PetscSF Object: 3 MPI processes
  type: basic
  [0] Number of roots=6, leaves=2, remote ranks=2
  [0] 0 <- (2,2)
  [0] 2 <- (1,0)
  [1] Number of roots=4, leaves=3, remote ranks=2
  [1] 0 <- (0,2)
  [1] 2 <- (2,0)
  [1] 4 <- (0,4)
  [2] Number of roots=4, leaves=3, remote ranks=2
  [2] 0 <- (1,2)
  [2] 2 <- (0,0)
  [2] 4 <- (0,4)
  [0] Roots referenced by my leaves, by rank
  [0] 1: 1 edges
  [0]    2 <- 0
  [0] 2: 1 edges
  [0]    0 <- 2
  [1] Roots referenced by my leaves, by rank
  [1] 0: 2 edges
  [1]    0 <- 2
  [1]    4 <- 4
  [1] 2: 1 edges
  [1]    2 <- 0
  [2] Roots referenced by my leaves, by rank
  [2] 0: 2 edges
  [2]    2 <- 0
  [2]    4 <- 4
  [2] 1: 1 edges
  [2]    0 <- 2
  MultiSF sort=rank-order
## Bcast Rootdata 
[0] 0: 100 -1 101 -1 102 -1
[1] 0: 200 -1 201 -1
[2] 0: 300 -1 301 -1
## Bcast Leafdata 
[0] 0: 301 -1 200 -1
[1] 0: 101 -1 300 -1 102 -1
[2] 0: 201 -1 100 -1 102 -1
## Reduce Leafdata 
[0] 0: 301 -1 200 -1
[1] 0: 101 -1 300 -1 102 -1
[2] 0: 201 -1 100 -1 102 -1
## Reduce Rootdata 
[0] 0: 200 -1 202 -1 306 -1
[1] 0: 400 -1 402 -1
[2] 0: 600 -1 602 -1
PetscSF Object: 3 MPI processes
  type: basic
  [0] Number of roots=6, leaves=2, remote ranks=2
  [0] 0 <- (2,2)
  [0] 1 <- (1,0)
  [1] Number of roots=4, leaves=3, remote ranks=2
  [1] 0 <- (0,2)
  [1] 1 <- (2,0)
  [1] 2 <- (0,4)
  [2] Number of roots=4, leaves=3, remote ranks=2
  [2] 0 <- (1,2)
  [2] 1 <- (0,0)
  [2] 2 <- (0,4)
  [0] Roots referenced by my leaves, by rank
  [0] 1: 1 edges
  [0]    1 <- 0
  [0] 2: 1 edges
  [0]    0 <- 2
  [1] Roots referenced by my leaves, by rank
  [1] 0: 2 edges
  [1]    0 <- 2
  [1]    2 <- 4
  [1] 2: 1 edges
  [1]    1 <- 0
  [2] Roots referenced by my leaves, by rank
  [2] 0: 2 edges
  [2]    1 <- 0
  [2]    2 <- 4
  [2] 1: 1 edges
  [2]    0 <- 2
  MultiSF sort=rank-order