Parallel functionality like proxsuite.proxqp.dense.solve_in_parallel missing from linux python proxsuite builds

[jberg7]

Hi all, I was hoping to use the python binding of your parallel solver implementation (e.g. proxsuite.proxqp.dense.solve_in_parallel), but it looks like it's missing from my linux proxsuite installation:

>>> import proxsuite
>>> help(proxsuite.proxqp.dense.solve_in_parallel)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'proxsuite.proxsuite_pywrap_avx512.proxqp.dense' has no attribute 'solve_in_parallel'

> pip show proxsuite
Name: proxsuite
Version: 0.6.7

From clicking around, it seems as though DBUILD_WITH_OPENMP_SUPPORT:BOOL=ON controls whether parallel methods get built into the project, and if I understand correctly that flag is not enabled for linux builds currently.

Is there a reason for this? I got excited when I saw support for parallel solving in the readme, and it would be great if I could use it without having to try to build proxsuite from source.

[fabinsch]

Hi @jberg7 thanks for your interest in proxsuite. I opened a PR on our conda-feedstock to build with openmp support by default.

For pip I'm not sure, we use cmeel and therefore define the requirements like this. A quick search for cmeel-openmp did not lead me anywhere. Is this planned @nim65s or did I overlook something?

[nim65s]

openmp is not a library, but a compiler extension.
For some compilers, there is a need for a companion library, for other not.

I guess it is possible to activate that on cmeel, but I need to test. This is already on my todolist for the end of the year :)

[fabinsch]

okay, nice thanks for the reply. So probably we will have it by default in conda soon, and maybe later for pip as well :)

[fabinsch]

Hi @jberg7, I just installed proxsuite in a new conda environment on my linux machine and now it comes with the proxsuite.proxqp.dense.solve_in_parallel function. It should be the same for macos and windows.

[jberg7]

Thanks @fabinsch! Appreciate your help with this - I was able to confirm that solve_in_parallel is available when I installed proxsuite in a new conda environment. Sadly my workflow is more pip based - do you know roughly when this functionality will be available from pip as well?

[jcarpent]

@nim65s Do you have a timeline to sync pip proxsuite build with openmp support?

[nim65s]

This is already on my todolist for the end of the year :)