triqs.utility.mpi_nompi

Serial stub implementation of the TRIQS MPI interface.

Mirrors the public surface of triqs.utility.mpi_mpi4py for the case where TRIQS is invoked outside of an MPI launcher. Every function either returns its input unchanged, performs a no-op, or runs the computation locally; the underlying mpi4py is never imported.

triqs.utility.mpi re-exports this module when triqs.utility.mpi.check_for_mpi() returns False.

Attributes

worldNone

Placeholder for the communicator. Always None in serial.

rankint

Always 0.

sizeint

Always 1.

All_Nodes_reportbool

Provided for API compatibility with the parallel backend; has no effect here. Default False.

Functions

all_reduce(x[, comm, op])	Serial reduction: return x unchanged.
barrier([poll_msec])	No-op barrier provided for API compatibility.
bcast(x[, root])	Serial broadcast: return x unchanged.
is_master_node()	Return True; in serial there is only the master rank.
master_gets_host_names()	Print the local hostname.
myprint_err(x)	Write x followed by a newline to sys.stderr.
myprint_out(x)	Write x followed by a newline to sys.stdout.
recv([source])	Serial receive: return the value previously stored by send().
report(*x, **opt)	Print one line per argument to stdout (or stderr).
send(val, dest)	Serial send: store val so that the next recv() can retrieve it.
slice_array(A)	Serial slice: return A unchanged.