def get_stats(self) -> Dict:
"""
Obtain the current simulation statistics as a Dictionary, conforming
to a JSON-style schema.
**Warning:** Will throw an Exception if called before `run()`. The
board must be initialized before obtaining statistics
"""
if not self._instantiated:
raise Exception(
"Cannot obtain simulation statistics prior to inialization.")
return get_simstat(self._root).to_json()
# We switch to timing cpu for detailed simulation.
processor.switch()
else:
# `m5_exit instruction encountered` was never reached
print("Unexpected termination of simulation before ROI was reached!")
print("Exiting @ tick {} because {}.".format(m5.curTick(),
exit_event.getCause()))
exit(-1)
# Simulate the ROI
exit_event = m5.simulate()
# Reached the end of ROI
gem5stats = get_simstat(root)
# We get the number of committed instructions from the timing
# cores. We then sum and print them at the end.
roi_insts = float(\
json.loads(gem5stats.dumps())\
["system"]["processor"]["cores2"]["core"]["exec_context.thread_0"]\
["numInsts"]["value"]) + float(\
json.loads(gem5stats.dumps())\
["system"]["processor"]["cores3"]["core"]["exec_context.thread_0"]\
["numInsts"]["value"]\
)
if exit_event.getCause() == "m5_exit instruction encountered":
print("Dump stats at the end of the ROI!")