Joss Knight
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Contribute at least one answer each month for 36 consecutive months
Awarded to Joss Knight on 03 Aug 2018
100 of your answers have been accepted
Awarded to Joss Knight on 19 May 2018
Answer 3 questions that were unanswered for more than 30 days
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Content Feed
Force CPU Parallel pool
You should use 'ExecutionEnvironment','cpu' for training on your local machine. This is multithreaded and will use all your core...
5 dagen ago | 2
Increrasing the validation accuracy
There's no way to do this automatically, but in your case just using the default 'OutputNetwork' setting ( last-iteration ) woul...
16 dagen ago | 0
gpu limit on 3070 with a simple CNN
You have 2-D data so you can't use a resize3dLayer. Use a resize2dLayer. But actually it doesn't look like that's what you want....
16 dagen ago | 0
| accepted
Indexing after knnsearch with GPU is slow
wait just asks the GPU to finish executing any pending operations, in this case, the call to knnsearch. Your previous timing cod...
18 dagen ago | 0
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How to fix the GPU warning?
It's all pretty clear from the documentation. Ampere cards are not supported in R2019a. You are using forward compatibility, whi...
22 dagen ago | 0
| accepted
ExecutionEnviroment problem on optimizer at traininOptions
It looks like you typed ExecutionEnviroment instead of ExecutionEnvironment (ie. you missed the second 'n').
25 dagen ago | 0
augmentedImageDatastore, understanding the flow of how it works
1) Yes 2) What is that 3rd dimension? Is this an index image? I think augmentedImageDatastore only understands grayscale and RG...
ongeveer een maand ago | 1
| accepted
What is different between AvailableMemory and FreeMemory?
Both are valid and supported, but FreeMemory was replaced many years ago by AvailableMemory as the documented way to determine h...
ongeveer 2 maanden ago | 0
Loadlibrary C library (dll) changing Matrix in place?
MATLAB is being exception safe and preserving your workspace by not silently modifying variables as a side effect. The only cert...
2 maanden ago | 0
| accepted
gpu memory cannot be released
This memory contains device binaries, i.e. program code, as well as workspace set aside for the CUDA libraries and not available...
2 maanden ago | 0
| accepted
sparse in cuda matlab shows bad performance
It is often slower. The problem is that sparse factorizations create dense matrices...basically, it's hard to parallelize. We...
3 maanden ago | 0
| accepted
Using multi-gpu in minibatchqueue
https://uk.mathworks.com/help/deeplearning/ug/train-network-in-parallel-with-custom-training-loop.html will show you how to use ...
3 maanden ago | 0
How to use multiple gpu on CGAN?
SPMD wraps the whole epoch loop. After you open it you partition the data and then start looping. See https://uk.mathworks.com/h...
3 maanden ago | 0
Memory increases on GPU while performing modification inplace
MATLAB cannot perform this operation in place because |data| is a workspace variable. MATLAB has no way of knowing there won't b...
3 maanden ago | 0
Frame per second computingfor GPU code generation
This is a smoothing filter to eliminate noise, to ensure it gives a good result from the first frame you could set it to |1/newt...
3 maanden ago | 0
| accepted
Error Message: Brace indexing is not supported for variables of this type. during TrainNetwork
You can definitely use your GPU on multiple MATLAB workers in an SPMD block. You should show your code, looks like you have a sy...
4 maanden ago | 0
Doesn't the GPU Coder support singleton expansion of ARRAYFUN?
Support for dimension expansion is actually restricted to the GPU version of arrayfun, and GPU Coder supports the CPU version's ...
4 maanden ago | 0
| accepted
From CPU code to GPU
You need to vectorize your code. The GPU is not intended for performing this kind of looping series of operations on scalar vari...
4 maanden ago | 0
I have a problem about " out of memory" for running VGG16 for image classification
It doesn't look as though you're setting the MiniBatchSize on the call to activations which means it's using the default value o...
4 maanden ago | 0
Error using gpuArray/subsasgn An unexpected error occurred during CUDA execution. The CUDA error was: CUDA_ERROR_LAUNCH_FAILED
What version of MATLAB are you using, what GPU and what platform? This sounds like a problem seen before with workstation 'Slee...
4 maanden ago | 0
predict fucntion in deep learning toolbox does not use gpu
That is the documentation for DAGNetwork, not dlnetwork. dlnetwork does not have an ExecutionEnvironment, it chooses its environ...
5 maanden ago | 0
What algorithm does matlab use when solving linear system A\b on GPU?
The same as for the CPU, MATLAB uses LU with pivoting for general square matrices and QR for general rectangular matrices. Perfo...
5 maanden ago | 0
| accepted
How to use lsqr with GPU?
solution = lsqr(@afun,gpuArray(b)); Or alternatively, move the data to the GPU inside your afun operation. The problem is, usin...
6 maanden ago | 0
Compatibility Matlab & GPU coder Compute Capability 8.6 RTX 3070
Regarding the gpuBench results: no, MATLAB is definitely not only using half the cores! What you are seeing is the raw performan...
6 maanden ago | 0
How much can a graphics card make a difference in neural networks?
Yes, it could make things run 10x faster maybe.
6 maanden ago | 0
| accepted
Can MATLAB ResNet50 be run on Google Colab Pro?
I'm not sure how in-guidelines it is to be asking about running Octave as a substitute for MATLAB on this forum! I'm pretty sure...
6 maanden ago | 1
BiCGStab is slower on R2021a using GPUs
There is a MATLAB bug report on this known issue: https://www.mathworks.com/support/bugreports/details/2438221 You should make...
7 maanden ago | 0
Optimization of loops with deep learning functions
dlconv is designed to work in batch with multiple input channels, multiple filters, and multiple input observations in a single ...
7 maanden ago | 0
| accepted
Is R2021a configured to automatically use Apple M1 chip for GPU and Neural Engine?
No. MATLAB only supports NVIDIA GPUs for computation.
8 maanden ago | 1
| accepted
Why is pagemtimes slower on GPU than a CPU?
This might be simply because you are running double-precision math on a device designed for single precision operations. gpuBenc...
8 maanden ago | 0
