def test_sharded_tensor_sizes(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
# Test with *args
sharded_tensor = _sharded_tensor.empty(spec, 10, 20)
self.assertEqual(torch.Size([10, 20]), sharded_tensor.size())
# Test with single *args
sharded_tensor = _sharded_tensor.empty(spec, 10)
self.assertEqual(torch.Size([10]), sharded_tensor.size())
# Test with list
sharded_tensor = _sharded_tensor.empty(spec, [10, 20])
self.assertEqual(torch.Size([10, 20]), sharded_tensor.size())
# Test with tuple
sharded_tensor = _sharded_tensor.empty(spec, (10, 20))
self.assertEqual(torch.Size([10, 20]), sharded_tensor.size())
with self.assertRaises(TypeError):
sharded_tensor = _sharded_tensor.empty(spec, 'foo')
def test_sharded_tensor_metadata(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
sharded_tensor = _sharded_tensor.empty(spec, 10, 20)
sharded_tensor_metadata = sharded_tensor.metadata()
self.assertEqual(torch.Size([10, 20]), sharded_tensor_metadata.size)
self.assertEqual(torch.float, sharded_tensor_metadata.dtype)
self.assertEqual(torch.strided, sharded_tensor_metadata.layout)
self.assertEqual(False, sharded_tensor_metadata.requires_grad)
self.assertEqual(torch.contiguous_format,
sharded_tensor_metadata.memory_format)
self.assertEqual(False, sharded_tensor_metadata.pin_memory)
sharded_tensor = _sharded_tensor.empty(spec,
10,
20,
requires_grad=True)
sharded_tensor_metadata = sharded_tensor.metadata()
self.assertEqual(True, sharded_tensor_metadata.requires_grad)
sharded_tensor = _sharded_tensor.empty(spec,
10,
20,
dtype=torch.double)
sharded_tensor_metadata = sharded_tensor.metadata()
self.assertEqual(torch.double, sharded_tensor_metadata.dtype)
# Need CPU for pin_memory
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cpu",
"rank:1/cpu",
"rank:2/cpu",
"rank:3/cpu",
],
)
sharded_tensor = _sharded_tensor.empty(spec, 10, 20, pin_memory=True)
sharded_tensor_metadata = sharded_tensor.metadata()
self.assertEqual(True, sharded_tensor_metadata.pin_memory)
def test_new_group(self):
spec = EnumerableShardingSpec([
ShardMetadata(
shard_offsets=[0, 0],
shard_lengths=[5, 5],
placement="rank:0/cuda:1",
),
ShardMetadata(
shard_offsets=[5, 0],
shard_lengths=[5, 5],
placement="rank:2/cuda:3",
),
])
pg = dist.new_group(ranks=[1, 2, 3])
if self.rank >= 1:
sharded_tensor = _sharded_tensor.empty(spec,
10,
5,
process_group=pg)
self.assertEqual((10, 5), sharded_tensor.size())
if self.rank == 1 or self.rank == 3:
# Verify local shard.
local_shard = sharded_tensor.local_shards()[0]
self.assertEqual(torch.device(f'cuda:{self.rank}'),
local_shard.tensor.device)
self.assertEqual((5, 5), local_shard.tensor.size())
# Verify local shard metadata.
self.assertEqual((self.rank // 2 * 5, 0),
local_shard.metadata.shard_offsets)
self.assertEqual((5, 5), local_shard.metadata.shard_lengths)
self.assertEqual(f'rank:{self.rank - 1}/cuda:{self.rank}',
local_shard.metadata.placement)
# Verify global metadata.
sharding_metadata = sharded_tensor.sharding_metadata()
self.assertEqual(2, len(sharding_metadata))
for rank, shard_metadata in enumerate(sharding_metadata):
self.assertEqual((rank * 5, 0), shard_metadata.shard_offsets)
self.assertEqual((5, 5), shard_metadata.shard_lengths)
self.assertEqual(f'rank:{rank * 2}/cuda:{rank * 2 + 1}',
shard_metadata.placement)
# Validate remote shards.
remote_shards = sharded_tensor.remote_shards
if self.rank == 1 or self.rank == 3:
self.assertEqual(1, len(remote_shards))
else:
self.assertEqual(2, len(remote_shards))
owners = {}
for rpc_rank, shards in remote_shards.items():
self.assertEqual(1, len(shards))
for remote_shard in shards:
self.assertEqual(rpc_rank, remote_shard.owner().id)
shard = remote_shard.to_here()
self.assertEqual((5, 5), shard.tensor.size())
def test_partial_world_size(self):
spec = EnumerableShardingSpec([
ShardMetadata(
shard_offsets=[0, 0],
shard_lengths=[5, 5],
placement="rank:0/cuda:0",
),
ShardMetadata(
shard_offsets=[5, 0],
shard_lengths=[5, 5],
placement="rank:1/cuda:1",
),
])
sharded_tensor = _sharded_tensor.empty(spec, 10, 5)
self.assertEqual((10, 5), sharded_tensor.size())
if self.rank <= 1:
self.assertEqual(1, len(sharded_tensor.local_shards()))
else:
self.assertEqual(0, len(sharded_tensor.local_shards()))
if self.rank <= 1:
# Verify local shard.
local_shard = sharded_tensor.local_shards()[0]
self.assertEqual(torch.device(f'cuda:{self.rank}'),
local_shard.tensor.device)
self.assertEqual((5, 5), local_shard.tensor.size())
# Verify local shard metadata.
self.assertEqual((self.rank * 5, 0),
local_shard.metadata.shard_offsets)
self.assertEqual((5, 5), local_shard.metadata.shard_lengths)
self.assertEqual(f'rank:{self.rank}/cuda:{self.rank}',
local_shard.metadata.placement)
# Verify global metadata.
sharded_tensor_metadata = sharded_tensor.metadata()
shards_metadata = sharded_tensor_metadata.shards_metadata
self.assertEqual(2, len(shards_metadata))
for rank, shard_metadata in enumerate(shards_metadata):
self.assertEqual((rank * 5, 0), shard_metadata.shard_offsets)
self.assertEqual((5, 5), shard_metadata.shard_lengths)
self.assertEqual(f'rank:{rank}/cuda:{rank}',
shard_metadata.placement)
# Validate remote shards.
remote_shards = sharded_tensor.remote_shards
if self.rank <= 1:
self.assertEqual(1, len(remote_shards))
else:
self.assertEqual(2, len(remote_shards))
for rpc_rank, shards in remote_shards.items():
self.assertEqual(1, len(shards))
for remote_shard in shards:
self.assertEqual(rpc_rank, remote_shard.owner().id)
shard = remote_shard.to_here()
self.assertEqual((5, 5), shard.tensor.size())
def test_multiple_local_shards(self):
self.init_pg()
spec = EnumerableShardingSpec([
ShardMetadata(
shard_offsets=[0, 0],
shard_lengths=[5, 5],
placement="rank:0/cuda:0",
),
ShardMetadata(
shard_offsets=[0, 5],
shard_lengths=[5, 5],
placement="rank:1/cuda:1",
),
ShardMetadata(
shard_offsets=[5, 0],
shard_lengths=[5, 5],
placement="rank:0/cuda:0",
),
ShardMetadata(
shard_offsets=[5, 5],
shard_lengths=[5, 5],
placement="rank:1/cuda:1",
)
])
sharded_tensor = _sharded_tensor.empty(spec, 10, 10)
self.assertEqual((10, 10), sharded_tensor.size())
if self.rank <= 1:
self.assertEqual(2, len(sharded_tensor.local_shards()))
# Verify local shards.
for idx, local_shard in enumerate(sharded_tensor.local_shards()):
self.assertEqual(torch.device(f'cuda:{self.rank}'),
local_shard.tensor.device)
self.assertEqual((5, 5), local_shard.tensor.size())
# Verify local shard metadata.
self.assertEqual((idx * 5, self.rank * 5),
local_shard.metadata.shard_offsets)
self.assertEqual((5, 5), local_shard.metadata.shard_lengths)
self.assertEqual(f'rank:{self.rank}/cuda:{self.rank}',
local_shard.metadata.placement)
else:
self.assertEqual(0, len(sharded_tensor.local_shards()))
# Verify global metadata.
sharding_metadata = sharded_tensor.sharding_metadata()
self.assertEqual(4, len(sharding_metadata))
for shard_rank, shard_metadata in enumerate(sharding_metadata):
self.assertEqual((shard_rank // 2 * 5, (shard_rank % 2) * 5),
shard_metadata.shard_offsets)
self.assertEqual((5, 5), shard_metadata.shard_lengths)
self.assertEqual(f'rank:{shard_rank % 2}/cuda:{shard_rank % 2}',
shard_metadata.placement)
def test_new_group(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:1/cuda:2",
"rank:2/cuda:3",
],
)
pg = dist.new_group(ranks=[1, 2, 3])
if self.rank >= 1:
sharded_tensor = _sharded_tensor.empty(spec,
10,
20,
process_group=pg)
# Validate local shard.
local_shards = sharded_tensor.local_shards()
if self.rank >= 2:
self.assertEqual(1, len(local_shards))
local_shard = local_shards[0].tensor
self.assertEqual(torch.device(f"cuda:{self.rank}"),
local_shard.device)
self.assertEqual((5, 20), local_shard.size())
else:
self.assertEqual(0, len(local_shards))
# Validate global metadata.
sharded_tensor_metadata = sharded_tensor.metadata()
shards_metadata = sharded_tensor_metadata.shards_metadata
self.assertEqual(2, len(shards_metadata))
for shard_rank, shard_metadata in enumerate(shards_metadata):
self.assertEqual([shard_rank * 5, 0],
shard_metadata.shard_offsets)
self.assertEqual([5, 20], shard_metadata.shard_lengths)
self.assertEqual(
f'rank:{shard_rank + 1}/cuda:{shard_rank + 2}',
shard_metadata.placement)
# Validate remote shards.
remote_shards = sharded_tensor.remote_shards
if self.rank >= 2:
self.assertEqual(1, len(remote_shards))
else:
self.assertEqual(2, len(remote_shards))
for rpc_rank, shards in remote_shards.items():
self.assertEqual(1, len(shards))
for remote_shard in shards:
shard = remote_shard.to_here()
self.assertEqual(rpc_rank, remote_shard.owner().id)
self.assertEqual(f'rank:{rpc_rank - 1}/cuda:{rpc_rank}',
shard.metadata.placement)
self.assertEqual((5, 20), shard.tensor.size())
def test_complete_world_size(self):
for dim in [0, -2]:
spec = ChunkShardingSpec(
dim=dim,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
sharded_tensor = _sharded_tensor.empty(spec, 10, 20)
# Validate local shard.
local_shards = sharded_tensor.local_shards()
self.assertEqual(1, len(local_shards))
local_shard = local_shards[0].tensor
self.assertEqual(torch.device(f"cuda:{self.rank}"),
local_shard.device)
if self.rank == 3:
self.assertEqual((1, 20), local_shard.size())
else:
self.assertEqual((3, 20), local_shard.size())
# Validate global metadata.
sharded_tensor_metadata = sharded_tensor.metadata()
shards_metadata = sharded_tensor_metadata.shards_metadata
self.assertEqual(4, len(shards_metadata))
for rank, shard_metadata in enumerate(shards_metadata):
self.assertEqual([rank * 3, 0], shard_metadata.shard_offsets)
if rank == 3:
self.assertEqual([1, 20], shard_metadata.shard_lengths)
else:
self.assertEqual([3, 20], shard_metadata.shard_lengths)
self.assertEqual(f'rank:{rank}/cuda:{rank}',
shard_metadata.placement)
# Validate remote shards.
remote_shards = sharded_tensor.remote_shards
self.assertEqual(3, len(remote_shards))
for rpc_rank, shards in remote_shards.items():
self.assertEqual(1, len(shards))
for remote_shard in shards:
self.assertEqual(rpc_rank, remote_shard.owner().id)
shard = remote_shard.to_here()
self.assertEqual(f'rank:{rpc_rank}/cuda:{rpc_rank}',
shard.metadata.placement)
if rpc_rank == 3:
self.assertEqual((1, 20), shard.tensor.size())
else:
self.assertEqual((3, 20), shard.tensor.size())
def test_grid_sharding(self):
self.init_pg()
spec = EnumerableShardingSpec([
ShardMetadata(
shard_offsets=[0, 0],
shard_lengths=[5, 5],
placement="rank:0/cuda:0",
),
ShardMetadata(
shard_offsets=[0, 5],
shard_lengths=[5, 5],
placement="rank:1/cuda:1",
),
ShardMetadata(
shard_offsets=[5, 0],
shard_lengths=[5, 5],
placement="rank:2/cuda:2",
),
ShardMetadata(
shard_offsets=[5, 5],
shard_lengths=[5, 5],
placement="rank:3/cuda:3",
)
])
sharded_tensor = _sharded_tensor.empty(spec, 10, 10)
self.assertEqual((10, 10), sharded_tensor.size())
self.assertEqual(1, len(sharded_tensor.local_shards()))
# Verify local shard.
local_shard = sharded_tensor.local_shards()[0]
self.assertEqual(torch.device(f'cuda:{self.rank}'),
local_shard.tensor.device)
self.assertEqual((5, 5), local_shard.tensor.size())
# Verify local shard metadata.
self.assertEqual((self.rank // 2 * 5, (self.rank % 2) * 5),
local_shard.metadata.shard_offsets)
self.assertEqual((5, 5), local_shard.metadata.shard_lengths)
self.assertEqual(f'rank:{self.rank}/cuda:{self.rank}',
local_shard.metadata.placement)
# Verify global metadata.
sharding_metadata = sharded_tensor.sharding_metadata()
self.assertEqual(4, len(sharding_metadata))
for rank, shard_metadata in enumerate(sharding_metadata):
self.assertEqual((rank // 2 * 5, (rank % 2) * 5),
shard_metadata.shard_offsets)
self.assertEqual((5, 5), shard_metadata.shard_lengths)
self.assertEqual(f'rank:{rank}/cuda:{rank}',
shard_metadata.placement)
def test_multiple_local_shards(self):
spec = ChunkShardingSpec(
dim=0,
placements=[
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
"rank:0/cuda:0",
"rank:1/cuda:1",
"rank:2/cuda:2",
"rank:3/cuda:3",
],
)
sharded_tensor = _sharded_tensor.empty(spec, 16, 20)
# Validate local shards.
local_shards = sharded_tensor.local_shards()
self.assertEqual(2, len(local_shards))
for local_shard in local_shards:
self.assertEqual(torch.device(f"cuda:{self.rank}"),
local_shard.tensor.device)
self.assertEqual((2, 20), local_shard.tensor.size())
# Validate global metadata.
sharded_tensor_metadata = sharded_tensor.metadata()
shards_metadata = sharded_tensor_metadata.shards_metadata
self.assertEqual(8, len(shards_metadata))
for shard_idx, shard_metadata in enumerate(shards_metadata):
self.assertEqual([shard_idx * 2, 0], shard_metadata.shard_offsets)
self.assertEqual([2, 20], shard_metadata.shard_lengths)
self.assertEqual(f'rank:{shard_idx % 4}/cuda:{shard_idx % 4}',
shard_metadata.placement)
# Validate remote shards.
remote_shards = sharded_tensor.remote_shards
self.assertEqual(3, len(remote_shards))
owners = {}
for rpc_rank, shards in remote_shards.items():
self.assertEqual(2, len(shards))
for remote_shard in shards:
shard = remote_shard.to_here()
self.assertEqual((2, 20), shard.tensor.size())
self.assertEqual(rpc_rank, remote_shard.owner().id)
