p0 init
p1 init
p2 init

p0 comm_size 3
p0 allReduce 5e8 5e8
p1 allReduce 5e8 5e8
p2 allReduce 5e8 5e8

p0 compute 5e8
p1 compute 5e8
p2 compute 5e8

p0 finalize
p1 finalize
p2 finalize