async def async_deserialize(mesh,
mesh_axes,
tensorstore_spec,
global_shape=None):
t = ts.open(ts.Spec(tensorstore_spec), open=True).result()
shape = t.shape if global_shape is None else global_shape
requires_padding = prod(shape) > prod(t.shape)
if requires_padding:
new_shard_shape = gda.get_shard_shape(shape, mesh, mesh_axes)
async def cb(index):
if requires_padding:
# This is needed because the shape the array was saved with is smaller
# than the requested shape of the array in which it will be reloaded. So
# the extra values will be filled with 0s.
out = np.zeros(new_shard_shape, dtype=t.dtype.numpy_dtype)
requested_domain = ts.IndexTransform(
input_shape=shape)[index].domain
restricted_domain = t.domain.intersect(requested_domain)
await ts.array(out)[ts.d[:].translate_to[requested_domain.origin]
][restricted_domain].write(t[restricted_domain]
)
return out
else:
return await t[index].read()
return await create_async_gda_from_callback(shape, mesh, mesh_axes, cb)
async def async_deserialize(mesh,
mesh_axes,
tensorstore_spec,
global_shape=None):
t = ts.open(ts.Spec(tensorstore_spec), open=True).result()
shape = t.shape if global_shape is None else global_shape
new_shard_shape = gda.get_shard_shape(shape, mesh, mesh_axes)
async def cb(index):
out = np.zeros(new_shard_shape, dtype=t.dtype.numpy_dtype)
requested_domain = ts.IndexTransform(input_shape=shape)[index].domain
restricted_domain = t.domain.intersect(requested_domain)
await ts.array(out)[ts.d[:].translate_to[requested_domain.origin]
][restricted_domain].write(t[restricted_domain])
return out
return await create_async_gda_from_callback(shape, mesh, mesh_axes, cb)
def test_gda_shape_0_1d_mesh(self):
global_mesh = jtu.create_global_mesh((8,), ('x'))
global_input_shape = (0,)
mesh_axes = P(None)
def cb(index):
return np.array([])
gda = GlobalDeviceArray.from_callback(global_input_shape, global_mesh,
mesh_axes, cb)
self.assertEqual(gda.ndim, 1)
self.assertEqual(gda.size, 0)
for i, s in enumerate(gda.local_shards):
self.assertEqual(s.index, (slice(None),))
self.assertEqual(s.replica_id, i)
self.assertArraysEqual(s.data.to_py(), np.array([]))
self.assertEqual(gda.dtype, np.float32)
self.assertEqual(
gda_lib.get_shard_shape(global_input_shape, global_mesh, mesh_axes),
(0,))