[petsc-users] Is there any method to call multiple mpi run inside program

[张国熙]

Hi, all

I use SLEPc as part of my program, which means I compile it as .so library.

I want my program work like this: execute serially, reach Point A, parallel
solving, then serially again.

I know I could use mpirun -np 4 in terminal to call the whole program, but
this will let the serial part be executed 4 times. What I want is only call
mpi at the eigensolving part.
Is there any function that could achieve something like that?

Thanks a lot.
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