def _validate_arrays(self, arrays):
"""
Check that arrays are correctly configured
"""
src_vars = mbu.source_nr_vars()
vis_vars = ['ntime', 'nbl', 'na', 'nchan']
for A in arrays:
# Ensure they match ordering constraints
order = [
ORDERING_CONSTRAINTS[var] for var in A['shape']
if var in ORDERING_CONSTRAINTS
]
if not all([b >= a for a, b in zip(order, order[1:])]):
raise ValueError(
('Array %s does not follow '
'ordering constraints. Shape is %s, but '
'this does breaks the expecting ordering of %s ') %
(A['name'], A['shape'], ORDERING_RANK))
# Orthogonality of source variables and
# time, baseline, antenna and channel
nr_src_vars = [v for v in A['shape'] if v in src_vars]
nr_vis_vars = [v for v in A['shape'] if v in vis_vars]
if len(nr_src_vars) > 0 and len(nr_vis_vars) > 0:
raise ValueError(
('Array %s of shape %s '
'has source variables %s mixed with '
'%s. This solver does not currently '
'support this mix') %
(A['name'], A['shape'], nr_src_vars, nr_vis_vars))
def _validate_arrays(self, arrays):
"""
Check that arrays are correctly configured
"""
src_vars = mbu.source_nr_vars()
vis_vars = ['ntime', 'nbl', 'na', 'nchan']
for A in arrays:
# Ensure they match ordering constraints
order = [ORDERING_CONSTRAINTS[var]
for var in A['shape'] if var in ORDERING_CONSTRAINTS]
if not all([b >= a for a, b in zip(order, order[1:])]):
raise ValueError(('Array %s does not follow '
'ordering constraints. Shape is %s, but '
'this does breaks the expecting ordering of %s ') % (
A['name'], A['shape'],
ORDERING_RANK))
# Orthogonality of source variables and
# time, baseline, antenna and channel
nr_src_vars = [v for v in A['shape'] if v in src_vars]
nr_vis_vars = [v for v in A['shape'] if v in vis_vars]
if len(nr_src_vars) > 0 and len(nr_vis_vars) > 0:
raise ValueError(('Array %s of shape %s '
'has source variables %s mixed with '
'%s. This solver does not currently '
'support this mix') % (
A['name'], A['shape'],
nr_src_vars, nr_vis_vars))
def _thread_create_solvers(self, subslvr_cfg, P, nsolvers):
"""
Create solvers on the thread local data
"""
montblanc.log.debug('Creating solvers in thread %s',
threading.current_thread())
# GPU Device memory pool, used in cases where PyCUDA
# needs GPU memory that we haven't been able to pre-allocate
dev_mem_pool = pycuda.tools.DeviceMemoryPool()
# CPU Pinned memory pool, used for array transfers
pinned_mem_pool = pycuda.tools.PageLockedMemoryPool()
# Mutex for guarding the memory pools
pool_lock = threading.Lock()
# Dirty index, indicating the CPU index of the
# data currently on the GPU, used for avoiding
# array transfer
self.thread_local.dirty = [{} for n in range(nsolvers)]
# Configure thread local storage
# Number of solvers in this thread
self.thread_local.nsolvers = nsolvers
# List of solvers used by this thread, set below
self.thread_local.solvers = [None for s in range(nsolvers)]
# Initialise the subsolver generator
self.thread_local.subslvr_gen = self._thread_gen_sub_solvers()
# Set the CUDA context in the configuration to
# the one associated with this thread
subslvr_cfg[Options.CONTEXT] = self.thread_local.context
# Create solvers for this context
for i in range(nsolvers):
subslvr = RimeSolver(subslvr_cfg)
# Configure the source dimensions of each sub-solver.
# Change the local size of each source dim so that there is
# enough space in the associated arrays for NSRC sources.
# Initially, configure the extents to be [0, NSRC], although
# this will be setup properly in _thread_solve_sub
nsrc = P[Options.NSRC]
U = [{
'name': nr_var,
'local_size': nsrc if nsrc < P[nr_var] else P[nr_var],
'lower_extent': 0,
'upper_extent': nsrc if nsrc < P[nr_var] else P[nr_var],
} for nr_var in [Options.NSRC] + mbu.source_nr_vars()]
subslvr.update_dimensions(U)
# Give sub solvers access to device and pinned memory pools
subslvr.dev_mem_pool = dev_mem_pool
subslvr.pinned_mem_pool = pinned_mem_pool
subslvr.pool_lock = pool_lock
self.thread_local.solvers[i] = subslvr
def _thread_create_solvers(self, subslvr_cfg, P, nsolvers):
"""
Create solvers on the thread local data
"""
montblanc.log.debug('Creating solvers in thread %s',
threading.current_thread())
# GPU Device memory pool, used in cases where PyCUDA
# needs GPU memory that we haven't been able to pre-allocate
dev_mem_pool = pycuda.tools.DeviceMemoryPool()
# CPU Pinned memory pool, used for array transfers
pinned_mem_pool = pycuda.tools.PageLockedMemoryPool()
# Mutex for guarding the memory pools
pool_lock = threading.Lock()
# Dirty index, indicating the CPU index of the
# data currently on the GPU, used for avoiding
# array transfer
self.thread_local.dirty = [{} for n in range(nsolvers)]
# Configure thread local storage
# Number of solvers in this thread
self.thread_local.nsolvers = nsolvers
# List of solvers used by this thread, set below
self.thread_local.solvers = [None for s in range(nsolvers)]
# Initialise the subsolver generator
self.thread_local.subslvr_gen = self._thread_gen_sub_solvers()
# Set the CUDA context in the configuration to
# the one associated with this thread
subslvr_cfg[Options.CONTEXT] = self.thread_local.context
# Create solvers for this context
for i in range(nsolvers):
subslvr = RimeSolver(subslvr_cfg)
# Configure the source dimensions of each sub-solver.
# Change the local size of each source dim so that there is
# enough space in the associated arrays for NSRC sources.
# Initially, configure the extents to be [0, NSRC], although
# this will be setup properly in _thread_solve_sub
nsrc = P[Options.NSRC]
U = [{
'name': nr_var,
'local_size': nsrc if nsrc < P[nr_var] else P[nr_var],
'lower_extent': 0,
'upper_extent': nsrc if nsrc < P[nr_var] else P[nr_var],
} for nr_var in [Options.NSRC] + mbu.source_nr_vars()]
subslvr.update_dimensions(U)
# Give sub solvers access to device and pinned memory pools
subslvr.dev_mem_pool = dev_mem_pool
subslvr.pinned_mem_pool = pinned_mem_pool
subslvr.pool_lock = pool_lock
self.thread_local.solvers[i] = subslvr
def _gen_source_slices(self):
"""
Iterate over the visibility space in chunks, returning a
dictionary of slices keyed on the following dimensions:
nsrc, npsrc, ngsrc, nssrc, ...
"""
# Get a list of source number variables/dimensions
src_nr_vars = mbu.source_nr_vars()
lower_extents = self.dim_lower_extent(*src_nr_vars)
upper_extents = self.dim_upper_extent(*src_nr_vars)
non_zero = [(n, l) for n, l in zip(src_nr_vars, lower_extents)
if l != 0]
if len(non_zero) > 0:
raise ValueError(
"The following source dimensions "
"have non-zero lower extents [{nzd}]".format(nzd=non_zero))
# Create source counts, or dimension extent sizes
# for each source type/dimension
src_nr_var_counts = {
nr_var: u - l
for nr_var, l, u in zip(src_nr_vars, lower_extents, upper_extents)
}
# Work out which range of sources in the total space
# we are iterating over
nsrc_lower, nsrc_upper = self.dim_extents(Options.NSRC)
# Create the slice dictionaries, which we use to index
# dimensions of the CPU and GPU array.
cpu_slice, gpu_slice = {}, {}
# Set up source slicing
for src in xrange(nsrc_lower, nsrc_upper, self.src_diff):
src_end = min(src + self.src_diff, nsrc_upper)
src_diff = src_end - src
cpu_slice[Options.NSRC] = slice(src, src_end, 1)
gpu_slice[Options.NSRC] = slice(0, src_diff, 1)
# Get the source slice ranges for each individual
# source type, and update the CPU dictionary with them
src_range_slices = mbu.source_range_slices(src, src_end,
src_nr_var_counts)
cpu_slice.update(src_range_slices)
# and configure the same for GPU slices
for s in src_nr_vars:
cpu_var = cpu_slice[s]
gpu_slice[s] = slice(0, cpu_var.stop - cpu_var.start, 1)
yield (cpu_slice.copy(), gpu_slice.copy())
def _gen_source_slices(self):
"""
Iterate over the visibility space in chunks, returning a
dictionary of slices keyed on the following dimensions:
nsrc, npsrc, ngsrc, nssrc, ...
"""
# Get a list of source number variables/dimensions
src_nr_vars = mbu.source_nr_vars()
lower_extents = self.dim_lower_extent(*src_nr_vars)
upper_extents = self.dim_upper_extent(*src_nr_vars)
non_zero = [(n, l) for n, l
in zip(src_nr_vars, lower_extents) if l != 0]
if len(non_zero) > 0:
raise ValueError("The following source dimensions "
"have non-zero lower extents [{nzd}]".format(
nzd=non_zero))
# Create source counts, or dimension extent sizes
# for each source type/dimension
src_nr_var_counts = { nr_var: u-l
for nr_var, l, u in zip(src_nr_vars,
lower_extents, upper_extents) }
# Work out which range of sources in the total space
# we are iterating over
nsrc_lower, nsrc_upper = self.dim_extents(Options.NSRC)
# Create the slice dictionaries, which we use to index
# dimensions of the CPU and GPU array.
cpu_slice, gpu_slice = {}, {}
# Set up source slicing
for src in xrange(nsrc_lower, nsrc_upper, self.src_diff):
src_end = min(src + self.src_diff, nsrc_upper)
src_diff = src_end - src
cpu_slice[Options.NSRC] = slice(src, src_end, 1)
gpu_slice[Options.NSRC] = slice(0, src_diff, 1)
# Get the source slice ranges for each individual
# source type, and update the CPU dictionary with them
src_range_slices = mbu.source_range_slices(
src, src_end, src_nr_var_counts)
cpu_slice.update(src_range_slices)
# and configure the same for GPU slices
for s in src_nr_vars:
cpu_var = cpu_slice[s]
gpu_slice[s] = slice(0, cpu_var.stop - cpu_var.start, 1)
yield (cpu_slice.copy(), gpu_slice.copy())
def _construct_tensorflow_feed_data(dfs, cube, iter_dims,
nr_of_input_staging_areas):
FD = AttrDict()
# https://github.com/bcj/AttrDict/issues/34
FD._setattr('_sequence_type', list)
# Reference local staging_areas
FD.local = local = AttrDict()
# https://github.com/bcj/AttrDict/issues/34
local._setattr('_sequence_type', list)
# Create placholder variables for source counts
FD.src_ph_vars = AttrDict({
n: tf.placeholder(dtype=tf.int32, shape=(), name=n)
for n in ['nsrc'] + mbu.source_nr_vars()})
# Create placeholder variables for properties
FD.property_ph_vars = AttrDict({
n: tf.placeholder(dtype=p.dtype, shape=(), name=n)
for n, p in cube.properties().iteritems() })
#========================================================
# Determine which arrays need feeding once/multiple times
#========================================================
# Take all arrays flagged as input
input_arrays = [a for a in cube.arrays().itervalues()
if 'input' in a.tags]
src_data_sources, feed_many, feed_once = _partition(iter_dims,
input_arrays)
#=====================================
# Descriptor staging area
#=====================================
local.descriptor = create_staging_area_wrapper('descriptors',
['descriptor'], dfs)
#===========================================
# Staging area for multiply fed data sources
#===========================================
# Create the staging_area for holding the feed many input
local.feed_many = [create_staging_area_wrapper('feed_many_%d' % i,
['descriptor'] + [a.name for a in feed_many], dfs)
for i in range(nr_of_input_staging_areas)]
#=================================================
# Staging areas for each radio source data sources
#=================================================
# Create the source array staging areas
local.sources = { src_nr_var: [
create_staging_area_wrapper('%s_%d' % (src_type, i),
[a.name for a in src_data_sources[src_nr_var]], dfs)
for i in range(nr_of_input_staging_areas)]
for src_type, src_nr_var in source_var_types().iteritems()
}
#======================================
# The single output staging_area
#======================================
local.output = create_staging_area_wrapper('output',
['descriptor', 'model_vis', 'chi_squared'], dfs)
#=================================================
# Create tensorflow variables which are
# fed only once via an assign operation
#=================================================
def _make_feed_once_tuple(array):
dtype = dfs[array.name].dtype
ph = tf.placeholder(dtype=dtype,
name=a.name + "_placeholder")
var = tf.Variable(tf.zeros(shape=(1,), dtype=dtype),
validate_shape=False,
name=array.name)
op = tf.assign(var, ph, validate_shape=False)
#op = tf.Print(op, [tf.shape(var), tf.shape(op)],
# message="Assigning {}".format(array.name))
return FeedOnce(ph, var, op)
# Create placeholders, variables and assign operators
# for data sources that we will only feed once
local.feed_once = { a.name : _make_feed_once_tuple(a)
for a in feed_once }
#=======================================================
# Construct the list of data sources that need feeding
#=======================================================
# Data sources from input staging_areas
src_sa = [q for sq in local.sources.values() for q in sq]
all_staging_areas = local.feed_many + src_sa
input_sources = { a for q in all_staging_areas
for a in q.fed_arrays}
# Data sources from feed once variables
input_sources.update(local.feed_once.keys())
local.input_sources = input_sources
return FD
def _apply_source_provider_dim_updates(cube, source_providers, budget_dims):
"""
Given a list of source_providers, apply the list of
suggested dimension updates given in provider.updated_dimensions()
to the supplied hypercube.
Dimension global_sizes are always updated with the supplied sizes and
lower_extent is always set to 0. upper_extent is set to any reductions
(current upper_extents) existing in budget_dims, otherwise it is set
to global_size.
"""
# Create a mapping between a dimension and a
# list of (global_size, provider_name) tuples
update_map = collections.defaultdict(list)
for prov in source_providers:
for dim_tuple in prov.updated_dimensions():
name, size = dim_tuple
# Don't accept any updates on the nsrc dimension
# This is managed internally
if name == 'nsrc':
continue
dim_update = DimensionUpdate(size, prov.name())
update_map[name].append(dim_update)
# No dimensions were updated, quit early
if len(update_map) == 0:
return cube.bytes_required()
# Ensure that the global sizes we receive
# for each dimension are unique. Tell the user
# when conflicts occur
update_list = []
for name, updates in update_map.iteritems():
if not all(updates[0].size == du.size for du in updates[1:]):
raise ValueError("Received conflicting "
"global size updates '{u}'"
" for dimension '{n}'.".format(n=name, u=updates))
update_list.append((name, updates[0].size))
montblanc.log.info("Updating dimensions {} from "
"source providers.".format(str(update_list)))
# Now update our dimensions
for name, global_size in update_list:
# Defer to existing any existing budgeted extent sizes
# Otherwise take the global_size
extent_size = budget_dims.get(name, global_size)
# Take the global_size if extent_size was previously zero!
extent_size = global_size if extent_size == 0 else extent_size
# Clamp extent size to global size
if extent_size > global_size:
extent_size = global_size
# Update the dimension
cube.update_dimension(name,
global_size=global_size,
lower_extent=0,
upper_extent=extent_size)
# Handle global number of sources differently
# It's equal to the number of
# point's, gaussian's, sersic's combined
nsrc = sum(cube.dim_global_size(*mbu.source_nr_vars()))
# Extent size will be equal to whatever source type
# we're currently iterating over. So just take
# the maximum extent size given the sources
es = max(cube.dim_extent_size(*mbu.source_nr_vars()))
cube.update_dimension('nsrc',
global_size=nsrc,
lower_extent=0,
upper_extent=es)
# Return our cube size
return cube.bytes_required()
def _budget(cube, slvr_cfg):
# Figure out a viable dimension configuration
# given the total problem size
mem_budget = slvr_cfg.get('mem_budget', 2*ONE_GB)
bytes_required = cube.bytes_required()
src_dims = mbu.source_nr_vars() + ['nsrc']
dim_names = ['na', 'nbl', 'ntime'] + src_dims
global_sizes = cube.dim_global_size(*dim_names)
na, nbl, ntime = global_sizes[:3]
# Keep track of original dimension sizes and any reductions that are applied
original_sizes = { r: s for r, s in zip(dim_names, global_sizes) }
applied_reductions = {}
def _reduction():
# Reduce over time first
trange = _uniq_log2_range(1, ntime, 5)
for t in trange[0:1]:
yield [('ntime', t)]
# Attempt reduction over source
sbs = slvr_cfg['source_batch_size']
srange = _uniq_log2_range(10, sbs, 5) if sbs > 10 else 10
src_dim_gs = global_sizes[3:]
for bs in srange:
yield [(d, bs if bs < gs else gs) for d, gs
in zip(src_dims, src_dim_gs)]
# Try the rest of the timesteps
for t in trange[1:]:
yield [('ntime', t)]
# Reduce by baseline
for bl in _uniq_log2_range(na, nbl, 5):
yield [('nbl', bl)]
for reduction in _reduction():
if bytes_required > mem_budget:
for dim, size in reduction:
applied_reductions[dim] = size
cube.update_dimension(dim, lower_extent=0, upper_extent=size)
else:
break
bytes_required = cube.bytes_required()
# Log some information about the memory_budget
# and dimension reduction
montblanc.log.info(("Selected a solver memory budget of {rb} "
"given a hard limit of {mb}.").format(
rb=mbu.fmt_bytes(bytes_required),
mb=mbu.fmt_bytes(mem_budget)))
if len(applied_reductions) > 0:
montblanc.log.info("The following dimension reductions "
"were applied:")
for k, v in applied_reductions.iteritems():
montblanc.log.info('{p}{d}: {id} => {rd}'.format
(p=' '*4, d=k, id=original_sizes[k], rd=v))
else:
montblanc.log.info("No dimension reductions were applied.")
return applied_reductions, bytes_required
def _thread_budget(self, slvr_cfg, A_sub, props):
"""
Get memory budget and dimension reduction
information from the CUDA device associated
with the current thread and context
"""
montblanc.log.debug('Budgeting in thread %s',
threading.current_thread())
# Query free memory on this context
(free_mem, total_mem) = cuda.mem_get_info()
device = self.thread_local.context.get_device()
montblanc.log.info('{d}: {t} total {f} free.'.format(
d=device.name(),
f=mbu.fmt_bytes(free_mem),
t=mbu.fmt_bytes(total_mem)))
# Work with a supplied memory budget, otherwise use
# free memory less an amount equal to the upper size
# of an NVIDIA context
mem_budget = slvr_cfg.get('mem_budget', free_mem - 200 * ONE_MB)
nsolvers = slvr_cfg.get(Options.NSOLVERS)
na = slvr_cfg.get(Options.NA)
nsrc = slvr_cfg.get(Options.SOURCE_BATCH_SIZE)
src_str_list = [Options.NSRC] + mbu.source_nr_vars()
src_reduction_str = '&'.join(
['%s=%s' % (nr_var, nsrc) for nr_var in src_str_list])
ntime_split = np.int32(np.ceil(100.0 / nsolvers))
ntime_split_str = 'ntime={n}'.format(n=ntime_split)
# Figure out a viable dimension configuration
# given the total problem size
viable, modded_dims = mbu.viable_dim_config(mem_budget, A_sub, props, [
ntime_split_str, src_reduction_str, 'ntime',
'nbl={na}&na={na}'.format(na=na), 'nchan=50%'
], nsolvers)
# Create property dictionary with updated
# dimensions.
P = props.copy()
P.update(modded_dims)
required_mem = mbu.dict_array_bytes_required(A_sub, P)
if not viable:
dim_set_str = ', '.join(
['%s=%s' % (k, v) for k, v in modded_dims.iteritems()])
ary_list_str = '\n'.join([
'%-*s %-*s %s' %
(15, a['name'], 10, mbu.fmt_bytes(mbu.dict_array_bytes(
a, P)), mbu.shape_from_str_tuple(a['shape'], P))
for a in sorted(A_sub,
reverse=True,
key=lambda a: mbu.dict_array_bytes(a, P))
])
raise MemoryError(
"Tried reducing the problem size "
"by setting '%s' on all arrays, "
"but the resultant required memory of %s "
"for each of %d solvers is too big "
"to fit within the memory budget of %s. "
"List of biggests offenders:\n%s "
"\nSplitting the problem along the "
"channel dimension needs to be "
"implemented." %
(dim_set_str, mbu.fmt_bytes(required_mem), nsolvers,
mbu.fmt_bytes(mem_budget), ary_list_str))
return P, modded_dims, required_mem
import montblanc.impl.rime.v4.RimeSolver as BSV4mod
from montblanc.impl.rime.v5.RimeSolver import RimeSolver
ONE_KB = 1024
ONE_MB = ONE_KB**2
ONE_GB = ONE_KB**3
ASYNC_HTOD = 'htod'
ASYNC_DTOH = 'dtoh'
ALL_SLICE = slice(None, None, 1)
EMPTY_SLICE = slice(0, 0, 1)
ORDERING_CONSTRAINTS = {nr_var: 1 for nr_var in mbu.source_nr_vars()}
ORDERING_CONSTRAINTS.update({
'nsrc': 1,
'ntime': 2,
'nbl': 3,
'na': 3,
'nchan': 4
})
ORDERING_RANK = [
' or '.join(['nsrc'] + mbu.source_nr_vars()), 'ntime',
' or '.join(['nbl', 'na']), 'nchan'
]
def _update_refs(pool, new_refs):
def _thread_budget(self, slvr_cfg, A_sub, props):
"""
Get memory budget and dimension reduction
information from the CUDA device associated
with the current thread and context
"""
montblanc.log.debug('Budgeting in thread %s', threading.current_thread())
# Query free memory on this context
(free_mem,total_mem) = cuda.mem_get_info()
device = self.thread_local.context.get_device()
montblanc.log.info('{d}: {t} total {f} free.'.format(
d=device.name(), f=mbu.fmt_bytes(free_mem), t=mbu.fmt_bytes(total_mem)))
# Work with a supplied memory budget, otherwise use
# free memory less an amount equal to the upper size
# of an NVIDIA context
mem_budget = slvr_cfg.get('mem_budget', free_mem - 200*ONE_MB)
nsolvers = slvr_cfg.get(Options.NSOLVERS)
na = slvr_cfg.get(Options.NA)
nsrc = slvr_cfg.get(Options.SOURCE_BATCH_SIZE)
src_str_list = [Options.NSRC] + mbu.source_nr_vars()
src_reduction_str = '&'.join(['%s=%s' % (nr_var, nsrc)
for nr_var in src_str_list])
ntime_split = np.int32(np.ceil(100.0 / nsolvers))
ntime_split_str = 'ntime={n}'.format(n=ntime_split)
# Figure out a viable dimension configuration
# given the total problem size
viable, modded_dims = mbu.viable_dim_config(
mem_budget, A_sub, props,
[ntime_split_str, src_reduction_str, 'ntime',
'nbl={na}&na={na}'.format(na=na),
'nchan=50%'],
nsolvers)
# Create property dictionary with updated
# dimensions.
P = props.copy()
P.update(modded_dims)
required_mem = mbu.dict_array_bytes_required(A_sub, P)
if not viable:
dim_set_str = ', '.join(['%s=%s' % (k,v)
for k,v in modded_dims.iteritems()])
ary_list_str = '\n'.join(['%-*s %-*s %s' % (
15, a['name'],
10, mbu.fmt_bytes(mbu.dict_array_bytes(a, P)),
mbu.shape_from_str_tuple(a['shape'],P))
for a in sorted(A_sub,
reverse=True,
key=lambda a: mbu.dict_array_bytes(a, P))])
raise MemoryError("Tried reducing the problem size "
"by setting '%s' on all arrays, "
"but the resultant required memory of %s "
"for each of %d solvers is too big "
"to fit within the memory budget of %s. "
"List of biggests offenders:\n%s "
"\nSplitting the problem along the "
"channel dimension needs to be "
"implemented." %
(dim_set_str,
mbu.fmt_bytes(required_mem),
nsolvers,
mbu.fmt_bytes(mem_budget),
ary_list_str))
return P, modded_dims, required_mem
import montblanc.impl.rime.v4.RimeSolver as BSV4mod
from montblanc.impl.rime.v5.RimeSolver import RimeSolver
ONE_KB = 1024
ONE_MB = ONE_KB**2
ONE_GB = ONE_KB**3
ASYNC_HTOD = 'htod'
ASYNC_DTOH = 'dtoh'
ALL_SLICE = slice(None,None,1)
EMPTY_SLICE = slice(0,0,1)
ORDERING_CONSTRAINTS = { nr_var : 1 for nr_var in mbu.source_nr_vars() }
ORDERING_CONSTRAINTS.update({ 'nsrc' : 1,
'ntime': 2, 'nbl': 3, 'na': 3, 'nchan': 4 })
ORDERING_RANK = [' or '.join(['nsrc'] + mbu.source_nr_vars()),
'ntime', ' or '.join(['nbl', 'na']), 'nchan']
def _update_refs(pool, new_refs):
for key, value in new_refs.iteritems():
pool[key].extend(value)
class CompositeRimeSolver(MontblancNumpySolver):
"""
Composite solver implementation for RIME.
Implements a solver composed of multiple RimeSolvers. The sub-solver