def collective_fn(input_tensor, output_tensor, context):
pygloo.allgather(
context,
gloo_util.get_tensor_ptr(input_tensor),
gloo_util.get_tensor_ptr(output_tensor),
gloo_util.get_tensor_n_elements(input_tensor),
gloo_util.get_gloo_tensor_dtype(input_tensor),
)
def test_allgather(rank, world_size, fileStore_path):
'''
rank # Rank of this process within list of participating processes
world_size # Number of participating processes
'''
if rank == 0:
if os.path.exists(fileStore_path):
shutil.rmtree(fileStore_path)
os.makedirs(fileStore_path)
else:
time.sleep(0.5)
context = pygloo.rendezvous.Context(rank, world_size)
attr = pygloo.transport.tcp.attr("localhost")
# Perform rendezvous for TCP pairs
dev = pygloo.transport.tcp.CreateDevice(attr)
fileStore = pygloo.rendezvous.FileStore(fileStore_path)
store = pygloo.rendezvous.PrefixStore(str(world_size), fileStore)
context.connectFullMesh(store, dev)
sendbuf = np.array([[1, 2, 3], [1, 2, 3]], dtype=np.float32)
recvbuf = np.zeros([world_size] + list(sendbuf.shape), dtype=np.float32)
sendptr = sendbuf.ctypes.data
recvptr = recvbuf.ctypes.data
# sendbuf = torch.Tensor([[1,2,3],[1,2,3]]).float()
# recvbuf = torch.zeros([world_size] + list(sendbuf.shape)).float()
# sendptr = sendbuf.data_ptr()
# recvptr = recvbuf.data_ptr()
assert sendbuf.size() * world_size == recvbuf.size()
data_size = sendbuf.size if isinstance(
sendbuf, np.ndarray) else sendbuf.numpy().size
datatype = pygloo.glooDataType_t.glooFloat32
pygloo.allgather(context, sendptr, recvptr, data_size, datatype)
print(f"rank {rank} sends {sendbuf},\nreceives {recvbuf}")