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import os
import pathlib
import sys
import tempfile
import textwrap
import mpitestutil as testutil
import mpiunittest as unittest
import mpi4py
from mpi4py import MPI
import platform
MPI4PYPATH = pathlib.Path(mpi4py.__path__[0]).resolve().parent
CHILDSCRIPT = pathlib.Path(__file__).resolve().parent / "spawn_child.py"
def childscript():
fd, script = tempfile.mkstemp(suffix=".py", prefix="mpi4py-")
os.close(fd)
script = pathlib.Path(script)
python = os.fspath(sys.executable)
pypath = os.fspath(MPI4PYPATH)
script.write_text(
textwrap.dedent(f"""\
#!{python}
import sys
sys.path.insert(0, "{pypath}")
from mpi4py import MPI
parent = MPI.Comm.Get_parent()
parent.Barrier()
parent.Disconnect()
assert parent == MPI.COMM_NULL
parent = MPI.Comm.Get_parent()
assert parent == MPI.COMM_NULL
""")
)
script.chmod(0o770)
return script
@unittest.skipIf(testutil.disable_mpi_spawn(), "mpi-spawn")
class BaseTestSpawn:
#
COMM = MPI.COMM_NULL
COMMAND = sys.executable
ARGS = [os.fspath(CHILDSCRIPT), os.fspath(MPI4PYPATH)]
MAXPROCS = 1
INFO = MPI.INFO_NULL
ROOT = 0
class BaseTestSpawnSingle(BaseTestSpawn):
#
def testCommSpawn(self):
self.COMM.Barrier()
child = self.COMM.Spawn(
self.COMMAND,
self.ARGS,
self.MAXPROCS,
info=self.INFO,
root=self.ROOT,
)
local_size = child.Get_size()
remote_size = child.Get_remote_size()
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
self.assertEqual(local_size, self.COMM.Get_size())
self.assertEqual(remote_size, self.MAXPROCS)
@unittest.skipMPI("msmpi")
def testErrcodes(self):
self.COMM.Barrier()
errcodes = []
child = self.COMM.Spawn(
self.COMMAND,
self.ARGS,
self.MAXPROCS,
info=self.INFO,
root=self.ROOT,
errcodes=errcodes,
)
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
self.assertEqual(len(errcodes), self.MAXPROCS)
for errcode in errcodes:
self.assertEqual(errcode, MPI.SUCCESS)
@unittest.skipMPI("msmpi")
@unittest.skipMPI("mpich(==3.4.1)")
@unittest.skipIf(platform.machine() == 'ppc', "testArgsOnlyAtRoot fails on powerpc")
def testArgsOnlyAtRoot(self):
self.COMM.Barrier()
if self.COMM.Get_rank() == self.ROOT:
child = self.COMM.Spawn(
self.COMMAND,
self.ARGS,
self.MAXPROCS,
info=self.INFO,
root=self.ROOT,
)
else:
child = self.COMM.Spawn(
None,
None,
-1,
info=MPI.INFO_NULL,
root=self.ROOT,
)
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
@unittest.skipIf(os.name != "posix", "posix")
def testNoArgs(self):
self.COMM.Barrier()
script = None
if self.COMM.Get_rank() == self.ROOT:
script = childscript()
self.COMM.Barrier()
script = self.COMM.bcast(script, root=self.ROOT)
child = self.COMM.Spawn(
script,
None,
self.MAXPROCS,
info=self.INFO,
root=self.ROOT,
)
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
if self.COMM.Get_rank() == self.ROOT:
script.unlink()
self.COMM.Barrier()
class BaseTestSpawnMultiple(BaseTestSpawn):
#
def testCommSpawn(self):
self.COMM.Barrier()
count = 2 + (self.COMM.Get_size() == 0)
COMMAND = [self.COMMAND] * count
ARGS = [self.ARGS] * len(COMMAND)
MAXPROCS = [self.MAXPROCS] * len(COMMAND)
INFO = [self.INFO] * len(COMMAND)
child = self.COMM.Spawn_multiple(
COMMAND,
ARGS,
MAXPROCS,
info=INFO,
root=self.ROOT,
)
local_size = child.Get_size()
remote_size = child.Get_remote_size()
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
self.assertEqual(local_size, self.COMM.Get_size())
self.assertEqual(remote_size, sum(MAXPROCS))
def testCommSpawnDefaults1(self):
self.COMM.Barrier()
count = 2 + (self.COMM.Get_size() == 0)
COMMAND = [self.COMMAND] * count
ARGS = [self.ARGS] * len(COMMAND)
child = self.COMM.Spawn_multiple(COMMAND, ARGS)
local_size = child.Get_size()
remote_size = child.Get_remote_size()
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
self.assertEqual(local_size, self.COMM.Get_size())
self.assertEqual(remote_size, len(COMMAND))
def testCommSpawnDefaults2(self):
self.COMM.Barrier()
count = 2 + (self.COMM.Get_size() == 0)
COMMAND = [self.COMMAND] * count
ARGS = [self.ARGS] * len(COMMAND)
child = self.COMM.Spawn_multiple(COMMAND, ARGS, 1, MPI.INFO_NULL)
local_size = child.Get_size()
remote_size = child.Get_remote_size()
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
self.assertEqual(local_size, self.COMM.Get_size())
self.assertEqual(remote_size, len(COMMAND))
@unittest.skipMPI("msmpi")
def testErrcodes(self):
self.COMM.Barrier()
count = 2 + (self.COMM.Get_size() == 0)
COMMAND = [self.COMMAND] * count
ARGS = [self.ARGS] * len(COMMAND)
MAXPROCS = list(range(1, len(COMMAND) + 1))
INFO = MPI.INFO_NULL
errcodelist = []
child = self.COMM.Spawn_multiple(
COMMAND,
ARGS,
MAXPROCS,
info=INFO,
root=self.ROOT,
errcodes=errcodelist,
)
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
self.assertEqual(len(errcodelist), len(COMMAND))
for i, errcodes in enumerate(errcodelist):
self.assertEqual(len(errcodes), MAXPROCS[i])
for errcode in errcodes:
self.assertEqual(errcode, MPI.SUCCESS)
@unittest.skipMPI("msmpi")
def testArgsOnlyAtRoot(self):
self.COMM.Barrier()
if self.COMM.Get_rank() == self.ROOT:
count = 2 + (self.COMM.Get_size() == 0)
COMMAND = [self.COMMAND] * count
ARGS = [self.ARGS] * len(COMMAND)
MAXPROCS = list(range(1, len(COMMAND) + 1))
INFO = [MPI.INFO_NULL] * len(COMMAND)
child = self.COMM.Spawn_multiple(
COMMAND,
ARGS,
MAXPROCS,
info=INFO,
root=self.ROOT,
)
else:
child = self.COMM.Spawn_multiple(
None,
None,
-1,
info=MPI.INFO_NULL,
root=self.ROOT,
)
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
@unittest.skipIf(os.name != "posix", "posix")
def testNoArgs(self):
self.COMM.Barrier()
script = None
if self.COMM.Get_rank() == self.ROOT:
script = childscript()
self.COMM.Barrier()
script = self.COMM.bcast(script, root=self.ROOT)
count = 2 + (self.COMM.Get_size() == 0)
COMMAND = [script] * count
MAXPROCS = list(range(1, len(COMMAND) + 1))
INFO = [self.INFO] * len(COMMAND)
child = self.COMM.Spawn_multiple(
COMMAND,
None,
MAXPROCS,
info=INFO,
root=self.ROOT,
)
child.Barrier()
child.Disconnect()
self.COMM.Barrier()
if self.COMM.Get_rank() == self.ROOT:
script.unlink()
self.COMM.Barrier()
def testArgsBad(self):
if self.COMM.Get_size() > 1:
return
CMDS = [self.COMMAND]
ARGS = [self.ARGS]
MAXP = [self.MAXPROCS]
INFO = [self.INFO]
with self.assertRaises(ValueError):
self.COMM.Spawn_multiple(CMDS[0], ARGS, MAXP, INFO, root=0)
with self.assertRaises(ValueError):
self.COMM.Spawn_multiple(CMDS, ARGS * 2, MAXP, INFO, root=0)
with self.assertRaises(ValueError):
self.COMM.Spawn_multiple(CMDS, ARGS[0][0], MAXP * 2, INFO, root=0)
with self.assertRaises(ValueError):
self.COMM.Spawn_multiple(CMDS, ARGS, MAXP[0], INFO * 2, root=0)
class TestSpawnSingleSelf(BaseTestSpawnSingle, unittest.TestCase):
#
COMM = MPI.COMM_SELF
class TestSpawnSingleWorld(BaseTestSpawnSingle, unittest.TestCase):
#
COMM = MPI.COMM_WORLD
class TestSpawnSingleSelfMany(TestSpawnSingleSelf):
#
MAXPROCS = MPI.COMM_WORLD.Get_size()
class TestSpawnSingleWorldMany(TestSpawnSingleWorld):
#
MAXPROCS = MPI.COMM_WORLD.Get_size()
class TestSpawnMultipleSelf(BaseTestSpawnMultiple, unittest.TestCase):
#
COMM = MPI.COMM_SELF
class TestSpawnMultipleWorld(BaseTestSpawnMultiple, unittest.TestCase):
#
COMM = MPI.COMM_WORLD
class TestSpawnMultipleSelfMany(TestSpawnMultipleSelf):
#
MAXPROCS = MPI.COMM_WORLD.Get_size()
class TestSpawnMultipleWorldMany(TestSpawnMultipleWorld):
#
MAXPROCS = MPI.COMM_WORLD.Get_size()
if __name__ == "__main__":
unittest.main()
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