Is there a way for a worker to see how many workers are in the parpool?

17 次查看（过去 30 天）
Bobby Brown
Bobby Brown 2016-6-28
回答： 埃博拉酱 2024-10-27，1:40
Hi,
Is there a way for a worker to see how many workers are in a parpool?
Currently i have this, but i have to change the value of NumWorkers before the parpool is started and for the first pctRunOnAll.
NumWorkers = 32;
ParallelPool = parpool(NumWorkers);
pctRunOnAll NumWorkers = 32;
pctRunOnAll ParaScript
I know that i can do..
ParallelPool.NumWorkers
..in the parent script but this doesn't work in a worker.
Thanks

请先登录，再回答此问题。

回答（2 个）

Harsh Sharma
Harsh Sharma 2024-10-26，18:26
Hi Bobby,
The “pctRunOnAll” command runs the specified code on all workers. So in your code the command “pctRunOnAll NumWorkers = 32;” sets the “NumWorkers” variable for all the workers and you can access it directly.
You can check the following documentation link to understand how “pctRunOnAll” works - https://www.mathworks.com/help/parallel-computing/pctrunonall.html
Parallel pools of up to 2000 workers are supported but the actual number of workers depends on various factors. You can check the following documentation to learn more about this topic - https://www.mathworks.com/help/parallel-computing/run-code-on-parallel-pools.html#bufclig-1:~:text=the%20period%20key).-,Factors%20That%20Affect%20Pool%20Size,-Parallel%20Computing%20Toolbox
埃博拉酱
埃博拉酱 2024-10-27，1:40
It is recommended that you use spmd instead of pctRunOnAll. In a spmd block, you can easily get the parallel pool size using spmdSize.

类别

在 Help Center 和 File Exchange 中查找有关 Clusters and Clouds 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by