def test_basic_math_ops(self):
ops = [
"torch.add", "torch.sub", "torch.mul", "torch.div", "+", "-", "*",
"/"
]
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
sharded_lhs = sharded_tensor.rand(spec, (12, 3))
sharded_rhs = sharded_tensor.rand(spec, (12, 3))
current_rank = dist.get_rank()
global_lhs = torch.empty((12, 3)) if current_rank == 0 else None
global_rhs = torch.empty((12, 3)) if current_rank == 0 else None
sharded_lhs.gather(dst=0, out=global_lhs)
sharded_rhs.gather(dst=0, out=global_rhs)
for op in ops:
binary_op = gen_binary_op_func(op)
binary_op_ = gen_binary_op_func(op, inplace=True)
# test basic math ops between ShardedTensors
sharded_output = binary_op(sharded_lhs, sharded_rhs)
output = torch.empty((12, 3)) if current_rank == 0 else None
sharded_output.gather(dst=0, out=output)
if current_rank == 0:
global_output = binary_op(global_lhs, global_rhs)
self.assertEqual(output, global_output)
# test basic math ops between ShardedTensor and scalar
scalars = [3, 1.8]
for scalar in scalars:
sharded_output_lhs = binary_op(sharded_lhs, scalar)
sharded_output_lhs_ = binary_op_(sharded_lhs, scalar)
self.assertTrue(
torch.allclose(sharded_output_lhs, sharded_output_lhs_))
output_lhs = torch.empty(
(12, 3)) if current_rank == 0 else None
sharded_output_lhs.gather(dst=0, out=output_lhs)
sharded_output_rhs = binary_op(scalar, sharded_lhs)
output_rhs = torch.empty(
(12, 3)) if current_rank == 0 else None
sharded_output_rhs.gather(dst=0, out=output_rhs)
if current_rank == 0:
global_output_lhs = binary_op(global_lhs, scalar)
global_output_rhs = binary_op(scalar, global_lhs)
self.assertEqual(output_lhs, global_output_lhs)
self.assertEqual(output_rhs, global_output_rhs)
def test_sharded_chunk_error(self):
chunk_spec = generate_chunk_sharding_specs_for_test(-1)
with self.assertRaisesRegex(NotImplementedError,
"Chunk by sharding dim is not supported."):
st = sharded_tensor.rand(chunk_spec[0], [17, 24])
torch.chunk(st, 5, dim=-1)
enumerable_spec = generate_enumerable_sharding_specs_for_test()
with self.assertRaisesRegex(
NotImplementedError,
"Only ChunkShardingSpec is supported for chunk."):
st = sharded_tensor.rand(enumerable_spec[0], [10, 10])
torch.chunk(st, 5, dim=-1)
def test_sharded_tensor_type_as(self):
specs = _chunk_sharding_specs_list_for_test([0], seed=7)
for spec in specs:
st = sharded_tensor.rand(
spec, 16, 30, 5, init_rrefs=True, dtype=torch.double
)
st_2 = sharded_tensor.rand(
spec, 16, 30, 5, init_rrefs=True, dtype=torch.float
)
st_3 = st.type_as(st_2)
self.assertEqual(torch.float, st_3.dtype)
self.assertEqual(torch.float, st_3.local_tensor().dtype)
st_3 = st.type_as(torch.zeros(10).type(torch.BoolTensor).cuda())
self.assertEqual(torch.bool, st_3.dtype)
self.assertEqual(torch.bool, st_3.local_tensor().dtype)
def test_sharded_tensor_reshard_errors(self):
specs = _chunk_sharding_specs_list_for_test([0, 1], seed=6)
spec, reshard_spec = specs[0], specs[1]
enumerable_sharding_spec = EnumerableShardingSpec([
ShardMetadata(
shard_offsets=[0, 0],
shard_sizes=[5, 5],
placement="rank:0/cuda:0",
),
ShardMetadata(
shard_offsets=[5, 0],
shard_sizes=[5, 5],
placement="rank:1/cuda:1",
),
])
st = sharded_tensor.rand(spec, 24, 12)
with self.assertRaisesRegex(
NotImplementedError,
"Only ChunkShardingSpec supported for reshard."):
st.reshard(enumerable_sharding_spec)
st._local_shards = [st.local_shards()[0], st.local_shards()[0]]
with self.assertRaisesRegex(
NotImplementedError,
"Only single local shard supported for reshard."):
st.reshard(reshard_spec)
def get_random_tensors(self,
spec1,
spec2,
*sizes,
pg1=None,
pg2=None,
seed_offset=0):
pg1 = _get_default_group() if pg1 is None else pg1
pg2 = _get_default_group() if pg2 is None else pg2
torch.manual_seed(TestShardedTensorBinaryOps.seed)
st1 = sharded_tensor.rand(spec1, sizes, process_group=pg1)
torch.manual_seed(TestShardedTensorBinaryOps.seed + seed_offset)
st2 = sharded_tensor.rand(spec2, sizes, process_group=pg2)
TestShardedTensorBinaryOps.seed += 1
return st1, st2
def __init__(
self,
spec: ShardingSpec,
) -> None:
super(MyShardedModel3, self).__init__()
self.sharded_tensor: ShardedTensor = sharded_tensor.rand(
spec, 10, 20, init_rrefs=False)
def test_math_ops_errors(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
sharded_lhs = sharded_tensor.rand(spec, (20, 3))
sharded_rhs = sharded_tensor.rand(spec, (12, 3))
with self.assertRaisesRegex(
RuntimeError, "Implicit broadcasting not supported"
):
torch.add(sharded_lhs, sharded_rhs)
spec = EnumerableShardingSpec(
[
ShardMetadata(
shard_offsets=[0, 0],
shard_sizes=[5, 5],
placement="rank:0/cuda:0",
),
ShardMetadata(
shard_offsets=[0, 5],
shard_sizes=[5, 5],
placement="rank:1/cuda:1",
),
ShardMetadata(
shard_offsets=[5, 0],
shard_sizes=[5, 5],
placement="rank:2/cuda:2",
),
ShardMetadata(
shard_offsets=[5, 5],
shard_sizes=[5, 5],
placement="rank:3/cuda:3",
),
]
)
st = sharded_tensor.rand(spec, 10, 10)
with self.assertRaisesRegex(RuntimeError, "not supported"):
torch.add(st, sharded_rhs)
def test_dummy_writer_works(self) -> None:
state_dict = {
'sharded': sharded_tensor.rand(self.get_spec(), 20, 20),
'replicated': torch.rand(10, 10),
'bytes': [1, 2, 3, 4]
}
save_state_dict(state_dict, FaultyStorageWriter({}))
def test_sharded_tensor_contiguous(self):
specs = _chunk_sharding_specs_list_for_test([0], seed=7)
for spec in specs:
st = sharded_tensor.rand(spec, 10, 22, 5, init_rrefs=True)
st = st.transpose(1, 0)
st = st.contiguous()
self.assertTrue(st.is_contiguous())
self.assertTrue(st.local_tensor().is_contiguous())
def __init__(self, spec=None, group=None):
super(MyShardedModel, self).__init__()
# Use same seed.
torch.manual_seed(0)
self.param = torch.nn.Parameter(torch.rand(5, 10))
if spec is not None:
self.sharded_param = sharded_tensor.rand(spec, 20, 10, requires_grad=True, process_group=group)
else:
self.sharded_param = torch.nn.Parameter(torch.rand(5, 10))
def test_sharded_tensor_transpose_error(self):
enumerable_spec = generate_enumerable_sharding_specs_for_test()[0]
st = sharded_tensor.rand(
enumerable_spec, 10, 10, init_rrefs=True, dtype=torch.double
)
with self.assertRaisesRegex(
NotImplementedError,
"Only ChunkShardingSpec supported for 'transpose'",
):
st.transpose(1, 0)
def _run_sharded_elementwise_ops(self, spec, input_size, op):
torch.manual_seed(self.rank)
st = sharded_tensor.rand(spec, *input_size)
new_st = op(st)
local_shard = st.local_tensor()
new_st_local_shard = new_st.local_tensor()
self.assertEqual(
op(local_shard),
new_st_local_shard,
)
def __init__(self, spec=None, group=None, init_rrefs=True) -> None:
super(MyShardedModel2, self).__init__()
if spec is not None:
self.sharded_tensor2 = sharded_tensor.rand(spec,
10,
20,
process_group=group,
init_rrefs=init_rrefs)
else:
self.sharded_tensor2 = None
self.random_tensor2 = torch.nn.Parameter(torch.rand(2, 2))
def test_storage_key_mapping(self) -> None:
device = f"cuda:{dist.get_rank()}"
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
],
)
state_dict = {
'sharded': sharded_tensor.rand(spec, (
10,
10,
)),
'replicated': torch.rand(4, device=device),
'bytes': [1, 2, 3, 4],
}
metadata, bytes_reqs, tensor_reqs = _prepare(
state_dict, write_replicated_data=self.rank == 0)
if self.rank == 0:
self.assertEqual(1, len(bytes_reqs))
self.assertEqual(2, len(tensor_reqs))
self.assertTrue('bytes' in metadata.state_dict_metadata)
self.assertEqual(bytes_reqs[0].storage_key,
metadata.state_dict_metadata['bytes'].storage_key)
# tensor ordering is unspecified
if len(tensor_reqs[0].tensor.size()) == 1:
replicated = tensor_reqs[0]
shard = tensor_reqs[1]
else:
replicated = tensor_reqs[1]
shard = tensor_reqs[0]
self.assertTrue('replicated' in metadata.state_dict_metadata)
self.assertEqual(
replicated.storage_key,
metadata.state_dict_metadata['replicated'].storage_key)
else:
self.assertEqual(0, len(bytes_reqs))
self.assertEqual(1, len(tensor_reqs))
shard = tensor_reqs[0]
self.assertTrue('sharded' in metadata.state_dict_metadata)
shard_keys = [
sm.storage_key for sm in
metadata.state_dict_metadata['sharded'].storage_metadata
]
self.assertTrue(shard.storage_key in shard_keys)
def test_sharded_tensor_transpose_error(self):
enumerable_spec = generate_enumerable_sharding_specs_for_test()[0]
st = sharded_tensor.rand(enumerable_spec,
10,
10,
init_rrefs=False,
dtype=torch.double)
with self.assertRaisesRegex(
RuntimeError,
"not supported",
):
st.transpose(1, 0)
def test_sharded_bmm_errors(self):
specs = generate_chunk_sharding_specs_for_test(0)
st_lhs = sharded_tensor.rand(specs[0], (15, 5, 6))
st_rhs = sharded_tensor.rand(specs[1], (15, 5, 6))
with self.assertRaisesRegex(
NotImplementedError,
'Both st and st2 need to have same placements for bmm',
):
torch.bmm(st_lhs, st_rhs)
for spec in specs:
st_lhs = sharded_tensor.rand(spec, (20, 3))
st_rhs = sharded_tensor.rand(spec, (20, 3))
with self.assertRaisesRegex(
TypeError,
'both st and st2 need to be a 3D ShardedTensor',
):
torch.bmm(st_lhs, st_rhs)
rhs = torch.rand(15, 5, 6).cuda(self.rank)
with self.assertRaisesRegex(
TypeError,
'st2 needs to be a ShardedTensor for torch.bmm',
):
torch.bmm(st_lhs, rhs)
spec.dim = 1
st_lhs = sharded_tensor.rand(spec, (15, 5, 6))
st_rhs = sharded_tensor.rand(spec, (15, 5, 6))
with self.assertRaisesRegex(
NotImplementedError,
'Only support performing bmm on tensors sharded on dim 0 now',
):
torch.bmm(st_lhs, st_rhs)
def test_sharded_tensor_softmax_error(self):
specs = _chunk_sharding_specs_list_for_test([0, 2], seed=17)
for spec in specs:
st = sharded_tensor.rand(
spec, 16, 30, 5, init_rrefs=True, dtype=torch.double
)
with self.assertRaisesRegex(
NotImplementedError,
"Only support performing softmax on non-sharding dim now.",
):
torch.nn.functional.softmax(
st, dim=st.sharding_spec().dim, dtype=torch.float32
)
def test_replicated_tensor_inter_op_sharded_tensor_errors(self):
local_tensor = torch.ones(3, 3, device=f"cuda:{self.rank}") * 4
replica_tensor = ReplicatedTensor(local_tensor)
torch.manual_seed(self.rank)
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
st1 = sharded_tensor.rand(spec, (20, 3, 3))
st2 = sharded_tensor.rand(spec, (30, 3, 3))
with self.assertRaisesRegex(RuntimeError, 'Implicit broadcasting'):
st1 + st2
with self.assertRaisesRegex(RuntimeError, 'not supported for ShardedTensor'):
st1 % replica_tensor
def _run_sharded_elementwise_ops(
self, spec, input_size, op, reset_seed=None, **kwargs
):
torch.manual_seed(self.rank)
st = sharded_tensor.rand(spec, *input_size)
reset_seed() if reset_seed else None
new_st = op(st, **kwargs)
local_shard = st.local_tensor()
new_st_local_shard = new_st.local_tensor()
reset_seed() if reset_seed else None
self.assertEqual(
op(local_shard, **kwargs),
new_st_local_shard,
)
def test_inplace_copy(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
st = sharded_tensor.rand(spec, (12, 5))
ones_st = sharded_tensor.ones(spec, (12, 5))
self.assertFalse(torch.equal(ones_st, st))
st.copy_(ones_st)
self.assertTrue(torch.equal(st, ones_st))
# no grad inplace_copy should work between two with different requires_grad
st_with_grad = sharded_tensor.rand(spec, (12, 5), requires_grad=True)
self.assertTrue(st_with_grad.requires_grad)
self.assertFalse(ones_st.requires_grad)
with torch.no_grad():
st_with_grad.copy_(ones_st)
self.assertEqual(st_with_grad.local_tensor(),
ones_st.local_tensor())
def test_clone(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
st = sharded_tensor.rand(spec, (12, 5))
copied_st = st.clone()
self.assertTrue(type(copied_st) is type(st))
self.assertEqual(copied_st.local_tensor(), st.local_tensor())
self.assertFalse(copied_st is st)
def test_storage_key_mapping(self) -> None:
device = f"cuda:{dist.get_rank()}"
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
],
)
state_dict = {
'sharded': sharded_tensor.rand(spec, (10, 10, )),
'replicated': torch.rand(4, device=device),
'bytes': [1, 2, 3, 4],
}
metadata, bytes_reqs, tensor_reqs = _prepare(state_dict, write_replicated_data=self.rank == 0)
if self.rank == 0:
self.assertEqual(1, len(bytes_reqs))
self.assertEqual(2, len(tensor_reqs))
self.assertTrue('bytes' in metadata.state_dict_metadata)
self.assertTrue(MetadataIndex('bytes') in metadata.storage_data)
# tensor ordering is unspecified
if len(tensor_reqs[0].tensor.size()) == 1:
replicated = tensor_reqs[0]
shard = tensor_reqs[1]
else:
replicated = tensor_reqs[1]
shard = tensor_reqs[0]
self.assertTrue('replicated' in metadata.state_dict_metadata)
storage_key = MetadataIndex('replicated', torch.Size([0]))
self.assertTrue(storage_key in metadata.storage_data)
self.assertTrue(metadata.storage_data[storage_key], replicated.storage_key)
else:
self.assertEqual(0, len(bytes_reqs))
self.assertEqual(1, len(tensor_reqs))
shard = tensor_reqs[0]
local_shard = state_dict["sharded"].local_shards()[0]
self.assertTrue('sharded' in metadata.state_dict_metadata)
storage_key = MetadataIndex('sharded', torch.Size(local_shard.metadata.shard_offsets))
self.assertTrue(storage_key in metadata.storage_data)
self.assertTrue(metadata.storage_data[storage_key], shard.storage_key)
def test_load_error_handling(self) -> None:
state_dict = {
'sharded': sharded_tensor.rand(self.get_spec(), 20, 20),
'replicated': torch.rand(10, 10),
'bytes': [1, 2, 3, 4]
}
self._test_load(state_dict)
self._test_load(state_dict, fail_read_metadata=[0])
self._test_load(state_dict, fail_read_bytes=[1])
self._test_load(state_dict, fail_read_bytes_async=[2])
self._test_load(state_dict, fail_read_tensors=[3])
self._test_load(state_dict, fail_read_tensors_async=[1])
# We don't want to depend on the actual exception raised by pickle
self._test_load(state_dict, fail_deser_bytes=[2], ignore_exception_type=True)
self._test_load(state_dict, coordinator=1, fail_read_metadata=[3])
self._test_load(state_dict, coordinator=2, fail_read_bytes=[0])
self._test_load(state_dict, coordinator=3, fail_read_tensors_async=[2])
def test_save_error_handling(self) -> None:
state_dict = {
'sharded': sharded_tensor.rand(self.get_spec(), 20, 20),
'replicated': torch.rand(10, 10),
'bytes': [1, 2, 3, 4]
}
self._test_save(state_dict, fail_prepare=[0])
self._test_save(state_dict, fail_finish=[0])
self._test_save(state_dict, fail_prepare_storage=[0])
self._test_save(state_dict, fail_write_tensors_on_ranks=[1])
self._test_save(state_dict, fail_write_tensors_on_ranks_async=[2])
self._test_save(state_dict, fail_write_bytes_on_ranks=[3])
self._test_save(state_dict, fail_write_bytes_on_ranks_async=[1])
self._test_save(state_dict, fail_write_tensors_on_ranks_async=[1, 3])
self._test_save(state_dict, coordinator=1, fail_prepare=[1])
self._test_save(state_dict, coordinator=1, fail_finish=[1])
def test_sharded_tensor_view_error(self):
for spec in _chunk_sharding_specs_list_for_test([2], seed=7):
st = sharded_tensor.rand(
spec, 35, 17, 26, init_rrefs=True, dtype=torch.double
)
with self.assertRaisesRegex(
NotImplementedError,
"Shape having dim 2 is not supported "
"for sharded tensor sharded on dim 2.",
):
st.view(35 * 17, 26)
with self.assertRaisesRegex(
ValueError,
r"Shape '\[5, 7, 35, 17, 26\]' is invalid for sharded tensor size 15470.",
):
st.view(5, 7, 35, 17, 26)
with self.assertRaisesRegex(
ValueError,
"Only one dimension can be inferred for sharded view op.",
):
st.view(5, 7, -1, -1)
def test_detach(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
st = sharded_tensor.rand(spec, (12, 5), requires_grad=True)
local_shards = st.local_shards()
# before set requires_grad, all local shards should not require grads
for local_shard in local_shards:
self.assertTrue(local_shard.tensor.requires_grad)
detached_st = st.detach()
self.assertFalse(detached_st.requires_grad)
for local_shard in detached_st.local_shards():
self.assertFalse(local_shard.tensor.requires_grad)
def test_sharded_tensor_masked_fill_error(self):
specs = _chunk_sharding_specs_list_for_test([1, 2], seed=7)
for spec in specs:
st = sharded_tensor.rand(
spec, 35, 17, 26, init_rrefs=True, dtype=torch.double
)
mask = (
torch.randint(0, 2, (2, 35, 17, 26))
.type(torch.BoolTensor)
.cuda(self.rank)
)
with self.assertRaisesRegex(
ValueError,
"mask dim must not greater than the dim of the sharded tensor.",
):
st.masked_fill(mask, 25.0)
mask = torch.randint(0, 2, (16, 26)).type(torch.BoolTensor).cuda(self.rank)
with self.assertRaisesRegex(
ValueError,
"The size of mask 0 must match the size of sharded tensor 1 "
"at non-singleton dimension 0",
):
st.masked_fill(mask, 25.0)
def test_switch_between_sharded_tensor_to_tensor(self) -> None:
path = self.get_file_path()
tensor_size = 32
specs = [
ChunkShardingSpec(
dim=0,
placements=[
"rank:0",
"rank:1",
],
),
ChunkShardingSpec(
dim=0,
placements=[
"rank:0",
"rank:1",
"rank:1",
"rank:0",
],
),
EnumerableShardingSpec(shards=[
ShardMetadata(
shard_offsets=[0],
shard_sizes=[8],
placement="rank:1",
),
ShardMetadata(
shard_offsets=[8],
shard_sizes=[tensor_size - 8],
placement="rank:0",
),
]),
EnumerableShardingSpec(shards=[
ShardMetadata(
shard_offsets=[0],
shard_sizes=[10],
placement="rank:0",
),
ShardMetadata(
shard_offsets=[10],
shard_sizes=[tensor_size - 10],
placement="rank:1",
),
]),
]
for save_spec in specs:
for load_spec in specs:
save_dict = {
'sharded':
sharded_tensor.rand(save_spec, tensor_size),
'replicated':
torch.rand(tensor_size, device=f"cpu:{self.rank}")
}
fs_writer = FileSystemWriter(path=path)
save_state_dict(state_dict=save_dict, storage_writer=fs_writer)
# Freaky Friday the tensors
load_dict = {
'sharded': torch.zeros(tensor_size,
device=f"cpu:{self.rank}"),
'replicated': sharded_tensor.zeros(load_spec, tensor_size)
}
fs_reader = FileSystemReader(path=path)
load_state_dict(state_dict=load_dict, storage_reader=fs_reader)
save_dict_sharded = self.load_tensor(save_dict['sharded'])
load_dict_replicated = self.load_tensor(
load_dict['replicated'])
if dist.get_rank() == 0:
self.assertTrue(
torch.allclose(save_dict_sharded,
load_dict['sharded']),
f"save-spec {save_spec} load-spec {load_spec}")
self.assertTrue(
torch.allclose(save_dict['replicated'],
load_dict_replicated),
f"save-spec {save_spec} load-spec {load_spec}")
