Index: LNTBased/MicroBenchmarks/XRay/CMakeLists.txt
===================================================================
--- /dev/null
+++ LNTBased/MicroBenchmarks/XRay/CMakeLists.txt
@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.7)
+
+include(CheckCXXCompilerFlag)
+check_cxx_compiler_flag(-fxray-instrument COMPILER_HAS_FXRAY_INSTRUMENT)
+
+if("${ARCH}" STREQUAL "x86_64" AND "${COMPILER_HAS_FXRAY_INSTRUMENT}")
+  add_subdirectory(benchmark-1.2.0)
+
+  set(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -std=c++11 -Wl,--gc-sections -fxray-instrument")
+  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fxray-instrument")
+  add_executable(retref-bench XRay/retref-bench.cc)
+  target_link_libraries(retref-bench benchmark)
+endif()
+
Index: LNTBased/MicroBenchmarks/XRay/TestModule
===================================================================
--- /dev/null
+++ LNTBased/MicroBenchmarks/XRay/TestModule
@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# -*- Python -*-
+
+import microbenchmark
+
+class RetrefBench(microbenchmark.TestModule):
+  def execute_test(self, options, make_variables, config):
+    result = self.build_microbenchmark(options, make_variables)
+    if result is not None:
+      return result;
+
+    return self.run_microbenchmark(options, 'retref-bench')
+
+test_class = RetrefBench
+
+if __name__ == '__main__':
+    test_class().main()
Index: LNTBased/MicroBenchmarks/XRay/XRay
===================================================================
--- /dev/null
+++ LNTBased/MicroBenchmarks/XRay/XRay
@@ -0,0 +1 @@
+../../../MicroBenchmarks/XRay/
\ No newline at end of file
Index: LNTBased/MicroBenchmarks/XRay/benchmark-1.2.0
===================================================================
--- /dev/null
+++ LNTBased/MicroBenchmarks/XRay/benchmark-1.2.0
@@ -0,0 +1 @@
+../../../MicroBenchmarks/libs/benchmark-1.2.0
\ No newline at end of file
Index: LNTBased/lib/microbenchmark.py
===================================================================
--- /dev/null
+++ LNTBased/lib/microbenchmark.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+# -*- Python -*-
+
+import csv
+import os
+import StringIO
+import subprocess
+
+from lnt.tests import nt
+from lnt.testing import TestSamples, PASS, FAIL, XFAIL
+
+class TestModule(nt.TestModule):
+  def build_microbenchmark(self, options, make_variables):
+    """build benchmark binary in obj dir"""
+    objroot = options['OBJROOT']
+    module = options['MODULENAME']
+
+    rc = subprocess.Popen(
+        ['cmake',
+         '-DARCH={}'.format(make_variables['ARCH']),
+         options['SRCROOT']],
+        cwd=objroot,
+        env=os.environ.update({
+            'CXX': options['CXX'],
+            'CXXFLAGS': options['CXXFLAGS'],
+            'CC': options['CC'],
+            'CFLAGS': options['CFLAGS'],
+            })).wait()
+    if rc != 0:
+      return TestSamples('nts.LNT/{}/compile.status'.format(module), [FAIL])
+
+    rc = subprocess.Popen(
+        ['make', '-j{}'.format(options['BUILD_THREADS'])],
+        cwd=objroot).wait()
+    if rc != 0:
+      return TestSamples('nts.LNT/{}/compile.status'.format(module), [FAIL])
+
+    return None
+
+  def run_microbenchmark(self, options, name):
+    """run benchmark binary and parse output"""
+
+    objroot = options['OBJROOT']
+    module = options['MODULENAME']
+
+    p = subprocess.Popen(
+        ['{}/{}'.format(objroot, name), '--benchmark_format=csv'],
+        cwd=objroot,
+        env=os.environ.update({
+            'XRAY_OPTIONS': 'patch_premain=false xray_naive_log=false'}),
+        stdout=subprocess.PIPE)
+    bm_output = p.communicate()
+    if p.returncode != 0:
+      return TestSamples(
+          'nts.LNT/{}/{}.exec.status'.formt(module, name), [FAIL])
+
+    csv_lines = csv.reader(StringIO.StringIO(bm_output[0]))
+    results = []
+    for line in csv_lines:
+      # the first line of output from the benchmark in csv output mode
+      # should look like "name,iterations,real_time,cpu_time,time_unit..."
+      if line[0] == "name":
+        continue
+      results.append(
+          TestSamples('nts.LNT/{}/{}.{}.exec'.format(module, name, line[0]),
+                      [float(line[3])]))
+    return results