slides - Spring School in Advanced Computing TACC @ UP

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Hybrid Coding include ‘mpif.h’  program hybsimp  Fortran  C  #include   int main(int argc, char **argv){   int rank, size, ierr, i;   call MPI_Init(ierr)   call MPI_Comm_rank (...,irank,ierr)   call MPI_Comm_size (...,isize,ierr)  ! Setup shared mem, comp. & Comm  !$OMP parallel do      do i=1,n               enddo  !  compute & communicate   call MPI_Finalize(ierr)   end   ierr= MPI_Init(&argc,&argv[]);   ierr= MPI_Comm_rank (...,&rank);   ierr= MPI_Comm_size (...,&size);  //Setup shared mem, compute & Comm  #pragma omp parallel for      for(i=0; i
MPI Call through Master • MPI_THREAD_FUNNELED • Use OMP_BARRIER since there is no implicit barrier in master workshare construct (OMP_MASTER). • All other threads will be sleeping. 19
Page 1 and 2: Hybrid Computing Lars Koesterke Uni
Page 3 and 4: Why Hybrid? (cont 1) • Only profi
Page 5 and 6: Node Views CPU OpenMP CPU CPU CPU C
Page 7 and 8: NUMA Operations • Ways Process Af
Page 9 and 10: Modes of MPI/Thread Operation • S
Page 11 and 12: SMP Nodes Hybrid Batch Script 16 th
Page 13 and 14: SMP Sockets Hybrid Batch Script 4 t
Page 15 and 16: MPI with OpenMP -- Messaging Single
Page 17: Syntax: MPI2 MPI_Init_thread call M
Page 21 and 22: MPI Call within Single • MPI_THRE
Page 23 and 24: Overlapping Communication and Work
Page 25 and 26: Thread-rank Communication • Can u
Page 27 and 28: NUMA in Code • Scheduling Affinit
Page 29 and 30: Conclusion • Placement and bindin

slides - Spring School in Advanced Computing TACC @ UP

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