How can I know which worker performs each iteration of the parfor loop?

10 次查看（过去 30 天）
Policarpo Abascal
评论： Policarpo Abascal 2024-5-6
I want to know if it is possible to determine which worker performs each iteration of the parfor loop or if it is possible to assign each iteration to a worker.
  2 个评论
Thomas Ibbotson
Thomas Ibbotson 2024-5-2
We would usually advise against this, so it would be good to know why you want to do this. I will answer your question in detail below.
Policarpo Abascal
Policarpo Abascal 2024-5-6
Thank you. I have found the answer to my question in the suggestions you provided with 'getcurrentworker'.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Thomas Ibbotson
Thomas Ibbotson 2024-5-2
You can find out which worker is running your code using the following function: https://uk.mathworks.com/help/parallel-computing/getcurrentworker.html
You can achieve more control over how iterations are divided amongst worker using parforOptions: https://uk.mathworks.com/help/parallel-computing/parforoptions.html
Edric Ellis
Edric Ellis 2024-5-2
编辑：Edric Ellis 2024-5-2
You can use getCurrentTask (if you're using a process pool rather than a thread pool). This has a field ID which tells you which task is operating, like this:
parfor i = 1:N
t = getCurrentTask();
fprintf('Iteration %d on task %d\n', i, t.ID);
end
It's not possible with parfor to assign iterations to workers. You can have more control with spmd - but we'd need to know more about what it is you're trying to achieve.

类别

在 Help Center 和 File Exchange 中查找有关 Parallel for-Loops (parfor) 的更多信息

标签

产品


版本

R2024a

Community Treasure Hunt

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

Start Hunting!

Translated by