In reply to @gmacon:matrix.org

I'm trying to build the Rust candle-kernels crate within Nix, and nvcc is complaining that gcc is too new. I have gcc 13.2.0 and nvcc version 12.2.140 from nixpkgs-24.05-darwin bb8bdb47b718645b2f198a6cf9dff98d967d0fd4.

  /nix/store/r45hzi56bzljzfvh6rgdnjbisy9pxqnj-cuda-merged-12.2/include/crt/host_config.h:143:2: error: #error -- unsupported GNU version! gcc versions later than 12 are not supported! The nvcc flag '-allow-unsupported-compiler' can be used to override this version check; however, using an unsupported host compiler may cause compilation failure or incorrect run time execution. Use at your own risk.
        |  ^~~~~
  thread 'main' panicked at /home/gmacon3/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bindgen_cuda-0.1.5/src/lib.rs:391:13:
  nvcc error while compiling "src/affine.cu":

  # CLI "nvcc" "--gpu-architecture=sm_90" "--ptx" "--default-stream" "per-thread" "--output-directory" "$PWD/target/debug/build/candle-kernels-809f3e0b9ee8b48d/out" "-Isrc" "-I/nix/store/r45hzi56bzljzfvh6rgdnjbisy9pxqnj-cuda-merged-12.2/include" "src/affine.cu" 

Have other folks seen this? What's the best approach to resolve this?

older gcc

Note that if you're building a shared library you're going to run into libc issues if you just use gcc12Stdenv. THat's why we have cudaPackages.backendStdenv

In reply to @ss:someonex.net

older gcc

Note that if you're building a shared library you're going to run into libc issues if you just use gcc12Stdenv. THat's why we have cudaPackages.backendStdenv

In reply to @gmacon:matrix.org
Since this is a Rust project, I'm not building any shared libraries, but this is good to know. Thanks!

In reply to @ss:someonex.net
(also relevant if you're loading other shared libraries, e.g. as plugins)

In reply to @zimbatm:numtide.com
hexa (UTC+1): can you give us the new stats after you add that cache :)

hmm, ollama is failing for me on unstable

Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.680-04:00 level=INFO source=sched.go:715 msg="new model will fit in available VRAM in single GPU, loading" model=/srv/fast/ollama/models/blobs/sha256-5ff0abeeac1d2dbdd5455c0b49ba3b29a9ce3c1fb181b2eef2e948689d55d046 gpu=GPU-c2c9209f-9632-bb03-ca95-d903c8664a1a parallel=4 available=12396331008 required="11.1 GiB"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.681-04:00 level=INFO source=memory.go:309 msg="offload to cuda" layers.requested=-1 layers.model=28 layers.offload=28 layers.split="" memory.available="[11.5 GiB]" memory.required.full="11.1 GiB" memory.required.partial="11.1 GiB" memory.required.kv="2.1 GiB" memory.required.allocations="[11.1 GiB]" memory.weights.total="10.1 GiB" memory.weights.repeating="10.0 GiB" memory.weights.nonrepeating="164.1 MiB" memory.graph.full="296.0 MiB" memory.graph.partial="391.4 MiB"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.695-04:00 level=INFO source=server.go:391 msg="starting llama server" cmd="/tmp/ollama1289771407/runners/cuda_v12/ollama_llama_server --model /srv/fast/ollama/models/blobs/sha256-5ff0abeeac1d2dbdd5455c0b49ba3b29a9ce3c1fb181b2eef2e948689d55d046 --ctx-size 8192 --batch-size 512 --embedding --log-disable --n-gpu-layers 28 --parallel 4 --port 35991"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.696-04:00 level=INFO source=sched.go:450 msg="loaded runners" count=1
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.696-04:00 level=INFO source=server.go:591 msg="waiting for llama runner to start responding"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.696-04:00 level=INFO source=server.go:625 msg="waiting for server to become available" status="llm server error"
Sep 07 15:59:47 sink1 ollama[1314]: /tmp/ollama1289771407/runners/cuda_v12/ollama_llama_server: error while loading shared libraries: libcudart.so.12: cannot open shared object file: No such file or directory
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.947-04:00 level=ERROR source=sched.go:456 msg="error loading llama server" error="llama runner process has terminated: exit status 127"

In reply to @adam:robins.wtf

hmm, ollama is failing for me on unstable

Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.680-04:00 level=INFO source=sched.go:715 msg="new model will fit in available VRAM in single GPU, loading" model=/srv/fast/ollama/models/blobs/sha256-5ff0abeeac1d2dbdd5455c0b49ba3b29a9ce3c1fb181b2eef2e948689d55d046 gpu=GPU-c2c9209f-9632-bb03-ca95-d903c8664a1a parallel=4 available=12396331008 required="11.1 GiB"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.681-04:00 level=INFO source=memory.go:309 msg="offload to cuda" layers.requested=-1 layers.model=28 layers.offload=28 layers.split="" memory.available="[11.5 GiB]" memory.required.full="11.1 GiB" memory.required.partial="11.1 GiB" memory.required.kv="2.1 GiB" memory.required.allocations="[11.1 GiB]" memory.weights.total="10.1 GiB" memory.weights.repeating="10.0 GiB" memory.weights.nonrepeating="164.1 MiB" memory.graph.full="296.0 MiB" memory.graph.partial="391.4 MiB"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.695-04:00 level=INFO source=server.go:391 msg="starting llama server" cmd="/tmp/ollama1289771407/runners/cuda_v12/ollama_llama_server --model /srv/fast/ollama/models/blobs/sha256-5ff0abeeac1d2dbdd5455c0b49ba3b29a9ce3c1fb181b2eef2e948689d55d046 --ctx-size 8192 --batch-size 512 --embedding --log-disable --n-gpu-layers 28 --parallel 4 --port 35991"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.696-04:00 level=INFO source=sched.go:450 msg="loaded runners" count=1
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.696-04:00 level=INFO source=server.go:591 msg="waiting for llama runner to start responding"
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.696-04:00 level=INFO source=server.go:625 msg="waiting for server to become available" status="llm server error"
Sep 07 15:59:47 sink1 ollama[1314]: /tmp/ollama1289771407/runners/cuda_v12/ollama_llama_server: error while loading shared libraries: libcudart.so.12: cannot open shared object file: No such file or directory
Sep 07 15:59:47 sink1 ollama[1314]: time=2024-09-07T15:59:47.947-04:00 level=ERROR source=sched.go:456 msg="error loading llama server" error="llama runner process has terminated: exit status 127"

In reply to @connorbaker:matrix.org
SomeoneSerge (nix.camp): at the top of https://github.com/NixOS/nixpkgs/pull/339619 I have a list of packages I found which have environments with mixed versions of CUDA packages. Any ideas on how best to test for cases where code loads arbitrary / incorrect versions of CUDA libraries? As an example, I’d hope OpenCV would load the CUDA libraries it was built with, and the other packages would load the CUDA libraries from their expressions (not the OpenCV one).

Off the top of my head, I'd say we prepare a function under pkgs.testers for running an arbitrary command with LD_DEBUG=libs, parsing its outputs, and running asserts of the form:

• soname was/was not searched for
• soname was/was not loaded
• soname was/was not loaded from a path matching a pattern

As an example, I’d hope OpenCV would load the CUDA libraries it was built with, and the other packages would load the CUDA libraries from their expressions (not the OpenCV one).

in most of our practical cases (native extensions in python) it's "who gets there first"

So... PyTorch does something similar, in that packages with extensions are supposed to use the same version of CUDA libraries the PyTorch package was built with (and so we have cudaPackages in torch.passthru for downstream consumers).

Assuming OpenCV, PyTorch, and the other packages using CUDA libraries don't play nicely with each other, are there any solutions you can think of?
Best I can imagine is some sort of logic to compute the maximum supported version of cudaPackages or else package consumers being responsible for handling that themselves. Outside of that, unless there's a way to ensure each package has a unique namespace for libraries it looks for, and they can co-exist in the runtime, I don't know how to resolve such and issue.