parallel pool to increase code speed

15 次查看（过去 30 天）
Ahmed Abdulla
Ahmed Abdulla 2022-6-22
回答： Raymond Norris 2022-6-22
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 个评论
显示 1更早的评论
Ahmed Abdulla
Ahmed Abdulla 2022-6-22
@KSSV Yes I have already used profile and got rid of all unneeded loops and vectorised what I can and now i got to parralel pool
KSSV
KSSV 2022-6-22
We have to look into the code to suggest.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Raymond Norris
Raymond Norris 2022-6-22
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?

类别

在 Help Center 和 File Exchange 中查找有关 Parallel Computing Fundamentals 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

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

Start Hunting!

Translated by