base.procgrid: procgrid

In pbdBASE: Programming with Big Data -- Base Wrappers for Distributed Matrices

Description

"Optimal" process grid when nprow and npcol are empty

Usage

base.procgrid(nprocs)

Arguments

nprocs

Number of processors.

Details

For advanced users only. See pbdDMAT for high-level functions.

Value

A list contains nprow and npcol.

Examples

spmd.code <- "
  suppressMessages(library(pbdMPI))
  suppressMessages(library(pbdBASE))
  init.grid()

  opt <- base.procgrid(4)
  comm.print(opt)

  opt <- base.procgrid(6)
  comm.print(opt)

  opt <- base.procgrid(8)
  comm.print(opt)

  finalize()
"
pbdMPI::execmpi(spmd.code = spmd.code, nranks = 1L)

pbdBASE documentation built on March 26, 2020, 9:37 p.m.