openmp

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Are the indices in an OpenMP loop processed in ascending order?

Consider the following OpenMP for loop: #pragma omp parallel for schedule(dynamic) for (int i = 0; i < n; ++i)[详细]

2023-03-11 00:24 分类：问答
How a recent version of GCC (4.6) could be used together with Qt under Mac OS?

My problem is related to the one discussed here: Is there a way that OpenMP can operate on Qt spanwed threads?[详细]

2023-03-10 23:10 分类：问答
OpenMP - Iterator in the For-loop

#pragma omp parallel for reduction(+ : numOfVecs) for(itc=clus.begin() ; itc!=clus.end() ; itc++) { numOfVecs += (*itc)->getNumOfVecs();[详细]

2023-03-10 22:39 分类：问答
OpenMP - Variable declarations in for loops

I\'m trying to adapt a normal code to a parallel one. When I make a for loop parallel, which has some variables declared inside of it, are those variables private or shared?[详细]

2023-03-10 22:24 分类：问答
dot product of complex vectors with openMP

I\'m using a version of openMP which does not support reduce() for complex argument. I need a fast dot-product function like[详细]

2023-03-10 22:04 分类：问答
Parallel Sum for Vectors

Could someone please provide some suggestions on how I can decrease the following for loop\'s runtime through multithreading? Suppose I also have two vectors called \'a\' and \'b\'.[详细]

2023-03-10 17:34 分类：问答
Using OpenMP to calculate the value of PI

I\'m trying to learn how to use OpenMP by parallelizing a monte carlo code that calculates the value of PI with a given number of iterations. The meat of the code is this:[详细]

2023-03-09 08:02 分类：问答
OpenMP C++ parallel performance better dualcore laptop than eight cores cluster

First of all, OpenMP obviously only runs in one of the motherboards in the cluster, in this case each motherboard has two quad-core Xeons E5405 at 2GHz and its running Scientific Linux 5.3 (released i[详细]

2023-03-08 21:44 分类：问答
how to use orphaned for loop in OpenMP?

SOLVED: see EDIT 2 below I am trying to parallelise an algorithm which does some operation on a matrix (lets call it blurring for simplicity sake). Once this operation has been done, it finds the big[详细]

2023-03-07 06:43 分类：问答
How to see the code generated by the compiler for OpenMP constructs

If I have a program that uses OpenMP, is there a way I can see the transformed code generated by the compiler, that is the code the compiler actually compiles. Actually I\'m interested in seeing what[详细]

2023-03-06 19:39 分类：问答