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我想使用MPI在机器之间发送矩阵。以下是我的测试代码如何使用MPI将Eigen :: MatrixXd中的数据发送给我
#include <iostream>
#include <Eigen/Dense>
#include <mpi.h>
using std::cin;
using std::cout;
using std::endl;
using namespace Eigen;
int main(int argc, char ** argv)
{
MatrixXd a = MatrixXd::Ones(3, 4);
int myrank;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
MPI_Status status;
if (0 == myrank)
{
MPI_Send(&a, 96, MPI_BYTE, 1, 99, MPI_COMM_WORLD);
}
else if (1 == myrank)
{
MPI_Recv(&a, 96, MPI_BYTE, 0, 99, MPI_COMM_WORLD, &status);
cout << "RANK " << myrank << endl;
cout << a << endl;
}
MPI_Finalize();
return 0;
}
它编译成功,没有错误,但是当我启动它时,它返回以下错误。
$ MPI mpiexec -n 2 ./sendMatrixTest
RANK 1
[HPNotebook:11633] *** Process received signal ***
[HPNotebook:11633] Signal: Segmentation fault (11)
[HPNotebook:11633] Signal code: Address not mapped (1)
[HPNotebook:11633] Failing at address: 0xf4ba40
--------------------------------------------------------------------------
mpiexec noticed that process rank 1 with PID 11633 on node HPNotebook exited on signal 11 (Segmentation fault).
--------------------------------------------------------------------------
我该如何解决?谢谢!
序列化的矩阵,并将其发送? –
而不是像'int'那样简单地发送一个'eigen'矩阵并开始工作。一个'eigen'矩阵是一个像'std :: vector'一样的容器。随之而来的是大量的信息。这里是一个例子http://stackoverflow.com/questions/36021305/mpi-send-struct-with-a-vector-property-in-c – Matt