ASPP/2025-plovdiv-parallel-python
0
0
Fork 18
Code Issues Pull requests 8 Projects Releases Packages Wiki Activity Actions
2025-plovdiv-parallel-python/Exercise2c
History
aitor d17339a560 upload exercises
2025-09-24 09:09:07 +02:00
..
processed_images upload exercises 2025-09-24 09:09:07 +02:00
OUTDATED_process_image.py upload exercises 2025-09-24 09:09:07 +02:00
OUTDATED_process_many_times.py upload exercises 2025-09-24 09:09:07 +02:00
OUTDATED_process_multiple_images.py upload exercises 2025-09-24 09:09:07 +02:00
README.md upload exercises 2025-09-24 09:09:07 +02:00

README.md

Exercise 2c

Processing images with simultaneous multiprocessing and multithreading.

process_image.py processes a single image. It can be used as a script: process_image.py foo.jpg It is also an importable module. process_image.magic("foo.jpg")

process_multiple_images uses process_image to process a series of images. It should be called as following: process_multiple_images n_processes n_threads filename1.png filename2.png …

  1. start a separate terminal window with htop: gnome-terminal -- htop &

  2. call python process_multiple_images.py 2 2 images/*.png

You should see htop showing 4 threads (2 worked processes × 2 numpy threads).

Play with different numbers of processes and threads. Which combination is optimum (fastest)?