Edric Ellis
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Content Feed
Force CPU Parallel pool
There's no direct way to specify this using trainingOptions, but what you can do is disable the GPUs on the workers by running t...
3 days ago | 0
How to use libpointer inside parfor loop?
I think you should be able to do this using parallel.pool.Constant. I think you might need 2 of them in fact - one to manage the...
9 days ago | 0
Parfeval, Backgroundpool and Webread
Unfortunately, as you suspect, right now the only way to do this is to use a process pool via parpool('local') or similar.
10 days ago | 0
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How to specify GPU devices for parallel computing using "parfor"?
The documentation here describes how you might do this in general. Things get a little more complicated if you want to run more ...
1 month ago | 1
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pass Python object as argument to function in "parfeval"
One of the limitations of the MATLAB->Python support is that Python objects cannot be serialized. parfeval (and other parallel c...
2 months ago | 0
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decomposition in parfor failure
Unfortunately, I think you're hitting the sort of problem that was mentioned in this answer to the question you linked to - the ...
2 months ago | 1
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How can an infinitely running worker be gracefully terminated?
The simplest way to fix this is to use onCleanup to ensure that your fclose statement is executed. This is good practice anyway,...
2 months ago | 1
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How exactly does MATLAB calculate a sum of array elements by its sum() function? Does it use any compensated summation algorithm such as Kahan?
The outtype parameter to sum controls the numeric type used for summation, described in the doc. The default is that sum on sing...
2 months ago | 0
How to slice these variables?
I think what you're trying to do is something like this, which doesn't work: N = 4; out = zeros(N, 3); try parfor idx = ...
2 months ago | 0
How to store 2D arrays in a for loop inside a parfor loop?
I think you can do this simply by essentially "reshaping" the problem to satisfy the parfor requirement that the index expressio...
3 months ago | 0
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Passing a Global Variable to arrayfun for gpuArray
You can do this by using a nested function and variables in the containing parent workspace instead of global variables. Here's ...
3 months ago | 1
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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...
3 months 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))...
3 months ago | 0
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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.
4 months 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...
4 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...
5 months ago | 0
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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...
5 months ago | 0
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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...
5 months ago | 0
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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...
5 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 ...
6 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.
6 months ago | 1
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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...
7 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...
7 months ago | 0
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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...
7 months ago | 1
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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...
7 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...
7 months ago | 0
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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 ...
7 months ago | 0
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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...
7 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...
7 months ago | 0
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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...
8 months ago | 0
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