Julia call from Python3 running in single core

ihnorton · November 26, 2016, 11:19pm

Unfortunately that doesn’t seem to work via pyjulia. OP tried 0.3, and I tested several versions:

`addprocs` leads to segfault

opened 04:39AM - 24 Nov 16 UTC

closed 07:51PM - 06 Dec 16 UTC

``` import julia j = julia.Julia(jl_runtime_path="/Users/inorton/git/julia/usr…/bin/julia", jl_init_path="/Users/inorton/git/julia/usr/bin") j.addprocs(1) #segfault ``` (segfault stack [here](https://gist.github.com/ihnorton/63dabfa2316d2e29eb0941eaa70ab7ce)) Based on the stack trace, I thought there might be some issue with task switching because of ctypes (libffi) stack. However, running the following (equivalent?) code does not segfault: ``` JLPATH="/Users/inorton/git/julia" import ctypes jl = ctypes.PyDLL(JLPATH+"/usr/lib/libjulia.dylib", ctypes.RTLD_GLOBAL) jl.jl_init(JLPATH+"/usr/bin/") jl.jl_eval_string(""" addprocs(1) """) jl.jl_eval_string(""" println(nprocs()) """) # 2 ``` Tested with 0.4.6, 0.5, and a several-day-old trunk build. (cross-ref: https://discourse.julialang.org/t/julia-call-from-python3-running-in-single-core/508)

Topic		Replies	Views
Construct and intermittently call a single Julia instance with JuliaCall Tooling python , juliacall , pyjulia	4	631	April 14, 2023
Pyjulia in desperate need of attention form someone who knows what they're doing General Usage	22	5864	November 24, 2017
Questions about pyjulia usage General Usage pyjulia	6	1939	November 11, 2021
Efficiency for calling Julia from python and purely run Julia General Usage	20	7657	May 28, 2022
Baffling addprocs() with @everywhere Julia at Scale	17	3517	April 24, 2018

Julia call from Python3 running in single core

Related topics