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Here is a minimal working c++ example to show what I mean: #include <sched.h> #include <iostream> #include <sstream> #include <omp.h> int main(int argc, char** argv) { #pragma ...
1 vote
2 answers
171 views

OpenMP uses its own scheme for numbering threads staring from 0 for the master thread. A master thread is the thread that initiated a parallel region, which is the main program thread in the following ...
-1 votes
0 answers
51 views

I am running a straightforward parallelized computation using RcppEigen and OpenMP. Here is a minimal reproducible example of the code: // [[Rcpp::depends(RcppEigen)]] // [[Rcpp::plugins(openmp)]] #...
2 votes
1 answer
150 views

Consider the following code: #pragma omp parallel for (int run = 0; run < 10; run++) { std::vector<int> out; #pragma omp for for (int i = 0; i < 1'000'000; i++) { ... } } ...
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3 replies
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I'm struggling to finalise the design of my C++17 library. One of the primary goals is to use runtime polymorphism to allow users to extend or rewrite default features of the library for their own use ...
2 votes
1 answer
142 views

I'm one of the developers of the Lumen code: https://www.lumen-code.org/. That is computational code for condensed matter physics simulations. We are replacing FORALL with DO CONCURRENT, since FORALL ...
0 votes
1 answer
97 views

the code below crashes with terminate called after throwing an instance of 'std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >' Aborted ...
1 vote
1 answer
118 views

So i'm working on some homework related to fixing som buggy code when i ran into an interesting problem. I don't think it was one of the indended bugs because the lecturer was confused by it as well. ...
3 votes
2 answers
193 views

I am optimising a code already parallelised but not very optimised because of the very different duration of operations among the threads, even though all threads have a similar task to do. So I ...
0 votes
0 answers
96 views

I'm working on porting the CAMB (Cosmological Boltzmann code) to run with hybrid CPU+GPU parallelization using OpenMP and OpenACC with NVIDIA HPC SDK compilers. The code works perfectly when compiled ...
0 votes
0 answers
86 views

I'm developing an Android app using the NDK that plays MIDI files with FluidSynth, integrated with a Java frontend. The app crashes with a native crash in libomp.so at __kmpc_barrier, and I suspect it'...
3 votes
2 answers
130 views

I have written some programs with OMP reduction directive in Fortran and in C. But the data types were simple (int, float, arrays with fixed size, ...) and reduction-identifiers used were implicitly ...
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2 votes
3 answers
112 views

We are working with the following code: int i, j, k; for (i = 2; i < n; i++){ // S1 for (j = 3; j < n - 3; j++){ // S2 for (k = 4; k < n - 4; k++){ // S3 A[...
1 vote
1 answer
150 views

I am currently trying to porting a big portion of a Fortran code to GPU devices with OpenMP. I have a working version for AMD, specifically for the MI300A which features unified shared memory. I ...
1 vote
1 answer
167 views

My program needs to perform some heavy calculations on all widgets in the box. The calculations are repeated an appreciable number of times processing multiple variations of each widget. All of the ...

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