我是 Unix 和 MPI 的初学者。对于串行程序，我通过输入make然后/directory/buildagain运行程序./runPR.sh values.txt。（values.txt仅包含该行Chain）

这是我的代码的一小部分。

 int main( int argc, char *argv[ ] )
 {
      if( strcmp(argv[1],"-PR") == 0 )
           runPR(argc-2, &argv[2]);
      return 0;
 }

 int runPR(int argc, char* argv[])
 { 
      cout<<"run here"<<endl;

      MPI_Status status;
      PetscMPIInt    rank,size;

      //bunch of code that assigns argv2 to include argv and some new strings and sets 
      //argc2=argc plus the  number of new string
      PetscInitialize(&argc2, &argv2,0,0);

      MPI_Comm_size(PETSC_COMM_WORLD,&size);
      MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
      PetscPrintf(PETSC_COMM_WORLD,"Number of processors = %d, rank = %d\n",size,rank);
      PetscSynchronizedPrintf(PETSC_COMM_WORLD,"synchronized rank = %d\n",rank);
      PetscSynchronizedFlush(PETSC_COMM_WORLD);//,PETSC_STDOUT);

      MPI_Barrier(PETSC_COMM_WORLD);

      PetscPrintf(PETSC_COMM_SELF,"[%d] Jumbled Hello World\n",rank);

      PROpt opt;
      Solve* ps = new Solve();

      PROpt opt;
      Solve* ps = new Solve();
      ps->getFile(&opt,argv[0]);
 }

通过键入mpirun -np 4 ./runPR.sh values.txt，我看到Number of processors = 1, rank = 0并 synchronized rank = 0打印了 4 次。但我没有看到synchronized rank = 1或 2 或 3 打印出来。为什么是这样？

这是run.PR.sh包含的内容

 DIR=/directory/buildagain/bin/Project
 FILELIST=$1

 while read FILE
 do
       echo "Processing ${FILE}..."
          ./makeInp.sh ${FILE} ${FILE} >INP/${FILE}.inp
      mpiexec -np 4 ${DIR} -PR INP/${FILE}.inp
 done < ${FILELIST}

编辑：我能够让 helloworld PETSc 示例在http://www.mcs.anl.gov/petsc/petsc-current/src/sys/examples/tutorials/ex2.c.html正常工作