flag whether or not a program has been called by createTask

2015 1 11
1 个回答
回答已采纳
更新时间：2016 1 11
1 次查看（30 天）

1 个投票

I run certain jobs either as standalone jobs, or in parallel, for example called by createTask. Is there some way to distinguish between these cases? obviously I could use brute force, use dbstack and related tools and check if the calling line had the word createTask in it, but I'd much prefer to do something more general/elegant. Since one can interact with programs in the former case, but not the latter, there must be something matlab knows that I can tap into...
Thanks very much for any help!
Leo

请先登录，再回答此问题。

 采纳的回答

Edric Ellis
Edric Ellis 2015-1-12
编辑：Edric Ellis 2015-1-12

2 个投票

One simple way is to check the return of getCurrentTask. This will always return empty in a desktop MATLAB session, and a parallel.Task object when running on a worker.

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Leo Simon
Leo Simon 2016-1-11
I accepted this answer but at the time I must have been running version R14b, with 15a it returns a warning
>> isempty(getCurrentTask)
Warning: Unexpected error trying to obtain the current task.
> In getCurrentTask (line 24)
Warning from getCurrentTask (line 24)
warning(message('parallel:cluster:GetCurrentTaskFailed'));
I can of course suppress the warning, but if this is the only/best way to check if I'm in parallel, then it's disappointing.
Edric Ellis
Edric Ellis 2016-1-11
编辑：Edric Ellis 2016-1-11
Hm, I don't see the warning in R2015a. What are your precise reproduction steps to get that? Here's what I did, after opening a (local) parallel pool:
>> getCurrentTask
ans =
[]
>> spmd, getCurrentTask, end
Lab 1:
ans =
Task with properties:
ID: 1
State: running
Function: @distcomp.nop
Parent: Job 7
StartTime: Mon Jan 11 12:43:28 GMT 2016
Running Duration: 0 days 0h 0m 60s
ErrorIdentifier:
ErrorMessage:
>>

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Job and Task Creation 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