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from mpi4py import MPI
import mpiunittest as unittest
try:
import array
except ImportError:
array = None
def asarray(typecode, data):
tobytes = lambda s: memoryview(s).tobytes()
frombytes = array.array.frombytes
a = array.array(typecode, [])
frombytes(a, tobytes(data))
return a
def mysum_obj(a, b):
for i in range(len(a)):
b[i] = a[i] + b[i]
return b
def mysum_buf(a, b, dt):
assert dt == MPI.INT
assert len(a) == len(b)
b[:] = mysum_obj(asarray('i', a), asarray('i', b))
def mysum(ba, bb, dt):
if dt is None:
return mysum_obj(ba, bb)
else:
return mysum_buf(ba, bb, dt)
def mybor(a, b, dt):
assert dt == MPI.BYTE
assert len(a) == len(b)
for i in range(len(a)):
b[i] = a[i] | b[i]
class TestOp(unittest.TestCase):
def testConstructor(self):
op = MPI.Op()
self.assertFalse(op)
self.assertEqual(op, MPI.OP_NULL)
@unittest.skipIf(array is None, 'array')
def testCreate(self):
for comm in [MPI.COMM_SELF, MPI.COMM_WORLD]:
for commute in [True, False]:
for N in range(4):
myop = MPI.Op.Create(mysum, commute)
self.assertFalse(myop.is_predefined)
try:
size = comm.Get_size()
rank = comm.Get_rank()
a = array.array('i', [i*(rank+1) for i in range(N)])
b = array.array('i', [0]*len(a))
comm.Allreduce([a, MPI.INT], [b, MPI.INT], myop)
scale = sum(range(1,size+1))
for i in range(N):
self.assertEqual(b[i], scale*i)
res = myop(a, b)
self.assertIs(res, b)
for i in range(N):
self.assertEqual(b[i], a[i]+scale*i)
myop2 = MPI.Op(myop)
a = array.array('i', [1]*N)
b = array.array('i', [2]*N)
res = myop2(a, b)
self.assertIs(res, b)
for i in range(N):
self.assertEqual(b[i], 3)
myop2 = None
finally:
myop.Free()
def testCreateMany(self):
MAX_USER_OP = 32 # max user-defined operations
# create
ops = []
for i in range(MAX_USER_OP):
o = MPI.Op.Create(mysum)
ops.append(o)
with self.assertRaises(RuntimeError):
MPI.Op.Create(mysum)
# cleanup
for o in ops:
o.Free()
# another round
ops = []
for i in range(MAX_USER_OP):
op = MPI.Op.Create(mybor)
ops.append(op)
with self.assertRaises(RuntimeError):
MPI.Op.Create(mybor)
# local reductions
try:
b1 = bytearray([2] * 3)
b2 = bytearray([4] * 3)
for op in ops:
ibuf = [b1, MPI.BYTE]
obuf = [b2, MPI.BYTE]
op.Reduce_local(ibuf, obuf)
for c1, c2 in zip(b1, b2):
self.assertEqual(c1, 2)
self.assertEqual(c2, 6)
except NotImplementedError:
pass
# pickling support
try:
for op in ops:
op.__reduce__()
clon = MPI.Op.f2py(op.py2f())
with self.assertRaises(ValueError):
clon.__reduce__()
except NotImplementedError:
pass
# cleanup
for op in ops:
op.Free()
def _test_call(self, op, args, res):
self.assertEqual(op(*args), res)
self.assertEqual(MPI.Op(op)(*args), res)
def testCall(self):
self.assertRaises(TypeError, MPI.OP_NULL)
self.assertRaises(TypeError, MPI.OP_NULL, None)
self.assertRaises(ValueError, MPI.OP_NULL, None, None)
self._test_call(MPI.MIN, (2,3), 2)
self._test_call(MPI.MAX, (2,3), 3)
self._test_call(MPI.SUM, (2,3), 5)
self._test_call(MPI.PROD, (2,3), 6)
for x in (False, True):
for y in (False, True):
self._test_call(MPI.LAND, (x,y), x and y)
self._test_call(MPI.LOR, (x,y), x or y)
self._test_call(MPI.LXOR, (x,y), x ^ y)
for x in range(5):
for y in range(5):
self._test_call(MPI.BAND, (x,y), x & y)
self._test_call(MPI.BOR, (x,y), x | y)
self._test_call(MPI.BXOR, (x,y), x ^ y)
if MPI.REPLACE:
self._test_call(MPI.REPLACE, (2,3), 3)
self._test_call(MPI.REPLACE, (3,2), 2)
if MPI.NO_OP:
self._test_call(MPI.NO_OP, (2,3), 2)
self._test_call(MPI.NO_OP, (3,2), 3)
def testMinMax(self):
x = [1]; y = [1]
res = MPI.MIN(x, y)
self.assertEqual(res, x)
res = MPI.MAX(x, y)
self.assertEqual(res, x)
def testMinMaxLoc(self):
x = [1]; i = [2]; u = [x, i]
y = [2]; j = [1]; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertIs(res[0], x)
self.assertIs(res[1], i)
res = MPI.MINLOC(v, u)
self.assertIs(res[0], x)
self.assertIs(res[1], i)
res = MPI.MAXLOC(u, v)
self.assertIs(res[0], y)
self.assertIs(res[1], j)
res = MPI.MAXLOC(v, u)
self.assertIs(res[0], y)
self.assertIs(res[1], j)
#
x = [1]; i = 0; u = [x, i]
y = [1]; j = 1; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertIs(res[0], x)
self.assertIs(res[1], i)
res = MPI.MAXLOC(u, v)
self.assertIs(res[0], x)
self.assertIs(res[1], i)
#
x = [1]; i = 1; u = [x, i]
y = [1]; j = 0; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertIs(res[0], y)
self.assertIs(res[1], j)
res = MPI.MAXLOC(u, v)
self.assertIs(res[0], y)
self.assertIs(res[1], j)
#
x = [1]; i = [0]; u = [x, i]
y = [1]; j = [1]; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertIs(res[0], x)
self.assertIs(res[1], i)
res = MPI.MAXLOC(u, v)
self.assertIs(res[0], x)
self.assertIs(res[1], i)
#
x = [1]; i = [1]; u = [x, i]
y = [1]; j = [0]; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertIs(res[0], y)
self.assertIs(res[1], j)
res = MPI.MAXLOC(u, v)
self.assertIs(res[0], y)
self.assertIs(res[1], j)
@unittest.skipMPI('openmpi(<=1.8.1)')
def testIsCommutative(self):
try:
MPI.SUM.Is_commutative()
except NotImplementedError:
self.skipTest('mpi-op-is_commutative')
ops = [
MPI.MAX, MPI.MIN,
MPI.SUM, MPI.PROD,
MPI.LAND, MPI.BAND,
MPI.LOR, MPI.BOR,
MPI.LXOR, MPI.BXOR,
MPI.MAXLOC, MPI.MINLOC,
]
for op in ops:
flag = op.Is_commutative()
self.assertEqual(flag, op.is_commutative)
self.assertTrue(flag)
@unittest.skipMPI('openmpi(<=1.8.1)')
@unittest.skipMPI('mpich(==3.4.1)')
def testIsCommutativeExtra(self):
try:
MPI.SUM.Is_commutative()
except NotImplementedError:
self.skipTest('mpi-op-is_commutative')
ops = [MPI.REPLACE, MPI.NO_OP]
for op in ops:
if not op: continue
flag = op.Is_commutative()
self.assertEqual(flag, op.is_commutative)
#self.assertFalse(flag)
def testIsPredefined(self):
self.assertTrue(MPI.OP_NULL.is_predefined)
ops = [MPI.MAX, MPI.MIN,
MPI.SUM, MPI.PROD,
MPI.LAND, MPI.BAND,
MPI.LOR, MPI.BOR,
MPI.LXOR, MPI.BXOR,
MPI.MAXLOC, MPI.MINLOC,]
for op in ops:
self.assertTrue(op.is_predefined)
def testPicklePredefined(self):
from pickle import dumps, loads
ops = [
MPI.MAX, MPI.MIN,
MPI.SUM, MPI.PROD,
MPI.LAND, MPI.BAND,
MPI.LOR, MPI.BOR,
MPI.LXOR, MPI.BXOR,
MPI.MAXLOC, MPI.MINLOC,
MPI.OP_NULL, MPI.NO_OP,
]
for op in ops:
newop = loads(dumps(op))
self.assertIs(newop, op)
newop = loads(dumps(MPI.Op(op)))
self.assertIsNot(newop, op)
self.assertEqual(newop, op)
def testPickleUserDefined(self):
from pickle import dumps, loads
for commute in [True, False]:
myop1 = MPI.Op.Create(mysum, commute)
myop2 = loads(dumps(myop1))
self.assertNotEqual(myop1, myop2)
myop1.Free()
self.assertEqual(myop2([2], [3]), [5])
self.assertEqual(myop2.Is_commutative(), commute)
myop2.Free()
if __name__ == '__main__':
unittest.main()
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