| 2 Mar 2023 |
 SomeoneSerge (matrix works sometimes) | Well, if they just switched to FindCUDAToolkit, that would've been perfect | 22:39:37 |
| SomeoneSerge (matrix works sometimes) | I'm wondering now if cmake would override CUDA_ARCHITECTURES if we just gave them on the command line | 22:39:56 |
| SomeoneSerge (matrix works sometimes) | (idk, does one need a CACHE flag in set for that, or does it just work) | 22:40:21 |
| SomeoneSerge (matrix works sometimes) | In reply to @ss:someonex.net
I'm wondering now if cmake would override CUDA_ARCHITECTURES if we just gave them on the command line Wow, I think it just worked | 22:49:45 |
 connor (he/him) | In reply to @ss:someonex.net
Wow, I think it just worked Do you mean instead of passing GPU_TARGET just providing CUDA_ARCHITECTURES? | 22:54:38 |
| SomeoneSerge (matrix works sometimes) | Yes, and MIN_ARCH. I'm waiting for the build to finish to check the binaries, I might have misunderstood their logs | 22:55:28 |
| connor (he/him) | I'll check with MIN_ARCH too -- when I got rid of GPU_TARGET it switched to building the default set of GPU targets and I saw this in the CMake logs:
magma> -- Found CUDA
magma> -- CUDA_CUDART_LIBRARY: CUDA::cudart
magma> -- compile for CUDA arch 3.0 (Kepler)
magma> -- compile for CUDA arch 3.5 (Kepler)
magma> -- compile for CUDA arch 3.7 (Kepler)
magma> -- compile for CUDA arch 5.0 (Maxwell)
magma> -- compile for CUDA arch 6.0 (Pascal)
magma> -- Define -DMAGMA_HAVE_CUDA -DMAGMA_CUDA_ARCH_MIN=300
| 22:56:23 |
| SomeoneSerge (matrix works sometimes) | Right, I see this too. Did you try providing empty GPU_TARGET? | 22:57:04 |
| SomeoneSerge (matrix works sometimes) | In reply to @ss:someonex.net
Well, if they just switched to FindCUDAToolkit, that would've been perfect LOOOOL | 22:57:54 |
| SomeoneSerge (matrix works sometimes) | They do use FindCUDAToolkit, but then they wrap it into their own set of weird options | 22:58:13 |
| connor (he/him) | I just removed GPU_TARGET entirely, I'll try it with no value next | 22:58:29 |
| connor (he/him) | Okay, well setting it to the empty string definitely gave a different result:
magma> -- Found CUDA
magma> -- CUDA_CUDART_LIBRARY: CUDA::cudart
magma> -- Define -DMAGMA_HAVE_CUDA -DMAGMA_CUDA_ARCH_MIN=890
| 22:59:16 |
| SomeoneSerge (matrix works sometimes) | They set the default list here: https://bitbucket.org/icl/magma/src/f4ec79e2c13a2347eff8a77a3be6f83bc2daec20/CMakeLists.txt#lines-120 | 22:59:39 |
| connor (he/him) | After this is done compiling, what's the easiest way to find out what architectures it built for? Would
cuobjdump result/lib/blarg | rg 'arch =' | sort | uniq
do the trick?
| 23:00:43 |
| SomeoneSerge (matrix works sometimes) | Yes | 23:00:55 |
| connor (he/him) | What's the package name that provides that utility? I'd like to nix shell into it and not install CUDA system-wide :l | 23:01:31 |
| SomeoneSerge (matrix works sometimes) | cudaPackages.cuda_cuobjdump | 23:01:59 |
| SomeoneSerge (matrix works sometimes) | or something like it | 23:02:03 |
| connor (he/him) | Awwww my heart ;(
$ cuobjdump ./result/lib/libmagma.so | rg "arch =" | sort -u
arch = sm_52
| 23:03:10 |
| SomeoneSerge (matrix works sometimes) | Redacted or Malformed Event | 23:10:05 |
| SomeoneSerge (matrix works sometimes) | Redacted or Malformed Event | 23:10:08 |
| SomeoneSerge (matrix works sometimes) | Redacted or Malformed Event | 23:10:13 |
| SomeoneSerge (matrix works sometimes) | Redacted or Malformed Event | 23:10:27 |
| SomeoneSerge (matrix works sometimes) | In reply to @connorbaker:matrix.org
Awwww my heart ;(
$ cuobjdump ./result/lib/libmagma.so | rg "arch =" | sort -u
arch = sm_52
Strange | 23:13:25 |
| SomeoneSerge (matrix works sometimes) | I think they end up reseting CUDA_ARCHITECTURES to an empty list | 23:14:38 |
| SomeoneSerge (matrix works sometimes) | CMakeCache.txt:CMAKE_CUDA_ARCHITECTURES:STRING=52
CMakeCache.txt:CUDA_ARCHITECTURES:UNINITIALIZED=86
| 23:19:46 |
| SomeoneSerge (matrix works sometimes) | Ok, I've got a good feeling about this one | 23:20:59 |
| SomeoneSerge (matrix works sometimes) | In reply to @hexa:lossy.network
we probably need https://github.com/numba/numba/pull/8691 https://github.com/numba/numba/pull/8691#issuecomment-1452616968 | 23:23:24 |
 hexa | what's the tl;dr? | 23:24:27 |
| hexa | I did apply that series in python-updates | 23:24:37 |
