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Raymond Norris


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MathWorks

121 total contributions since 2003

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Answered
Why parfor is slower than for when accessing 3-D array?
It's tough to say if this is one script or if you've cobled together the outputs. If it's all one script, the 2nd for-loop will...

2 days ago | 0

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Answered
MATLAB Distributed Computing Server and MATLAB job scheduler (MJS)
Any user will be able to start MATLAB on the client and submit a job, regardless if a job is already running. MJS is a fifo sch...

18 days ago | 0

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Answered
Shutting down some CPUs
Try maxNumCompThreads(8);

26 days ago | 2

Answered
Parallel Computing on cluster
As it is written, the parallel pool will start when the parfor is called, which is then included in the timing. And since you'r...

29 days ago | 0

Answered
HELP: received error when trying to run two functions in parallel.
It's unclear to me what could be causing the exception. Might need to troubleshoot this with Technical Support (support@mathwor...

1 month ago | 0

Answered
Matlab only uses half of the number of logical cores. How can I use all of them?
Increase the cluster profile's number of workers. c = parcluster; c.NumWorkers = 12; p = c.parpool(12); You might not see an...

1 month ago | 0

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Answered
Can't use as many cores as available
I believe what you're saying is that from your desktop machine you connect to some server. From there, you run MATLAB on a mach...

2 months ago | 0

Answered
Slim installation of MATLAB Runtime
Paul see if this will help: https://www.mathworks.com/help/compiler/package-matlab-standalone-applications-into-docker-images.ht...

2 months ago | 0

Answered
Submitting batch jobs across multiple nodes using slurm
Hi Sebastian, I'm going to assume that my_script is the code "workerTable{ii} = ..." There are several ways to approach this...

2 months ago | 0

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Answered
Using parfor and external program via network
The problem is that GeckoCIRCUITS must not allow for multiple running instances. I glanced through their doc, but don't see any...

3 months ago | 0

Answered
how to use gpu in matlab online?
The issus is that you're running MATLAB on a machine that (most likely) doesn't haeve a GPU on it. You'll need to run MATLAB on...

3 months ago | 0

Answered
Problem with text output during parallel computation
I'm gathering from above that none of the jobs fail -- that if you were to look at the output before it's written, you would see...

3 months ago | 0

Answered
Fail to create more than 12 workers using parallel toolbox on linux (matlab R2019b)
Here are a couple of similar posts that might help https://www.mathworks.com/matlabcentral/answers/478171-parpool-consistent...

3 months ago | 0

Answered
How to create pool of workers from a list of hostnames?
This isn't feasible at this time; however, you might consider wrapping your code with batch. For example, let's assume your cod...

3 months ago | 0

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Answered
Build Simulink Real-Time Applications in Parallel
I'm not a Simulink expert, so I'm assuming that loading the workspace (which is the same for all?) will introduce, for example, ...

3 months ago | 0

Answered
Local parallel cluster profile validation createJob takes a very long time to run
Do you happen to have a local parallel pool already running, using all your cores, as you run your validation? I'm not sure whe...

3 months ago | 0

Answered
HPC Slurm --ntasks and Matlab parcluster NumWorkers question
In Slurm, a single task (i.e. MATLAB) can not run across multiple nodes. Let's look at a couple of options. MATLAB on a single...

3 months ago | 2

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Answered
Force all licenses checks at beginning of code in Azure Server
You can force a checkout for each toolbox with the license command % [TF errmsg] = LICENSE('checkout', FEATURE) checks out a ...

3 months ago | 0

Answered
How to make matlab use more CPUs
You need to provide more information on how you're running MATLAB on the server. Are you running through a scheduler (e.g. PBS)...

3 months ago | 0

Answered
How to restart a CommunicatingJob using only the MATLAB workspaces?
There's no automated process for reading the Job files and recreating the job. It'd be much easier to recreate the steps you've...

3 months ago | 1

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Answered
Is the installation same for 2020b MATLAB Parallel Server and regular matlab installation?
You can use the same installer, but you download and install a different binary, with its own license file. Two things: When i...

3 months ago | 1

Answered
Interrupt parfor from uiprogressdlg CancelRequested
I'm not entirely sure what you're hoping to have happen with the cancel, but I'll say that parfor can only be cancelled by Ctrl-...

3 months ago | 1

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Answered
AWS_Client, License manager_Server
There are two license options. network license (i.e. Flex, which sounds like what you're using) online licensing (enabled by a...

3 months ago | 1

Answered
Connecting to cluster fails: Algorithm negotiation fail
Please reach out to Technical Support (support@mathworks.com) and have them contact me about this. I recognize your cluster and...

4 months ago | 1

Answered
How to find function and variable value at each iteration for genetic algorithm with Parallel Computing ?
This doesn't address your issue, but you can't have a nested parfor loop/spmd block, which is in essense, what you're suggesting...

4 months ago | 0

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Answered
How I resume my Matlab job from previous saved data in NCI(Australian supercomputer facilities)?
My understanding is that NCI will allow for longer running jobs than 48 hours. Email help.nci.org.au for an exception on queue ...

4 months ago | 1

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Answered
Multi-level parallelization
MATLAB does not support multiple parallel pools in the same session. With that said, as you've pointed out, batch will do what ...

4 months ago | 0

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Answered
Error running MATLAB Parallel Server toolbox "Admincenter"
I would suggest contacting Technical Support (support@mathworkscom). They ought to be able to help with this and with your othe...

4 months ago | 0

Answered
How can I open a matlabpool in matlab2020?? Also, I have the parallel computing toolbox (PCT).
Not sure how far back ago, but we've deprecated the matlabpool command. Use the parpool command instead.

4 months ago | 0

Answered
Advice on cluster creation
Hi Mazen, I'm sorry to hear you're having issues installing and configuring MATLAB Parallel Server. I have two suggestions for...

5 months ago | 0

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