diff --git a/configs/example/gem5_library/x86-gapbs-benchmarks.py b/configs/example/gem5_library/x86-gapbs-benchmarks.py
index bdc0d94..638d34b 100644
--- a/configs/example/gem5_library/x86-gapbs-benchmarks.py
+++ b/configs/example/gem5_library/x86-gapbs-benchmarks.py
@@ -64,8 +64,8 @@
 from gem5.isas import ISA
 from gem5.coherence_protocol import CoherenceProtocol
 from gem5.resources.resource import Resource
-
-from m5.stats.gem5stats import get_simstat
+from gem5.simulate.simulator import Simulator
+from gem5.simulate.exit_event import ExitEvent
 
 requires(
     isa_required=ISA.X86,
@@ -210,14 +210,26 @@
     readfile_contents=command,
 )
 
-root = Root(full_system=True, system=board)
 
-# sim_quantum must be set when KVM cores are used.
+def handle_exit():
+    print("Done booting Linux")
+    print("Resetting stats at the start of ROI!")
+    m5.stats.reset()
+    global start_tick
+    start_tick = m5.curTick()
+    processor.switch()
+    yield False  # E.g., continue the simulation.
+    print("Dump stats at the end of the ROI!")
+    m5.stats.dump()
+    yield True  # Stop the simulation. We're done.
 
-root.sim_quantum = int(1e9)
 
-board._pre_instantiate()
-m5.instantiate()
+simulator = Simulator(
+    board=board,
+    on_exit_event={
+        ExitEvent.EXIT: handle_exit(),
+    },
+)
 
 # We maintain the wall clock time.
 
@@ -232,74 +244,8 @@
 # the first ROI annotation in details. The X86Board currently does not support
 #  `work items started count reached`.
 
-exit_event = m5.simulate()
-
-# The first exit_event ends with a `workbegin` cause. This means that the
-# system started successfully and the execution on the program started. The
-# ROI begin is encountered.
-
-if exit_event.getCause() == "workbegin":
-
-    print("Done booting Linux")
-    print("Resetting stats at the start of ROI!")
-
-    m5.stats.reset()
-    start_tick = m5.curTick()
-
-    # We have completed up to this step using KVM cpu. Now we switch to timing
-    # cpu for detailed simulation.
-
-    processor.switch()
-else:
-    print("Unexpected termination of simulation before ROI was reached!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# The next exit_event is to simulate the ROI. It should be exited with a cause
-# marked by `workend`. This implies that the first annotation is successfully
-# completed.
-
-exit_event = m5.simulate()
-
-# Reached the end of first ROI.
-# We dump the stats here.
-
-# We exepect that ROI ends with `workend`. Otherwise the simulation ended
-# unexpectedly.
-if exit_event.getCause() == "workend":
-    print("Dump stats at the end of the ROI!")
-
-    m5.stats.dump()
-    end_tick = m5.curTick()
-else:
-    print("Unexpected termination of simulation while ROI was being executed!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# We get simInsts using get_simstat and output it in the final print statement.
-
-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(
-    gem5stats.to_json()["system"]["processor"]["switch0"]["core"][
-        "exec_context.thread_0"
-    ]["numInsts"]["value"]
-) + float(
-    gem5stats.to_json()["system"]["processor"]["switch1"]["core"][
-        "exec_context.thread_0"
-    ]["numInsts"]["value"]
-)
+simulator.run()
+end_tick = m5.curTick()
 # Since we simulated the ROI in details, therefore, simulation is over at this
 # point.
 
@@ -313,8 +259,9 @@
 print("Performance statistics:")
 
 print("Simulated time in ROI: %.2fs" % ((end_tick - start_tick) / 1e12))
-print("Instructions executed in ROI: %d" % ((roi_insts)))
-print("Ran a total of", m5.curTick() / 1e12, "simulated seconds")
+print(
+    "Ran a total of", simulator.get_current_tick() / 1e12, "simulated seconds"
+)
 print(
     "Total wallclock time: %.2fs, %.2f min"
     % (time.time() - globalStart, (time.time() - globalStart) / 60)
diff --git a/configs/example/gem5_library/x86-npb-benchmarks.py b/configs/example/gem5_library/x86-npb-benchmarks.py
index 385760c..2cb3143 100644
--- a/configs/example/gem5_library/x86-npb-benchmarks.py
+++ b/configs/example/gem5_library/x86-npb-benchmarks.py
@@ -61,6 +61,8 @@
 from gem5.isas import ISA
 from gem5.coherence_protocol import CoherenceProtocol
 from gem5.resources.resource import Resource
+from gem5.simulate.simulator import Simulator
+from gem5.simulate.simulator import ExitEvent
 
 from m5.stats.gem5stats import get_simstat
 from m5.util import warn
@@ -209,17 +211,47 @@
     readfile_contents=command,
 )
 
-# We need this for long running processes.
-m5.disableAllListeners()
+# The first exit_event ends with a `workbegin` cause. This means that the
+# system started successfully and the execution on the program started.
+def handle_workbegin():
+    print("Done booting Linux")
+    print("Resetting stats at the start of ROI!")
 
-root = Root(full_system=True, system=board)
+    m5.stats.reset()
 
-# sim_quantum must be set when KVM cores are used.
+    # We have completed up to this step using KVM cpu. Now we switch to timing
+    # cpu for detailed simulation.
 
-root.sim_quantum = int(1e9)
+    # # Next, we need to check if the user passed a value for --ticks. If yes,
+    # then we limit out execution to this number of ticks during the ROI.
+    # Otherwise, we simulate until the ROI ends.
+    processor.switch()
+    if args.ticks:
+        # schedule an exit event for this amount of ticks in the future.
+        # The simulation will then continue.
+        m5.scheduleTickExitFromCurrent(args.ticks)
+    yield False
 
-board._pre_instantiate()
-m5.instantiate()
+
+# The next exit_event is to simulate the ROI. It should be exited with a cause
+# marked by `workend`.
+
+# We exepect that ROI ends with `workend` or `simulate() limit reached`.
+# Otherwise the simulation ended unexpectedly.
+def handle_workend():
+    print("Dump stats at the end of the ROI!")
+
+    m5.stats.dump()
+    yield False
+
+
+simulator = Simulator(
+    board=board,
+    on_exit_event={
+        ExitEvent.WORKBEGIN: handle_workbegin(),
+        ExitEvent.WORKEND: handle_workend(),
+    },
+)
 
 # We maintain the wall clock time.
 
@@ -229,96 +261,12 @@
 print("Using KVM cpu")
 
 # We start the simulation.
-
-exit_event = m5.simulate()
-
-# The first exit_event ends with a `workbegin` cause. This means that the
-# system started successfully and the execution on the program started.
-
-if exit_event.getCause() == "workbegin":
-
-    print("Done booting Linux")
-    print("Resetting stats at the start of ROI!")
-
-    m5.stats.reset()
-    start_tick = m5.curTick()
-
-    # We have completed up to this step using KVM cpu. Now we switch to timing
-    # cpu for detailed simulation.
-
-    processor.switch()
-else:
-    # `workbegin` call was never encountered.
-
-    print("Unexpected termination of simulation before ROI was reached!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# The next exit_event is to simulate the ROI. It should be exited with a cause
-# marked by `workend`.
-
-# Next, we need to check if the user passed a value for --ticks. If yes,
-# then we limit out execution to this number of ticks during the ROI.
-# Otherwise, we simulate until the ROI ends.
-if args.ticks:
-    exit_event = m5.simulate(args.ticks)
-else:
-    exit_event = m5.simulate()
-
-
-# Reached the end of ROI.
-# We dump the stats here.
-
-# We exepect that ROI ends with `workend` or `simulate() limit reached`.
-# Otherwise the simulation ended unexpectedly.
-if exit_event.getCause() == "workend":
-    print("Dump stats at the end of the ROI!")
-
-    m5.stats.dump()
-    end_tick = m5.curTick()
-elif (
-    exit_event.getCause() == "simulate() limit reached"
-    and args.ticks is not None
-):
-    print("Dump stats at the end of {} ticks in the ROI".format(args.ticks))
-
-    m5.stats.dump()
-    end_tick = m5.curTick()
-else:
-    print("Unexpected termination of simulation while ROI was being executed!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
+simulator.run()
 
 # We need to note that the benchmark is not executed completely till this
 # point, but, the ROI has. We collect the essential statistics here before
 # resuming the simulation again.
 
-# We get simInsts using get_simstat and output it in the final
-# print statement.
-
-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(
-    gem5stats.to_json()["system"]["processor"]["switch0"]["core"][
-        "exec_context.thread_0"
-    ]["numInsts"]["value"]
-) + float(
-    gem5stats.to_json()["system"]["processor"]["switch1"]["core"][
-        "exec_context.thread_0"
-    ]["numInsts"]["value"]
-)
-
 # Simulation is over at this point. We acknowledge that all the simulation
 # events were successful.
 print("All simulation events were successful.")
@@ -328,9 +276,16 @@
 print()
 print("Performance statistics:")
 
-print("Simulated time in ROI: %.2fs" % ((end_tick - start_tick) / 1e12))
-print("Instructions executed in ROI: %d" % ((roi_insts)))
-print("Ran a total of", m5.curTick() / 1e12, "simulated seconds")
+# manually calculate ROI time if ticks arg is used in case the
+# entire ROI wasn't simulated
+if args.ticks:
+    print(f"Simulated time in ROI (to tick): {args.ticks/ 1e12}s")
+else:
+    print(f"Simulated time in ROI: {simulator.get_roi_ticks()[0] / 1e12}s")
+
+print(
+    f"Ran a total of {simulator.get_current_tick() / 1e12} simulated seconds"
+)
 print(
     "Total wallclock time: %.2fs, %.2f min"
     % (time.time() - globalStart, (time.time() - globalStart) / 60)
diff --git a/configs/example/gem5_library/x86-parsec-benchmarks.py b/configs/example/gem5_library/x86-parsec-benchmarks.py
index 8218380..190c0a0 100644
--- a/configs/example/gem5_library/x86-parsec-benchmarks.py
+++ b/configs/example/gem5_library/x86-parsec-benchmarks.py
@@ -60,8 +60,8 @@
 from gem5.isas import ISA
 from gem5.coherence_protocol import CoherenceProtocol
 from gem5.resources.resource import Resource
-
-from m5.stats.gem5stats import get_simstat
+from gem5.simulate.simulator import Simulator
+from gem5.simulate.exit_event import ExitEvent
 
 # We check for the required gem5 build.
 
@@ -195,17 +195,28 @@
     readfile_contents=command,
 )
 
-# We need this for long running processes.
-m5.disableAllListeners()
+# functions to handle different exit events during the simuation
+def handle_workbegin():
+    print("Done booting Linux")
+    print("Resetting stats at the start of ROI!")
+    m5.stats.reset()
+    processor.switch()
+    yield False
 
-root = Root(full_system=True, system=board)
 
-# sim_quantum must be set if KVM cores are used.
+def handle_workend():
+    print("Dump stats at the end of the ROI!")
+    m5.stats.dump()
+    yield True
 
-root.sim_quantum = int(1e9)
 
-board._pre_instantiate()
-m5.instantiate()
+simulator = Simulator(
+    board=board,
+    on_exit_event={
+        ExitEvent.WORKBEGIN: handle_workbegin(),
+        ExitEvent.WORKEND: handle_workend(),
+    },
+)
 
 # We maintain the wall clock time.
 
@@ -214,83 +225,11 @@
 print("Running the simulation")
 print("Using KVM cpu")
 
-start_tick = m5.curTick()
-end_tick = m5.curTick()
 m5.stats.reset()
 
 # We start the simulation
+simulator.run()
 
-exit_event = m5.simulate()
-
-# The first exit_event ends with a `workbegin` cause. This means that the
-# system booted successfully and the execution on the program started.
-
-if exit_event.getCause() == "workbegin":
-
-    print("Done booting Linux")
-    print("Resetting stats at the start of ROI!")
-
-    m5.stats.reset()
-    start_tick = m5.curTick()
-
-    # We have completed up to this step using KVM cpu. Now we switch to timing
-    # cpu for detailed simulation.
-
-    processor.switch()
-else:
-    # `workbegin` call was never encountered.
-
-    print("Unexpected termination of simulation before ROI was reached!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# The next exit_event is to simulate the ROI. It should be exited with a cause
-# marked by `workend`.
-
-exit_event = m5.simulate()
-
-# Reached the end of ROI.
-# We dump the stats here.
-
-# We exepect that ROI ends with `workend`. Otherwise the simulation ended
-# unexpectedly.
-if exit_event.getCause() == "workend":
-    print("Dump stats at the end of the ROI!")
-
-    m5.stats.dump()
-    end_tick = m5.curTick()
-else:
-    print("Unexpected termination of simulation while ROI was being executed!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# ROI has ended here, and we get `simInsts` using get_simstat and print it in
-# the final print statement.
-
-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(
-    gem5stats.to_json()["system"]["processor"]["switch0"]["core"][
-        "exec_context.thread_0"
-    ]["numInsts"]["value"]
-) + float(
-    gem5stats.to_json()["system"]["processor"]["switch1"]["core"][
-        "exec_context.thread_0"
-    ]["numInsts"]["value"]
-)
-
-# Simulation is over at this point. We acknowledge that all the simulation
-# events were successful.
 print("All simulation events were successful.")
 
 # We print the final simulation statistics.
@@ -299,9 +238,10 @@
 print()
 print("Performance statistics:")
 
-print("Simulated time in ROI: %.2fs" % ((end_tick - start_tick) / 1e12))
-print("Instructions executed in ROI: %d" % ((roi_insts)))
-print("Ran a total of", m5.curTick() / 1e12, "simulated seconds")
+print("Simulated time in ROI: " + ((str(simulator.get_roi_ticks()[0]))))
+print(
+    "Ran a total of", simulator.get_current_tick() / 1e12, "simulated seconds"
+)
 print(
     "Total wallclock time: %.2fs, %.2f min"
     % (time.time() - globalStart, (time.time() - globalStart) / 60)
diff --git a/configs/example/gem5_library/x86-spec-cpu2006-benchmarks.py b/configs/example/gem5_library/x86-spec-cpu2006-benchmarks.py
index d656e61..8f39f49 100644
--- a/configs/example/gem5_library/x86-spec-cpu2006-benchmarks.py
+++ b/configs/example/gem5_library/x86-spec-cpu2006-benchmarks.py
@@ -66,6 +66,8 @@
 from gem5.isas import ISA
 from gem5.coherence_protocol import CoherenceProtocol
 from gem5.resources.resource import Resource, CustomDiskImageResource
+from gem5.simulate.simulator import Simulator
+from gem5.simulate.exit_event import ExitEvent
 
 from m5.stats.gem5stats import get_simstat
 from m5.util import warn
@@ -265,17 +267,23 @@
     readfile_contents=command,
 )
 
-# We need this for long running processes.
-m5.disableAllListeners()
 
-root = Root(full_system=True, system=board)
+def handle_exit():
+    print("Done bootling Linux")
+    print("Resetting stats at the start of ROI!")
+    m5.stats.reset()
+    yield False  # E.g., continue the simulation.
+    print("Dump stats at the end of the ROI!")
+    m5.stats.dump()
+    yield True  # Stop the simulation. We're done.
 
-# sim_quantum must be set when KVM cores are used.
 
-root.sim_quantum = int(1e9)
-
-board._pre_instantiate()
-m5.instantiate()
+simulator = Simulator(
+    board=board,
+    on_exit_event={
+        ExitEvent.EXIT: handle_exit(),
+    },
+)
 
 # We maintain the wall clock time.
 
@@ -284,92 +292,10 @@
 print("Running the simulation")
 print("Using KVM cpu")
 
-start_tick = m5.curTick()
-end_tick = m5.curTick()
 m5.stats.reset()
 
-exit_event = m5.simulate()
-
-if exit_event.getCause() == "m5_exit instruction encountered":
-    # We have completed booting the OS using KVM cpu
-    # Reached the start of ROI
-
-    print("Done booting Linux")
-    print("Resetting stats at the start of ROI!")
-
-    m5.stats.reset()
-    start_tick = m5.curTick()
-
-    # 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!")
-    m5.stats.dump()
-    end_tick = m5.curTick()
-    m5.stats.reset()
-
-else:
-    # `m5_exit instruction encountered` was never reached
-
-    print("Unexpected termination of simulation while ROI was being executed!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# We need to copy back the contents of the `speclogs' directory to
-# m5.options.outdir
-
-exit_event = m5.simulate()
-
-if exit_event.getCause() == "m5_exit instruction encountered":
-    print("Output logs copied!")
-
-else:
-    print("Unexpected termination of simulation while copying speclogs!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-m5.stats.dump()
-end_tick = m5.curTick()
-m5.stats.reset()
+# We start the simulation
+simulator.run()
 
 # Simulation is over at this point. We acknowledge that all the simulation
 # events were successful.
@@ -378,9 +304,10 @@
 
 print("Performance statistics:")
 
-print("Simulated time: %.2fs" % ((end_tick - start_tick) / 1e12))
-print("Instructions executed: %d" % ((roi_insts)))
-print("Ran a total of", m5.curTick() / 1e12, "simulated seconds")
+print("Simulated time: " + ((str(simulator.get_roi_ticks()[0]))))
+print(
+    "Ran a total of", simulator.get_current_tick() / 1e12, "simulated seconds"
+)
 print(
     "Total wallclock time: %.2fs, %.2f min"
     % (time.time() - globalStart, (time.time() - globalStart) / 60)
diff --git a/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py b/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py
index 2bc948a..c4af7f5 100644
--- a/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py
+++ b/configs/example/gem5_library/x86-spec-cpu2017-benchmarks.py
@@ -64,6 +64,8 @@
 from gem5.isas import ISA
 from gem5.coherence_protocol import CoherenceProtocol
 from gem5.resources.resource import Resource, CustomDiskImageResource
+from gem5.simulate.simulator import Simulator
+from gem5.simulate.exit_event import ExitEvent
 
 from m5.stats.gem5stats import get_simstat
 from m5.util import warn
@@ -281,17 +283,23 @@
     readfile_contents=command,
 )
 
-# We need this for long running processes.
-m5.disableAllListeners()
 
-root = Root(full_system=True, system=board)
+def handle_exit():
+    print("Done bootling Linux")
+    print("Resetting stats at the start of ROI!")
+    m5.stats.reset()
+    yield False  # E.g., continue the simulation.
+    print("Dump stats at the end of the ROI!")
+    m5.stats.dump()
+    yield True  # Stop the simulation. We're done.
 
-# sim_quantum must be set when KVM cores are used.
 
-root.sim_quantum = int(1e9)
-
-board._pre_instantiate()
-m5.instantiate()
+simulator = Simulator(
+    board=board,
+    on_exit_event={
+        ExitEvent.EXIT: handle_exit(),
+    },
+)
 
 # We maintain the wall clock time.
 
@@ -300,92 +308,21 @@
 print("Running the simulation")
 print("Using KVM cpu")
 
-start_tick = m5.curTick()
-end_tick = m5.curTick()
 m5.stats.reset()
 
-exit_event = m5.simulate()
+# We start the simulation
+simulator.run()
 
-if exit_event.getCause() == "m5_exit instruction encountered":
-    # We have completed booting the OS using KVM cpu
-    # Reached the start of ROI
-
-    print("Done booting Linux")
-    print("Resetting stats at the start of ROI!")
-
-    m5.stats.reset()
-    start_tick = m5.curTick()
-
-    # We switch to timing cpu for detailed simulation.
-
-    processor.switch()
-else:
-    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!")
-    m5.stats.dump()
-    end_tick = m5.curTick()
-    m5.stats.reset()
-
-else:
-    print("Unexpected termination of simulation while ROI was being executed!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
-
-# We need to copy back the contents of the `speclogs' directory to
-# m5.options.outdir
-
-exit_event = m5.simulate()
-
-if exit_event.getCause() == "m5_exit instruction encountered":
-    print("Output logs copied!")
-
-else:
-    print("Unexpected termination of simulation while copying speclogs!")
-    print(
-        "Exiting @ tick {} because {}.".format(
-            m5.curTick(), exit_event.getCause()
-        )
-    )
-    exit(-1)
+# We print the final simulation statistics.
 
 print("Done with the simulation")
 print()
 print("Performance statistics:")
 
-print("Simulated time in ROI: %.2fs" % ((end_tick - start_tick) / 1e12))
-print("Instructions executed in ROI: %d" % ((roi_insts)))
-print("Ran a total of", m5.curTick() / 1e12, "simulated seconds")
+print("Simulated time in ROI: " + ((str(simulator.get_roi_ticks()[0]))))
+print(
+    "Ran a total of", simulator.get_current_tick() / 1e12, "simulated seconds"
+)
 print(
     "Total wallclock time: %.2fs, %.2f min"
     % (time.time() - globalStart, (time.time() - globalStart) / 60)