Source code for spinn_front_end_common.interface.interface_functions.graph_measurer
from spinn_utilities.progress_bar import ProgressBar
# pacman imports
from pacman.utilities.utility_objs import ResourceTracker
from pacman.utilities.algorithm_utilities import placer_algorithm_utilities
# general imports
import logging
logger = logging.getLogger(__name__)
[docs]class GraphMeasurer(object):
""" Works out how many chips a machine graph needs
"""
__slots__ = []
def __call__(self, machine_graph, machine):
"""
:param machine_graph: The machine_graph to measure
:type machine_graph:\
:py:class:`pacman.model.graph.machine.MachineGraph`
:return: The size of the graph in number of chips
:rtype: int
"""
# check that the algorithm can handle the constraints
ResourceTracker.check_constraints(machine_graph.vertices)
ordered_vertices = \
placer_algorithm_utilities.sort_vertices_by_known_constraints(
machine_graph.vertices)
# Iterate over vertices and allocate
progress = ProgressBar(machine_graph.n_vertices, "Measuring the graph")
resource_tracker = ResourceTracker(machine)
for vertex in progress.over(ordered_vertices):
resource_tracker.allocate_constrained_resources(
vertex.resources_required, vertex.constraints)
return len(resource_tracker.keys)