def _instantiate(self) -> None:
"""
This method will instantiate the board and carry out necessary
boilerplate code before the instantiation such as setting up root and
setting the sim_quantum (if running in KVM mode).
"""
if not self._instantiated:
root = Root(full_system=self._full_system, board=self._board)
# We take a copy of the Root in case it's required elsewhere
# (for example, in `get_stats()`).
self._root = root
if CPUTypes.KVM in [
core.get_type()
for core in self._board.get_processor().get_cores()
]:
m5.ticks.fixGlobalFrequency()
root.sim_quantum = m5.ticks.fromSeconds(0.001)
m5.instantiate()
self._instantiated = True
# The location of the x86 SPEC CPU 2017 image
disk_image=CustomDiskImageResource(
args.image,
disk_root_partition=args.partition,
),
readfile_contents=command,
)
# We need this for long running processes.
m5.disableAllListeners()
root = Root(full_system=True, system=board)
# sim_quantum must be set when KVM cores are used.
root.sim_quantum = int(1e9)
m5.instantiate()
# We maintain the wall clock time.
globalStart = time.time()
print("Running the simulation")
print("Using KVM cpu")
start_tick = m5.curTick()
end_tick = m5.curTick()
m5.stats.reset()
exit_event = m5.simulate()
