Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

MulticoreEvalParallelSampler not forking?!

See original GitHub issue

Bug description

I have code that works fine with SingleCoreSampler but throws this odd fault with MulticoreEvalParallelSampler?

Full trace attached as dbug-multcore.txt dbug-multcore.txt

Expected behavior i expect the code to work faster with n>1 core!

To reproduce [A minimal example to reproduce this error, ideally a python script.]

Code attached as cvsimTutorial4dbug.py.txt cvsimTutorial4dbug.py.txt

Environment [Report at least the pyABC version (pip show pyabc),

Version: 0.10.13

python version (which python; python --version),

Python 3.8.5

and system (Ubuntu/Mac/…).]

MacOS v10.15.7

Issue Analytics

State:
Created 2 years ago
Comments:9

Top GitHub Comments

1reaction

rbelewcommented, Oct 12, 2021

hi @EmadAlamoudi , back in a place where i can test more thoroughly on different platforms and … i’m getting different behaviors!? So i’m closing this issue until i can produce a sharper version!

0reactions

EmadAlamoudicommented, Oct 14, 2021

Hi @rbelew , Thanks for the update. Please don’t hesitate to reopen the issue once you have the newer version.

Top Results From Across the Web

Parallel sampling — pyABC documentation - Read the Docs

Requires no pickling of the sample_one , simulate_one and accept_one function. This is achieved using fork on linux (see Sampler ). The simulation...

Python multithreading and PyJulia error: At least one worker is ...

I can spawn Julia processes in single core mode (using SingleCoreSampler rather than MulticoreEvalParallelSampler setting of the PyABC library).

BUG: Can't pickle local object · Issue #286 · ICB-DCM/pyABC

If Linux, this seems to be indeed strange, because afaik the forking employed in the multiprocessing module should not perform pickling at all....

Check If Forked Processing ("multicore") is Supported - R

R running on Microsoft Windows does not support forked processing. In R, forked processing is often referred to as "multicore" processing, which stems...

Getting Started - | notebook.community

Clearly the default parameters in the MMT file are not quite right, but we are able to run the ... Only pyabc MulticoreEvalParallelSampler...