diff --git a/configs/example/gem5_library/x86-npb-benchmarks.py b/configs/example/gem5_library/x86-npb-benchmarks.py
new file mode 100644
index 0000000..ba7b17c
--- /dev/null
+++ b/configs/example/gem5_library/x86-npb-benchmarks.py
@@ -0,0 +1,332 @@
+# Copyright (c) 2021 The Regents of the University of California.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""
+Script to run NAS parallel benchmarks with gem5. The script expects the
+benchmark program to run. The input is in the format
+<benchmark_prog>.<class>.x .The system is fixed with 2 CPU cores, MESI
+Two Level system cache and 3 GB DDR4 memory. It uses the x86 board.
+
+This script will count the total number of instructions executed
+in the ROI. It also tracks how much wallclock and simulated time.
+
+Usage:
+------
+
+```
+scons build/X86/gem5.opt
+./build/X86/gem5.opt \
+    configs/example/gem5_library/x86-npb-benchmarks.py \
+    --benchmark <benchmark_name> \
+    --size <benchmark_class>
+```
+"""
+
+import argparse
+import time
+
+import m5
+from m5.objects import Root
+
+from gem5.utils.requires import requires
+from gem5.components.boards.x86_board import X86Board
+from gem5.components.memory import DualChannelDDR4_2400
+from gem5.components.processors.simple_switchable_processor import(
+    SimpleSwitchableProcessor,
+)
+from gem5.components.processors.cpu_types import CPUTypes
+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 m5.util import warn
+
+requires(
+    isa_required = ISA.X86,
+    coherence_protocol_required=CoherenceProtocol.MESI_TWO_LEVEL,
+    kvm_required=True,
+)
+
+# Following are the list of benchmark programs for npb.
+
+benchmark_choices = ["bt", "cg", "ep", "ft", "is", "lu", "mg", "sp"]
+
+# We are restricting classes of NPB to A, B and C as the other classes (D and
+# F) require main memory size of more than 3 GB. The X86Board is currently
+# limited to 3 GB of memory. This limitation is explained later in line 136.
+
+# The resource disk has binaries for class D. However, only `ep` benchmark
+# works with class D in the current configuration. More information on the
+# memory footprint for NPB is available at https://arxiv.org/abs/2010.13216
+
+size_choices = ["A", "B", "C"]
+
+parser = argparse.ArgumentParser(
+    description="An example configuration script to run the npb benchmarks."
+)
+
+# The only positional argument accepted is the benchmark name in this script.
+
+parser.add_argument(
+    "--benchmark",
+    type = str,
+    required=True,
+    help = "Input the benchmark program to execute.",
+    choices = benchmark_choices,
+)
+
+parser.add_argument(
+    "--size",
+    type = str,
+    required=True,
+    help = "Input the class of the program to simulate.",
+    choices = size_choices,
+)
+
+parser.add_argument(
+    "--maxinsts",
+    type = int,
+    help = "Optionally put the maximum number of instructions to execute \
+    during ROI simulation. It accepts an integer number."
+)
+
+args = parser.parse_args()
+
+# The simulation may fail in the case of `mg` with class C as it uses 3.3 GB
+# of memory (more information is availabe at https://arxiv.org/abs/2010.13216).
+# We warn the user here.
+
+if args.benchmark == "mg" and args.size == "C":
+    warn("mg.C uses 3.3 GB of memory. Currently we are simulating 3 GB\
+    of main memory in the system.")
+
+# The simulation will fail in the case of `ft` with class C. We warn the user
+# here.
+elif args.benchmark == "ft" and args.size == "C":
+    warn("There is not enough memory for ft.C. Currently we are\
+    simulating 3 GB of main memory in the system.")
+
+# Checking for the maximum number of instructions, if provided by the user.
+
+# Setting up all the fixed system parameters here
+# Caches: MESI Two Level Cache Hierarchy
+
+from gem5.components.cachehierarchies.ruby.\
+    mesi_two_level_cache_hierarchy import(
+    MESITwoLevelCacheHierarchy,
+)
+
+cache_hierarchy = MESITwoLevelCacheHierarchy(
+    l1d_size = "32kB",
+    l1d_assoc = 8,
+    l1i_size="32kB",
+    l1i_assoc=8,
+    l2_size="256kB",
+    l2_assoc=16,
+    num_l2_banks=2,
+)
+# Memory: Dual Channel DDR4 2400 DRAM device.
+# The X86 board only supports 3 GB of main memory.
+
+memory = DualChannelDDR4_2400(size = "3GB")
+
+# Here we setup the processor. This is a special switchable processor in which
+# a starting core type and a switch core type must be specified. Once a
+# configuration is instantiated a user may call `processor.switch()` to switch
+# from the starting core types to the switch core types. In this simulation
+# we start with KVM cores to simulate the OS boot, then switch to the Timing
+# cores for the command we wish to run after boot.
+
+processor = SimpleSwitchableProcessor(
+    starting_core_type=CPUTypes.KVM,
+    switch_core_type=CPUTypes.TIMING,
+    num_cores=2,
+)
+
+# Here we setup the board. The X86Board allows for Full-System X86 simulations
+
+board = X86Board(
+    clk_freq="3GHz",
+    processor=processor,
+    memory=memory,
+    cache_hierarchy=cache_hierarchy,
+)
+
+# Here we set the FS workload, i.e., npb benchmark program
+# After simulation has ended you may inspect
+# `m5out/system.pc.com_1.device` to the stdout, if any.
+
+# After the system boots, we execute the benchmark program and wait till the
+# ROI `workbegin` annotation is reached (m5_work_begin()). We start collecting
+# the number of committed instructions till ROI ends (marked by `workend`).
+# We then finish executing the rest of the benchmark.
+
+# Also, we sleep the system for some time so that the output is printed
+# properly.
+
+command="/home/gem5/NPB3.3-OMP/bin/{}.{}.x;".format(args.benchmark,args.size)\
+    + "sleep 5;" \
+    + "m5 exit;"
+
+board.set_kernel_disk_workload(
+    # The x86 linux kernel will be automatically downloaded to the
+    # `~/.cache/gem5` directory if not already present.
+    # npb benchamarks was tested with kernel version 4.19.83
+    kernel=Resource(
+        "x86-linux-kernel-4.19.83",
+    ),
+    # The x86-npb image will be automatically downloaded to the
+    # `~/.cache/gem5` directory if not already present.
+    disk_image=Resource(
+        "x86-npb",
+    ),
+    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")
+
+# 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 --maxinsts. If yes,
+# then we limit out execution to this time only. Otherwise, we simulate until
+# the ROI ends.
+if args.maxinsts is None:
+    exit_event = m5.simulate()
+else:
+    exit_event = m5.simulate(args.maxinsts)
+
+
+# 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.maxinsts is not None:
+    print("Dump stats at the end of {} instructions".format(args.maxinsts))
+
+    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 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"]["cores2"]["core"]["exec_context.thread_0"]\
+    ["numInsts"]["value"]
+) + float(\
+    gem5stats.to_json()\
+    ["system"]["processor"]["cores3"]["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.
+
+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("Total wallclock time: %.2fs, %.2f min" % \
+            (time.time()-globalStart, (time.time()-globalStart)/60))
diff --git a/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py b/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py
index efa838d..f0def78 100644
--- a/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py
+++ b/tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py
@@ -103,7 +103,34 @@
             "gem5_library",
             "x86-parsec-benchmarks.py",
         ),
-        config_args=["--benchmark","blackscholes", "--size","simsmall"],
+        config_args=["--benchmark","blackscholes","--size","simsmall"],
+        valid_isas=(constants.x86_tag,),
+        protocol="MESI_Two_Level",
+        valid_hosts=constants.supported_hosts,
+        length=constants.long_tag,
+    )
+
+if os.access("/dev/kvm", mode=os.R_OK | os.W_OK):
+    # The x86-npb-benchmarks uses KVM cores, this test will therefore only be
+    # run on systems that support KVM.
+    gem5_verify_config(
+        name="test-gem5-library-example-x86-npb-benchmarks",
+        fixtures=(),
+        verifiers=(),
+        config=joinpath(
+            config.base_dir,
+            "configs",
+            "example",
+            "gem5_library",
+            "x86-npb-benchmarks.py",
+        ),
+        config_args=["--benchmark",
+            "bt",
+            "--size",
+            "A",
+            "--maxinsts",
+            "5000000000"
+        ],
         valid_isas=(constants.x86_tag,),
         protocol="MESI_Two_Level",
         valid_hosts=constants.supported_hosts,