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from mpi4py import MPI
import mpiunittest as unittest
import sys
MPI_ERR_OP = MPI.ERR_OP
try:
import array
except ImportError:
array = None
if array:
try:
tobytes = array.array.tobytes
except AttributeError:
tobytes = array.array.tostring
def frombytes(typecode, data):
a = array.array(typecode,[])
try:
data = data.tobytes()
except AttributeError:
pass
try:
_frombytes = array.array.frombytes
except AttributeError:
_frombytes = array.array.fromstring
_frombytes(a, data)
return a
def mysum_py(a, b):
for i in range(len(a)):
b[i] = a[i] + b[i]
return b
def mysum(ba, bb, dt):
if dt is None:
return mysum_py(ba, bb)
assert dt == MPI.INT
assert len(ba) == len(bb)
a = frombytes('i', ba)
b = frombytes('i', bb)
b = mysum_py(a, b)
bb[:] = tobytes(b)
class TestOp(unittest.TestCase):
def testConstructor(self):
op = MPI.Op()
self.assertFalse(op)
self.assertEqual(op, MPI.OP_NULL)
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:
if hasattr(sys, 'pypy_version_info'):
if comm.size > 1: continue
# buffer(empty_array) returns
# the same non-NULL pointer !!!
if N == 0: continue
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)
ret = myop(a, b)
self.assertTrue(ret is 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)
ret = myop2(a, b)
self.assertTrue(ret is b)
for i in range(N):
self.assertEqual(b[i], 3)
myop2 = None
finally:
myop.Free()
def testCreateMany(self):
N = 32 # max user-defined operations
#
ops = []
for i in range(N):
o = MPI.Op.Create(mysum)
ops.append(o)
for o in ops: o.Free() # cleanup
# another round
ops = []
for i in range(N):
o = MPI.Op.Create(mysum)
ops.append(o)
for o in ops: o.Free() # cleanup
def _test_call(self, op, args, res):
self.assertEqual(op(*args), res)
def testCall(self):
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)
def xor(x,y): return bool(x) ^ bool(y)
for x, y in ((0, 0),
(0, 1),
(1, 0),
(1, 1)):
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), xor(x, y))
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.assertTrue(res is x)
res = MPI.MAX(x, y)
self.assertTrue(res is x)
def testMinMaxLoc(self):
x = [1]; i = [2]; u = [x, i]
y = [2]; j = [1]; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertTrue(res[0] is x)
self.assertTrue(res[1] is i)
res = MPI.MINLOC(v, u)
self.assertTrue(res[0] is x)
self.assertTrue(res[1] is i)
res = MPI.MAXLOC(u, v)
self.assertTrue(res[0] is y)
self.assertTrue(res[1] is j)
res = MPI.MAXLOC(v, u)
self.assertTrue(res[0] is y)
self.assertTrue(res[1] is j)
#
x = [1]; i = 0; u = [x, i]
y = [1]; j = 1; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertTrue(res[0] is x)
self.assertTrue(res[1] is i)
res = MPI.MAXLOC(u, v)
self.assertTrue(res[0] is x)
self.assertTrue(res[1] is i)
#
x = [1]; i = 1; u = [x, i]
y = [1]; j = 0; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertTrue(res[0] is y)
self.assertTrue(res[1] is j)
res = MPI.MAXLOC(u, v)
self.assertTrue(res[0] is y)
self.assertTrue(res[1] is j)
#
x = [1]; i = [0]; u = [x, i]
y = [1]; j = [1]; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertTrue(res[0] is x)
self.assertTrue(res[1] is i)
res = MPI.MAXLOC(u, v)
self.assertTrue(res[0] is x)
self.assertTrue(res[1] is i)
#
x = [1]; i = [1]; u = [x, i]
y = [1]; j = [0]; v = [y, j]
res = MPI.MINLOC(u, v)
self.assertTrue(res[0] is y)
self.assertTrue(res[1] is j)
res = MPI.MAXLOC(u, v)
self.assertTrue(res[0] is y)
self.assertTrue(res[1] is j)
def testIsCommutative(self):
try: MPI.SUM.Is_commutative()
except NotImplementedError: return
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)
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)
name, version = MPI.get_vendor()
if name == 'Open MPI':
if version < (1,8,2):
del TestOp.testIsCommutative
if not array:
del TestOp.testCreate
if __name__ == '__main__':
unittest.main()
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