1PetscSF Object: 4 MPI processes 2 [0] Number of roots=3, leaves=2, remote ranks=2 3 [0] 0 <- (3,1) 4 [0] 1 <- (1,0) 5 [1] Number of roots=2, leaves=3, remote ranks=2 6 [1] 0 <- (0,1) 7 [1] 1 <- (2,0) 8 [1] 2 <- (0,2) 9 [2] Number of roots=2, leaves=3, remote ranks=3 10 [2] 0 <- (1,1) 11 [2] 1 <- (3,0) 12 [2] 2 <- (0,2) 13 [3] Number of roots=2, leaves=3, remote ranks=2 14 [3] 0 <- (2,1) 15 [3] 1 <- (0,0) 16 [3] 2 <- (0,2) 17 [0] Roots referenced by my leaves, by rank 18 [0] 1: 1 edges 19 [0] 1 <- 0 20 [0] 3: 1 edges 21 [0] 0 <- 1 22 [1] Roots referenced by my leaves, by rank 23 [1] 0: 2 edges 24 [1] 0 <- 1 25 [1] 2 <- 2 26 [1] 2: 1 edges 27 [1] 1 <- 0 28 [2] Roots referenced by my leaves, by rank 29 [2] 0: 1 edges 30 [2] 2 <- 2 31 [2] 1: 1 edges 32 [2] 0 <- 1 33 [2] 3: 1 edges 34 [2] 1 <- 0 35 [3] Roots referenced by my leaves, by rank 36 [3] 0: 2 edges 37 [3] 1 <- 0 38 [3] 2 <- 2 39 [3] 2: 1 edges 40 [3] 0 <- 1 41 current info=MPI_INFO_NULL 42## Data at multi-roots, to scatter to leaves 43[0] 0: 1000 1100 1200 1201 1202 44[1] 0: 2000 2100 45[2] 0: 3000 3100 46[3] 0: 4000 4100 47## Scattered data at leaves 48[0] 0: 4100 2000 49[1] 0: 1100 3000 1200 50[2] 0: 2100 4000 1201 51[3] 0: 3100 1000 1202 52