def _pad_channels_dim(tensor, size):
channels_dim = tensor.shape.dims[-1]
if channels_dim.size > size:
raise ValueError("Cannot pad to size of {} when the original size "
"of {} is bigger".format(size, channels_dim.size))
elif channels_dim.size == size:
return tensor
else:
return mtf.pad(tensor, [0, size - channels_dim.size], channels_dim.name)
def halo_reduce(x, blocks_dim, block_size_dim, halo_size, wrap=True):
"""Reduce each block with the margins of adjacent blocks.
Get left and right blocks_dim and sum overlap along block_size_dim.
Only supports halo size smaller than block_size/2
Args:
x: a Tensor.
blocks_dim: a Dimension in x.shape
block_size_dim: a Dimension in x.shape
halo_size: an integer
wrap: a boolean
Returns:
a Tensor with the same shape as x, other than in block_size_dim, whose
size is increased by 2*halo_size.
"""
if halo_size == 0:
return x
block_size = block_size_dim.size
assert halo_size <= block_size // 2
left_margin = mtf.slice(x, 0, 2 * halo_size, block_size_dim.name)
right_margin = mtf.slice(x, block_size_dim.size - 2 * halo_size,
2 * halo_size, block_size_dim.name)
center = mtf.slice(x, 2 * halo_size, block_size_dim.size - 4 * halo_size,
block_size_dim.name)
# Perform halo exchange sum margins
left = mtf.shift(right_margin, 1, blocks_dim, wrap) + left_margin
right = mtf.shift(left_margin, -1, blocks_dim, wrap) + right_margin
# Recompose block
left = mtf.pad(left, [0, block_size_dim.size - 2 * halo_size],
block_size_dim.name)
right = mtf.pad(right, [block_size_dim.size - 2 * halo_size, 0],
block_size_dim.name)
center = mtf.pad(center, [2 * halo_size, 2 * halo_size],
block_size_dim.name)
x = left + center + right
return x
def lpt_init_single(lr_field, a0, kvec_lr, halo_size, lr_shape, hr_shape, part_shape, antialias=True, order=1, post_filtering=True, cosmology=Planck15):
a = a0
batch_dim = lr_field.shape[0]
lnc = lr_shape[-1].size
# Create particles on the high resolution grid
mstate = mesh_ops.mtf_indices(lr_field.mesh, shape=part_shape, dtype=tf.float32)
X = mtf.einsum([mtf.ones(lr_field.mesh, [batch_dim]), mstate], output_shape=[batch_dim] + mstate.shape[:])
k_dims_lr = [d.shape[0] for d in kvec_lr]
k_dims_lr = [k_dims_lr[2], k_dims_lr[0], k_dims_lr[1]]
lr_kfield = mesh_utils.r2c3d(lr_field, k_dims_lr)
grad_kfield_lr = mesh_kernels.apply_gradient_laplace_kernel(lr_kfield, kvec_lr)
# Reorder the low res FFTs which where transposed# y,z,x
grad_kfield_lr = [grad_kfield_lr[2], grad_kfield_lr[0], grad_kfield_lr[1]]
displacement = []
for f in grad_kfield_lr:
f = mesh_utils.c2r3d(f, lr_shape[-3:])
f = mtf.slicewise(lambda x:tf.expand_dims(tf.expand_dims(tf.expand_dims(x, axis=1),axis=1),axis=1),
[f],
output_dtype=tf.float32,
output_shape=mtf.Shape(hr_shape[0:4]+[
mtf.Dimension('sx_block', lnc//hr_shape[1].size),
mtf.Dimension('sy_block', lnc//hr_shape[2].size),
mtf.Dimension('sz_block', lnc//hr_shape[3].size)]),
name='my_reshape',
splittable_dims=lr_shape[:-1]+hr_shape[1:4]+part_shape[1:3])
for block_size_dim in hr_shape[-3:]:
f = mtf.pad(f, [halo_size, halo_size], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], f.shape[-3:]):
f = mesh_ops.halo_reduce(f, blocks_dim, block_size_dim, halo_size)
d = mesh_utils.cic_readout(f, X, halo_size)
displacement.append(d)
# Readout to particle positions
displacement = mtf.stack([ d for d in displacement],"ndim",axis=4)
pt = PerturbationGrowth(cosmology, a=[a], a_normalize=1.0)
DX = pt.D1(a) * displacement
P = (a ** 2 * pt.f1(a) * pt.E(a)) * DX
F = (a ** 2 * pt.E(a) * pt.gf(a) / pt.D1(a)) * DX
# TODO: Implement 2nd order LPT
# Moves the particles according to displacement
X = X + DX
return X, P, F
def fr_to_hr(field, hr_shape, halo_size, splittables, mesh):
# Reshaping array into high resolution mesh
field = mtf.slicewise(lambda x:tf.expand_dims(tf.expand_dims(tf.expand_dims(x, axis=1),axis=1),axis=1),
[field],
output_dtype=field.dtype,
output_shape=hr_shape,
name='my_reshape',
splittable_dims=splittables)
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mesh_ops.halo_reduce(field, blocks_dim, block_size_dim, halo_size)
return field
def test_sampling():
graph = mtf.Graph()
mesh = mtf.Mesh(graph, "my_mesh")
batch_dim = mtf.Dimension("batch", 1)
sequence_dim = mtf.Dimension("sequence", 1)
inputs = mtf.ones(mesh, mtf.Shape((batch_dim, sequence_dim)), tf.int32)
inputs = mtf.pad(inputs, [0, 3], sequence_dim.name)
# create mask
seq_len = params["n_ctx"]
num_mem_kv = params.get('num_mem_kv', 0)
length_dim = mtf.Dimension('sequence', seq_len)
memory_length_dim = mtf.Dimension('memory_length', seq_len + num_mem_kv)
embed_sequence_dim = mtf.Dimension('embed_sequence', seq_len)
embd_dim = mtf.Dimension("embd", params["n_embd"])
vocab_dim = mtf.Dimension("vocab", params["n_vocab"])
other_features = {}
other_features["attn_bias"] = biasmask_attn_weights(
mesh, length_dim, memory_length_dim, mtf.VariableDType(tf.float32))
other_features["embd_dim"] = embd_dim
other_features["vocab_dim"] = vocab_dim
other_features["embed_sequence_dim"] = embed_sequence_dim
other_features["memory_length_dim"] = memory_length_dim
params["mode"] = "predict"
with not_raises(Exception):
samples = sample_autoregressive(
inputs,
other_features=other_features,
params=params,
variable_dtype=mtf.VariableDType(),
remove_partial_sequences=params["remove_partial_sequences"],
stop_at_token=params["eos_id"],
sampling_use_entmax=True)
mesh_impl = placement_mesh_impl.PlacementMeshImpl(shape=[],
layout={},
devices=[""])
lowering = mtf.Lowering(graph, {mesh: mesh_impl})
samples = lowering.export_to_tf_tensor(samples)
def cic_readout_fr(field, state, hr_shape, halo_size, splittables, mesh):
'''readout from at the position from state on a field of batch+3D tensor'''
lnc = field.shape[-1].size
field = mtf.slicewise(lambda x:tf.expand_dims(tf.expand_dims(tf.expand_dims(x, axis=1),axis=1),axis=1),
[field],
output_dtype=tf.float32,
output_shape=mtf.Shape(hr_shape[0:4]+[
mtf.Dimension('sx_block', lnc//hr_shape[1].size),
mtf.Dimension('sy_block', lnc//hr_shape[2].size),
mtf.Dimension('sz_block', lnc//hr_shape[3].size)]),
name='my_reshape',
splittable_dims=splittables)
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
#Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mesh_ops.halo_reduce(field, blocks_dim, block_size_dim, halo_size)
read = mesh_utils.cic_readout(field, state[0], halo_size)
return read
def cic_paint_fr(field, state, output_shape, hr_shape, halo_size, splittables, mesh, weights=None):
'''paint the position from state to a field of batch+3D tensor
Ops performed :
- reshape to hr_shape
- pad
- paint
- halo_reduce
- slice to remove pad
- reshape to output_shape
'''
lnc = field.shape[-1].size
field = mtf.slicewise(lambda x:tf.expand_dims(tf.expand_dims(tf.expand_dims(x, axis=1),axis=1),axis=1),
[field],
output_dtype=tf.float32,
output_shape=mtf.Shape(hr_shape[0:4]+[
mtf.Dimension('sx_block', lnc//hr_shape[1].size),
mtf.Dimension('sy_block', lnc//hr_shape[2].size),
mtf.Dimension('sz_block', lnc//hr_shape[3].size)]),
name='my_reshape',
splittable_dims=splittables)
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
field = mesh_utils.cic_paint(field, state[0], halo_size, weights)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mesh_ops.halo_reduce(field, blocks_dim, block_size_dim, halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
field = mtf.slice(field, halo_size, block_size_dim.size, block_size_dim.name)
field = mtf.slicewise(lambda x: x[:,0,0,0],
[field],
output_dtype=field.dtype,
output_shape=output_shape,
name='my_dumb_reshape',
splittable_dims=splittables)
return field
def force_single(state,
lr_shape,
hr_shape,
kvec_lr,
halo_size,
cosmology=Planck15,
pm_nc_factor=1,
**kwargs):
"""
Estimate force on the particles given a state.
Parameters:
-----------
state: tensor
Input state tensor of shape (3, batch_size, npart, 3)
boxsize: float
Size of the simulation volume (Mpc/h) TODO: check units
cosmology: astropy.cosmology
Cosmology object
pm_nc_factor: int
TODO: @modichirag please add doc
"""
X, P, F = state
#TODO: support different factor
assert pm_nc_factor == 1
lnc = lr_shape[-1].size
part_shape = X.shape
# Paint the particles on the high resolution mesh
field = mtf.zeros(X.mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
field = mesh_utils.cic_paint(field, X, halo_size)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mesh_ops.halo_reduce(field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
field = mtf.slice(field, halo_size, block_size_dim.size,
block_size_dim.name)
# Hack usisng custom reshape because mesh is pretty dumb
lr_field = mtf.slicewise(lambda x: x[:, 0, 0, 0], [field],
output_dtype=tf.float32,
output_shape=lr_shape,
name='my_dumb_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[:4])
k_dims_lr = [d.shape[0] for d in kvec_lr]
k_dims_lr = [k_dims_lr[2], k_dims_lr[0], k_dims_lr[1]]
lr_kfield = mesh_utils.r2c3d(lr_field, k_dims_lr)
kfield_lr = mesh_kernels.apply_gradient_laplace_kernel(lr_kfield, kvec_lr)
# Reorder the low res FFTs which where transposed# y,z,x
kfield_lr = [kfield_lr[2], kfield_lr[0], kfield_lr[1]]
displacement = []
for f in kfield_lr:
f = mesh_utils.c2r3d(f, lr_shape[-3:])
f = mtf.slicewise(
lambda x: tf.expand_dims(
tf.expand_dims(tf.expand_dims(x, axis=1), axis=1), axis=1),
[f],
output_dtype=tf.float32,
output_shape=mtf.Shape(hr_shape[0:4] + [
mtf.Dimension('sx_block', lnc // hr_shape[1].size),
mtf.Dimension('sy_block', lnc // hr_shape[2].size),
mtf.Dimension('sz_block', lnc // hr_shape[3].size)
]),
name='my_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[1:4] + part_shape[1:3])
for block_size_dim in hr_shape[-3:]:
f = mtf.pad(f, [halo_size, halo_size], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], f.shape[-3:]):
f = mesh_ops.halo_reduce(f, blocks_dim, block_size_dim, halo_size)
d = mesh_utils.cic_readout(f, X, halo_size)
displacement.append(d)
# Readout the force to particle positions
F = mtf.stack([d for d in displacement], "ndim", axis=4)
F = F * 1.5 * cosmology.Om0
return X, P, F
def force(state,
lr_shape,
hr_shape,
kvec_lr,
kvec_hr,
halo_size,
cosmology=Planck15,
downsampling_factor=2,
pm_nc_factor=1,
antialias=True,
**kwargs):
"""
Estimate force on the particles given a state.
Parameters:
-----------
state: tensor
Input state tensor of shape (3, batch_size, npart, 3)
boxsize: float
Size of the simulation volume (Mpc/h) TODO: check units
cosmology: astropy.cosmology
Cosmology object
pm_nc_factor: int
TODO: @modichirag please add doc
"""
X, P, F = state
#TODO: support different factor
assert pm_nc_factor == 1
lnc = lr_shape[-1].size
part_shape = X.shape
k_dims_lr = [d.shape[0] for d in kvec_lr]
k_dims_hr = [d.shape[0] for d in kvec_hr]
# Reorder the FFTs which where transposed# y,z,x
k_dims_lr = [k_dims_lr[2], k_dims_lr[0], k_dims_lr[1]]
k_dims_hr = [k_dims_hr[2], k_dims_hr[0], k_dims_hr[1]]
# Paint the particles on the high resolution mesh
field = mtf.zeros(X.mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
field = mesh_utils.cic_paint(field, X, halo_size)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mesh_ops.halo_reduce(field, blocks_dim, block_size_dim,
halo_size)
# Split the field into low and high resolution
field = mtf.reshape(field, field.shape + [mtf.Dimension('h_dim', 1)])
high = field
low = mesh_utils.downsample(field, downsampling_factor, antialias=True)
low = mtf.reshape(low, low.shape[:-1])
hr_field = mtf.reshape(high, high.shape[:-1])
for block_size_dim in hr_shape[-3:]:
low = mtf.slice(low, halo_size // 2**downsampling_factor,
block_size_dim.size // 2**downsampling_factor,
block_size_dim.name)
# Hack usisng custom reshape because mesh is pretty dumb
lr_field = mtf.slicewise(lambda x: x[:, 0, 0, 0], [low],
output_dtype=tf.float32,
output_shape=lr_shape,
name='my_dumb_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[:4])
lr_kfield = mesh_utils.r2c3d(lr_field, k_dims_lr)
hr_kfield = mesh_utils.r2c3d(hr_field, k_dims_hr)
kfield_lr = mesh_kernels.apply_longrange_kernel(lr_kfield,
kvec_lr,
r_split=0)
kfield_lr = mesh_kernels.apply_gradient_laplace_kernel(lr_kfield, kvec_lr)
kfield_hr = mesh_kernels.apply_longrange_kernel(hr_kfield,
kvec_hr,
r_split=0)
kfield_hr = mesh_kernels.apply_gradient_laplace_kernel(kfield_hr, kvec_hr)
# Reorder the low res FFTs which where transposed# y,z,x
kfield_lr = [kfield_lr[2], kfield_lr[0], kfield_lr[1]]
kfield_hr = [kfield_hr[2], kfield_hr[0], kfield_hr[1]]
displacement = []
for f, g in zip(kfield_lr, kfield_hr):
f = mesh_utils.c2r3d(f, lr_shape[-3:])
f = mtf.slicewise(
lambda x: tf.expand_dims(
tf.expand_dims(tf.expand_dims(x, axis=1), axis=1), axis=1),
[f],
output_dtype=tf.float32,
output_shape=mtf.Shape(hr_shape[0:4] + [
mtf.Dimension('sx_block', lnc // hr_shape[1].size),
mtf.Dimension('sy_block', lnc // hr_shape[2].size),
mtf.Dimension('sz_block', lnc // hr_shape[3].size)
]),
name='my_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[1:4] + part_shape[1:3])
for block_size_dim in hr_shape[-3:]:
f = mtf.pad(f, [
halo_size // 2**downsampling_factor,
halo_size // 2**downsampling_factor
], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], f.shape[-3:]):
f = mesh_ops.halo_reduce(f, blocks_dim, block_size_dim,
halo_size // 2**downsampling_factor)
f = mtf.reshape(f, f.shape + [mtf.Dimension('h_dim', 1)])
f = mesh_utils.upsample(f, downsampling_factor)
f = mtf.reshape(f, f.shape[:-1])
g = mesh_utils.c2r3d(g, f.shape[-3:])
high_shape = g.shape
# And now we remove the large scales
g = mtf.reshape(g, g.shape + [mtf.Dimension('h_dim', 1)])
_low = mesh_utils.downsample(g,
downsampling_factor,
antialias=antialias)
g = g - mtf.reshape(mesh_utils.upsample(_low, downsampling_factor),
g.shape)
g = mtf.reshape(g, high_shape)
d = mesh_utils.cic_readout(f + g, X, halo_size)
displacement.append(d)
# Readout the force to particle positions
F = mtf.stack([d for d in displacement], "ndim", axis=4)
F = F * 1.5 * cosmology.Om0
return X, P, F
def nbody_prototype(mesh,
infield=False,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps,
dtype=tf.float32):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
# Compute a few things first, using simple tensorflow
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
# Parameters of the large scales decomposition
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
tx_dim = mtf.Dimension("tx_lr", nc)
ty_dim = mtf.Dimension("ty_lr", nc)
tz_dim = mtf.Dimension("tz_lr", nc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin, shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
kx = mtf.import_tf_tensor(mesh,
kvec[0].squeeze().astype('float32'),
shape=[tfx_dim])
ky = mtf.import_tf_tensor(mesh,
kvec[1].squeeze().astype('float32'),
shape=[tfy_dim])
kz = mtf.import_tf_tensor(mesh,
kvec[2].squeeze().astype('float32'),
shape=[tfz_dim])
kv = [ky, kz, kx]
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([nc, nc, nc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32'),
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32'),
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32'),
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
# Begin simulation
## Compute initial initial conditions distributed
input_field = tf.placeholder(dtype, [batch_size, nc, nc, nc])
if infield:
initc = mtf.import_tf_tensor(mesh, input_field, shape=part_shape)
else:
initc = mtfpm.linear_field(mesh, shape, bs, nc, pk, kv)
# Here we can run our nbody
if FLAGS.nbody:
state = mtfpm.lpt_init_single(
initc,
a0,
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# Here we can run our nbody
final_state = mtfpm.nbody_single(state, stages, lr_shape, hr_shape,
kv_lr, halo_size)
else:
final_state = mtfpm.lpt_init_single(
initc,
stages[-1],
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=dtype,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
return initc, final_field, input_field
def my_model_fn(features, labels, mode, params=None, config=None):
"""Estimator model function.
Args:
features: dictionary where keys are strings like "inputs" and "targets"
and the values are the actual values of "inputs". See TPUEstimator's
docs for more information
labels: ignored argument
mode: a tf.estimator.ModeKeys
params: dictionary containing the key "context"
config: ignored argument
Returns:
a TPUEstimatorSpec
"""
del labels, config
global_step = tf.train.get_global_step()
if use_tpu and "context" in params:
ctx = params["context"]
num_hosts = ctx.num_hosts
host_placement_fn = ctx.tpu_host_placement_function
device_list = [
host_placement_fn(host_id=t) for t in range(num_hosts)
]
# TODO(ylc): Better estimation of replica cache size?
replica_cache_size = 300 * 1000000 # 300M per replica
# Worker 0 caches all the TPU binaries.
worker0_mem = replica_cache_size * ctx.num_replicas
devices_memeory_usage = [worker0_mem] + [0] * (num_hosts - 1)
var_placer = mtf.utils.BalancedVariablePlacer(
device_list, devices_memeory_usage)
# deprecated mesh_devices = [""] * mesh_shape.size
physical_shape = list(
params["context"].device_assignment.topology.mesh_shape)
logical_to_physical = mtf.simd_mesh_impl.auto_logical_to_physical_tpu(
mesh_shape.to_integer_list, physical_shape)
mesh_impl = mtf.simd_mesh_impl.SimdMeshImpl(
mesh_shape,
layout_rules,
mesh_devices,
ctx.device_assignment,
logical_to_physical=logical_to_physical)
else:
var_placer = None
# deprecated mesh_devices = [""] * mesh_shape.size
mesh_impl = mtf.placement_mesh_impl.PlacementMeshImpl(
mesh_shape, layout_rules, mesh_devices)
graph = mtf.Graph()
mesh = mtf.Mesh(graph, "my_mesh", var_placer)
mtf_features = {}
for key, x in features.items():
outer_batch_dim = mtf.Dimension("outer_batch", outer_batch_size)
batch_dim = mtf.Dimension("batch", batch_size // outer_batch_size)
# Some auxiliary features may have been generated in packing.
# The names of these new features are of the form
# "<original_feature_name>_<suffix>", e.g. "inputs_segmentation".
# We look up the lengths based on the original feature name, without
# the "_<suffix>".
feature_length = sequence_length[key.split("_")[0]]
length_dim = mtf.Dimension("length", feature_length)
ensemble_dims = ([mtf.Dimension("ensemble", ensemble_inputs)]
if ensemble_inputs else [])
feature_shape = mtf.Shape(ensemble_dims +
[outer_batch_dim, batch_dim, length_dim])
x = tf.cast(features[key], tf.int32)
x = tf.reshape(x, feature_shape.to_integer_list)
if not use_tpu:
tf.logging.info("feature %s : %s" % (key, x))
x = tf.Print(x, [x],
"import feature %s" % key,
summarize=1000,
first_n=10)
mtf_features[key] = mtf.import_fully_replicated(mesh,
x,
feature_shape,
name=key)
if key == "targets" or key == "codeprefixedtargets" or key == "controlcode":
anon_targets = mtf.anonymize(mtf_features[key])
if mode == tf.estimator.ModeKeys.PREDICT:
def _feature_shape(key):
feature_length = sequence_length[key.split("_")[0]]
return mtf.Shape([
mtf.Dimension("batch", batch_size),
mtf.Dimension("length", feature_length)
])
mtf_features = {
k: mtf.reshape(v, _feature_shape(k))
for k, v in six.iteritems(mtf_features)
}
inputs = mtf_features["inputs"]
if attribute_embedding:
attributes = mtf_features["attribute"]
else:
attributes = None
if has_partial_sequences:
controlcodes = mtf_features["controlcode"]
else:
controlcodes = None
if predict_fn:
mtf_samples = predict_fn(model=transformer_model,
features=mtf_features,
variable_dtype=get_variable_dtype())
elif isinstance(transformer_model, transformer.Unitransformer):
# pad so that there is enough room for the targets
inputs = mtf.pad(inputs, [0, sequence_length["targets"]],
length_dim.name)
mtf_samples = transformer_model.sample_autoregressive(
inputs,
variable_dtype=get_variable_dtype(),
remove_partial_sequences=True)
elif isinstance(transformer_model, Bitransformer_ll):
mtf_samples = transformer_model.decode(
inputs,
attributes=attributes,
controlcodes=controlcodes,
has_partial_sequences=has_partial_sequences,
remove_partial_sequences=remove_partial_sequences,
variable_dtype=get_variable_dtype()) #
elif isinstance(
transformer_model,
(transformer.Bitransformer, transformer.StudentTeacher)):
mtf_samples = transformer_model.decode(
inputs, variable_dtype=get_variable_dtype())
else:
raise ValueError("unrecognized class")
mtf_samples = mtf.anonymize(mtf_samples)
inputs = mtf.anonymize(inputs)
lowering = mtf.Lowering(graph, {mesh: mesh_impl},
autostack=autostack)
inputs = lowering.export_to_tf_tensor(inputs)
outputs = lowering.export_to_tf_tensor(mtf_samples)
predictions = {"inputs": inputs, "outputs": outputs}
# When exporting a model, we need to communicate to TF-Serving that
# master variables need to be copied to their slave slice variables.
# Estimator uses a Scaffold's "local_init_op" for this purpose, so we
# augment the default "local_init_op" here.
#
# The "ready_op" is also constructed here to ensure the variables
# initialized by "local_init_op" are the same ones checked by "ready_op".
#
# WARNING: Any variables created outside of this model_fn()
# (e.g. tpu_estimator/iterations_per_loop) will NOT be initialized nor
# checked by these ops.
def scaffold_fn():
return tf.train.Scaffold(
local_init_op=tf.group(
tf.train.Scaffold.default_local_init_op(),
lowering.copy_masters_to_slices(),
name="mtf_local_init_op"),
ready_op=tf.concat([
tf.report_uninitialized_variables(),
resources.report_uninitialized_resources()
],
axis=0,
name="mtf_ready_op"))
return tpu_estimator.TPUEstimatorSpec(
mode=tf.estimator.ModeKeys.PREDICT,
predictions=predictions,
scaffold_fn=scaffold_fn,
prediction_hooks=[mtf.MtfRestoreHook(lowering)])
assert (mode == tf.estimator.ModeKeys.TRAIN
or mode == tf.estimator.ModeKeys.EVAL)
def logits_and_loss(mtf_features):
"""Compute logits and loss.
Args:
mtf_features: a dictionary
Returns:
logits: a mtf.Tensor
loss: a mtf.Tensor
"""
if model_type == "lm": # TOTRY Adapt that to our case
if "inputs" in mtf_features:
mtf_features = _dynamic_text2self(mtf_features)
_, _, length_dim = mtf_features["targets"].shape
inputs = mtf.shift(mtf_features["targets"],
offset=1,
dim=length_dim,
wrap=False)
else:
inputs = mtf_features["inputs"]
if attribute_embedding:
attributes = mtf_features["attribute"]
else:
attributes = None
if control_codes:
codeprefixedtargets = mtf_features["codeprefixedtargets"]
else:
codeprefixedtargets = None
if isinstance(transformer_model, transformer.Unitransformer):
position_kwargs = dict(
sequence_id=mtf_features.get("targets_segmentation", None),
position=mtf_features.get("targets_position", None),
)
elif isinstance(transformer_model, transformer.Bitransformer
) or model_type == "bi_student_teacher":
if control_codes:
position_kwargs = dict(
encoder_sequence_id=mtf_features.get(
"inputs_segmentation", None),
decoder_sequence_id=mtf_features.get(
"codeprefixedtargets_segmentation", None),
decoder_subsequence_id=mtf_features.get(
"codeprefixedtargets_subsegmentation", None),
encoder_position=mtf_features.get(
"inputs_position", None),
decoder_position=mtf_features.get(
"codeprefixedtargets_position", None),
)
else:
position_kwargs = dict(
encoder_sequence_id=mtf_features.get(
"inputs_segmentation", None),
decoder_sequence_id=mtf_features.get(
"targets_segmentation", None),
decoder_subsequence_id=mtf_features.get(
"targets_subsegmentation", None),
encoder_position=mtf_features.get(
"inputs_position", None),
decoder_position=mtf_features.get(
"targets_position", None),
)
else:
raise ValueError("unrecognized class")
if isinstance(transformer_model, Bitransformer_ll):
if cycle_consistency_loss:
logits_ae, l_ae = transformer_model.call_simple(
inputs=inputs,
targets=mtf_features["targets"],
compute_loss=True,
attributes=attributes,
codeprefixedtargets=codeprefixedtargets,
mode=mode,
variable_dtype=get_variable_dtype(),
**position_kwargs)
if has_partial_sequences:
controlcodes = mtf_features["controlcode"]
else:
controlcodes = None
with gin.config_scope('training'):
mtf_samples = transformer_model.decode(
inputs,
attributes=attributes,
controlcodes=controlcodes,
has_partial_sequences=has_partial_sequences,
remove_partial_sequences=remove_partial_sequences,
variable_dtype=get_variable_dtype())
# mtf_samples = mtf.anonymize(mtf_samples)
outputs = mtf_samples
logits_cycle, l_cycle = transformer_model.call_simple(
inputs=outputs,
targets=mtf_features["targets"],
compute_loss=True,
attributes=attributes,
codeprefixedtargets=codeprefixedtargets,
mode=mode,
variable_dtype=get_variable_dtype(),
**position_kwargs)
loss_ae_cycle = lambda_ae * l_ae + lambda_cycle * l_cycle
return logits_cycle, loss_ae_cycle
else:
return transformer_model.call_simple(
inputs=inputs,
targets=mtf_features["targets"],
compute_loss=True,
attributes=attributes,
codeprefixedtargets=codeprefixedtargets,
mode=mode,
variable_dtype=get_variable_dtype(),
**position_kwargs)
else:
return transformer_model.call_simple(
inputs=inputs,
targets=mtf_features["targets"],
compute_loss=True,
mode=mode,
variable_dtype=get_variable_dtype(),
num_microbatches=num_microbatches,
**position_kwargs)
if mode == tf.estimator.ModeKeys.TRAIN:
num_microbatches = serialize_num_microbatches(
batch_dim, sequence_length, mesh_shape, layout_rules)
if num_microbatches > 1:
def serialized_fn(mtf_features):
return {
"loss":
(logits_and_loss(mtf_features)[1] / num_microbatches)
}
var_grads, loss_dict = mtf.serialize_training_step(
mtf_features, serialized_fn, batch_dim, num_microbatches)
loss = loss_dict["loss"]
else:
loss = logits_and_loss(mtf_features)[1]
var_grads = mtf.gradients(
[loss], [v.outputs[0] for v in graph.trainable_variables])
if tpu_summaries:
mtf.scalar_summary("loss", loss)
if callable(learning_rate_schedule):
# the following happens on CPU since TPU can't handle summaries.
with mtf.utils.outside_all_rewrites():
learning_rate = learning_rate_schedule(
step=tf.train.get_global_step())
tf.summary.scalar("learning_rate", learning_rate)
else:
learning_rate = learning_rate_schedule
if isinstance(variable_filter, str):
pattern = re.compile(variable_filter)
variable_filter_fn = lambda v: pattern.search(v.name)
elif variable_filter is None:
variable_filter_fn = lambda v: True
elif callable(variable_filter):
variable_filter_fn = variable_filter
else:
raise ValueError(
"variable_filter must be None, a string, or a callable function"
)
trainable_vars = [
v for v in graph.trainable_variables if variable_filter_fn(v)
]
trainable_var_grads = [
g for g, v in zip(var_grads, graph.trainable_variables)
if variable_filter_fn(v)
]
if len(trainable_vars) != len(graph.trainable_variables):
tf.logging.info("Variables being trained:")
tf.logging.info([v.name for v in trainable_vars])
tf.logging.info("Variables not being trained:")
tf.logging.info([
v.name for v in graph.trainable_variables
if not variable_filter_fn(v)
])
update_ops = optimizer(learning_rate=learning_rate).apply_grads(
trainable_var_grads, trainable_vars)
lowering = mtf.Lowering(graph, {mesh: mesh_impl},
autostack=autostack)
tf_loss = lowering.export_to_tf_tensor(loss)
tf_loss = tf.cast(tf_loss, tf.float32)
if not use_tpu:
tf_loss = tf.Print(
tf_loss, [tf_loss, tf.train.get_global_step()],
"step, tf_loss")
tf_update_ops = [
lowering.lowered_operation(op) for op in update_ops
]
tf_update_ops.append(tf.assign_add(global_step, 1))
train_op = tf.group(tf_update_ops)
if hasattr(transformer_model, "initialize"):
with mtf.utils.outside_all_rewrites():
transformer_model.initialize()
if tpu_summaries:
# has to be outside of
# with mtf.utils.outside_all_rewrites()
host_call = mtf.utils.create_host_call(model_dir)
mtf.utils.remove_summaries()
else:
host_call = None
with mtf.utils.outside_all_rewrites():
if init_checkpoint:
ckpt_vars = {
v
for v, _ in tf.train.list_variables(init_checkpoint)
}
global_vars = {v.op.name for v in tf.global_variables()}
restore_vars = ckpt_vars.intersection(global_vars)
tf.logging.info("Initializing variables from %s:",
init_checkpoint)
tf.logging.debug("\n".join(sorted(restore_vars)))
tf.logging.info("Variables in %s but not in graph:",
init_checkpoint)
tf.logging.info("\n".join(sorted(ckpt_vars - global_vars)))
tf.logging.info("Variables in graph but not in %s:",
init_checkpoint)
tf.logging.info("\n".join(sorted(global_vars - ckpt_vars)))
tf.train.init_from_checkpoint(init_checkpoint,
{v: v
for v in restore_vars})
# Copy master variables to slices. Must be called first.
restore_hook = mtf.MtfRestoreHook(lowering)
saver = tf.train.Saver(tf.global_variables(),
sharded=True,
max_to_keep=keep_checkpoint_max,
keep_checkpoint_every_n_hours=2,
defer_build=False,
save_relative_paths=True)
tf.add_to_collection(tf.GraphKeys.SAVERS, saver)
saver_listener = mtf.MtfCheckpointSaverListener(lowering)
saver_hook = tf.train.CheckpointSaverHook(
model_dir,
save_steps=save_checkpoints_steps,
saver=saver,
listeners=[saver_listener])
gin_config_saver_hook = gin.tf.GinConfigSaverHook(
model_dir,
summarize_config=True,
include_step_in_filename=False)
if use_tpu:
return tpu_estimator.TPUEstimatorSpec(
mode=tf.estimator.ModeKeys.TRAIN,
loss=tf_loss,
train_op=train_op,
host_call=host_call,
training_hooks=[
restore_hook,
saver_hook,
gin_config_saver_hook,
])
else:
return tf.estimator.EstimatorSpec(
tf.estimator.ModeKeys.TRAIN,
loss=tf_loss,
train_op=train_op,
training_chief_hooks=[
restore_hook,
saver_hook,
gin_config_saver_hook,
])
elif mode == tf.estimator.ModeKeys.EVAL:
logits, loss = logits_and_loss(mtf_features)
anon_logits = mtf.anonymize(logits)
lowering = mtf.Lowering(graph, {mesh: mesh_impl},
autostack=autostack)
tf_loss = tf.cast(lowering.export_to_tf_tensor(loss), tf.float32)
tf_loss = tf.cast(tf_loss, tf.float32)
tf_logits = tf.cast(lowering.export_to_tf_tensor(anon_logits),
tf.float32)
def simple_metrics(logits, labels):
"""Simple metrics for teacher-forced eval."""
weights = tf.cast(tf.not_equal(labels, 0), tf.float32)
xent = tf.nn.sparse_softmax_cross_entropy_with_logits(
labels=labels, logits=logits)
predictions = tf.cast(tf.argmax(logits, axis=-1), labels.dtype)
token_correct = tf.cast(tf.equal(predictions, labels),
tf.float32) * weights
sequence_correct = tf.to_float(
tf.equal(tf.reduce_sum(token_correct, -1),
tf.reduce_sum(weights, -1)))
sequence_weights = tf.to_float(
tf.not_equal(tf.reduce_sum(weights, -1), 0))
return {
"neg_log_perplexity":
tf.metrics.mean(-xent, weights),
"token_accuracy":
tf.metrics.mean(token_correct, weights),
"sequence_accuracy":
tf.metrics.mean(sequence_correct, sequence_weights)
}
labels = lowering.export_to_tf_tensor(anon_targets)
eval_metrics = (simple_metrics, [tf_logits, labels])
with mtf.utils.outside_all_rewrites():
restore_hook = mtf.MtfRestoreHook(lowering)
return tpu_estimator.TPUEstimatorSpec(
tf.estimator.ModeKeys.EVAL,
evaluation_hooks=[restore_hook],
loss=tf_loss,
eval_metrics=eval_metrics)
def nbody_fn(mesh,
klin,
plin,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps,
dtype=tf.float32):
""" Pyramid N-body function
"""
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
# Parameters of the large scales decomposition
downsampling_factor = FLAGS.dsample
lnc = nc // 2**downsampling_factor
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
# Dimensions of the low resolution grid
x_dim = mtf.Dimension("nx_lr", lnc)
y_dim = mtf.Dimension("ny_lr", lnc)
z_dim = mtf.Dimension("nz_lr", lnc)
tx_dim = mtf.Dimension("tx_lr", lnc)
ty_dim = mtf.Dimension("ty_lr", lnc)
tz_dim = mtf.Dimension("tz_lr", lnc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
batch_dim = mtf.Dimension("batch", batch_size)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype('float32'), shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
kx = mtf.import_tf_tensor(
mesh, kvec[0].squeeze().astype('float32'), shape=[tfx_dim])
ky = mtf.import_tf_tensor(
mesh, kvec[1].squeeze().astype('float32'), shape=[tfy_dim])
kz = mtf.import_tf_tensor(
mesh, kvec[2].squeeze().astype('float32'), shape=[tfz_dim])
kv = [ky, kz, kx]
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([lnc, lnc, lnc], symmetric=False)
kx_lr = mtf.import_tf_tensor(
mesh,
kvec_lr[0].squeeze().astype('float32') / 2**downsampling_factor,
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(
mesh,
kvec_lr[1].squeeze().astype('float32') / 2**downsampling_factor,
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(
mesh,
kvec_lr[2].squeeze().astype('float32') / 2**downsampling_factor,
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
# kvec for high resolution blocks
padded_sx_dim = mtf.Dimension('padded_sx_block',
nc // n_block_x + 2 * halo_size)
padded_sy_dim = mtf.Dimension('padded_sy_block',
nc // n_block_y + 2 * halo_size)
padded_sz_dim = mtf.Dimension('padded_sz_block',
nc // n_block_z + 2 * halo_size)
kvec_hr = flowpm.kernels.fftk([
nc // n_block_x + 2 * halo_size, nc // n_block_y + 2 * halo_size,
nc // n_block_z + 2 * halo_size
],
symmetric=False)
kx_hr = mtf.import_tf_tensor(
mesh, kvec_hr[0].squeeze().astype('float32'), shape=[padded_sx_dim])
ky_hr = mtf.import_tf_tensor(
mesh, kvec_hr[1].squeeze().astype('float32'), shape=[padded_sy_dim])
kz_hr = mtf.import_tf_tensor(
mesh, kvec_hr[2].squeeze().astype('float32'), shape=[padded_sz_dim])
kv_hr = [ky_hr, kz_hr, kx_hr]
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, x_dim, y_dim, z_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
# Compute initial initial conditions distributed
initc = mtfpm.linear_field(mesh, shape, bs, nc, pk, kv)
# Reshaping array into high resolution mesh
field = mtf.slicewise(
lambda x: tf.expand_dims(
tf.expand_dims(tf.expand_dims(x, axis=1), axis=1), axis=1), [initc],
output_dtype=tf.float32,
output_shape=hr_shape,
name='my_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[1:4] + part_shape[1:3])
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mpm.halo_reduce(field, blocks_dim, block_size_dim, halo_size)
field = mtf.reshape(field, field.shape + [mtf.Dimension('h_dim', 1)])
high = field
low = mesh_utils.downsample(field, downsampling_factor, antialias=True)
low = mtf.reshape(low, low.shape[:-1])
high = mtf.reshape(high, high.shape[:-1])
for block_size_dim in hr_shape[-3:]:
low = mtf.slice(low, halo_size // 2**downsampling_factor,
block_size_dim.size // 2**downsampling_factor,
block_size_dim.name)
# Hack usisng custom reshape because mesh is pretty dumb
low = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [low],
output_dtype=tf.float32,
output_shape=lr_shape,
name='my_dumb_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[:4])
state = mtfpm.lpt_init(
low,
high,
0.1,
kv_lr,
kv_hr,
halo_size,
hr_shape,
lr_shape,
part_shape[1:],
downsampling_factor=downsampling_factor,
antialias=True,
)
final_state = mtfpm.nbody(
state,
stages,
lr_shape,
hr_shape,
kv_lr,
kv_hr,
halo_size,
downsampling_factor=downsampling_factor)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4], final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=tf.float32,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
return initc, final_field
def benchmark_model(mesh):
"""
Initializes a 3D volume with random noise, and execute a forward FFT
"""
# Setup parameters
bs = FLAGS.box_size
nc = FLAGS.cube_size
batch_size = FLAGS.batch_size
a0 = FLAGS.a0
a = 1.0
nsteps = FLAGS.pm_steps
# Compute a few things first, using simple tensorflow
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Initialize the integration steps
stages = np.linspace(FLAGS.a0, 1.0, FLAGS.pm_steps, endpoint=True)
# Generate a batch of 3D initial conditions
initial_conditions = flowpm.linear_field(
nc, # size of the cube
bs, # Physical size of the cube
ipklin, # Initial power spectrum
batch_size=batch_size)
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
from flowpm.kernels import laplace_kernel, gradient_kernel
lap = tf.cast(laplace_kernel(kvec), tf.complex64)
grad_x = gradient_kernel(kvec, 0)
grad_y = gradient_kernel(kvec, 1)
grad_z = gradient_kernel(kvec, 2)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = 8
n_block_y = 4
n_block_z = 1
halo_size = 4
# Parameters of the large scales decomposition
downsampling_factor = 2
lnc = nc // 2**downsampling_factor
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
# Dimensions of the low resolution grid
tx_dim = mtf.Dimension("tx_lr", nc)
ty_dim = mtf.Dimension("ty_lr", nc)
tz_dim = mtf.Dimension("tz_lr", nc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
batch_dim = mtf.Dimension("batch", batch_size)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype('float32'), shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
kx = mtf.import_tf_tensor(mesh,
kvec[0].squeeze().astype('float32'),
shape=[tfx_dim])
ky = mtf.import_tf_tensor(mesh,
kvec[1].squeeze().astype('float32'),
shape=[tfy_dim])
kz = mtf.import_tf_tensor(mesh,
kvec[2].squeeze().astype('float32'),
shape=[tfz_dim])
kv = [ky, kz, kx]
kvec_lr = flowpm.kernels.fftk([nc, nc, nc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32'),
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32'),
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32'),
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
# kvec for high resolution blocks
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
initc = mtfpm.linear_field(mesh, shape, bs, nc, pk, kv)
state = mtfpm.lpt_init_single(
initc,
a0,
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
#state = mtfpm.lpt_init(low, high, 0.1, kv_lr, kv_hr, halo_size, hr_shape, lr_shape,
# part_shape[1:], downsampling_factor=downsampling_factor, antialias=True,)
# Here we can run our nbody
final_state = state #mtfpm.nbody(state, stages, lr_shape, hr_shape, kv_lr, kv_hr, halo_size, downsampling_factor=downsampling_factor)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4], final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
#final_field = mtf.reshape(final_field, [batch_dim, fx_dim, fy_dim, fz_dim])
# Hack usisng custom reshape because mesh is pretty dumb
final_field = mtf.slicewise(lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=tf.float32,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
return mtf.reduce_sum(final_field)
def lpt_prototype(mesh,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
if halo_size >= 0.5 * min(nc // n_block_x, nc // n_block_y,
nc // n_block_z):
new_size = int(0.5 *
min(nc // n_block_x, nc // n_block_y, nc // n_block_z))
print('WARNING: REDUCING HALO SIZE from %d to %d' %
(halo_size, new_size))
halo_size = new_size
# Parameters of the large scales decomposition
downsampling_factor = 0
lnc = nc // 2**downsampling_factor
#
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
tx_dim = mtf.Dimension("tx_lr", nc)
ty_dim = mtf.Dimension("ty_lr", nc)
tz_dim = mtf.Dimension("tz_lr", nc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype('float32'), shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
kx = mtf.import_tf_tensor(mesh,
kvec[0].squeeze().astype('float32'),
shape=[tfx_dim])
ky = mtf.import_tf_tensor(mesh,
kvec[1].squeeze().astype('float32'),
shape=[tfy_dim])
kz = mtf.import_tf_tensor(mesh,
kvec[2].squeeze().astype('float32'),
shape=[tfz_dim])
kv = [ky, kz, kx]
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([nc, nc, nc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32'),
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32'),
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32'),
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
# Begin simulation
initc = mtfpm.linear_field(mesh, shape, bs, nc, pk, kv)
# # Reshaping array into high resolution mesh
# field = mtf.slicewise(lambda x:tf.expand_dims(tf.expand_dims(tf.expand_dims(x, axis=1),axis=1),axis=1),
# [initc],
# output_dtype=tf.float32,
# output_shape=hr_shape,
# name='my_reshape',
# splittable_dims=lr_shape[:-1]+hr_shape[1:4]+part_shape[1:3])
#
state = mtfpm.lpt_init_single(
initc,
a0,
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# Here we can run our nbody
final_state = state #mtfpm.nbody(state, stages, lr_shape, hr_shape, k_dims, kv_lr, kv_hr, halo_size, downsampling_factor=downsampling_factor)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
#final_field = mtf.reshape(final_field, [batch_dim, fx_dim, fy_dim, fz_dim])
# Hack usisng custom reshape because mesh is pretty dumb
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=tf.float32,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
return initc, final_field
def gradient_based_subword_tokenization(x,
length_dim,
max_subword_length=4,
downsample=None,
use_offsets=False,
consider_chars_as_blocks=False,
use_block_pos_embedding=False,
share_block_kernel=False,
memory_embeddings=0,
context=None,
block_mixing_mode=None,
activation="softmax",
downsample_function="mean"):
"""Implements GBSWT from Charformer.
Args:
x: a Tensor containing length_dim
length_dim: a Dimension
max_subword_length: integer
downsample: integer.
use_offsets: boolean.
consider_chars_as_blocks: boolean.
use_block_pos_embedding: boolean.
share_block_kernel: boolean.
memory_embeddings: integer.
context: Context.
block_mixing_mode: Str for block mixing.
activation: Str for block ranking.
downsample_function: Str, supports mean/linformer for now.
Returns:
a Tensor with the same shape as x.
Raises:
ValueError: if channels or depth don't match.
"""
# don't use this for now.
del max_subword_length
del memory_embeddings
all_blocks = []
all_scores = []
tf.logging.info("GSW block layer")
def _tile(x, n, tile_dim):
# Simple tile function in MTF.
return mtf.concat([x] * n, tile_dim.name)
def _repeat(x, n, repeat_dim):
# repeat function in MTF
tmp_dim = mtf.Dimension("tmp", 1)
expand_shape = mtf.Shape(x.shape.dims + [tmp_dim])
x = mtf.reshape(x, expand_shape)
x = _tile(x, n, tmp_dim)
output_shape = []
for dim in x.shape.dims:
if dim.name == "tmp":
continue
if dim.name == repeat_dim.name:
dim = mtf.Dimension(dim.name, dim.size * n)
output_shape.append(dim)
output_shape = mtf.Shape(output_shape)
x = mtf.reshape(x, output_shape)
return x
def _combined_dim(dims):
return mtf.Dimension(dims[0].name, mtf.Shape(dims).size)
# compute all subword blocks
# TODO(yitay): handle offsets to get all blocks
if activation == "sigtanh":
# one score for sigmoid
tmp_dim = mtf.Dimension("block_score", 2)
else:
tmp_dim = mtf.Dimension("block_score", 1)
model_dim = x.shape[-1]
subword_blocks_width = [2, 3, 4]
if consider_chars_as_blocks:
subword_blocks_width += [1]
if share_block_kernel:
block_kernel_shape = mtf.Shape([model_dim, tmp_dim])
block_kernel = mtf.get_variable(x.mesh,
"block_kernel",
block_kernel_shape,
initializer=None,
dtype=context.variable_dtype)
else:
block_kernel = None
for subword_len in subword_blocks_width:
if use_block_pos_embedding:
# this is turn off by default. It is meant to support cases like
# parameterized pooling or other features.
block_len_dim = mtf.Dimension(length_dim.name, subword_len)
# TODO(vqtran): Consider other positional embeddings.
block_pos_emb = sinusoid_positional_embedding_weights(
context.mesh, block_len_dim, x.shape[-1],
context.variable_dtype.activation_dtype)
block_pos_emb = _repeat(
block_pos_emb, math.ceil(length_dim.size / float(subword_len)),
block_len_dim)
if use_offsets:
offset_space = subword_len
else:
offset_space = 1
for offsets in range(offset_space):
if offsets > 0:
xoff = mtf.shift(x, offsets, length_dim, wrap=False)
if use_block_pos_embedding:
block_pos_emb = mtf.shift(block_pos_emb,
offsets,
block_pos_emb.shape[-2],
wrap=False)
else:
xoff = x
tf.logging.info("SW len=%d offset=%d", subword_len, offsets)
if length_dim.size % subword_len != 0:
tf.logging.info("Not divisible by length")
# add extra padding tokens
pad_amt = int(subword_len) - int(length_dim.size % subword_len)
kp = mtf.pad(xoff, [0, pad_amt], length_dim.name)
else:
kp = xoff
if use_block_pos_embedding:
kp += block_pos_emb
bx = mtf.pool_tensor_1d(
kp,
pool_dim=kp.shape.get_dim_by_name("length"),
reduce_fn=mtf.reduce_mean,
pool_size=int(subword_len))
block_score = mtf.layers.dense(bx, [tmp_dim],
use_bias=False,
name="bx",
reduced_dims=[model_dim],
variable_dtype=None,
kernel_weights=block_kernel)
expand_bx = _repeat(bx, subword_len, length_dim)
expand_scores = _repeat(block_score, subword_len, length_dim)
if offsets > 0:
# add offset.
expand_bx = mtf.pad(expand_bx, [offsets, 0], length_dim.name)
expand_scores = mtf.pad(expand_scores, [offsets, 0],
length_dim.name)
new_len = expand_bx.shape.get_dim_by_name(length_dim.name)
if new_len.size < length_dim.size:
pad_amt = new_len.size - length_dim.size
expand_bx = mtf.pad(expand_bx, [0, pad_amt], length_dim.name)
expand_scores = mtf.pad(expand_scores, [0, pad_amt],
length_dim.name)
elif new_len.size > length_dim.size:
expand_bx = mtf.slice(expand_bx, 0, length_dim.size,
length_dim.name)
expand_scores = mtf.slice(expand_scores, 0, length_dim.size,
length_dim.name)
new_tmp_dim = mtf.Dimension("extra_dim", 1)
expand_shape = mtf.Shape(expand_bx.shape.dims + [new_tmp_dim])
expand_scores_shape = mtf.Shape(expand_scores.shape.dims +
[new_tmp_dim])
expand_bx = mtf.reshape(expand_bx, expand_shape)
expand_scores = mtf.reshape(expand_scores, expand_scores_shape)
all_blocks.append(expand_bx)
all_scores.append(expand_scores)
all_blocks = mtf.concat(all_blocks, new_tmp_dim.name)
all_scores = mtf.concat(all_scores, new_tmp_dim.name)
tf.logging.info(all_blocks)
new_tmp_dim = all_blocks.shape.get_dim_by_name("extra_dim")
combined_dim = _combined_dim([new_tmp_dim, tmp_dim])
block_net_shape = all_scores.shape - tmp_dim - new_tmp_dim + combined_dim
block_net = mtf.reshape(all_scores, block_net_shape)
if block_mixing_mode == "score_attention":
tf.logging.info("Using score attention")
att = mtf.einsum([block_net, block_net], reduced_dims=[new_tmp_dim])
tf.logging.info(block_net)
att = mtf.softmax(att, reduced_dim=att.shape[-1])
block_net = mtf.einsum([att, block_net], output_shape=block_net.shape)
tf.logging.info(block_net)
if activation == "softmax":
block_net = mtf.softmax(block_net, reduced_dim=new_tmp_dim)
elif activation == "tanh":
tf.logging.info("Using tanh")
block_net = mtf.tanh(block_net)
all_blocks = block_net * all_blocks
all_blocks = mtf.reduce_sum(all_blocks, reduced_dim=new_tmp_dim)
output = all_blocks
if downsample:
output_length = output.shape.get_dim_by_name("length")
if output_length.size % int(downsample) != 0:
pad_amt = int(downsample) - int(
output_length.size % int(downsample))
output = mtf.pad(output, [0, pad_amt], output_length.name)
if downsample_function == "mean":
output = mtf.pool_tensor_1d(
output,
pool_dim=output.shape.get_dim_by_name("length"),
reduce_fn=mtf.reduce_mean,
pool_size=int(downsample))
else:
raise ValueError("Downsampling function not implemeneted.")
return output
def lpt_prototype(mesh,
initial_conditions,
derivs,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
stages = np.linspace(a0, a, nsteps, endpoint=True)
lap, grad_x, grad_y, grad_z = derivs
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
# Parameters of the large scales decomposition
downsampling_factor = 0
lnc = nc // 2**downsampling_factor
#
ffx_dim = mtf.Dimension("fnx", nc)
ffy_dim = mtf.Dimension("fny", nc)
ffz_dim = mtf.Dimension("fnz", nc)
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tx_dim = mtf.Dimension("tx_lr", nc)
ty_dim = mtf.Dimension("ty_lr", nc)
tz_dim = mtf.Dimension("tz_lr", nc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype('float32'), shape=[pk_dim])
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([nc, nc, nc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32'),
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32'),
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32'),
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
lr_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
field = mtf.import_tf_tensor(mesh, initial_conditions, shape=part_shape)
state = mtfpm.lpt_init_single(
field,
a,
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
print('TOTO', state)
# Here we can run our nbody
final_state = state
# final_state = mtfpm.nbody_single(state, stages, lr_shape, hr_shape,
# kv_lr, halo_size)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
#final_field = mtf.reshape(final_field, [batch_dim, fx_dim, fy_dim, fz_dim])
# Hack usisng custom reshape because mesh is pretty dumb
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=tf.float32,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
final_field = mtf.reshape(final_field,
[batch_dim, ffx_dim, ffy_dim, ffz_dim])
return final_field
def recon_model(mesh,
data,
R0,
x0,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps,
dtype=tf.float32):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
if dtype == tf.float32:
npdtype = "float32"
cdtype = tf.complex64
elif dtype == tf.float64:
npdtype = "float64"
cdtype = tf.complex128
print(dtype, npdtype)
# Compute a few things first, using simple tensorflow
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
if halo_size >= 0.5 * min(nc // n_block_x, nc // n_block_y,
nc // n_block_z):
new_size = int(0.5 *
min(nc // n_block_x, nc // n_block_y, nc // n_block_z))
print('WARNING: REDUCING HALO SIZE from %d to %d' %
(halo_size, new_size))
halo_size = new_size
# Parameters of the large scales decomposition
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
tx_dim = mtf.Dimension("tx_lr", nc)
ty_dim = mtf.Dimension("ty_lr", nc)
tz_dim = mtf.Dimension("tz_lr", nc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
klin = np.loadtxt('../data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype(npdtype), shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
kx = mtf.import_tf_tensor(mesh,
kvec[0].squeeze().astype('float32'),
shape=[tfx_dim])
ky = mtf.import_tf_tensor(mesh,
kvec[1].squeeze().astype('float32'),
shape=[tfy_dim])
kz = mtf.import_tf_tensor(mesh,
kvec[2].squeeze().astype('float32'),
shape=[tfz_dim])
kv = [ky, kz, kx]
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([nc, nc, nc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32'),
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32'),
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32'),
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
# Begin simulation
if x0 is None:
fieldvar = mtf.get_variable(mesh,
'linear',
part_shape,
initializer=tf.random_normal_initializer(
mean=0.0, stddev=1, seed=None))
else:
fieldvar = mtf.get_variable(mesh,
'linear',
part_shape,
initializer=tf.constant_initializer(x0))
print("\nfieldvar : \n", fieldvar)
# Here we can run our nbody
if FLAGS.nbody:
state = mtfpm.lpt_init_single(
fieldvar,
a0,
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# Here we can run our nbody
final_state = mtfpm.nbody_single(state, stages, lr_shape, hr_shape,
kv_lr, halo_size)
else:
final_state = mtfpm.lpt_init_single(
fieldvar,
stages[-1],
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=dtype,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
mtfdata = mtf.import_tf_tensor(mesh,
tf.convert_to_tensor(data),
shape=shape)
# Get prior
k_dims_pr = [d.shape[0] for d in kv]
k_dims_pr = [k_dims_pr[2], k_dims_pr[0], k_dims_pr[1]]
cfield = mesh_utils.r2c3d(fieldvar, k_dims_pr, dtype=cdtype)
def _cwise_prior(kfield, pk, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = tf.sqrt((kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2)
kshape = kk.shape
kk = tf.reshape(kk, [-1])
pkmesh = tfp.math.interp_regular_1d_grid(
x=kk,
x_ref_min=1e-05,
x_ref_max=1000.0,
y_ref=pk,
grid_regularizing_transform=tf.log)
priormesh = tf.reshape(pkmesh, kshape)
return tf.abs(kfield) / priormesh**0.5
cpfield = mtf.cwise(_cwise_prior, [cfield, pk] + kv,
output_dtype=tf.float32)
prior = mtf.reduce_sum(mtf.square(cpfield)) * bs**3 #*nc**3
# Total loss
diff = (final_field - mtfdata)
R0 = tf.constant(R0)
print("R0 in the recon_model : ", R0)
def _cwise_smooth(kfield, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = (kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2
wts = tf.cast(tf.exp(-kk * (R0 * bs / nc)**2), kfield.dtype)
return kfield * wts
# Element-wise function that applies a Fourier kernel
plambda = FLAGS.plambda
def _cwise_logprob(finalfield, data):
galmean = tfp.distributions.Poisson(rate=plambda * (1 + finalfield))
logprob = galmean.log_prob(data)
return -1 * logprob
cfield = mesh_utils.r2c3d(final_field, k_dims_pr, dtype=cdtype)
cfield = mtf.cwise(_cwise_smooth, [cfield] + kv, output_dtype=cdtype)
final_fieldsm = mesh_utils.c2r3d(cfield, diff.shape[-3:], dtype=dtype)
chisq = mtf.cwise(_cwise_logprob, [final_fieldsm, mtfdata],
output_dtype=tf.float32) #
chisq = mtf.reduce_sum(chisq)
## #
loss = chisq + prior
def _cwise_sample(finalfield, data):
galmean = tfp.distributions.Poisson(rate=plambda * (1 + finalfield))
sample = galmean.sample()
return sample
sample = mtf.cwise(_cwise_sample, [final_fieldsm, mtfdata],
output_dtype=tf.float32) #
fields = [fieldvar, sample]
metrics = [chisq, prior, loss]
return fields, metrics, kv
def lpt_prototype(mesh,
initial_conditions,
derivs,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
stages = np.linspace(a0, a, nsteps, endpoint=True)
lap, grad_x, grad_y, grad_z = derivs
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
stages = np.linspace(a0, a, nsteps, endpoint=True)
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
# Parameters of the large scales decomposition
downsampling_factor = FLAGS.dsample
lnc = nc // 2**downsampling_factor
#
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
# Dimensions of the low resolution grid
x_dim = mtf.Dimension("nx_lr", lnc)
y_dim = mtf.Dimension("ny_lr", lnc)
z_dim = mtf.Dimension("nz_lr", lnc)
tx_dim = mtf.Dimension("tx_lr", lnc)
ty_dim = mtf.Dimension("ty_lr", lnc)
tz_dim = mtf.Dimension("tz_lr", lnc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype('float32'), shape=[pk_dim])
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([lnc, lnc, lnc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32') /
2**downsampling_factor,
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32') /
2**downsampling_factor,
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32') /
2**downsampling_factor,
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
# kvec for high resolution blocks
padded_sx_dim = mtf.Dimension('padded_sx_block',
nc // n_block_x + 2 * halo_size)
padded_sy_dim = mtf.Dimension('padded_sy_block',
nc // n_block_y + 2 * halo_size)
padded_sz_dim = mtf.Dimension('padded_sz_block',
nc // n_block_z + 2 * halo_size)
kvec_hr = flowpm.kernels.fftk([
nc // n_block_x + 2 * halo_size, nc // n_block_y + 2 * halo_size,
nc // n_block_z + 2 * halo_size
],
symmetric=False)
kx_hr = mtf.import_tf_tensor(mesh,
kvec_hr[0].squeeze().astype('float32'),
shape=[padded_sx_dim])
ky_hr = mtf.import_tf_tensor(mesh,
kvec_hr[1].squeeze().astype('float32'),
shape=[padded_sy_dim])
kz_hr = mtf.import_tf_tensor(mesh,
kvec_hr[2].squeeze().astype('float32'),
shape=[padded_sz_dim])
kv_hr = [kx_hr, ky_hr, kz_hr]
lr_shape = [batch_dim, x_dim, y_dim, z_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
initc = tf.reshape(
initial_conditions,
[1, n_block_x, nc // n_block_x, n_block_y, nc // n_block_y, 1, nc])
initc = tf.transpose(initc, [0, 1, 3, 5, 2, 4, 6])
field = mtf.import_tf_tensor(mesh, initc, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mpm.halo_reduce(field, blocks_dim, block_size_dim, halo_size)
field = mtf.reshape(field, field.shape + [mtf.Dimension('h_dim', 1)])
high = field
low = mesh_utils.downsample(field, downsampling_factor, antialias=True)
low = mtf.reshape(low, low.shape[:-1])
high = mtf.reshape(high, high.shape[:-1])
for block_size_dim in hr_shape[-3:]:
low = mtf.slice(low, halo_size // 2**downsampling_factor,
block_size_dim.size // 2**downsampling_factor,
block_size_dim.name)
# Hack usisng custom reshape because mesh is pretty dumb
low = mtf.slicewise(lambda x: x[:, 0, 0, 0], [low],
output_dtype=tf.float32,
output_shape=lr_shape,
name='my_dumb_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[:4])
# Hack to handle reshape acrosss multiple dimensions
#low = mtf.reshape(low, [batch_dim, x_dim, low.shape[2], low.shape[5], z_dim])
#low = mtf.reshape(low, lr_shape)
state = mtfpm.lpt_init(
low,
high,
a0,
kv_lr,
kv_hr,
halo_size,
hr_shape,
lr_shape,
k_dims,
part_shape[1:],
downsampling_factor=downsampling_factor,
antialias=True,
)
# Here we can run our nbody
final_state = state #mtfpm.nbody(state, stages, lr_shape, hr_shape, k_dims, kv_lr, kv_hr, halo_size, downsampling_factor=downsampling_factor)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
#final_field = mtf.reshape(final_field, [batch_dim, fx_dim, fy_dim, fz_dim])
# Hack usisng custom reshape because mesh is pretty dumb
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=tf.float32,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
return final_field
def recon_prototype(mesh,
data,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps,
dtype=tf.float32):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
if dtype == tf.float32:
npdtype = "float32"
cdtype = tf.complex64
elif dtype == tf.float64:
npdtype = "float64"
cdtype = tf.complex128
print("Dtype : ", dtype, npdtype)
# Compute a few things first, using simple tensorflow
kny = 1 * np.pi * nc / bs
R1, R2 = 3., 3 * 1.2
stages = np.linspace(a0, a, nsteps, endpoint=True)
#graph = mtf.Graph()
#mesh = mtf.Mesh(graph, "my_mesh")
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
if halo_size >= 0.5 * min(nc // n_block_x, nc // n_block_y,
nc // n_block_z):
new_size = int(0.5 *
min(nc // n_block_x, nc // n_block_y, nc // n_block_z))
print('WARNING: REDUCING HALO SIZE from %d to %d' %
(halo_size, new_size))
halo_size = new_size
# Parameters of the large scales decomposition
scalar = mtf.Dimension("scalar", 1)
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
tx_dim = mtf.Dimension("tx_lr", nc)
ty_dim = mtf.Dimension("ty_lr", nc)
tz_dim = mtf.Dimension("tz_lr", nc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
#k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype(npdtype), shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False)
kx = mtf.import_tf_tensor(mesh,
kvec[0].squeeze().astype('float32'),
shape=[tfx_dim])
ky = mtf.import_tf_tensor(mesh,
kvec[1].squeeze().astype('float32'),
shape=[tfy_dim])
kz = mtf.import_tf_tensor(mesh,
kvec[2].squeeze().astype('float32'),
shape=[tfz_dim])
kv = [ky, kz, kx]
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([nc, nc, nc], symmetric=False)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype('float32'),
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype('float32'),
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype('float32'),
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
#
# Begin simulation
## Compute initial initial conditions distributed
#initc = mtfpm.linear_field(mesh, shape, bs, nc, pk, kv)
fieldvar = mtf.get_variable(mesh, 'linear', part_shape)
input_field = tf.placeholder(data.dtype, [batch_size, nc, nc, nc])
mtfinp = mtf.import_tf_tensor(mesh, input_field, shape=part_shape)
linearop = mtf.assign(fieldvar, mtfinp)
#field = fieldvar
initc = fieldvar
print("initc : ", initc)
# Here we can run our nbody
if FLAGS.nbody:
state = mtfpm.lpt_init_single(
fieldvar,
a0,
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# Here we can run our nbody
final_state = mtfpm.nbody_single(state, stages, lr_shape, hr_shape,
kv_lr, halo_size)
else:
final_state = mtfpm.lpt_init_single(
initc,
stages[-1],
kv_lr,
halo_size,
lr_shape,
hr_shape,
part_shape[1:],
antialias=True,
)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=dtype,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
##
x = final_field
ppars, mpars, kernel = setupfnn()
pwts, pbias, pmx, psx = ppars
mwts, mbias, mmx, msx, mmy, msy = mpars
msy, mmy = msy[0], mmy[0]
print("mmy : ", mmy)
size = 3
k_dims = [d.shape[0] for d in kv]
k_dims = [k_dims[2], k_dims[0], k_dims[1]]
tfnc, tfbs = float_to_mtf(nc * 1., mesh,
scalar), float_to_mtf(bs, mesh, scalar)
x1f = mesh_utils.r2c3d(x, k_dims, dtype=cdtype)
x1f = mtf.cwise(cwise_decic, [x1f] + kv + [tfnc, tfbs],
output_dtype=cdtype)
x1d = mesh_utils.c2r3d(x1f, x.shape[-3:], dtype=dtype)
x1d = mtf.add(x1d, -1.)
x1f0 = mesh_utils.r2c3d(x1d, k_dims, dtype=cdtype)
x1f = mtf.cwise(cwise_fingauss,
[x1f0, float_to_mtf(R1, mesh, scalar)] + kv + [tfnc, tfbs],
output_dtype=cdtype)
x1 = mesh_utils.c2r3d(x1f, x1d.shape[-3:], dtype=dtype)
x2f = mtf.cwise(cwise_fingauss,
[x1f0, float_to_mtf(R2, mesh, scalar)] + kv + [tfnc, tfbs],
output_dtype=cdtype)
x2 = mesh_utils.c2r3d(x2f, x1d.shape[-3:], dtype=dtype)
x12 = x1 - x2
width = tf.placeholder(tf.float32, shape=())
def apply_pwts(x, x1, x2):
#y = tf.expand_dims(x, axis=-1)
y = tf.nn.conv3d(tf.expand_dims(x, axis=-1), kernel, [1, 1, 1, 1, 1],
'SAME')
y1 = tf.nn.conv3d(tf.expand_dims(x1, axis=-1), kernel, [1, 1, 1, 1, 1],
'SAME')
y2 = tf.nn.conv3d(tf.expand_dims(x2, axis=-1), kernel, [1, 1, 1, 1, 1],
'SAME')
#y = tf.nn.conv3d(tf.expand_dims(tfwrap3D(x), -1), kernel, [1, 1, 1, 1, 1], 'VALID')
#y1 = tf.nn.conv3d(tf.expand_dims(tfwrap3D(x1), -1), kernel, [1, 1, 1, 1, 1], 'VALID')
#y2 = tf.nn.conv3d(tf.expand_dims(tfwrap3D(x12), -1), kernel, [1, 1, 1, 1, 1], 'VALID')
yy = tf.concat([y, y1, y2], axis=-1)
yy = yy - pmx
yy = yy / psx
yy1 = tf.nn.relu(tf.matmul(yy, pwts[0]) + pbias[0])
yy2 = tf.nn.relu(tf.matmul(yy1, pwts[1]) + pbias[1])
yy3 = tf.matmul(yy2, pwts[2]) + pbias[2]
pmodel = tf.nn.sigmoid(width * yy3)
return pmodel[..., 0]
pmodel = mtf.slicewise(
apply_pwts,
[x, x1, x12],
output_dtype=tf.float32,
output_shape=part_shape, # + [mtf.Dimension('c_dim', 81)],
name='apply_pwts',
splittable_dims=lr_shape[:-1] + hr_shape[1:4] + part_shape[1:3])
def apply_mwts(x, x1, x2):
#y = tf.expand_dims(x, axis=-1)
zz = tf.concat([
tf.expand_dims(x, -1),
tf.expand_dims(x1, -1),
tf.expand_dims(x2, -1)
],
axis=-1)
zz = zz - mmx
zz = zz / msx
zz1 = tf.nn.elu(tf.matmul(zz, mwts[0]) + mbias[0])
zz2 = tf.nn.elu(tf.matmul(zz1, mwts[1]) + mbias[1])
zz3 = tf.matmul(zz2, mwts[2]) + mbias[2]
mmodel = zz3 * msy + mmy
return mmodel[..., 0]
mmodel = mtf.slicewise(
apply_mwts,
[x, x1, x12],
output_dtype=tf.float32,
output_shape=part_shape, # + [mtf.Dimension('c_dim', 81)],
name='apply_mwts',
splittable_dims=lr_shape[:-1] + hr_shape[1:4] + part_shape[1:3])
model = pmodel * mmodel
mtfdata = mtf.import_tf_tensor(mesh,
tf.convert_to_tensor(data),
shape=shape)
# Get prior
#k_dims = [d.shape[0] for d in kv]
#k_dims = [k_dims[2], k_dims[0], k_dims[1]]
k_dims_pr = [d.shape[0] for d in kv]
k_dims_pr = [k_dims_pr[2], k_dims_pr[0], k_dims_pr[1]]
cfield = mesh_utils.r2c3d(fieldvar, k_dims_pr, dtype=cdtype)
def _cwise_prior(kfield, pk, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = tf.sqrt((kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2)
kshape = kk.shape
kk = tf.reshape(kk, [-1])
pkmesh = tfp.math.interp_regular_1d_grid(
x=kk,
x_ref_min=1e-05,
x_ref_max=1000.0,
y_ref=pk,
grid_regularizing_transform=tf.log)
priormesh = tf.reshape(pkmesh, kshape)
return tf.abs(kfield) / priormesh**0.5
cpfield = mtf.cwise(_cwise_prior, [cfield, pk] + kv,
output_dtype=tf.float32)
prior = mtf.reduce_sum(mtf.square(cpfield)) * bs**3 * nc**3
# Total loss
#diff = (model - mtfdata)
modelf = mesh_utils.r2c3d(model, k_dims, dtype=cdtype)
modelsmf = mtf.cwise(cwise_fingauss,
[modelf, float_to_mtf(R1, mesh, scalar)] + kv +
[tfnc, tfbs],
output_dtype=cdtype)
modelsm = mesh_utils.c2r3d(modelsmf, x1d.shape[-3:], dtype=dtype)
#dataf = mesh_utils.r2c3d(mtfdata, k_dims, dtype=cdtype)
#datasmf = mtf.cwise(cwise_fingauss, [dataf, float_to_mtf(R1, mesh, scalar)] + kv + [tfnc, tfbs], output_dtype=cdtype)
#datasm = mesh_utils.c2r3d(datasmf, x1d.shape[-3:], dtype=dtype)
##Anneal
R0 = tf.placeholder(tf.float32, shape=())
M0 = tf.placeholder(tf.float32, shape=())
off, istd = tf.placeholder(tf.float32, shape=data.shape), tf.placeholder(
tf.float32, shape=data.shape)
mtfoff = mtf.import_tf_tensor(mesh, off, shape=shape)
mtfistd = mtf.import_tf_tensor(mesh, istd, shape=shape)
diff = mtf.log(modelsm + M0) - mtf.log(mtfdata + M0)
#diff = diff / 0.25
#diff = (diff + mtfoff)*mtfistd #For some reason, doing things wrong this one
diff = (diff + mtfoff) / 0.25
def _cwise_smooth(kfield, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = (kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2
wts = tf.cast(tf.exp(-kk * (R0 * bs / nc)**2), kfield.dtype)
return kfield * wts
cdiff = mesh_utils.r2c3d(diff, k_dims_pr, dtype=cdtype)
cdiff = mtf.cwise(_cwise_smooth, [cdiff] + kv, output_dtype=cdtype)
diff = mesh_utils.c2r3d(cdiff, diff.shape[-3:], dtype=dtype)
chisq = mtf.reduce_sum(mtf.square(diff))
loss = chisq + prior
#return initc, final_field, loss, linearop, input_field
nyq = np.pi * nc / bs
def _cwise_highpass(kfield, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = (kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2
wts = tf.cast(tf.exp(-kk * (R0 * bs / nc + 1 / nyq)**2), kfield.dtype)
return kfield * (1 - wts)
var_grads = mtf.gradients([loss], [fieldvar])
cgrads = mesh_utils.r2c3d(var_grads[0], k_dims_pr, dtype=cdtype)
cgrads = mtf.cwise(_cwise_highpass, [cgrads] + kv, output_dtype=cdtype)
var_grads = [mesh_utils.c2r3d(cgrads, diff.shape[-3:], dtype=dtype)]
lr = tf.placeholder(tf.float32, shape=())
update_op = mtf.assign(fieldvar, fieldvar - var_grads[0] * lr)
return initc, model, loss, var_grads, update_op, linearop, input_field, lr, R0, M0, width, chisq, prior, off, istd
def recon_prototype(mesh,
data,
nc=FLAGS.nc,
bs=FLAGS.box_size,
batch_size=FLAGS.batch_size,
a0=FLAGS.a0,
a=FLAGS.af,
nsteps=FLAGS.nsteps,
dtype=tf.float32):
"""
Prototype of function computing LPT deplacement.
Returns output tensorflow and mesh tensorflow tensors
"""
if dtype == tf.float32:
npdtype = "float32"
cdtype = tf.complex64
elif dtype == tf.float64:
npdtype = "float64"
cdtype = tf.complex128
print(dtype, npdtype)
# Compute a few things first, using simple tensorflow
stages = np.linspace(a0, a, nsteps, endpoint=True)
#graph = mtf.Graph()
#mesh = mtf.Mesh(graph, "my_mesh")
# Define the named dimensions
# Parameters of the small scales decomposition
n_block_x = FLAGS.nx
n_block_y = FLAGS.ny
n_block_z = 1
halo_size = FLAGS.hsize
if halo_size >= 0.5 * min(nc // n_block_x, nc // n_block_y,
nc // n_block_z):
new_size = int(0.5 *
min(nc // n_block_x, nc // n_block_y, nc // n_block_z))
print('WARNING: REDUCING HALO SIZE from %d to %d' %
(halo_size, new_size))
halo_size = new_size
# Parameters of the large scales decomposition
downsampling_factor = 2
lnc = nc // 2**downsampling_factor
fx_dim = mtf.Dimension("nx", nc)
fy_dim = mtf.Dimension("ny", nc)
fz_dim = mtf.Dimension("nz", nc)
tfx_dim = mtf.Dimension("tx", nc)
tfy_dim = mtf.Dimension("ty", nc)
tfz_dim = mtf.Dimension("tz", nc)
# Dimensions of the low resolution grid
x_dim = mtf.Dimension("nx_lr", lnc)
y_dim = mtf.Dimension("ny_lr", lnc)
z_dim = mtf.Dimension("nz_lr", lnc)
tx_dim = mtf.Dimension("tx_lr", lnc)
ty_dim = mtf.Dimension("ty_lr", lnc)
tz_dim = mtf.Dimension("tz_lr", lnc)
nx_dim = mtf.Dimension('nx_block', n_block_x)
ny_dim = mtf.Dimension('ny_block', n_block_y)
nz_dim = mtf.Dimension('nz_block', n_block_z)
sx_dim = mtf.Dimension('sx_block', nc // n_block_x)
sy_dim = mtf.Dimension('sy_block', nc // n_block_y)
sz_dim = mtf.Dimension('sz_block', nc // n_block_z)
k_dims = [tx_dim, ty_dim, tz_dim]
batch_dim = mtf.Dimension("batch", batch_size)
klin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[0]
plin = np.loadtxt('../flowpm/data/Planck15_a1p00.txt').T[1]
ipklin = iuspline(klin, plin)
pk_dim = mtf.Dimension("npk", len(plin))
pk = mtf.import_tf_tensor(mesh, plin.astype(npdtype), shape=[pk_dim])
# Compute necessary Fourier kernels
kvec = flowpm.kernels.fftk((nc, nc, nc), symmetric=False, dtype=npdtype)
kx = mtf.import_tf_tensor(mesh,
kvec[0].squeeze().astype(npdtype),
shape=[tfx_dim])
ky = mtf.import_tf_tensor(mesh,
kvec[1].squeeze().astype(npdtype),
shape=[tfy_dim])
kz = mtf.import_tf_tensor(mesh,
kvec[2].squeeze().astype(npdtype),
shape=[tfz_dim])
kv = [ky, kz, kx]
# kvec for low resolution grid
kvec_lr = flowpm.kernels.fftk([lnc, lnc, lnc],
symmetric=False,
dtype=npdtype)
kx_lr = mtf.import_tf_tensor(mesh,
kvec_lr[0].squeeze().astype(npdtype) /
2**downsampling_factor,
shape=[tx_dim])
ky_lr = mtf.import_tf_tensor(mesh,
kvec_lr[1].squeeze().astype(npdtype) /
2**downsampling_factor,
shape=[ty_dim])
kz_lr = mtf.import_tf_tensor(mesh,
kvec_lr[2].squeeze().astype(npdtype) /
2**downsampling_factor,
shape=[tz_dim])
kv_lr = [ky_lr, kz_lr, kx_lr]
# kvec for high resolution blocks
padded_sx_dim = mtf.Dimension('padded_sx_block',
nc // n_block_x + 2 * halo_size)
padded_sy_dim = mtf.Dimension('padded_sy_block',
nc // n_block_y + 2 * halo_size)
padded_sz_dim = mtf.Dimension('padded_sz_block',
nc // n_block_z + 2 * halo_size)
kvec_hr = flowpm.kernels.fftk([
nc // n_block_x + 2 * halo_size, nc // n_block_y + 2 * halo_size,
nc // n_block_z + 2 * halo_size
],
symmetric=False,
dtype=npdtype)
kx_hr = mtf.import_tf_tensor(mesh,
kvec_hr[0].squeeze().astype(npdtype),
shape=[padded_sx_dim])
ky_hr = mtf.import_tf_tensor(mesh,
kvec_hr[1].squeeze().astype(npdtype),
shape=[padded_sy_dim])
kz_hr = mtf.import_tf_tensor(mesh,
kvec_hr[2].squeeze().astype(npdtype),
shape=[padded_sz_dim])
kv_hr = [ky_hr, kz_hr, kx_hr]
# kvec for prior blocks
prior_sx_dim = mtf.Dimension('prior_sx_block', nc // n_block_x)
prior_sy_dim = mtf.Dimension('prior_sy_block', nc // n_block_y)
prior_sz_dim = mtf.Dimension('prior_sz_block', nc // n_block_z)
kvec_pr = flowpm.kernels.fftk(
[nc // n_block_x, nc // n_block_y, nc // n_block_z],
symmetric=False,
dtype=npdtype)
kx_pr = mtf.import_tf_tensor(mesh,
kvec_pr[0].squeeze().astype(npdtype),
shape=[prior_sx_dim])
ky_pr = mtf.import_tf_tensor(mesh,
kvec_pr[1].squeeze().astype(npdtype),
shape=[prior_sy_dim])
kz_pr = mtf.import_tf_tensor(mesh,
kvec_pr[2].squeeze().astype(npdtype),
shape=[prior_sz_dim])
kv_pr = [ky_pr, kz_pr, kx_pr]
shape = [batch_dim, fx_dim, fy_dim, fz_dim]
lr_shape = [batch_dim, x_dim, y_dim, z_dim]
hr_shape = [batch_dim, nx_dim, ny_dim, nz_dim, sx_dim, sy_dim, sz_dim]
part_shape = [batch_dim, fx_dim, fy_dim, fz_dim]
## Compute initial initial conditions distributed
fieldvar = mtf.get_variable(mesh, 'linear', hr_shape)
input_field = tf.placeholder(data.dtype, [
batch_size, n_block_x, n_block_y, n_block_z, nc // n_block_x,
nc // n_block_y, nc // n_block_z
])
mtfinp = mtf.import_tf_tensor(mesh, input_field, shape=hr_shape)
linearop = mtf.assign(fieldvar, mtfinp)
#
field = fieldvar
initc = mtf.slicewise(lambda x: x[:, 0, 0, 0], [field],
output_dtype=tf.float32,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
#
for block_size_dim in hr_shape[-3:]:
field = mtf.pad(field, [halo_size, halo_size], block_size_dim.name)
for blocks_dim, block_size_dim in zip(hr_shape[1:4], field.shape[-3:]):
field = mpm.halo_reduce(field, blocks_dim, block_size_dim, halo_size)
field = mtf.reshape(field, field.shape + [mtf.Dimension('h_dim', 1)])
high = field
low = mesh_utils.downsample(field, downsampling_factor, antialias=True)
low = mtf.reshape(low, low.shape[:-1])
high = mtf.reshape(high, high.shape[:-1])
for block_size_dim in hr_shape[-3:]:
low = mtf.slice(low, halo_size // 2**downsampling_factor,
block_size_dim.size // 2**downsampling_factor,
block_size_dim.name)
# Hack usisng custom reshape because mesh is pretty dumb
low = mtf.slicewise(lambda x: x[:, 0, 0, 0], [low],
output_dtype=initc.dtype,
output_shape=lr_shape,
name='my_dumb_reshape',
splittable_dims=lr_shape[:-1] + hr_shape[:4])
# Here we can run our nbody
if FLAGS.nbody:
state = mtfpm.lpt_init(low,
high,
0.1,
kv_lr,
kv_hr,
halo_size,
hr_shape,
lr_shape,
part_shape[1:],
downsampling_factor=downsampling_factor,
antialias=True)
final_state = mtfpm.nbody(state,
stages,
lr_shape,
hr_shape,
kv_lr,
kv_hr,
halo_size,
downsampling_factor=downsampling_factor)
else:
final_state = mtfpm.lpt_init(low,
high,
stages[-1],
kv_lr,
kv_hr,
halo_size,
hr_shape,
lr_shape,
part_shape[1:],
downsampling_factor=downsampling_factor,
antialias=True)
# paint the field
final_field = mtf.zeros(mesh, shape=hr_shape)
for block_size_dim in hr_shape[-3:]:
final_field = mtf.pad(final_field, [halo_size, halo_size],
block_size_dim.name)
final_field = mesh_utils.cic_paint(final_field, final_state[0], halo_size)
# Halo exchange
for blocks_dim, block_size_dim in zip(hr_shape[1:4],
final_field.shape[-3:]):
final_field = mpm.halo_reduce(final_field, blocks_dim, block_size_dim,
halo_size)
# Remove borders
for block_size_dim in hr_shape[-3:]:
final_field = mtf.slice(final_field, halo_size, block_size_dim.size,
block_size_dim.name)
final_field = mtf.slicewise(
lambda x: x[:, 0, 0, 0], [final_field],
output_dtype=dtype,
output_shape=[batch_dim, fx_dim, fy_dim, fz_dim],
name='my_dumb_reshape',
splittable_dims=part_shape[:-1] + hr_shape[:4])
mtfdata = mtf.import_tf_tensor(mesh,
tf.convert_to_tensor(data),
shape=shape)
# Get prior
k_dims_pr = [d.shape[0] for d in kv_pr]
k_dims_pr = [k_dims_pr[2], k_dims_pr[0], k_dims_pr[1]]
cfield = mesh_utils.r2c3d(fieldvar, k_dims_pr, dtype=cdtype)
def _cwise_prior(kfield, pk, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = tf.sqrt((kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2)
kshape = kk.shape
kk = tf.reshape(kk, [-1])
pkmesh = tfp.math.interp_regular_1d_grid(
x=kk,
x_ref_min=1e-05,
x_ref_max=1000.0,
y_ref=pk,
grid_regularizing_transform=tf.log)
priormesh = tf.reshape(pkmesh, kshape)
return tf.abs(kfield) / priormesh**0.5
cpfield = mtf.cwise(_cwise_prior, [cfield, pk] + kv_pr,
output_dtype=tf.float32)
prior = mtf.reduce_sum(mtf.square(cpfield)) * bs**3
# Total loss
diff = (final_field - mtfdata)
R0 = tf.placeholder(tf.float32, shape=())
def _cwise_smooth(kfield, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = (kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2
wts = tf.cast(tf.exp(-kk * (R0 * bs / nc)**2), kfield.dtype)
return kfield * wts
cdiff = mesh_utils.r2c3d(diff, k_dims_pr, dtype=cdtype)
cdiff = mtf.cwise(_cwise_smooth, [cdiff] + kv_pr, output_dtype=cdtype)
diff = mesh_utils.c2r3d(cdiff, diff.shape[-3:], dtype=dtype)
chisq = mtf.reduce_sum(mtf.square(diff))
loss = chisq + prior
#return initc, final_field, loss, linearop, input_field
nyq = np.pi * nc / bs
def _cwise_highpass(kfield, kx, ky, kz):
kx = tf.reshape(kx, [-1, 1, 1])
ky = tf.reshape(ky, [1, -1, 1])
kz = tf.reshape(kz, [1, 1, -1])
kk = (kx / bs * nc)**2 + (ky / bs * nc)**2 + (kz / bs * nc)**2
wts = tf.cast(tf.exp(-kk * (R0 * bs / nc + 1 / nyq)**2), kfield.dtype)
return kfield * (1 - wts)
var_grads = mtf.gradients([loss], [fieldvar])
cgrads = mesh_utils.r2c3d(var_grads[0], k_dims_pr, dtype=cdtype)
cgrads = mtf.cwise(_cwise_highpass, [cgrads] + kv_pr, output_dtype=cdtype)
var_grads = [
mesh_utils.c2r3d(cgrads, var_grads[0].shape[-3:], dtype=dtype)
]
lr = tf.placeholder(tf.float32, shape=())
update_op = mtf.assign(fieldvar, fieldvar - var_grads[0] * lr)
return initc, final_field, loss, var_grads, update_op, linearop, input_field, lr, R0
