### SHELL> mpiexec -np 2 Rscript --vanilla [...]_spmd.r
suppressMessages(library(pbdMPI, quietly = TRUE))
source("./01_setting")
x.total <- N * .comm.size
x <- (1:N) + N * .comm.rank
time.proc <- list()
time.proc$list <- system.time({
for(i in 1:iter.total){
y <- allgather(list(x))
}
barrier()
})
time.proc$matrix <- system.time({
for(i in 1:iter.total){
y <- allgather(matrix(x, nrow = sqrt(N)))
}
barrier()
})
time.proc$integer <- system.time({
for(i in 1:iter.total){
y <- allgather(as.integer(x), integer(x.total))
}
barrier()
})
time.proc$double <- system.time({
for(i in 1:iter.total){
y <- allgather(as.double(x), double(x.total))
}
barrier()
})
comm.print(time.proc, quiet = TRUE)
finalize()
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