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Raymond Norris

MathWorks

Last seen: Today Active since 2003

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Answered
Unable to submit task result (Matlab parallel server)
Hi Maria, A few questions first: Which platform is MATLAB Parallel Server running on, Linux or Windows? Which scheduler are y...

3 days ago | 0

Answered
parfor loop: random samples are dependent
See if these help https://www.mathworks.com/help/parallel-computing/control-random-number-streams-on-workers.html https://www....

5 days ago | 0

Answered
How to use parfor with a range from a very large object and cause memory problems
Have you considered assigning R in the parfor? parfor t = 1:T R = rand(T,S,P,M) ... end It's less intuitive for MAT...

17 days ago | 0

Answered
Troubles with counter variables and file writings in parallelized for loop
For Problem 1, use a parallel.pool.DataQueue https://www.mathworks.com/help/parallel-computing/parallel.pool.dataqueue.html In...

17 days ago | 0

Answered
How can I get parallel computing toolbox?
Best to contact Technical Support (support@mathworks.com). They'll be able to explain your options.

21 days ago | 0

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Answered
Can't find file on worker - Parallel Programming
You mean to say that folder is empty? At the top of the spmd, add this spmd getAttachedFilesFolder hydroNet.NetworkF...

24 days ago | 0

Answered
Error when executing MATLAB app methods via parfeval and BackgroundWorker pool.
Do you have the Parallel Computing Toolbox? If so, try using a process-based pool (i.e., 'local') instead of a backgroundPool. ...

24 days ago | 0

Answered
Cleaning parallel workers messages appears just immediately after running simulations when using parsim
I'm not a Simulink user, so bare with me in case I take you down the wrong path. I'm guessing you are setting the parsim RunInB...

25 days ago | 0

Answered
How to make a multiple for-loop run faster, the function of which is to find the steady state?
Yuu ought to be able to change the last several lines as such end temp(m,1) = rmsep; end rmse = temp; With that sai...

26 days ago | 1

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Answered
How to make a multiple for-loop run faster, the function of which is to find the steady state?
Can you elaborate a bit on the following: how are you measuring the time (walltime, tic/toc, profiler) how long it took to run...

27 days ago | 1

Answered
Why is parallel poor button still gray and showing "No parallel poor" even already started?
It might be a bug that the icon isn't reflecting the state of the parallel pool properly. Nevertheless, I'm assuming you can ru...

1 month ago | 0

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Answered
how to use fsolve in a parfor loop to reach a correct answer?
It shouldn't matter, but what is UseParallel option set to? You're using parfor and then is fsolve also using parfor (which res...

1 month ago | 0

Answered
How to use the parfor function inside a for loop?
There's a bit of missing code here and some of it doesn't make quite sense, so I might be off on my solution. And, I'm going to...

1 month ago | 0

Answered
"parfeval" and "backgroundPool" to create background progress bar
There are a couple of issues parfeval requires other input arguments and you need to pass in the function handle to DBWaitGUI2....

2 months ago | 0

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Answered
Could not load Matlab parallel parpool.m in a C# wrapper
What is line #14 in driver_evaluate_callibration? And have you been able to successfully run this in MATLAB (not compiled)?

2 months ago | 0

Answered
How to run Simulink and Matlab script run sequentially.
How are you running the Simulink model, interactively or with the sim command? If you run the model with the sim command, that ...

2 months ago | 0

Answered
Is it possible to assign specific nodes in a batch job?
I'm gathering you're using the MATLAB job scheduler (MJS). If so, then no, MJS doesn't provide a way to specify which node(s) t...

2 months ago | 0

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Answered
Parallel Computing Toolbox - Limit of number of workers - R2021a
Based on what your stating, I'm gather it's a single motherboard, with 32 sockets, each socket with 4 physical cores. Is that r...

2 months ago | 0

Answered
Using parfor eliminates use of multithreading
Check the cluster objects' NumThreads property. For instance local = parcluster('local'); local.NumThreads = <set-number-of-th...

2 months ago | 2

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Answered
Transparency violation error for cvx
It doesn't appear so. cvx_begin is calling assignin on line 41. This would be akin to calling local = parcluster('local'); p...

2 months ago | 0

Answered
Worker unable to find mex file
I'm assuming you are using parpool? How are you setting the worker's path on the Linux cluster to find the MEX-file? One optio...

2 months ago | 0

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Answered
Specify the parallel pool job timeout
So you doing something like the following cluster = parcluster; job = cluster.batch(@mycode,...., 'Pool',size); Then what you...

2 months ago | 0

Answered
Restriction of functions run under parfeval
fprintf isn't inactive/not working, as much backgroundPool doesn't capture the "diary" of parfeval. This has the same behaviour...

2 months ago | 0

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Answered
Please suggest me to write the parallel loop in MATLAB without the workers getting aborted during the course of execution? Thanks
The entire pool idles out, not a single worker. My guess is that a worker is crashing because of memory. Tell us a bit more t...

2 months ago | 0

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Answered
Parallel pool hangs on startup for all versions of Matlab
Not sure why this would happen with every version of MATLAB. First try clearing out all the job files (this will destroy past j...

2 months ago | 0

Answered
parfor slower than for
There are several considerations How many dedicated workers? Most often, more workers, the lower the amount of time. Amount of...

3 months ago | 0

Answered
unrecognized function or variable in parfor
I don't have much time to look at this closer, so I'll give a couple of quick thoughts For starters, I would suggest going thro...

3 months ago | 1

Answered
Parallel pool error, automatically clear jobstoragelocation
Look at my answer here for an option: https://www.mathworks.com/matlabcentral/answers/1440039-how-to-prevent-parpool-error#answe...

3 months ago | 1

Answered
How to use All cores
To increase the number of permissible local workers, you could run local = parcluster('local'); local.NumWorkers = 44; pool =...

3 months ago | 0

Answered
How can i run multiple callback functions based on a single event?
If you have the Parallel Computing Toolbox, then this might not be exactly what you're looking for, but it might get you started...

3 months ago | 0

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