Source code for openquake.calculators.classical

# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright (C) 2014-2019 GEM Foundation
#
# OpenQuake is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
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# GNU Affero General Public License for more details.
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import os
import time
import logging
import operator
import numpy

from openquake.baselib import parallel, hdf5
from openquake.baselib.general import AccumDict, block_splitter
from openquake.hazardlib.contexts import ContextMaker
from openquake.hazardlib.calc.filters import split_sources
from openquake.hazardlib.calc.hazard_curve import classical
from openquake.hazardlib.probability_map import (
    ProbabilityMap, ProbabilityCurve)
from openquake.commonlib import calc, util
from openquake.commonlib.source_model_factory import random_filtered_sources
from openquake.calculators import getters
from openquake.calculators import base

U16 = numpy.uint16
U32 = numpy.uint32
F32 = numpy.float32
F64 = numpy.float64
weight = operator.attrgetter('weight')
grp_extreme_dt = numpy.dtype([('grp_id', U16), ('grp_name', hdf5.vstr),
                             ('extreme_poe', F32)])


[docs]def get_src_ids(sources): """ :returns: a string with the source IDs of the given sources, stripping the extension after the colon, if any """ src_ids = [] for src in sources: long_src_id = src.source_id try: src_id, ext = long_src_id.rsplit(':', 1) except ValueError: src_id = long_src_id src_ids.append(src_id) return ' '.join(set(src_ids))
[docs]def get_extreme_poe(array, imtls): """ :param array: array of shape (L, G) with L=num_levels, G=num_gsims :param imtls: DictArray imt -> levels :returns: the maximum PoE corresponding to the maximum level for IMTs and GSIMs """ return max(array[imtls(imt).stop - 1].max() for imt in imtls)
[docs]def classical_split_filter(srcs, srcfilter, gsims, params, monitor): """ Split the given sources, filter the subsources and the compute the PoEs. Yield back subtasks if the split sources contain more than maxweight ruptures. """ # first check if we are sampling the sources ss = int(os.environ.get('OQ_SAMPLE_SOURCES', 0)) if ss: splits, stime = split_sources(srcs) srcs = random_filtered_sources(splits, srcfilter, ss) yield classical(srcs, srcfilter, gsims, params, monitor) return # NB: splitting all the sources improves the distribution significantly, # compared to splitting only the big source sources = [] with monitor("filtering/splitting sources"): for src, _sites in srcfilter(srcs): splits, _stime = split_sources([src]) sources.extend(srcfilter.filter(splits)) if sources: yield from parallel.split_task( classical, sources, srcfilter, gsims, params, monitor, duration=params['task_duration'])
[docs]def preclassical(srcs, srcfilter, gsims, params, monitor): """ Prefilter the sources """ calc_times = AccumDict(accum=numpy.zeros(3, F32)) # nrups, nsites, time pmap = AccumDict(accum=0) for src in srcs: t0 = time.time() if srcfilter.get_close_sites(src) is None: continue dt = time.time() - t0 calc_times[src.id] += F32([src.num_ruptures, src.nsites, dt]) for grp_id in src.src_group_ids: pmap[grp_id] += 0 return dict(pmap=pmap, calc_times=calc_times, rup_data={'grp_id': []}, task_no=monitor.task_no)
[docs]@base.calculators.add('classical') class ClassicalCalculator(base.HazardCalculator): """ Classical PSHA calculator """ core_task = classical_split_filter accept_precalc = ['classical']
[docs] def agg_dicts(self, acc, dic): """ Aggregate dictionaries of hazard curves by updating the accumulator. :param acc: accumulator dictionary :param dic: dict with keys pmap, calc_times, rup_data """ with self.monitor('aggregate curves', autoflush=True): d = dic['calc_times'] # srcid -> eff_rups, eff_sites, dt self.calc_times += d srcids = [] eff_rups = 0 eff_sites = 0 for srcid, rec in d.items(): srcids.append(srcid) eff_rups += rec[0] if rec[0]: eff_sites += rec[1] / rec[0] self.sources_by_task[dic['task_no']] = ( eff_rups, eff_sites, U32(srcids)) for grp_id, pmap in dic['pmap'].items(): if pmap: acc[grp_id] |= pmap acc.eff_ruptures[grp_id] += eff_rups rup_data = dic['rup_data'] if len(rup_data['grp_id']): nr = len(rup_data['srcidx']) default = (numpy.ones(nr, F32) * numpy.nan, [numpy.zeros(0, F32)] * nr) for k in self.rparams: # variable lenght arrays vlen = k.endswith('_') or k == 'probs_occur' try: v = rup_data[k] except KeyError: v = default[vlen] if vlen: self.datastore.hdf5.save_vlen('rup/' + k, v) else: self.datastore.extend('rup/' + k, v) return acc
[docs] def acc0(self): """ Initial accumulator, a dict grp_id -> ProbabilityMap(L, G) """ csm_info = self.csm.info zd = AccumDict() num_levels = len(self.oqparam.imtls.array) rparams = {'grp_id', 'srcidx', 'occurrence_rate', 'weight', 'probs_occur', 'sid_', 'lon_', 'lat_'} for grp in self.csm.src_groups: gsims = csm_info.gsim_lt.get_gsims(grp.trt) cm = ContextMaker(grp.trt, gsims) rparams.update(cm.REQUIRES_RUPTURE_PARAMETERS) for dparam in cm.REQUIRES_DISTANCES: rparams.add(dparam + '_') zd[grp.id] = ProbabilityMap(num_levels, len(gsims)) zd.eff_ruptures = AccumDict(accum=0) # grp_id -> eff_ruptures self.rparams = sorted(rparams) self.sources_by_task = {} # task_no => src_ids return zd
[docs] def execute(self): """ Run in parallel `core_task(sources, sitecol, monitor)`, by parallelizing on the sources according to their weight and tectonic region type. """ oq = self.oqparam if oq.hazard_calculation_id and not oq.compare_with_classical: parent = util.read(self.oqparam.hazard_calculation_id) self.csm_info = parent['csm_info'] parent.close() self.calc_stats(parent) # post-processing return {} with self.monitor('managing sources', autoflush=True): smap = parallel.Starmap( self.core_task.__func__, hdf5path=self.datastore.filename) self.submit_sources(smap) self.calc_times = AccumDict(accum=numpy.zeros(3, F32)) try: acc = smap.reduce(self.agg_dicts, self.acc0()) self.store_rlz_info(acc.eff_ruptures) finally: with self.monitor('store source_info', autoflush=True): self.store_source_info(self.calc_times) if self.sources_by_task: num_tasks = max(self.sources_by_task) + 1 sbt = numpy.zeros( num_tasks, [('eff_ruptures', U32), ('eff_sites', U32), ('srcids', hdf5.vuint32)]) for task_no in range(num_tasks): sbt[task_no] = self.sources_by_task.get( task_no, (0, 0, U32([]))) self.datastore['sources_by_task'] = sbt self.sources_by_task.clear() if not self.calc_times: raise RuntimeError('All sources were filtered away!') self.calc_times.clear() # save a bit of memory return acc
[docs] def submit_sources(self, smap): """ Send the sources split in tasks """ oq = self.oqparam N, L = len(self.sitecol), len(oq.imtls.array) trt_sources = self.csm.get_trt_sources(optimize_dupl=True) maxweight = min(self.csm.get_maxweight( trt_sources, weight, oq.concurrent_tasks), 1E6) if oq.task_duration is None: # inferred # from 1 minute up to 6 hours td = max((maxweight * N * L) ** numpy.log10(4) / 3000, 60) else: # user given td = oq.task_duration param = dict( truncation_level=oq.truncation_level, imtls=oq.imtls, filter_distance=oq.filter_distance, reqv=oq.get_reqv(), pointsource_distance=oq.pointsource_distance, max_sites_disagg=oq.max_sites_disagg, task_duration=td, maxweight=maxweight) logging.info('ruptures_per_task = %(maxweight)d, ' 'task_duration = %(task_duration)ds', param) for trt, sources in trt_sources: heavy_sources = [] gsims = self.csm.info.gsim_lt.get_gsims(trt) if hasattr(sources, 'atomic') and sources.atomic: smap.submit(sources, self.src_filter, gsims, param, func=classical) else: # regroup the sources in blocks for block in block_splitter(sources, maxweight, weight): if block.weight > maxweight: heavy_sources.extend(block) smap.submit(block, self.src_filter, gsims, param) # heavy source are split on the master node if heavy_sources: logging.info('Found %d heavy sources %s, ...', len(heavy_sources), heavy_sources[0])
[docs] def save_hazard(self, acc, pmap_by_kind): """ Works by side effect by saving hcurves and hmaps on the datastore :param acc: ignored :param pmap_by_kind: a dictionary of ProbabilityMaps kind can be ('hcurves', 'mean'), ('hmaps', 'mean'), ... """ with self.monitor('saving statistics', autoflush=True): for kind in pmap_by_kind: # i.e. kind == 'hcurves-stats' pmaps = pmap_by_kind[kind] if kind == 'rlz_by_sid': # pmaps is actually a rlz_by_sid for sid, rlz in pmaps.items(): self.datastore['best_rlz'][sid] = rlz elif kind in ('hmaps-rlzs', 'hmaps-stats'): # pmaps is a list of R pmaps dset = self.datastore.getitem(kind) for r, pmap in enumerate(pmaps): for s in pmap: dset[s, r] = pmap[s].array # shape (M, P) elif kind in ('hcurves-rlzs', 'hcurves-stats'): dset = self.datastore.getitem(kind) for r, pmap in enumerate(pmaps): for s in pmap: dset[s, r] = pmap[s].array[:, 0] # shape L self.datastore.flush()
[docs] def post_execute(self, pmap_by_grp_id): """ Collect the hazard curves by realization and export them. :param pmap_by_grp_id: a dictionary grp_id -> hazard curves """ oq = self.oqparam try: csm_info = self.csm.info except AttributeError: csm_info = self.datastore['csm_info'] trt_by_grp = csm_info.grp_by("trt") grp_name = {grp.id: grp.name for sm in csm_info.source_models for grp in sm.src_groups} data = [] with self.monitor('saving probability maps', autoflush=True): for grp_id, pmap in pmap_by_grp_id.items(): if pmap: # pmap can be missing if the group is filtered away base.fix_ones(pmap) # avoid saving PoEs == 1 trt = trt_by_grp[grp_id] key = 'poes/grp-%02d' % grp_id self.datastore[key] = pmap self.datastore.set_attrs(key, trt=trt) extreme = max( get_extreme_poe(pmap[sid].array, oq.imtls) for sid in pmap) data.append((grp_id, grp_name[grp_id], extreme)) if oq.hazard_calculation_id is None and 'poes' in self.datastore: self.datastore.set_nbytes('poes') self.datastore['disagg_by_grp'] = numpy.array( sorted(data), grp_extreme_dt) # save a copy of the poes in hdf5cache with hdf5.File(self.hdf5cache) as cache: cache['oqparam'] = oq self.datastore.hdf5.copy('poes', cache) self.calc_stats(self.hdf5cache)
[docs] def calc_stats(self, parent): oq = self.oqparam hstats = oq.hazard_stats() # initialize datasets N = len(self.sitecol.complete) L = len(oq.imtls.array) P = len(oq.poes) M = len(oq.imtls) R = len(self.rlzs_assoc.realizations) S = len(hstats) if R > 1 and oq.individual_curves or not hstats: self.datastore.create_dset('hcurves-rlzs', F32, (N, R, L)) if oq.poes: self.datastore.create_dset('hmaps-rlzs', F32, (N, R, M, P)) if hstats: self.datastore.create_dset('hcurves-stats', F32, (N, S, L)) if oq.poes: self.datastore.create_dset('hmaps-stats', F32, (N, S, M, P)) if 'mean' in dict(hstats) and R > 1 and N <= oq.max_sites_disagg: self.datastore.create_dset('best_rlz', U32, (N,)) ct = oq.concurrent_tasks logging.info('Building hazard statistics with %d concurrent_tasks', ct) weights = [rlz.weight for rlz in self.rlzs_assoc.realizations] allargs = [ # this list is very fast to generate (getters.PmapGetter(parent, weights, t.sids, oq.poes), N, hstats, oq.individual_curves, oq.max_sites_disagg) for t in self.sitecol.split_in_tiles(ct)] parallel.Starmap(build_hazard, allargs, hdf5path=self.datastore.filename).reduce( self.save_hazard)
[docs]@base.calculators.add('preclassical') class PreCalculator(ClassicalCalculator): """ Calculator to filter the sources and compute the number of effective ruptures """ core_task = preclassical
def _build_stat_curve(poes, imtls, stat, weights): L = len(imtls.array) array = numpy.zeros((L, 1)) if isinstance(weights, list): # IMT-dependent weights # this is slower since the arrays are shorter for imt in imtls: slc = imtls(imt) ws = [w[imt] for w in weights] if sum(ws) == 0: # expect no data for this IMT continue array[slc] = stat(poes[:, slc], ws) else: array = stat(poes, weights) return ProbabilityCurve(array)
[docs]def build_hazard(pgetter, N, hstats, individual_curves, max_sites_disagg, monitor): """ :param pgetter: an :class:`openquake.commonlib.getters.PmapGetter` :param N: the total number of sites :param hstats: a list of pairs (statname, statfunc) :param individual_curves: if True, also build the individual curves :param max_sites_disagg: if there are less sites than this, store rup info :param monitor: instance of Monitor :returns: a dictionary kind -> ProbabilityMap The "kind" is a string of the form 'rlz-XXX' or 'mean' of 'quantile-XXX' used to specify the kind of output. """ with monitor('read PoEs'): pgetter.init() imtls, poes, weights = pgetter.imtls, pgetter.poes, pgetter.weights L = len(imtls.array) R = len(weights) S = len(hstats) pmap_by_kind = {'rlz_by_sid': {}} if R > 1 and individual_curves or not hstats: pmap_by_kind['hcurves-rlzs'] = [ProbabilityMap(L) for r in range(R)] if hstats: pmap_by_kind['hcurves-stats'] = [ProbabilityMap(L) for r in range(S)] if poes: pmap_by_kind['hmaps-stats'] = [ProbabilityMap(L) for r in range(S)] combine_mon = monitor('combine pmaps', measuremem=False) compute_mon = monitor('compute stats', measuremem=False) for sid in pgetter.sids: with combine_mon: pcurves = pgetter.get_pcurves(sid) if sum(pc.array.sum() for pc in pcurves) == 0: # no data continue with compute_mon: if hstats: arr = numpy.array([pc.array for pc in pcurves]) for s, (statname, stat) in enumerate(hstats.items()): pc = _build_stat_curve(arr, imtls, stat, weights) pmap_by_kind['hcurves-stats'][s][sid] = pc if poes: hmap = calc.make_hmap(pc, pgetter.imtls, poes, sid) pmap_by_kind['hmaps-stats'][s].update(hmap) if statname == 'mean' and R > 1 and N <= max_sites_disagg: rlz = pmap_by_kind['rlz_by_sid'] rlz[sid] = util.closest_to_ref( [p.array for p in pcurves], pc.array)['rlz'] if R > 1 and individual_curves or not hstats: for pmap, pc in zip(pmap_by_kind['hcurves-rlzs'], pcurves): pmap[sid] = pc if poes: pmap_by_kind['hmaps-rlzs'] = [ calc.make_hmap(pc, imtls, poes, sid) for pc in pcurves] return pmap_by_kind