/usr/lib/python2.7/dist-packages/mpi4py/__main__.py is in python-mpi4py 1.3.1+hg20131106-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | # Author: Lisandro Dalcin
# Contact: dalcinl@gmail.com
"""
Run some benchmarks and tests
"""
def helloworld(comm, args=None, verbose=True):
"""
Hello, World! using MPI
"""
from mpi4py import MPI
from optparse import OptionParser
parser = OptionParser(prog="mpi4py helloworld")
parser.add_option("-q","--quiet", action="store_false",
dest="verbose", default=verbose)
(options, args) = parser.parse_args(args)
size = comm.Get_size()
rank = comm.Get_rank()
name = MPI.Get_processor_name()
message = ("Hello, World! I am process %*d of %d on %s."
% (len(str(size-1)), rank, size, name) )
_seq_begin(comm)
if options.verbose:
_println(message, stream=_stdout)
_seq_end(comm)
return message
def ringtest(comm, args=None, verbose=True):
"""
Time a message going around the ring of processes
"""
from array import array
from mpi4py import MPI
from optparse import OptionParser
parser = OptionParser(prog="mpi4py ringtest")
parser.add_option("-q","--quiet", action="store_false",
dest="verbose", default=verbose)
parser.add_option("-n", "--size", type="int", default=1, dest="size",
help="message size")
parser.add_option("-s", "--skip", type="int", default=0, dest="skip",
help="number of warm-up iterations")
parser.add_option("-l", "--loop", type="int", default=1, dest="loop",
help="number of iterations")
(options, args) = parser.parse_args(args)
def ring(comm, n=1, loop=1, skip=0):
iterations = list(range((loop+skip)))
size = comm.Get_size()
rank = comm.Get_rank()
source = (rank - 1) % size
dest = (rank + 1) % size
Sendrecv = comm.Sendrecv
Send = comm.Send
Recv = comm.Recv
Wtime = MPI.Wtime
sendmsg = array('B', [42])*n
recvmsg = array('B', [ 0])*n
if size == 1:
for i in iterations:
if i == skip:
tic = Wtime()
Sendrecv(sendmsg, dest, 0,
recvmsg, source, 0)
else:
if rank == 0:
for i in iterations:
if i == skip:
tic = Wtime()
Send(sendmsg, dest, 0)
Recv(recvmsg, source, 0)
else:
sendmsg = recvmsg
for i in iterations:
if i == skip:
tic = Wtime()
Recv(recvmsg, source, 0)
Send(sendmsg, dest, 0)
toc = Wtime()
if comm.rank == 0 and sendmsg != recvmsg:
import warnings, traceback
try:
warnings.warn("received message does not match!")
except UserWarning:
traceback.print_exc()
comm.Abort(2)
return toc - tic
size = getattr(options, 'size', 1)
loop = getattr(options, 'loop', 1)
skip = getattr(options, 'skip', 0)
comm.Barrier()
elapsed = ring(comm, size, loop, skip)
if options.verbose and comm.rank == 0:
_println("time for %d loops = %g seconds (%d processes, %d bytes)"
% (loop, elapsed, comm.size, size),
stream=_stdout)
return elapsed
from sys import stdout as _stdout
from sys import stderr as _stderr
def _println(message, stream):
stream.write(message+'\n')
stream.flush()
def _seq_begin(comm):
comm.Barrier()
size = comm.Get_size()
rank = comm.Get_rank()
if rank > 0:
comm.Recv([None, 'B'], rank - 1)
def _seq_end(comm):
size = comm.Get_size()
rank = comm.Get_rank()
if rank < size - 1:
comm.Send([None, 'B'], rank + 1)
comm.Barrier()
_commands = {
'helloworld' : helloworld,
'ringtest' : ringtest,
}
def main(args=None):
from optparse import OptionParser
from mpi4py import __name__ as prog
from mpi4py import __version__ as version
parser = OptionParser(prog=prog, version='%prog ' + version,
usage="%prog [options] <command> [args]")
parser.add_option("--no-threads",
action="store_false", dest="threaded", default=True,
help="initialize MPI without thread support")
parser.add_option("--thread-level", type="choice", metavar="LEVEL",
choices=["single", "funneled", "serialized", "multiple"],
action="store", dest="thread_level", default="multiple",
help="initialize MPI with required thread support")
parser.add_option("--mpe",
action="store_true", dest="mpe", default=False,
help="use MPE for MPI profiling")
parser.add_option("--vt",
action="store_true", dest="vt", default=False,
help="use VampirTrace for MPI profiling")
parser.disable_interspersed_args()
(options, args) = parser.parse_args(args)
#
import mpi4py
mpi4py.rc.threaded = options.threaded
mpi4py.rc.thread_level = options.thread_level
if options.mpe:
mpi4py.profile('mpe', logfile='mpi4py')
if options.vt:
mpi4py.profile('vt', logfile='mpi4py')
#
from mpi4py import MPI
comm = MPI.COMM_WORLD
if not args:
if comm.rank == 0:
parser.print_usage()
parser.exit()
command = args.pop(0)
if command not in _commands:
if comm.rank == 0:
parser.error("unknown command '%s'" % command)
parser.exit(2)
command = _commands[command]
command(comm, args=args)
parser.exit()
if __name__ == '__main__':
main()
|