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<DavidHeidelberg>
mareko: idea, I'll test against r300 which is on TGSI, there the test should fail same way (in ideal conditions)
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<tarhun>
The scala carries very deep mathematical science soul in this, and the way bitset is programmed represents their very deep mathematical insights and soul, it has not much to figure out from the programming side, in any of the languages, cause it's about mersenne numbers. carries historical reference and signifficance.
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<tarhun>
the odds are 99:1 that you would not figure it out from the programming standpoint, or computer science, it's rooted into pure maths though instead. Ancient central europes math where euler and mersenne lived etc.
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<tarhun>
you end up doing something that you match against closest mersenne number and count the bits likely.
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<tarhun>
this is a very deep concept but that was 15. century and forward in central europe when they had such thinkers
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<tarhun>
it's a combined art, where outside mathematics computer solves things in certain ways, for an example, the loops can subscale to a refined results, to correct the false positives
<tarhun>
so it's not pure math either cause computer solves it one of it's kind in unique but not common way
<tarhun>
so it's a predicate that tests based of the condition that equals zero, how much false positives there will be, and eliminates them inside of the loop
<tarhun>
that is an iterative algorithm, but today higher modern computers are very good at it
<tarhun>
it's a second best today cause it's almost as good as the other for only newer computers though, and the method is very big englightnment
<tarhun>
they are not competing those methods, cause one is already in hardware :)
<tarhun>
those loops done with opencl kernels would work very well
<tarhun>
however something different would work even better
<tarhun>
this how the algorithm recovers from bad match is indeed divide and conquer
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<DavidHeidelberg>
mareko: did u managed to run the test (it's pretty small simple, no extra deps stuff)? It currently runs in our CI for r300, but in older version
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<DavidHeidelberg>
should iris work with LIBGL_DRI3_DISABLE=true?
<DavidHeidelberg>
(HW TGL)
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<mareko>
DavidHeidelberg: no
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<mareko>
why do some drivers depend on libllvmspirv?
<karolherbst>
mareko: they use OpenCL C to write internal shaders
<mareko>
kisak: I can't build iris without LLVMSPIRVLib
<karolherbst>
kisak: nah, they really need that at compile time now
<karolherbst>
anv as well
<mareko>
I don't know how to build LLVMSPIRVLib
<karolherbst>
install a package? otherwise I can throw you my llvm build script
<mareko>
I use llvm main
<karolherbst>
okay, then let me pastebin my script in a second
<kisak>
karolherbst: ah right, intel-clc to support intel-rt. mareko still has a chance of avoiding the dependency with intel raytracing / intel-clc turned off.
<karolherbst>
the hard part is only getting the compile flags right, because llvm is cursed there...
<mareko>
amazing
<kisak>
Mesa 23.3 on ubuntu wasn't doing intel-clc on the 32 bit build because libllvmspirvlib15 wasn't built for i386 https://packages.ubuntu.com/jammy-updates/libllvmspirvlib15 . mesa 24.0 made that manditory as a false positive in the meson config. tjaalton was nice enough to put in a temporary patch to take care of the false positive
<kisak>
Unless something new has come up since 24.0-branchpoint, I don't think the factoid in my head is wrong here.
<karolherbst>
yeah, it is new for 24.1
<kisak>
Okay, good to know.
<karolherbst>
however there is the possitiblity to build intel_clc alone and use that as a dep
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<karolherbst>
but not sure how much sense that makes
<enzuru>
Hey all. I am working on porting the Rusticl driver to GNU Guix. I have managed to get it to successfully compile and produce a rusticl.icd file. I have set RUSTICL_ENABLE=radeonsi and OCL_ICD_VENDORS=/home/enzuru/src/mesa/builddir/src/gallium/targets/rusticl but clinfo still shows 0 devices... any thoughts on what I should debug?
<mareko>
I hope I don't need to build clang now: meson.build:1872:23: ERROR: C++ shared or static library 'clangBasic' not found
<karolherbst>
mareko: you do
<mareko>
amazing
<karolherbst>
well.. clang is the OpenCL C frontend we use... I have the random idea to write our own, but.....
<karolherbst>
enzuru: rusticl is listed as a platform, right?
<mareko>
I guess I just won't build iris and asahi
<karolherbst>
well.. my script builds all those things correctly, shared/static whatever you want, but yeah, that's fair, can always let CI tell you when something bad happens
<enzuru>
OK, some background. I am using 23.3 because it's a bit more compatible with Guix tooling. I also have mesa-opencl-icd installed through Guix, as opposed to this git repo I am working from.
<karolherbst>
ohhh
<karolherbst>
mhhh
<mareko>
does anybody want to run clang-format on r600
<karolherbst>
enzuru: what's your `meson configure` output?
<karolherbst>
and anyway, did you set -Dgallium-rusticl=true?
<karolherbst>
enzuru: ahh.. that's the khronos loader
<karolherbst>
enzuru: then you need the MR I linked above
<karolherbst>
but mhh..
<karolherbst>
you did point OCL_ICD_VENDORS to the directory, not the file,r ight?
<karolherbst>
I think you have to end it with a slash...
<enzuru>
i did to the directory, but i did not end with a slash :) however, i thought none of that mattered if i used meson devenv ?
<karolherbst>
that MR was opened because it didn't work with the khronos loader
<enzuru>
Gotcha... let's see if I can "backport" that line to 23.3... should be easy enough
<karolherbst>
yeah.. though it shouldn't matter after installing anyway
<karolherbst>
though mhh..
<karolherbst>
I have no idea how the ocl loader search path stuff would even work? I guess you just install an env file or something?
<karolherbst>
mhhh...
<DemiMarie>
Ouch, that is going to be really annoying for distros.
<DemiMarie>
Does this mean they will need to patch their LLVM?
<karolherbst>
?
<karolherbst>
no
<karolherbst>
why would they?
<DemiMarie>
I thought that llvmspirvlib could not be built outside of the LLVM source tree
<karolherbst>
it can
<DemiMarie>
Ah
<karolherbst>
it's how fedora does it at least
<karolherbst>
it can't if your packaging is broken
<enzuru>
hmm... no cigar on that line helping with clinfo... hmm
* DemiMarie
wishes that glibc was changed to support shared two stage symbol lookup, so that libraries needed by Mesa didn’t cause clashes with libraries needed by applications
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<clever>
DemiMarie: ive had issues (on nixos) due to the version of glibc itself
<clever>
in my case, steam and glibc are old, but mesa wanted a newer glibc
<karolherbst>
enunes: enzuruit doens't look like the opencl loader is even trying to load rusticl
<karolherbst>
enzuru: mind trying with `OCL_ICD_FILENAMES` and pointing to the so file?
<enzuru>
perhaps this is caused by using the pre-packaged opencl loader ?
<karolherbst>
it shouldn't be?
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<enzuru>
karolherbst: do you mean to the icd file ? if not, which .so should i be looking for ?
<karolherbst>
libRusticlOpenCL.so
<enzuru>
kk
<karolherbst>
mhh.. though not sure if calls to dlopen appear in that log...
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<enzuru>
so i am wondering if there is some other tomfoolery going on with Clang in Guix
<karolherbst>
probably
<enzuru>
understood, thanks for the support. gonna take a break and come back to it later. Guix gets super Inception-y with the profiles (for instance, I am building inside a temporary profile with temporary packages that is different from my home profile) so sometimes it's difficult to reason about
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<enzuru>
maybe i should reach out to whomever packaged Rusticl for Nix :P
<enzuru>
just bought FF16... that should help me unwind
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<karolherbst>
have fun
<DavidHeidelberg>
mareko: no was reply to iris on dri2 or nine-tests run?