Edric Ellis
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Content Feed
Parallel pool constant with a parfor and for loop
Yes, parallel.pool.Constant is generally most useful when there are multiple parfor loops. (There are other use-cases such as wh...
11 days ago | 0
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How do I use SatelliteScenario Groundstation objects inside of a Parallel Computing Toolbox parfor loop
Thanks for reporting this problem. You can work around this for now like so: fetchOutputs(parfevalOnAll(@() delete(figure), 0))...
11 days ago | 0
| accepted
How to create interleaved complex from real gpuArray in mex?
Yes, complex mxGPUArray data is always stored in interleaved-complex format, see this doc page for details.
19 days ago | 0
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Fill structure in parallel loop
The main constraint here is the parfor "sliced output" requirement. Basically you cannot directly update a single struct using p...
2 months ago | 0
How can i use GPU Computing for Besselk & Besseli function and integral ？
Unfortunately, the Bessel functions are not yet supported on the GPU, so there is no straightforward workaround for this part. I...
2 months ago | 0
| accepted
parallel processing for readtable function
You've manually disabled the AutoCreate for parallel pools - I presume you're manually creating a pool with a separate parpool s...
2 months ago | 0
| accepted
How to limit the usage of GPU to only one parallel worker?
You could perhaps do something like this. This assumes your code is running in a parallel pool, and that you have only 1 GPU. s...
2 months ago | 0
| accepted
Error: Unable to classify a variable in the body of the parfor - loop
This doesn't work as written because the indexing form into pos doesn't meet the requirements for a "sliced" variable. The simpl...
3 months ago | 2
| accepted
Shared variable / memory usage / parfor
The workers in a "local" parallel pool (the default) are separate processes. Therefore each worker process must have a complete ...
3 months ago | 1
What's the proper way to handle GPU related matlab functions in a compiled app that might run on a computer without a supported GPU
You can use canUseGpu to check if a GPU is available. If one is not, then your code needs to not create any gpuArray data.
3 months ago | 1
| accepted
Parfor loop with 4 workers is more than 4 times faster than the for loop, how is it possible?
Without seeing some code that demonstrates this, we can only speculate. One possibility is that the code transformations require...
4 months ago | 0
Matlab parfor uses fewer cores than the allocated number of cores
I bet your parallel pool is timing-out in between your parfor loops. It then gets auto-created with size 12, as that is the defa...
4 months ago | 0
| accepted
How to use parpool worker again, after it times out?
As @Walter Roberson says, if the wait call times out and you don't want the result, you must use cancel to stop execution. So yo...
4 months ago | 1
| accepted
Having the error , " the parfor loop cannot run due to the way variable is used".
The parfor implementation thinks you're doing something order-dependent involving a (and b). Here's an example with a similar er...
4 months ago | 0
How to handle Complex input in MEX gateway function in CUDA?
Firstly, as per the doc page for interleaved complex data, you need to add the command-line flag -R2018a to use mxGetComplexDoub...
4 months ago | 0
| accepted
MATLAB Job Scheduler job storage location
If you're referring to the JobStorageLocation property of the parallel.Cluster object you get back from parcluster - you do not ...
4 months ago | 0
| accepted
Matlab and SPICE toolkit and parfor
I know nothing about SPICE, but at a guess, you probably need to initialise SPICE on the workers. I would try adding fetchOutpu...
5 months ago | 0
Is it possible to build a parfor loop where workers share and edit (only) one variable array?
If I've understood correctly, you could use spmd to do something like this. spmd allows communication between the workers, so th...
5 months ago | 0
| accepted
How can I run my own CUDA code?
To call the kernel, you must first set up the ThreadBlockSize and GridSize properties of k. See this page for more https://www.m...
5 months ago | 0
| accepted
How much parallelism can I get out of 32 workers?
If your workloads are amenable to MATLAB's intrinsic multi-threading, then you could run 32 multithreaded workers, each of which...
5 months ago | 1
Parallel Computing Maximize CPU Usage
There are several reasons why parfor may not be able to do a perfect job of speeding up your calculation. These basically boil d...
5 months ago | 0
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Is it possible to control two Arduino boards in parallel using parfor?
As @Walter Robersonpoints out, you need to create the arduino objects directly on the workers. Rather than using parfevalOnAll t...
6 months ago | 0
Can't use gpuArray with melSpectrogram
gpuArray support for melSpectrogram was added in R2020a. See the release notes.
6 months ago | 1
| accepted
how to Parallize independent jobs
It's not clear why you think parfor is not suitable for this case without showing us what you tried and why it doesn't work for ...
6 months ago | 0
Use Parfor on a greenscreen picture
The comment on your question by @Daniel Pollard is probably the most productive way forward. But to answer your parfor query spe...
6 months ago | 0
| accepted
How to resolve indexing the sliced variable error in the case of for nested with parfor?
The problem here is that the inner loop bounds must be a constant - basically this means that you must compute it outside the pa...
6 months ago | 0
Running into "not enough input arguments" error when using parfeval on a linux machine (works fine on Mac OSX).
Without reproduction steps that we can try, we can only speculate as to what's going wrong here. My guess is that you aren't pro...
6 months ago | 0
Tall arrays are not allowed to contain data of type struct
Your code was so nearly working. I made two tiny changes, marked with %###: %% Setup nRowLimit = 100; % Number of records in ...
6 months ago | 0
| accepted
Parfor in Parallel Computing
The run function does not work with scripts containing parfor loops. Simply invoke the script directly by name. If the script is...
6 months ago | 0
How to set timeout to a function
You could use parfeval to do this, but I'm not sure how you might fit that in with the rest of your parpool usage. Here's the si...
6 months ago | 1
| accepted
