parallel pool to increase code speed

2 ビュー (過去 30 日間)
Ahmed Abdulla
Ahmed Abdulla 2022 年 6 月 22 日
回答済み: Raymond Norris 2022 年 6 月 22 日
I have a very long code that uses a lot of functions which I have written, currently the code takes around 3 minutes to run. I have read about parallel pool but im not sure how to use it and if it would be a good option to use in my case to improve the running time of my code.
I have tried turning on parallel pool from the bottom left of the matlab menu and running my code but there was no differenece and from the task manager I can tell the same CPU usage is being allocated. Any advice is appreciated
  3 件のコメント
KSSV
KSSV 2022 年 6 月 22 日
We have to look into the code to suggest.

サインインしてコメントする。

回答 (1 件)

Raymond Norris
Raymond Norris 2022 年 6 月 22 日
Starting a parallel pool doesn't run subsequent MATLAB code in parallel, it simple starts a colletion of headless MATLAB processes. You need to use a parallel construct (e.g., parfor, gpuArray, etc.) to explicitly parallelize the code. Keep in mind that code that takes 3 minutes to run might improve with more resources, but it could also take more time just send data/instructions back and forth to all of the MATLAB processes. Explicit MATLAB multi-parallelism benifits more for longer running jobs (e.g, hours/days down to minutes/hours) than say running a job from 3 minutes to 3 seconds.
Based on the Profiler, have you identified for-loops that could benefit from being re-written as parfor? If so, what were the results of that?

製品


リリース

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by