def start_tasks(self, sm_id, ruptures_by_grp, sitecol, assetcol, riskmodel,
imts, trunc_level, correl_model, min_iml, monitor):
"""
:param sm_id: source model ordinal
:param ruptures_by_grp: dictionary of ruptures by src_group_id
:param sitecol: a SiteCollection instance
:param assetcol: an AssetCollection instance
:param riskmodel: a RiskModel instance
:param imts: a list of Intensity Measure Types
:param trunc_level: truncation level
:param correl_model: correlation model
:param min_iml: vector of minimum intensities, one per IMT
:param monitor: a Monitor instance
:returns: an IterResult instance
"""
csm_info = self.csm_info.get_info(sm_id)
grp_ids = sorted(csm_info.get_sm_by_grp())
rlzs_assoc = csm_info.get_rlzs_assoc(
count_ruptures=lambda grp: len(ruptures_by_grp.get(grp.id, [])))
num_events = sum(ebr.multiplicity for grp in ruptures_by_grp
for ebr in ruptures_by_grp[grp])
seeds = self.oqparam.random_seed + numpy.arange(num_events)
allargs = []
# prepare the risk inputs
ruptures_per_block = self.oqparam.ruptures_per_block
start = 0
ignore_covs = self.oqparam.ignore_covs
for grp_id in grp_ids:
rlzs_by_gsim = rlzs_assoc.get_rlzs_by_gsim(grp_id)
samples = rlzs_assoc.samples[grp_id]
for rupts in block_splitter(ruptures_by_grp.get(grp_id, []),
ruptures_per_block):
if ignore_covs or not self.riskmodel.covs:
eps = None
elif self.oqparam.asset_correlation:
eps = EpsilonMatrix1(num_events, self.oqparam.master_seed)
else:
n_events = sum(ebr.multiplicity for ebr in rupts)
eps = EpsilonMatrix0(len(self.assetcol),
seeds[start:start + n_events])
start += n_events
getter = riskinput.GmfGetter(grp_id, rlzs_by_gsim, rupts,
sitecol, imts, min_iml,
trunc_level, correl_model,
samples)
ri = riskinput.RiskInputFromRuptures(getter, eps)
allargs.append((ri, riskmodel, assetcol, monitor))
self.vals = self.assetcol.values()
taskname = '%s#%d' % (event_based_risk.__name__, sm_id + 1)
ires = Starmap(event_based_risk, allargs, name=taskname).submit_all()
ires.num_ruptures = {
sg_id: len(rupts)
for sg_id, rupts in ruptures_by_grp.items()
}
ires.num_events = num_events
ires.num_rlzs = len(rlzs_assoc.realizations)
ires.sm_id = sm_id
return ires
def compute_losses(ssm, src_filter, param, riskmodel, imts, trunc_level,
correl_model, min_iml, monitor):
"""
Compute the losses for a single source model. Returns the ruptures
as an attribute `.ruptures_by_grp` of the list of losses.
:param ssm: CompositeSourceModel containing a single source model
:param sitecol: a SiteCollection instance
:param param: a dictionary of parameters
:param riskmodel: a RiskModel instance
:param imts: a list of Intensity Measure Types
:param trunc_level: truncation level
:param correl_model: correlation model
:param min_iml: vector of minimum intensities, one per IMT
:param monitor: a Monitor instance
:returns: a List containing the losses by taxonomy and some attributes
"""
[grp] = ssm.src_groups
res = List()
gsims = ssm.gsim_lt.values[DEFAULT_TRT]
ruptures_by_grp = compute_ruptures(grp, src_filter, gsims, param, monitor)
[(grp_id, ebruptures)] = ruptures_by_grp.items()
rlzs_assoc = ssm.info.get_rlzs_assoc()
num_rlzs = len(rlzs_assoc.realizations)
rlzs_by_gsim = rlzs_assoc.get_rlzs_by_gsim(grp_id)
getter = riskinput.GmfGetter(grp_id, rlzs_by_gsim, ebruptures,
src_filter.sitecol, imts, min_iml,
trunc_level, correl_model,
rlzs_assoc.samples[grp_id])
ri = riskinput.RiskInputFromRuptures(getter)
res.append(event_based_risk(ri, riskmodel, param, monitor))
res.sm_id = ssm.sm_id
res.num_events = len(ri.hazard_getter.eids)
start = res.sm_id * num_rlzs
res.rlz_slice = slice(start, start + num_rlzs)
res.events_by_grp = ruptures_by_grp.events_by_grp
return res