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from mpi4py import MPI
import mpiunittest as unittest
import arrayimpl
def create_topo_comms(comm):
size = comm.Get_size()
rank = comm.Get_rank()
# Cartesian
n = int(size**1/2.0)
m = int(size**1/3.0)
if m*m*m == size:
dims = [m, m, m]
elif n*n == size:
dims = [n, n]
else:
dims = [size]
periods = [True] * len(dims)
yield comm.Create_cart(dims, periods=periods)
# Graph
index, edges = [0], []
for i in range(size):
pos = index[-1]
index.append(pos+2)
edges.append((i-1)%size)
edges.append((i+1)%size)
yield comm.Create_graph(index, edges)
# Dist Graph
sources = [(rank-2)%size, (rank-1)%size]
destinations = [(rank+1)%size, (rank+2)%size]
yield comm.Create_dist_graph_adjacent(sources, destinations)
def get_neighbors_count(comm):
topo = comm.Get_topology()
if topo == MPI.CART:
ndim = comm.Get_dim()
return 2*ndim, 2*ndim
if topo == MPI.GRAPH:
rank = comm.Get_rank()
nneighbors = comm.Get_neighbors_count(rank)
return nneighbors, nneighbors
if topo == MPI.DIST_GRAPH:
indeg, outdeg, w = comm.Get_dist_neighbors_count()
return indeg, outdeg
return 0, 0
def have_feature():
cartcomm = MPI.COMM_SELF.Create_cart([1], periods=[0])
try:
cartcomm.neighbor_allgather(None)
return True
except NotImplementedError:
return False
finally:
cartcomm.Free()
@unittest.skipIf(not have_feature(), 'mpi-neighbor')
class BaseTestCCONghBuf:
COMM = MPI.COMM_NULL
def testNeighborAllgather(self):
for comm in create_topo_comms(self.COMM):
rsize, ssize = get_neighbors_count(comm)
for array, typecode in arrayimpl.loop():
if unittest.is_mpi_gpu('openmpi', array):
# segfault as of OpenMPI 4.1.1; TODO(leofang): why?
if array.backend == 'numba':
continue
for v in range(3):
check = arrayimpl.scalar(v)
sbuf = array( v, typecode, 3)
rbuf = array(-1, typecode, (rsize, 3))
comm.Neighbor_allgather(sbuf.as_mpi(), rbuf.as_mpi())
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, 3)
rbuf = array(-1, typecode, (rsize, 3))
comm.Neighbor_allgatherv(sbuf.as_mpi_c(3), rbuf.as_mpi_c(3))
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, 3)
rbuf = array(-1, typecode, (rsize, 3))
comm.Ineighbor_allgather(sbuf.as_mpi(), rbuf.as_mpi()).Wait()
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, 3)
rbuf = array(-1, typecode, (rsize, 3))
comm.Ineighbor_allgatherv(sbuf.as_mpi_c(3), rbuf.as_mpi_c(3)).Wait()
for value in rbuf.flat:
self.assertEqual(value, check)
comm.Free()
def testNeighborAlltoall(self):
for comm in create_topo_comms(self.COMM):
rsize, ssize = get_neighbors_count(comm)
for array, typecode in arrayimpl.loop():
for v in range(3):
check = arrayimpl.scalar(v)
sbuf = array( v, typecode, (ssize, 3))
rbuf = array(-1, typecode, (rsize, 3))
comm.Neighbor_alltoall(sbuf.as_mpi(), rbuf.as_mpi_c(3))
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, (ssize, 3))
rbuf = array(-1, typecode, (rsize, 3))
comm.Neighbor_alltoall(sbuf.as_mpi(), rbuf.as_mpi())
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, (ssize, 3))
rbuf = array(-1, typecode, (rsize, 3))
comm.Neighbor_alltoallv(sbuf.as_mpi_c(3), rbuf.as_mpi_c(3))
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, (ssize, 3))
rbuf = array(-1, typecode, (rsize, 3))
comm.Ineighbor_alltoall(sbuf.as_mpi(), rbuf.as_mpi()).Wait()
for value in rbuf.flat:
self.assertEqual(value, check)
sbuf = array( v, typecode, (ssize, 3))
rbuf = array(-1, typecode, (rsize, 3))
comm.Ineighbor_alltoallv(sbuf.as_mpi_c(3), rbuf.as_mpi_c(3)).Wait()
for value in rbuf.flat:
self.assertEqual(value, check)
comm.Free()
def testNeighborAlltoallw(self):
size = self.COMM.Get_size()
for comm in create_topo_comms(self.COMM):
rsize, ssize = get_neighbors_count(comm)
for array, typecode in arrayimpl.loop():
for n in range(1, 4):
for v in range(3):
check = arrayimpl.scalar(v)
sbuf = array( v, typecode, (ssize, n))
rbuf = array(-1, typecode, (rsize, n))
sdt, rdt = sbuf.mpidtype, rbuf.mpidtype
sdsp = list(range(0, ssize*n*sdt.extent, n*sdt.extent))
rdsp = list(range(0, rsize*n*rdt.extent, n*rdt.extent))
smsg = [sbuf.as_raw(), ([n]*ssize, sdsp), [sdt]*ssize]
rmsg = (rbuf.as_raw(), ([n]*rsize, rdsp), [rdt]*rsize)
try:
comm.Neighbor_alltoallw(smsg, rmsg)
except NotImplementedError:
self.skipTest('mpi-neighbor_alltoallw')
for value in rbuf.flat:
self.assertEqual(value, check)
check = arrayimpl.scalar(v+1)
smsg[0] = array(v+1, typecode, (ssize, n)).as_raw()
try:
comm.Ineighbor_alltoallw(smsg, rmsg).Wait()
except NotImplementedError:
self.skipTest('mpi-ineighbor_alltoallw')
for value in rbuf.flat:
self.assertEqual(value, check)
comm.Free()
def testNeighborAlltoallwBottom(self):
size = self.COMM.Get_size()
for comm in create_topo_comms(self.COMM):
rsize, ssize = get_neighbors_count(comm)
for array, typecode in arrayimpl.loop():
if unittest.is_mpi_gpu('openmpi', array): continue
for n in range(1,4):
for v in range(3):
check = arrayimpl.scalar(v)
sbuf = array( v, typecode, (ssize, n))
rbuf = array(-1, typecode, (rsize, n))
saddr = MPI.Get_address(sbuf.as_raw())
raddr = MPI.Get_address(rbuf.as_raw())
sdt, rdt = sbuf.mpidtype, rbuf.mpidtype
sdsp = list(range(0, ssize*n*sdt.extent, n*sdt.extent))
rdsp = list(range(0, rsize*n*rdt.extent, n*rdt.extent))
sdsp = [saddr + d for d in sdsp]
rdsp = [raddr + d for d in rdsp]
smsg = [MPI.BOTTOM, ([n]*ssize, sdsp), [sdt]*ssize]
rmsg = (MPI.BOTTOM, ([n]*rsize, rdsp), [rdt]*rsize)
try:
comm.Neighbor_alltoallw(smsg, rmsg)
except NotImplementedError:
self.skipTest('mpi-neighbor_alltoallw')
for value in rbuf.flat:
self.assertEqual(value, check)
check = arrayimpl.scalar(v+1)
sbuf.flat[:] = array(v+1, typecode, (ssize, n)).flat
try:
comm.Ineighbor_alltoallw(smsg, rmsg).Wait()
except NotImplementedError:
self.skipTest('mpi-neighbor_alltoallw')
for value in rbuf.flat:
self.assertEqual(value, check)
comm.Free()
class TestCCONghBufSelf(BaseTestCCONghBuf, unittest.TestCase):
COMM = MPI.COMM_SELF
class TestCCONghBufWorld(BaseTestCCONghBuf, unittest.TestCase):
COMM = MPI.COMM_WORLD
class TestCCONghBufSelfDup(TestCCONghBufSelf):
def setUp(self):
self.COMM = MPI.COMM_SELF.Dup()
def tearDown(self):
self.COMM.Free()
class TestCCONghBufWorldDup(TestCCONghBufWorld):
def setUp(self):
self.COMM = MPI.COMM_WORLD.Dup()
def tearDown(self):
self.COMM.Free()
name, version = MPI.get_vendor()
if name == 'Open MPI':
if version < (1,8,4):
_create_topo_comms = create_topo_comms
def create_topo_comms(comm):
for c in _create_topo_comms(comm):
if c.size * 2 < sum(c.degrees):
c.Free(); continue
yield c
if __name__ == '__main__':
unittest.main()
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