Unable to set NumThreads when creating a job

Question

Kevin 2018-2-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/382275-unable-to-set-numthreads-when-creating-a-job

编辑： Edric Ellis 2018-2-16

I seem to be unable to set NumThreads when creating a job:

>> sge = parcluster('sge');
>> class(sge)
    'parallel.cluster.Generic'
>> sge.NumThreads
     1
>> job = sge.createJob('NumThreads',4);
>> class(job)
   'parallel.job.CJSIndependentJob'
>> job.NumThreads
     1

I'm able to set the other job properties just fine by passing arguments to createJob(). For now, my workaround is to modify the parallel.cluster.Generic object before creating the job:

>> sge.NumThreads = 4;
>> job = sge.createJob();
>> job.NumThreads
     4

Is this a bug? Or am I doing this wrong?

I am using the Parallel Computing Toolbox with MATLAB R2017a.

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Answer 1

Edric Ellis 2018-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/382275-unable-to-set-numthreads-when-creating-a-job#answer_305491

编辑：Edric Ellis 2018-2-16

Thanks for reporting this - it does indeed look like a bug. I'll forward this report to the appropriate team here at MathWorks.

To expand a little on this - NumThreads is only intended to be configurable on a per-cluster basis rather than a per-job basis. So, in this case, probably the createJob call should reject your attempt to set NumThreads on the job.