petsc-main 2021-04-20
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Sorts an array of integers in place in increasing order and reorders a second array to match the first.


#include "petscsys.h"  
PetscErrorCode PetscMPIIntSortSemiOrderedWithArray(PetscInt n, PetscMPIInt arr1[], PetscMPIInt arr2[])
Not Collective

Input Parameters

n - number of values
arr1 - array of integers to be sorted
arr2 - array of integers to be reordered

Output Parameters

arr1 - sorted array of integers
arr2 - reordered array of integers


The arrays CANNOT overlap.

If the array to be sorted is less than 64 entries long PetscSortMPIIntWithArray() is automatically used.

This function serves as an alternative to PetscSortMPIIntWithArray(). While this function works for any array of integers it is significantly faster if the array is not totally random. There are exceptions to this and so it is __highly__ recomended that the user benchmark their code to see which routine is fastest.

See Also

PetscTimSortWithArray(), PetscSortMPIIntWithArray(), PetscSortMPIIntWithPermutation()




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