self._build_graph()
+ def _compute_stream_intersections(self):
+ # Pre-compute the trimmer range to use for each port in the graph, when
+ # stream intersection mode is enabled.
+ self._stream_inter_port_to_range = {}
+
+ for src_comp_and_spec in self._src_comps_and_specs:
+ try:
+ inputs = src_comp_and_spec.spec.params['inputs']
+ except KeyError as e:
+ raise ValueError(
+ 'all source components must be created with an "inputs" parameter in stream intersection mode'
+ ) from e
+
+ params = {'inputs': inputs}
+
+ # query the port's component for the `babeltrace.trace-info`
+ # object which contains the range for each stream, from which we can
+ # compute the intersection of the streams in each trace.
+ query_exec = bt2.QueryExecutor(
+ src_comp_and_spec.spec.component_class, 'babeltrace.trace-info', params
+ )
+ trace_infos = query_exec.query()
+
+ for trace_info in trace_infos:
+ begin = max(
+ [stream['range-ns']['begin'] for stream in trace_info['streams']]
+ )
+ end = min(
+ [stream['range-ns']['end'] for stream in trace_info['streams']]
+ )
+
+ # Each port associated to this trace will have this computed
+ # range.
+ for stream in trace_info['streams']:
+ # A port name is unique within a component, but not
+ # necessarily across all components. Use a component
+ # and port name pair to make it unique across the graph.
+ port_name = str(stream['port-name'])
+ key = (src_comp_and_spec.comp.addr, port_name)
+ self._stream_inter_port_to_range[key] = (begin, end)
+
def _validate_source_component_specs(self, comp_specs):
for comp_spec in comp_specs:
if (
return msg
def _create_stream_intersection_trimmer(self, component, port):
- # find the original parameters specified by the user to create
- # this port's component to get the `inputs` parameter
- for src_comp_and_spec in self._src_comps_and_specs:
- if component == src_comp_and_spec.comp:
- break
-
- try:
- inputs = src_comp_and_spec.spec.params['inputs']
- except Exception as e:
- raise ValueError(
- 'all source components must be created with an "inputs" parameter in stream intersection mode'
- ) from e
-
- params = {'inputs': inputs}
-
- # query the port's component for the `babeltrace.trace-info`
- # object which contains the stream intersection range for each
- # exposed trace
- query_exec = bt2.QueryExecutor(
- src_comp_and_spec.comp.cls, 'babeltrace.trace-info', params
- )
- trace_info_res = query_exec.query()
- begin = None
- end = None
-
- # find the trace info for this port's trace
- try:
- for trace_info in trace_info_res:
- for stream in trace_info['streams']:
- if stream['port-name'] == port.name:
- range_ns = trace_info['intersection-range-ns']
- begin = range_ns['begin']
- end = range_ns['end']
- break
- except Exception:
- pass
-
- if begin is None or end is None:
- raise RuntimeError(
- 'cannot find stream intersection range for port "{}"'.format(port.name)
- )
-
- name = 'trimmer-{}-{}'.format(src_comp_and_spec.comp.name, port.name)
+ key = (component.addr, port.name)
+ begin, end = self._stream_inter_port_to_range[key]
+ name = 'trimmer-{}-{}'.format(component.name, port.name)
return self._create_trimmer(begin, end, name)
def _create_muxer(self):
comp = self._create_comp(comp_spec)
self._src_comps_and_specs.append(_ComponentAndSpec(comp, comp_spec))
+ if self._stream_intersection_mode:
+ self._compute_stream_intersections()
+
# Now we connect the ports which exist at this point. We allow
# self._graph_port_added() to automatically connect _new_ ports.
self._connect_ports = True