PetscSF Object: 4 MPI processes
  type: basic
  [0] Number of roots=3, leaves=2, remote ranks=2
  [0] 0 <- (3,1)
  [0] 1 <- (1,0)
  [1] Number of roots=2, leaves=3, remote ranks=2
  [1] 0 <- (0,1)
  [1] 1 <- (2,0)
  [1] 2 <- (0,2)
  [2] Number of roots=2, leaves=3, remote ranks=3
  [2] 0 <- (1,1)
  [2] 1 <- (3,0)
  [2] 2 <- (0,2)
  [3] Number of roots=2, leaves=3, remote ranks=2
  [3] 0 <- (2,1)
  [3] 1 <- (0,0)
  [3] 2 <- (0,2)
  [0] Roots referenced by my leaves, by rank
  [0] 1: 1 edges
  [0]    1 <- 0
  [0] 3: 1 edges
  [0]    0 <- 1
  [1] Roots referenced by my leaves, by rank
  [1] 0: 2 edges
  [1]    0 <- 1
  [1]    2 <- 2
  [1] 2: 1 edges
  [1]    1 <- 0
  [2] Roots referenced by my leaves, by rank
  [2] 0: 1 edges
  [2]    2 <- 2
  [2] 1: 1 edges
  [2]    0 <- 1
  [2] 3: 1 edges
  [2]    1 <- 0
  [3] Roots referenced by my leaves, by rank
  [3] 0: 2 edges
  [3]    1 <- 0
  [3]    2 <- 2
  [3] 2: 1 edges
  [3]    0 <- 1
  MultiSF sort=rank-order
## Bcast Rootdata
[0] 0: 100 101 102
[1] 0: 200 201
[2] 0: 300 301
[3] 0: 400 401
## Bcast Leafdata
[0] 0: 401 200
[1] 0: 101 300 102
[2] 0: 201 400 102
[3] 0: 301 100 102
## Bcast Rootdata in type of char
   0:    A    B    C
   1:    D    E
   2:    G    H
   3:    J    K
## Bcast Leafdata in type of char
   0:    K    D
   1:    B    G    C
   2:    E    J    C
   3:    H    A    C
## Pre-Reduce Rootdata
[0] 0: 100 101 102
[1] 0: 200 201
[2] 0: 300 301
[3] 0: 400 401
## Reduce Leafdata
[0] 0: 1000 1010
[1] 0: 2000 2010 2020
[2] 0: 3000 3010 3020
[3] 0: 4000 4010 4020
## Reduce Rootdata
[0] 0: 4010 2000 4020
[1] 0: 1010 3000
[2] 0: 2010 4000
[3] 0: 3010 1000
## Pre-Reduce Rootdata in type of signed char
   0:   10   11   12
   1:   20   21
   2:   30   31
   3:   40   41
## Reduce Leafdata in type of signed char
   0:   50   60
   1:  100  110  120
   2: -106  -96  -86
   3:  -56  -46  -36
## Reduce Rootdata in type of signed char
   0:   10  100  120
   1:   60   21
   2:  110   31
   3:   40   50
## Pre-Reduce Rootdata in type of unsigned char
   0:   10   11   12
   1:   20   21
   2:   30   31
   3:   40   41
## Reduce Leafdata in type of unsigned char
   0:   50   60
   1:  100  110  120
   2:  150  160  170
   3:  200  210  220
## Reduce Rootdata in type of unsigned char
   0:  210  100  220
   1:   60  150
   2:  110  200
   3:  160   50