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update cic read halo size and notebooks examples

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This commit is contained in:
Wassim Kabalan 2025-06-07 19:26:37 +02:00
parent d4049e5db4
commit e7112e0c25
5 changed files with 161 additions and 176 deletions
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6
jaxpm/distributed.py
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@ -166,7 +166,7 @@ def uniform_particles(mesh_shape, sharding=None):
axis=-1)
def normal_field(mesh_shape, seed, sharding=None):
def normal_field(mesh_shape, seed, sharding=None , dtype='float32'):
"""Generate a Gaussian random field with the given power spectrum."""
gpu_mesh = sharding.mesh if sharding is not None else None
if gpu_mesh is not None and not (gpu_mesh.empty):
@ -190,9 +190,9 @@ def normal_field(mesh_shape, seed, sharding=None):
return jax.random.normal(key=keys[idx], shape=shape, dtype=dtype)
return shard_map(
partial(normal, shape=local_mesh_shape, dtype='float32'),
partial(normal, shape=local_mesh_shape, dtype=dtype),
mesh=gpu_mesh,
in_specs=P(None),
out_specs=spec)(keys) # yapf: disable
else:
return jax.random.normal(shape=mesh_shape, key=seed)
return jax.random.normal(shape=mesh_shape, key=seed, dtype=dtype)

5
jaxpm/painting.py
View file

@ -167,7 +167,7 @@ def _cic_paint_dx_impl(displacements,
halo_y, _ = halo_size[1]
original_shape = displacements.shape
particle_mesh = jnp.zeros(original_shape[:-1], dtype='float32')
particle_mesh = jnp.zeros(original_shape[:-1], dtype=displacements.dtype)
if not jnp.isscalar(weight):
if weight.shape != original_shape[:-1]:
raise ValueError("Weight shape must match particle shape")
@ -185,7 +185,7 @@ def _cic_paint_dx_impl(displacements,
return scatter(pmid.reshape([-1, 3]),
displacements.reshape([-1, 3]),
particle_mesh,
chunk_size=2**24,
chunk_size=chunk_size,
val=weight)
@ -240,6 +240,7 @@ def _cic_read_dx_impl(grid_mesh, disp, halo_size):
def cic_read_dx(grid_mesh, disp, halo_size=0, sharding=None):
halo_size, halo_extents = get_halo_size(halo_size, sharding=sharding)
halo_size = jax.tree.map(lambda x: x//2, halo_size)
grid_mesh = slice_pad(grid_mesh, halo_size, sharding=sharding)
grid_mesh = halo_exchange(grid_mesh,
halo_extents=halo_extents,