PetscOmpCtrlOmpRegionOnMasterBegin#

Mark the beginning of an OpenMP library call on master ranks

Synopsis#

#include "petscsys.h"  
PetscErrorCode PetscOmpCtrlOmpRegionOnMasterBegin(PetscOmpCtrl ctrl)

Input Parameter#

  • ctrl - a PETSc OMP controller

Note#

Only master ranks can call this function. Call PetscOmpCtrlGetOmpComms() to know if this is a master rank. This function changes CPU binding of master ranks and nthreads-var of OpenMP runtime

See Also#

PetscOmpCtrlOmpRegionOnMasterEnd(), PetscOmpCtrlCreate(), PetscOmpCtrlDestroy(), PetscOmpCtrlBarrier()

Level#

developer

Location#

src/sys/utils/mpishm.c


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