handling growth in software
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<moon-child>
Fannie_Chmeller: I would also suggest looking at what green threading systems, like go, (recently) hotspot, and the beam do
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<zid>
I'm in that classic opengl program stage of "why the fuck is everything black"
<sham1>
It is an interesting state to be in
<zid>
especially because my clear colour is red.
<sham1>
And since OpenGL doesn't really provide any debug tools, it makes this weird
<GeDaMo>
Is it possible that you have black triangle(s) covering the entire screen?
<zid>
nope, I just fixed the lack of glClear and the screen is all red
<zid>
I am rendering a square (verified with renderdoc) but it's not onscreen for some reason
<zid>
disabled culling and depth testing just in case
<zid>
vertex shader just does outpos = inpos * 0.4; to shrink it down a bit in case it's being clipped off, it's a square from -1,-1,0 to +1,+1,0 (so z=0) so should be onscreen no matter what
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<GeDaMo>
Are the triangles facing the wrong way?
<zid>
[10:31] <zid> disabled culling
<GeDaMo>
Ah, missed that
<zid>
it's also off by default anyway I think
<zid>
oh
<zid>
GOOD IDEA ME
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<zid>
gl_Position fixup isn't there in core profile, only compat, whoops
<zid>
sham1: Your turn, need a main.c for linux now
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<mcrod>
hi
<mcrod>
nvidia nsight is love
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<immibis>
nvidia is love, nvidia is life, now buy more stock
<sham1>
That's now how you spell AMD
<immibis>
(that's a joke because nvidia's stock is priced as if it's going to control the world with AI)
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<gog>
A I deez
<sham1>
Deez nutz?
<Ermine>
gog: may I pet you
<gog>
yes
* Ermine
pets gog
* gog
prr
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<bnchs>
hi gog
<sham1>
goggoggogggog
<gog>
hi
<zid>
sham are you finished yet
<sham1>
No. I'm at work
<bnchs>
gog: i need pets
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* gog
petpetpetpet bnchs
<gog>
zid
<gog>
diz
* bnchs
purrs
<zid>
gog: sham1 just agreed to do it when he gets home from work, confirm?
<sham1>
No
<zid>
I wasn't asking you
<sham1>
No
<gog>
not enough information
<zid>
gog hatesme
<sham1>
Thanks gog
<gog>
i don't hate you
<gog>
why would i hate you
<zid>
gog likes sham1 more than me
<gog>
it's not a competition, i love both of you equally
<bnchs>
does gog love me less than zid and sham1?
<gog>
no i love you more than them
<bnchs>
:o
<sham1>
Nice
<bnchs>
how?
<gog>
just how it is
<zid>
actions speak louder than words I am afraid
* bnchs
pets gog
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<zid>
The question is, can I use blender well enough to actually model anything more complex than a cube
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<mrvn>
Who has thought out the C++ fstreams? I open a file via fstream, I set exceptions and I get: terminate called after throwing an instance of 'std::__ios_failure' what(): basic_ios::clear: iostream error
<mrvn>
What I want is "File not found"
<mrvn>
isn't exception.what() supposed to be descriptive?
<GeDaMo>
Do they speak English in exception.what()? :|
<sham1>
Apparently not
<mrvn>
GeDaMo: are c++ exceptions localized?
<HeTo>
what() returns const char* and is noexcept, so in order to be more descriptive, std::ios_base::failure would have to capture the message from the error_code in its constructor
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<mrvn>
HeTo: you mean the one it already captures in .code()?
<GeDaMo>
Sorry, I know nothing about C++, I was riffing on a quote from Pulp Fiction :P
<HeTo>
mrvn: the message of that one, yes
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<HeTo>
mrvn: what() can't ask for the message because it's a std::string and asking for it is definitely not noexcept
<mrvn>
Or throw a system_exception or something and not a std::ios_base::failure
<mrvn>
HeTo: Now what is it? "what() returns const char*" or "it's a std::string"?
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<HeTo>
it seems that std::ios_base::failure is inherited from std::system_error already
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<mrvn>
HeTo: the point remains though that the error message is utterly useless and turning that into something usefull is just so much extra noise in the code.
<GeDaMo>
zid: have you tried OpenSCAD?
<zid>
nope
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<GeDaMo>
Create shapes with programming! :P
<zid>
oh wait, maybe I did then
<zid>
for about 20 minutes to check it out
<zid>
it was likv povray cad yea?
<mrvn>
zid: kind of. It's great for laser cutting and 3D Printing.
<GeDaMo>
Hmmm ... I'm not sure I ever used POVRay CAD
<zid>
no
<zid>
"povray" but cad
<GeDaMo>
OH, yes, similar
<zid>
yea that's the thing I used then
<zid>
someone was talking about it and I thought it looked neat
<zid>
I didn't have anything to make though
<mrvn>
not verry intuitive / interactive. You have to know what you want and type it in and can't just drag your mouse around to do magic.
<zid>
I did just figure out how to individually scale objects in a selection though, so I basically got done what I needed in blender
<zid>
(without it it was just scaling the like.. their distance from the origin)
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* mrvn
loves std::ostream s{"foo", s.in};
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<Jari-->
Is Nothing OS 2.0 good ?
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<sham1>
Hard to say
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<zid>
sham1: How bored are you?
<zid>
*someone* who shall remain nameless, needs to write me a blender export python script
<heat>
hi
<heat>
GeDaMo, they didnt get your reference and that makes me sad
<GeDaMo>
I meme but the memes fall flat :|
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<heat>
mjg, btw i forked will-it-scale, added some of the PRs and finally added a test for hwloc + support for no hwloc
<heat>
since upstream seems dead
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<mjg>
oh right
<mjg>
afair there is a bug somewhere in there which causes a hang
<mjg>
which is where any changes stopped
<mjg>
and they were already spotty beforehand
<mjg>
lmao 3 out of 5 PRs are mine
<heat>
bug where?
<mjg>
clean up machinery in main.c
<mjg>
someone added something to clean up tmp files 'n shit
<mjg>
so how many threads are in the child if you - t 1
<heat>
old logic has thread that collects stats and spawns threads. this logic is still there, but you fork once before spawning anything, and the stat collection is still done in-process
<mjg>
that is tad bit iffy but if it's not my call
<zid>
what does any of this have to do with opengl though is what I wanna know
<mjg>
s/if//
<mjg>
zid: will-it-scale is next to opengl in my repos/ directory
<mjg>
that's what
<GeDaMo>
Alphabetical order? :|
<mjg>
inode order!
<heat>
mjg, its kind of a yucky solution but it's the safest way to not fuck things up wrt process state. literally just a clean slate
<mjg>
i'm not the person which needsto be convinced
<mjg>
so
<mjg>
you do you
<heat>
there's no person that needs to be convinced
<mjg>
you gave u on upstream? :d
<heat>
yep
<mjg>
fuckwad
<mjg>
i'm gonna mail the guy and ask what's up then
<heat>
previously any ^C just leaked resources in /tmp
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<gorgonical>
I'm having coffee today with goat milk. I never knew that goat milk has the same funk that goat meat does
<sakasama>
It does! You can order your goat ice cream with bits of goat for a little extra texture.
<gorgonical>
I would totally do this
<gorgonical>
What's the difference between gold leaf and goat meat? They rhyme
<gorgonical>
slant rhyme*
<zid>
goat cheese is rank
<zid>
poor greeks
<gorgonical>
never. Chevre on crackers is goated
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<sakasama>
They had sheep too though, which have drinkable milk despite common ancestry.
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<zid>
Yea, but not enough, else they wouldn't have invented feta
<gorgonical>
I just appreciate the vast variety of cheese
<gorgonical>
Makes life worth living honestly
<heat>
mjg, is non-temporal better than a straight up rep stosb for page clearing?
<heat>
i remember you had long rants about this
<sham1>
πρρ
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<zid>
gorgonical: I'd appreciate it more if cheese was always non-corrupt
<zid>
adding goat's milk is almost as bad as that spanish maggot cheese
<gorgonical>
casu marzu seems like a quick trip to the hospital
<gorgonical>
I was reading about oberon a few days ago and played some with the emulators. Anyone here have experience with it? Like using it for real? I can't imagine it's very easy to do "real work" with these emulators
<zid>
maggots are clean, it's just nasty too think about
<gorgonical>
I mean the OS, by the way
<zid>
to*
<gorgonical>
zid: I read that the main danger is that if you don't chew thoroughly the maggots can cause issues
<zid>
maggots work nicely on open wounds, because they only eat dead flesh
<zid>
surviving being chewed, and the environment of the stomach, which has a sheddable lining, and still causing damage? seems unlikely to me
<gorgonical>
That's a good point. Maybe if you gorge yourself it could cause problems but I think you're right
<zid>
case in point
<zid>
birds fucking love maggots
<zid>
and they can't chew
<gorgonical>
so are the teeth in penguins just for grip? those... barb things
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<zid>
they catch very strong fish, underwater, so I assume so
<zid>
ever gone fishing?
<gorgonical>
not to catch antarctic sea fish, no
<zid>
even a tiny fish can pull REALLY hard in water
<zid>
I imagine without the barbs it'd be like trying to catch a greased pig that can do 80mph
<mjg>
heat: lmao
<gorgonical>
you ever seen a hardboiled penguin egg? the white becomes see-through
<mjg>
heat: nt is CRAP
<mjg>
heat: thank you
<zid>
I have not, why have you lol
<gorgonical>
just online lol
<heat>
mjg, thank me for what
<zid>
you do get it as the 4th image if you google penguin egg I suppose, to be fair
<gorgonical>
one goal of mine is to eat all the eggs. I love eggs and want to try them all
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<gog>
hi
<mjg>
heat: it's an expression
<heat>
ok
<mjg>
heat: anyhow i already said for 4k pages you get faster zeroing time, but are also evicting anything cached from the page
<mjg>
heat: in practice this results in more cache misses
<mjg>
== bad
<mjg>
lmao
<zid>
gorgonical: I like egg yolks a lot but hate egg whites :(
<mjg>
> Table 9 shows that Linux obtains a much higher tail latency on the Redis Cold workload under Frag-50/100 than Linux-4KB, because its on-allocation defragmentation significantly increases page fault latency. In contrast, FreeBSD does not
<mjg>
actively defragment memory, so it generates no latency spikes.
<mjg>
gotta love these fuckign geezers
<mjg>
he neglected to mention freebsd does not defragment to begin with
<zid>
sir your thermal printer is running out of thermal
<klys>
thanks heat
<heat>
no problem
<zid>
What is it?
<klys>
hercules monochrome via xvga box
<geist>
hm which color are you keying off of?
<zid>
white and nearly-white-pink is certainly a.. look
<gorgonical>
"ZAMGTECH ING"
<zid>
I didn't even notice the MSDOS part at first
<geist>
used to actually have a hercules compatible mono card and monitor, was nice to use for debugging dos
<geist>
actually could run windows 3.1 on it too
<mjg>
heh
<zid>
does it not just spit out ntsc?
<gorgonical>
klys: this is just your domain, right?
<mjg>
was hercules the card with the fixed non-standard resolution?
<zid>
or you know, (c|e|v)ga
<geist>
it's not ntsc at all. monochrome adaptors for PCs were its own connector, i think
<geist>
digital, on off, i dont think there was any shades just dithering
<geist>
hercules was a later defacto standard card that extended the original ibm pc mono card
<zid>
I've never seen a video format that wasn't just ntsc modified in some way I don't think
<geist>
but the nice thing was the framebuffer was in a different location from the regular cga/ega/vga, so you could actually run two screens at the same time
<geist>
zid: like vga? it has nothing at all to do with ntsc
<geist>
or anything after that
<zid>
hmm? They're basically identical?
<geist>
not even remotely
<zid>
The only difference is the colour burst not needing to be there
<geist>
vga is a proper vsync/hsync/3 colors pinout
<zid>
they still just sync on the edges, but it isn't all crammed over one pin
<zid>
you can have sync pins instead
<geist>
no real encoding, or needing to do the way of encoding colors, or anything
<zid>
composite video is just 'vga over one pin' effectively :P
<geist>
not really. no.
<zid>
(modulated up to ntsc freq)
<zid>
rather than just being 15khz stirahgt
<geist>
i mean if you zoom wayyyyyy out you can argue everything is the same thing, but at this level the closest thing vga is is full component video later
<geist>
but even that does the encoding of colors via luma/chroma/chroma
<zid>
yea I'm just taking a very broad view
<geist>
vga just has three separate RGB pins
<zid>
green's all you need
<zid>
mux the sync onto it, done
<geist>
anyway, no not really is the answer. cga/vga/monochrome in the PC world were pretty much straight parallel busses with separate pins for everything
<geist>
cga was even digital which was strange, but not that flexible in that case
<zid>
vga to component is like.. a couple of transistors and resistors
<geist>
look at how the color is encoded in component, it's fascinating, but not the same way as vga
<zid>
we were talking mono though, I did say the colour stuff was diff
<geist>
okey dokey
<zid>
the ota composite format needs to colourburst and yb-pb pb-au au-ag split blah blah
<klys>
geist, keying off green
<klys>
gorgonical, sort of. it points to my, like, server
<gorgonical>
cool domain is all I was saying. nice mnemonic
<klys>
k thx
<klys>
in an appt. bbiaf
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<mrvn>
zid: composite video is just one resistor.
<mrvn>
and my PAL composite video is in no way synced to ntsc
<mrvn>
(B-W composite)
<mrvn>
geist: isn't color for composite video a brightness with the yu components added as some wiggly stuff?
<geist>
yah
<mrvn>
Can't remember how they encode 2 amplitudes into a single wiggle though.
<geist>
even component video, it's lumina + 2 yu components, i think
<mrvn>
geist: not sure what component video is, I only know FBAS and composite video
<geist>
was a late thing before HDMI took over. 5 connectors
<geist>
no, like on consumer electronics begore hdmi was a thing
<mrvn>
"the common three-cable system using BNC" I was at least half right. :)
<geist>
but yeah most computer monitor stuff like VGA or i think the 13w3 connectors on sun workstations and whtnoat are more separate R G B signals, alongside other tuff
<geist>
or if monochrome, simply a single lumina line for the pixel
<geist>
was looking ath the IBM PC monochrome signal and it seems to be basically 3 lines: hsync vsync and TTL level video
<geist>
CGA was basically that except 6 bits of RGB, where each color has 2 bits. hence it being digital
<nortti>
isn't that EGA? aiui CGA was 3 bits + intensity
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<geist>
oh you might be right. was just grepping the internet
<geist>
ah you're right, ega extends the same eocnnector with more bits
<mrvn>
I've only managed to generate B/W composite video with 74xx logic chips + some video ram and even that was pretty and not always stable. Hard to get a clean 16MHz signal on cheapest chinese breadboards.
<mrvn>
s/pretty/pretty hard/
<zid>
And that's why we have 44.1kHz audio. QED.
<zid>
(The fact that that directly follows is hilarious)
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<mrvn>
zid: so you can't build a soundcard on a breadboard?
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<mrvn>
I believe we have 44.1kHz audio because dogs didn't invent sound cards.
<nortti>
funnily enough just watched a video that touched on where 44.1kHz came from (best fit for both PAL & NTSC when recording PCM audio onto video cassettes) https://www.youtube.com/watch?v=xSnrQBfBCzY
<bslsk05>
'Digital audio used to be stored on videotape — it was the only way we knew how' by Technology Connections (00:36:26)
<zid>
The aristocrats!
<mrvn>
aristocats?
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<gog>
meow
<mrvn>
no, gog's didn't invent sound cards either.
<zid>
gorg
<zid>
You're a python expert yes?
<zid>
Absolute wizz with a snake
<mrvn>
zid: 2 or 3?
<gog>
ehhhh
<gog>
i've barely used python 3
<zid>
I need a blender plugin to turn my thing into a C array
<gog>
i'm the way wrong person to talk to
<zid>
I made one for blender 2.7 but the api is probably all different now, but I didn't even really make it, I just butchered an obj plugin
<zid>
cus obj is plaintext and sprintfs numbers
<zid>
I guess I'll have to do the same again
<mrvn>
zid: why not save as STL and read that or similar?
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<Ermine>
gog: may I pet you
<gog>
yes
<zid>
is that notcheating
<geist>
nortti: yeah that was a great video
<geist>
i knew the 44.1 had something to do with video standards, but this makes sense
heat_ is now known as heat
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<gog>
oh neat i hadn't gotten around to watching the latest tech connections video
<gog>
might as well now
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<zid>
well I figured out the local dir to get it to load from at least, so I have a Bavefront Bobj plugin now
<mrvn>
I'm reading 32/64 bytes from a file on a filesystem. Would you add a loop around the read to handle short reads?
<gog>
🅱️obj
<heat>
Bob
* Ermine
pets gog
* gog
prr
gog is now known as qob
<qob>
my nick is now rotationally symmetrical on pi radians
<kazinsal>
:O
<zid>
I am using a pixel font,so it's literally true
* kazinsal
stealthily #undef PI #define PI 3.0f
<Ermine>
kazinsal: you broke the universe!
<mcrod>
hi
<qob>
nooooooo you can't just redefine a transcendental mathematical constant noooooooooooooo
<zid>
the q goes a little lower than the b goes up, sadly