Stack Overflow
Stack Overflow

Questions tagged [multiple-processes]

the execution of multiple concurrent processes in a system

110 questions
18
votes
7 answers

IPC (inter process communication) between python and java

First, a little explanation of why I'm asking this question in the first place: I'm writing a python program (with a wxPython gui) that needs to call a Java AWT program from python and extract data from it. I have an in-process working solution on…
Adam Fraser
  • 6,255
  • 10
  • 42
  • 54
7
votes
3 answers

Is using Parcelable the right way to send data between applications?

I am trying to understand how to communicate between applications in Android - not just between Activity instances. I set up a 'client' that sends a Messenger obj to a Service (in the Intent sent to the service); the service creates a Message obj…
Art Swri
  • 2,799
  • 3
  • 25
  • 36
7
votes
1 answer

Problems in code with multiple child creation

This code is part of my OS project, the project asks to make something where apply concurrent processes, I decided to make a client server poker project with two players where I use sons and grandson processes to determinate the hand value. The…
abc
  • 11,579
  • 2
  • 26
  • 51
6
votes
1 answer

How to collect prometheus metrics from multiple python-flask sub-process?

I have main() function which spawns two separate sub-processes. These both sub-process shares metrics. How can I share metrics for both process and keep it updating? Here, is my snippet for more understanding. from multiprocessing import…
Sahil Sangani
  • 109
  • 1
  • 2
  • 6
6
votes
1 answer

Docker container not utilizing cpu properly

Single docker container is working good for less number of parellel processes but when we increase the number of parellel processes to 20-30 the process execution get slows. The processes are getting slow but still the docker is utilizing only…
shubhamsoni136
  • 81
  • 6
6
votes
1 answer

Werkzeug and class state with Flask: How are class member variables resetting when the class isn't being reinitialized?

I'm trying to write a flask extension that needs to persist some information between requests. This works fine when I run Werkzeug with a single process but when I run with multiple processes I get some odd behavior that I don't understand. Take…
Ivanna
  • 1,197
  • 1
  • 12
  • 22
6
votes
1 answer

Synchronization of asynchronous reading from stdout of child process

I have application that launches sub process and processes its stdout asynchronously. The problem is that the async operation takes some time and I want method responsible for process execution to end after all async IO operations are done. I have…
Vyktor
  • 20,559
  • 6
  • 64
  • 96
5
votes
1 answer

Sigsuspend equivalent to atomic series of sigprocmask, pause, sigprocmask?

I was reading my textbook's chapter (CS:APP, 3rd ed., chapter 8, page 781) on signals/ECF for Linux x86-64 systems, and came across this: The sigsuspend function temporarily replaces the current blocked set with mask and then suspends the process…
k0zm0tis
  • 69
  • 2
5
votes
3 answers

Running Multiple python processes in Docker

I am new to docker, trying to run multiple python processes in docker. Though it's not recommended, however, it should work as suggested here "https://docs.docker.com/engine/admin/multi-service_container/" My Dockerfile : FROM…
Shubham Jain
  • 876
  • 1
  • 9
  • 17
5
votes
1 answer

Spawn a new independent process in node.js

Is there any way to spawn a new independent process from the current running script? I am trying to run a new script from an already running script. The new script should be independent of the one that called it.
Arham Chopra
  • 79
  • 1
  • 5
5
votes
3 answers

Why does simple 3-way majority voting not solve Byzantine faults?

I have been reading many papers recently about Byzantine fault tolerance. There is a common proof that 3m+1 computers are needed to handle m Byzantine faults. The general proof goes something like this: There are three "generals": A, B, and C.…
Chris Brown
  • 61
  • 1
  • 3
5
votes
2 answers

Preventing debugging session from pausing after each inferior exits

I'm debugging a tree of processes using gdb's very handy multiple-inferior support: (gdb) set detach-on-fork off (gdb) set schedule-multiple on (gdb) set follow-fork-mode parent (gdb) break PostgresMain (gdb) break PostmasterMain and now need to…
Craig Ringer
  • 307,061
  • 76
  • 688
  • 778
4
votes
2 answers

Running two different independent PyTorch programs on a single GPU

I have a single NVIDIA GPU which has a memory of 16GB. I have to run two different (and independent; meaning, two different problems: one is a vision type task, another is NLP task) Python programs. The codes are written using PyTorch and both the…
Coder
  • 151
  • 6
4
votes
2 answers

Injecting dependencies in multiprocess Android applications

TLDR: I am developing an application which runs in multiple processes. For the purposes of UI testing, I want to inject a fake API dependency to make the app running under tests independent of network interactions, however, this doesn't seem to work…
karlicoss
  • 2,501
  • 4
  • 25
  • 29
4
votes
1 answer

Debugging with GDB over several processes

Without getting into to to much detail, I'm working on a program that consists of several separate processes all running on embedded QNX RTOS. They don't have a parent-child relationship, they are all spawned using spawnlp(P_NOWAIT, ...) and they…
Harley Freeman
  • 45
  • 5
1
2 3 4 5 6 7 8