All Questions
Tagged with parallelizationbugs
22 questions
6votes
1answer
210views
Precison of InterpolatingFunction decreases to MachinePrecision in ParallelTable
Bug introduced after 8.0.4, persisting through 14.1. Here is the code: ...
- 1,153
4votes
1answer
116views
Problem with labeled functions and ParallelEvaluate [duplicate]
Bug introduced in 8 or earlier and persisting through 14.0, Resolved in 14.1.0 I came across behaviour of ParallelEvaluate that I do not understand. In a loop I ...
- 958
3votes
1answer
78views
PatternTest vs Parallelization
Bug introduced in 10.0 or earlier and fixed in 11.2 Consider the following function ...
- 352
15votes
2answers
393views
DistributeDefinitions is evaluating the definitions, and this only for a large number of definitions
Bug introduced in 8 or earlier and persisting through 13.0.1 I am using Mathematica 11.3 and this seems to me to be a bug. I would like, if possible, some idea on a workaround. Here is an example of ...
- 671
10votes
1answer
151views
Parallelize[MapIndexed[...,Association[...]]] returns broken result
Bug introduced in 10.0.2 or earlier and persisting through 12.0 Confirmed: CASE:4041910 Consider the following example: ...
- 34.5k
7votes
1answer
198views
AbortKernels, CloseKernels may crash Mathematica
Let us start with a variant of an example in the documentation of AbortKernels. We launch four subkernels: LaunchKernels[4]; ...
- 10.3k
12votes
2answers
293views
Surprising interaction of DistributeDefinition and ParallelNeeds in 11.3
Bug introduced in 11.3.0 and persisting through 12.1.1 (CASE:4039452) I believe I am seeing a new sort of behavior around some parallel functionality in Mathematica 11.3, because code that used to ...
- 18.7k
9votes
1answer
186views
Association lookup in sub-kernel seems slow
While developing a parallel version of some code, I noticed that looking up an item in an association seemed much slower than in the serial version of the code. To show the effect, I created the ...
- 423
9votes
1answer
123views
What's with the weird HoldRest Attribute of ParallelMap?
Bug introduced in 10.0 or earlier and persisting through 11.1. Fixed in 13.2.0 or earlier I have noticed some odd behavior of ParallelMap: When the list, that is ...
- 131
7votes
1answer
240views
How can multiple kernels update a shared Association object?
In the examples below, the variable status is an Association object that is supposed to be shared by three concurrent kernels. ...
- 11.8k
38votes
1answer
1kviews
Parallelize Map and ParallelMap
Bug introduced in 8.0 and fixed in 11.2 It is stated in the documentation that Parallelize[Map[f, expr]] is equivalent to ...
- 667
7votes
0answers
257views
Bug: Calling `SetSharedVariable` while kernels are running hangs them up/crashes them
Bug introduced in 9.0 or earlier and persisting through 11.0.1 or later Start a fresh kernel Quit, and maybe launch ...
- 5,799
8votes
1answer
412views
Export bug in combination with ParallelTable?
I am programming with Mathematica 10.3.1.0 on Windows 10 Professional 64 Bit and have an i7-4940-MX 3,1 GHz processor (4 cores). When I use in the example code below ...
- 11.8k
5votes
1answer
340views
memory leaks using NIntegrate on parallel kernel
Bug fixed in version 10.2.0 I'm running a large computation in parallel and the memory usage of the parallel kernels is increasing with every iteration of the calculation. Neither ...
- 51
3votes
1answer
180views
