Category "multiprocessing"

How to wait in bash script to subprocess, if one of them failed so stop everyone

How to wait in bash script to subprocess and if one of them return exit code 1 so I want to stop all subprocess. This is what I tried to do. But there are a som

how to read from h5py in multiprocessing without errors

I have code like: def get_df(path, key): with h5py.File(path) as hdf: df = pd.DataFrame(np.array(hdf[key])) return df def f(key): df = get_

Run simultaneous process inside python class

I'm developping a game using pygame and I want to create a loading screen while the assets are loaded. The loading screen have animations, so loading screen and

A case for multiprocessing?

Say I have a function that gives me a lot of data coming from a device when called. I want to accumulate this data in a memory buffer. When the buffer reaches a

Is there a way to take advantage of multiple CPU cores with asyncio?

I've created a simple HTTP Server with python and asyncio. But, I have read that asyncio-based servers can only take advantage of one CPU core. I am trying to f

Is there any way to increase the size during memory sharing between process in PyTorch

My current code is like this: import torch import torch.multiprocessing as mp t = torch.zeros([10,10]) t.share_memory_() processes = [] for i in range(3):

Occasional deadlock in multiprocessing.Pool

I have N independent tasks that are executed in a multiprocessing.Pool of size os.cpu_count() (8 in my case), with maxtasksperchild=1 (i.e. a fresh worker proce

Python 3.6+: Nested multiprocessing managers cause FileNotFoundError

So I'm trying to use multiprocessing Manager on a dict of dicts, this was my initial try: from multiprocessing import Process, Manager def task(stat): tes

pytorch DataLoader extremely slow first epoch

When I create a PyTorch DataLoader and start iterating -- I get an extremely slow first epoch (x10--x30 slower then all next epochs). Moreover, this problem occ

How to dynamically change self variables, parameters, args... in multiprocessing?

I don't know much of Python yet, but I'm trying to create an app that controls multiple streams of sound simultaneously (It has to do with binaural beats, noise

Real time plotting of serial data with python and tkinter

I have been working for some time to find a way to graph incoming data from an arduino with a Python GUI. I was able to accomplish this using the Matplotlib ani

Why does python multiprocessing script slow down after a while?

I read an old question Why does this python multiprocessing script slow down after a while? and many others before posting this one. They do not answer the prob

Multiprocessing OpenCV in Python

I have a simple Algorithm, I want to run it fast in parallel. The algo is. while stream: img = read_image() pre_process_img = pre_process(img) text

mp.set_start_method('spawn') triggered an error saying the context is already been set

Here is my full code I have succeeded to reproduce the behavior of my main code with a little snippet. In a Google Colab Env, suppose I setup hardware accele

Python - How to use FastAPI and uvicorn.run without blocking the thread?

I'm looking for a possibility to use uvicorn.run() with a FastAPI app but without uvicorn.run() is blocking the thread. I already tried to use processes, subpro

Best way to wait for queue population python multiprocessing

It is first time I play with parallel computing seriously. I am using multiprocessing module in python and I am running into this problem: A queue consumer run

GitHub Actions - parallel self-hosted runners on the same machine

Question related to the topic of Parallelism in Self-Hosted Runners: One self-hosted runner can only run one job at a time, when no available runners are id

Python: How to efficiently open and read a zipfile from multiple processes

I'm trying to open the same .zip file from multiple processes using zipfile and multiprocessing. When I open the .zip file using the with zipfile.ZipFile(self.

python multiprocessing queue implementation

I'm having trouble understanding how to implement queue into a multiprocessing example below. Basically, I want the code to: 1) spawn 2 processes (done) 2) s

Swoole process is hanging forever

I have the simplest Swoole code, which sleeps for a second and prints "Run task" message to the screen. <?php namespace Tests\Util; use PHPUnit\Framework\T