Community Profile

photo

Edric Ellis

MathWorks

Last seen: Today 2011 以来アクティブ

Developer at MathWorks, working on Parallel Computing Toolbox. Professional Interests: parallel computing, distributed arrays, gpu

Statistics

All
  • 5-Star Galaxy Level 3
  • Personal Best Downloads Level 1
  • First Review
  • First Submission
  • 36 Month Streak
  • Thankful Level 1
  • Guiding Light
  • Revival Level 2
  • Knowledgeable Level 5
  • First Answer
  • Solver

バッジを表示

Content Feed

回答済み
Incompatible indexing of variable for parfor
The total size in bytes of Network is 5*12*76*8 = 36480. That is tiny. Ignore the parfor "broadcast" warning - that is intended ...

1日 前 | 0

回答済み
Minimum/maximum CUDA Toolkit requirement for R2022a
To run code using gpuArray, you do not need to install a CUDA Toolkit. You only need a CUDA driver. You should always* install t...

24日 前 | 0

回答済み
Is there an easy way to find out which workers are running on the same host in a Generic Cluster job so I can efficiently allgather?
You can use gop to perform general MPI-style all-reduce operations, and a special case of that is gcat which can operate as an M...

29日 前 | 0

| 採用済み

回答済み
Unsure why parfor loop does not work in this case
The problematic variables appear to be both M and P. For M, you have multiple different "reads" from the variable after the init...

約1ヶ月 前 | 0

回答済み
Writing to .mat simultaneously with parfor loop
Don't attempt to save from multiple workers to the same file, this will sometimes fail (exactly when/how it fails depends on you...

約2ヶ月 前 | 2

| 採用済み

回答済み
SPMD to process different iteration on different worker
It's not entirely clear to me quite what you're after. You might want for (drange) which spreads the iterations of a for loop ov...

約2ヶ月 前 | 0

回答済み
process based parpool: keep the data in the workers
Mike has already suggested looking at parfeval. The other option, which may be appropriate for your problem is to use spmd. This...

2ヶ月 前 | 0

| 採用済み

回答済み
GUI program with parfeval
You should be able to cause the GUI to update by using wait in a loop, together with drawnow. A bit like this: while ~wait(thre...

2ヶ月 前 | 0

| 採用済み

回答済み
Parfor loops indexing into table rows
There's a few things conspiring against you here. Firstly, parfor analysis doesn't understand how to "slice" table data using va...

2ヶ月 前 | 1

| 採用済み

回答済み
Discarded Messages with SPMD and labReceive ... why?
Using conditional receives in this way is not a robust way to get the workers to collaborate - you have an ordering problem that...

2ヶ月 前 | 0

回答済み
How to set a background pool to process-based instead of thread-based
Unfortunately, as you have seen fopen is not yet supported on thread-based pools such as backgroundPool. There is no way to conf...

3ヶ月 前 | 0

| 採用済み

回答済み
parfeval with fetch not working
You cannot pass database connection objects to workers directly like this. You should use createConnectionForPool . There are ex...

3ヶ月 前 | 2

| 採用済み

回答済み
How to select GPU when doing thread-based parallel?
Unfortunately, spmd is indeed not yet supported for thread-based pools. Until it is, you can do something like the following to ...

3ヶ月 前 | 1

| 採用済み

回答済み
Segmentation error during parfor loop (remote linux server)
The crash dump suggests the workers are crashing inside ipqpdense. This problem should be fixed if you upgrade to R2020a or late...

3ヶ月 前 | 0

回答済み
Why does the number of workers decrease while running parfor?
The number of workers in a local parallel pool decreases like this only when one of the worker processes terminates (i.e. crashe...

3ヶ月 前 | 0

回答済み
valid indices in a parfor loop
There are a couple of ways to work around this. You can either unroll the inner loop, or else make the output matrix 3d so that ...

4ヶ月 前 | 0

回答済み
Using public class methods and libraries in parfeval()
I suspect the problem here is that when you transfer instances of your ADXL372 class to the workers, they are not getting set up...

4ヶ月 前 | 0

| 採用済み

回答済み
error running lines with parallel computing toolbox,
I suspect you're running MATLAB in a -nodisplay mode, and somwhere inside the code you're using, ParforProgMon is not equipped t...

4ヶ月 前 | 0

回答済み
Is there a built-in function to validate a class property that should be a cell array?
Rather than a validator, you could perhaps just use the class specification? (In my code below I'm using a function with an argu...

4ヶ月 前 | 1

| 採用済み

回答済み
Parallel pool on function that uses persistent variables
As Walter points out, workers (either threads or processes) do not share persistent variable workspaces. I too cannot find this ...

4ヶ月 前 | 0

回答済み
What can I do/try to make MATLAB release the GPU after a GPU runtime error?
Use this: reset(gpuDevice)

4ヶ月 前 | 1

回答済み
Difference between debug parfor loop and run it
Further to Walter's answer, parfor assumes that anything that is not statically provable to be a variable reference must be a fu...

4ヶ月 前 | 1

| 採用済み

回答済み
Error: Unable to classify a variable in the body of the parfor-loop
The problem here is that you've got two different accesses to the variable out. On line 7, you have the valid sliced indexing ex...

4ヶ月 前 | 2

回答済み
proper use of DataQueue and PollableDataQueue inside of App Designer class?
In this case, the problem is not with your DataQueue - it's actually with the function handle you're passing in to parfeval. The...

4ヶ月 前 | 1

| 採用済み

回答済み
How does an active parpool influence serial / threaded mex computation? (runtime/memory)
Simply: an idle parpool should be doing nothing very much other than sitting there consuming some memory. It should consume only...

4ヶ月 前 | 1

| 採用済み

回答済み
Separating subtables from a larger table by using the variable values in a column
Rather than looping, you might be able to use findgroups and splitapply to do what you need. Imagine you wish to compute the max...

4ヶ月 前 | 1

| 採用済み

回答済み
Shared memory in parfor genetic algorithm
If you're using R2022a or later, you could use ValueStore to allow workers to share values. The main requirement here is for you...

5ヶ月 前 | 1

| 採用済み

回答済み
How to input global variables in function that is in parloop?
Another option is to use parallel.pool.Constant to arrange for the data to be loaded and then accessed. This can be a bit simple...

5ヶ月 前 | 1

回答済み
How to change the parameter in Mask and run the simulation parallel
Given a simple model like this which has a mask with a parameter named gain_val You need to do something like this: mdl = 'm...

5ヶ月 前 | 1

回答済み
Setting up parallel computations for a single dataset, as opposed to spmd
This is precisely the sort of thing that parallel.pool.Constant was designed for. You build a Constant once on the client, the d...

5ヶ月 前 | 0

| 採用済み

もっと読み込む