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from mpi4py import MPI
import mpiunittest as unittest
from functools import reduce
cumsum = lambda seq: reduce(lambda x, y: x+y, seq, 0)
cumprod = lambda seq: reduce(lambda x, y: x*y, seq, 1)
_basic = [
None,
True, False,
-7, 0, 7, 2**31,
-2**63+1, 2**63-1,
-2.17, 0.0, 3.14,
1+2j, 2-3j,
'mpi4py',
]
messages = list(_basic)
messages += [
list(_basic),
tuple(_basic),
{f'k{k}': v for k, v in enumerate(_basic)},
]
class BaseTestCCOObj:
COMM = MPI.COMM_NULL
def testBarrier(self):
self.COMM.barrier()
def testBcast(self):
for smess in messages:
for root in range(self.COMM.Get_size()):
rmess = self.COMM.bcast(smess, root=root)
self.assertEqual(smess, rmess)
def testGather(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
for smess in messages + [messages]:
for root in range(size):
rmess = self.COMM.gather(smess, root=root)
if rank == root:
self.assertEqual(rmess, [smess] * size)
else:
self.assertIsNone(rmess)
def testScatter(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
for smess in messages + [messages]:
for root in range(size):
if rank == root:
rmess = self.COMM.scatter([smess] * size, root=root)
else:
rmess = self.COMM.scatter(None, root=root)
self.assertEqual(rmess, smess)
def testAllgather(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
for smess in messages + [messages]:
rmess = self.COMM.allgather(smess)
self.assertEqual(rmess, [smess] * size)
def testAlltoall(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
for smess in messages + [messages]:
rmess = self.COMM.alltoall([smess] * size)
self.assertEqual(rmess, [smess] * size)
def testReduce(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
for root in range(size):
for op in (MPI.SUM, MPI.PROD,
MPI.MAX, MPI.MIN,
MPI.MAXLOC, MPI.MINLOC,
MPI.REPLACE, MPI.NO_OP):
if op == MPI.OP_NULL: continue
if op in (MPI.MAXLOC, MPI.MINLOC):
sendobj = (rank, rank)
else:
sendobj = rank
value = self.COMM.reduce(sendobj, op=op, root=root)
if rank != root:
self.assertIsNone(value)
else:
if op == MPI.SUM:
self.assertEqual(value, cumsum(range(size)))
elif op == MPI.PROD:
self.assertEqual(value, cumprod(range(size)))
elif op == MPI.MAX:
self.assertEqual(value, size-1)
elif op == MPI.MIN:
self.assertEqual(value, 0)
elif op == MPI.MAXLOC:
self.assertEqual(value[0], size-1)
self.assertEqual(value[1], size-1)
elif op == MPI.MINLOC:
self.assertEqual(value[0], 0)
self.assertEqual(value[1], 0)
elif op == MPI.REPLACE:
self.assertEqual(value, size-1)
elif op == MPI.NO_OP:
self.assertEqual(value, 0)
badroots = {-size, size}
for root in badroots:
with self.assertRaises(MPI.Exception) as cm:
self.COMM.reduce(None, op=MPI.NO_OP, root=root)
ierr = cm.exception.Get_error_class()
self.assertEqual(ierr, MPI.ERR_ROOT)
def testAllreduce(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
for op in (MPI.SUM, MPI.PROD,
MPI.MAX, MPI.MIN,
MPI.MAXLOC, MPI.MINLOC,
MPI.REPLACE, MPI.NO_OP):
if op == MPI.OP_NULL: continue
if op in (MPI.MAXLOC, MPI.MINLOC):
sendobj = (rank, rank)
else:
sendobj = rank
value = self.COMM.allreduce(sendobj, op)
if op == MPI.SUM:
self.assertEqual(value, cumsum(range(size)))
elif op == MPI.PROD:
self.assertEqual(value, cumprod(range(size)))
elif op == MPI.MAX:
self.assertEqual(value, size-1)
elif op == MPI.MIN:
self.assertEqual(value, 0)
elif op == MPI.MAXLOC:
self.assertEqual(value[1], size-1)
elif op == MPI.MINLOC:
self.assertEqual(value[1], 0)
elif op == MPI.REPLACE:
self.assertEqual(value, size-1)
elif op == MPI.NO_OP:
self.assertEqual(value, 0)
def testScan(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
# --
sscan = self.COMM.scan(size, op=MPI.SUM)
self.assertEqual(sscan, cumsum([size]*(rank+1)))
# --
rscan = self.COMM.scan(rank, op=MPI.SUM)
self.assertEqual(rscan, cumsum(range(rank+1)))
# --
minloc = self.COMM.scan((rank, rank), op=MPI.MINLOC)
maxloc = self.COMM.scan((rank, rank), op=MPI.MAXLOC)
self.assertEqual(minloc, (0, 0))
self.assertEqual(maxloc, (rank, rank))
# --
if MPI.REPLACE != MPI.OP_NULL:
rscan = self.COMM.scan(rank, op=MPI.REPLACE)
self.assertEqual(rscan, rank)
# --
if MPI.NO_OP != MPI.OP_NULL:
rscan = self.COMM.scan(rank, op=MPI.NO_OP)
self.assertEqual(rscan, 0)
def testExscan(self):
size = self.COMM.Get_size()
rank = self.COMM.Get_rank()
# --
sscan = self.COMM.exscan(size, op=MPI.SUM)
if rank == 0:
self.assertIsNone(sscan)
else:
self.assertEqual(sscan, cumsum([size]*(rank)))
# --
rscan = self.COMM.exscan(rank, op=MPI.SUM)
if rank == 0:
self.assertIsNone(sscan)
else:
self.assertEqual(rscan, cumsum(range(rank)))
# --
minloc = self.COMM.exscan((rank, rank), op=MPI.MINLOC)
maxloc = self.COMM.exscan((rank, rank), op=MPI.MAXLOC)
if rank == 0:
self.assertIsNone(minloc)
self.assertIsNone(maxloc)
else:
self.assertEqual(minloc, (0, 0))
self.assertEqual(maxloc, (rank-1, rank-1))
# --
if MPI.REPLACE != MPI.OP_NULL:
rscan = self.COMM.exscan(rank, op=MPI.REPLACE)
if rank == 0:
self.assertIsNone(rscan)
else:
self.assertEqual(rscan, rank-1)
# --
if MPI.NO_OP != MPI.OP_NULL:
rscan = self.COMM.exscan(rank, op=MPI.NO_OP)
if rank == 0:
self.assertIsNone(rscan)
else:
self.assertEqual(rscan, 0)
class TestCCOObjSelf(BaseTestCCOObj, unittest.TestCase):
COMM = MPI.COMM_SELF
class TestCCOObjWorld(BaseTestCCOObj, unittest.TestCase):
COMM = MPI.COMM_WORLD
class TestCCOObjSelfDup(TestCCOObjSelf):
def setUp(self):
self.COMM = MPI.COMM_SELF.Dup()
def tearDown(self):
self.COMM.Free()
@unittest.skipMPI('openmpi(<1.4.0)', MPI.Query_thread() > MPI.THREAD_SINGLE)
class TestCCOObjWorldDup(TestCCOObjWorld):
def setUp(self):
self.COMM = MPI.COMM_WORLD.Dup()
def tearDown(self):
self.COMM.Free()
if __name__ == '__main__':
unittest.main()
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