gpuq 1.4.0

A multi-vendor GPU querying utility with minimal dependencies

gpuq - multi-vendor GPU querying utility with minimal dependencies

This small library is a direct answer to the lack of a lightweight, cross-compatible utility to query available GPUs - regardless of what vendor, distro, or overall environment one might be using.

In particular, the implementation meets the following requirements:

• works with multiple downstream runtimes (currently supported: CUDA and HIP)
  • will also work if you have multiple present at the same time (do you really, though?)
• no build- or install-time dependencies (including any python packages)
• any runtime dependencies are soft - unless the user explicitly asks for the status/presence of a particular downstream runtime, most methods will fail silently
• consequently, the package should install and run on pretty much any machine
  • your laptop does not have a GPU? -> the package will report 0 GPUs available (duh), no exceptions, linker errors, etc.
• allows for easy mocking (for unit tests, etc.)
• fully typed (conforms to mypy --strict checking)

Compared to some existing alternatives, it has the following differences:

• torch.cuda - not lightweight, also requires a different wheel for NVidia and HIP
• gputil - NVidia specific, also broken dependencies (as of 2025)
• gpuinfo - NVidia specific, broken import gpuinfo...
• gpuinfonv - NVidia specific, requires pynvml
• pyamdgpuinfo - AMD specific
• igpu - NVidia specific, broken installation (as of 2025)
• and so on...

The primary functionality offered is:

• check how many GPUs are available
• query properties for each available device - will tell you some basic info about the provider (CUDA/HIP) and other info similar to cudaGetDeviceProperties
  • the returned list is not comprehensive, though
• respects *_VISIBLE_DEVICES and provides mapping between local (visible) and global indices
  • NOTE: this temporarily modifies env variables and therefore is not thread-safe
• if requested, lazily provides some runtime information about each GPU as well
  • in particular, PIDs of processes using the GPU will be returned
  • NOTE: this is currently done rather naively by parsing outputs of tools like nvidia-smi or rocm-smi
• allows to check for runtime errors that might have occurred while trying to load

How it works:

The implementation will attempt to dynamically lazy-load libcudart.so and libamdhip64.so at runtime. For GPUs to be properly reported, the libraries have to be found by the dynamic linker at the moment any relevant function call is made for the first time. (If a library fails to load, loading will be retried every time a function call is made).

Examples

Install with:

pip install gpuq

Return the number of available GPUs:

import gpuq as G

print(G.count()) # this includes GPUs from all providers, disregarding *_VISIBLE_DEVICES
print(G.count(visible_only=True)) # only visible GPUs from all providers
print(G.count(provider=G.Provider.HIP, visible_only=True)) # only visible HIP devices
# etc.

Return a list of gpu properties:

import gpuq as G

for gpu in G.query(visible_only=True, provider=G.Provider.ANY):
    print(gpu.name)

# return all visible GPUs, raise an error if no CUDA devices are present
# (note: the required check if done against the global set, not the return set - see the docs)
gpus = G.query(visible_only=True, provider=G.Provider.ANY, required=G.Provider.CUDA)

Provide mapping between local and global GPU indices:

import gpuq as G

# assume a system with 8 GPUs and CUDA_VISIBLE_DEVICES=1,7
for gpu in G.query(): # by default return visible GPUs only
    print(gpu.index, gpu.system_index)

# should print:
# 0 1
# 1 7

for gpu in G.query(visible_only=False):
    print(gpu.index, gpu.system_index, gpu.is_visible)

# should print:
# None 0 False
# 0 1 True
# None 2 False
# None 3 False
# None 4 False
# None 5 False
# None 6 False
# 1 7 True