#include "petscsys.h" PetscErrorCode PetscSequentialPhaseBegin(MPI_Comm comm,int ng)Collective on MPI_Comm
|comm||- Communicator to sequentialize.|
|ng||- Number in processor group. This many processes are allowed to execute at the same time (usually 1)|
PetscSequentialPhaseBegin(comm, 1); <code to be executed sequentially> PetscSequentialPhaseEnd(comm, 1);
Often, the sequential code contains output statements (e.g., printf) to be executed. Note that you may need to flush the I/O buffers before calling PetscSequentialPhaseEnd(). Also, note that some systems do not propagate I/O in any order to the controling terminal (in other words, even if you flush the output, you may not get the data in the order that you want).
Index of all Sys routines
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