petsc-current/docs/manualpages/Vec/VecScatterCreateToAll.html Il 05 Giu 2017 4:12 PM, "Francesco Migliorini" < francescomigliorin...@gmail.com> ha scritto:
> Hello there! > > I am working with an MPI code in which I should create a petsc vector such > that all the processes can access to all its entries. So, I tried with > VecCreateShared but it does not work with my machine. Then I tried > VecCreateMPI but it seems to me that it does not change anything from the > usual VecCreate. Finally I found the scatter commands but the examples are > a bit tricky. So, are there any other way? If no, could someone please show > me how to use scatter in this simple code? > > Vec feP !The vector to be shared with all the processes > (...) > mpi_np = 2 !The number of processes > ind(1) = 10 !The global dimension of the vector > call VecCreate(PETSC_COMM_WORLD,feP,perr) > call VecSetSizes(feP,PETSC_DECIDE,ind,perr) > call VecSetFromOptions(feP,perr) > (...) !Here feP is filled in > call VecAssemblyBegin(feP,perr) > call VecAssemblyEnd(feP,perr) > > Many thanks, > Francesco >
