本文整理汇总了C++中mpi::Intracomm::Scan方法的典型用法代码示例。如果您正苦于以下问题：C++ Intracomm::Scan方法的具体用法？C++ Intracomm::Scan怎么用？C++ Intracomm::Scan使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类mpi::Intracomm的用法示例。
在下文中一共展示了Intracomm::Scan方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: getDofNumbering
/** \brief
* In many situations a rank computes a number of local DOFs. Then all
* ranks want to know the number of global DOFs and the starting
* displacment number of the DOF numbering in each rank.
*
* \param[in] mpiComm The MPI communicator.
* \param[in] nRankDofs The number of local DOFs.
* \param[out] rStartDofs Displacment of the DOF numbering. On rank n
* this is the sum of all local DOF numbers in
* ranks 0 to n - 1.
* \param[out] nOverallDofs Global sum of nRankDofs. Is equal on all
* ranks.
*/
inline void getDofNumbering(MPI::Intracomm& mpiComm,
int nRankDofs,
int& rStartDofs,
int& nOverallDofs)
{
rStartDofs = 0;
nOverallDofs = 0;
mpiComm.Scan(&nRankDofs, &rStartDofs, 1, MPI_INT, MPI_SUM);
rStartDofs -= nRankDofs;
mpiComm.Allreduce(&nRankDofs, &nOverallDofs, 1, MPI_INT, MPI_SUM);
}