[LNT] r218056 - Add option to use Perf in nt test

[Yi Kong]

Author: kongyi
Date: Thu Sep 18 10:51:28 2014
New Revision: 218056

URL: http://llvm.org/viewvc/llvm-project?rev=218056&view=rev
Log:
Add option to use Perf in nt test

Modified:
    lnt/trunk/lnt/tests/nt.py

Modified: lnt/trunk/lnt/tests/nt.py
URL: http://llvm.org/viewvc/llvm-project/lnt/trunk/lnt/tests/nt.py?rev=218056&r1=218055&r2=218056&view=diff
==============================================================================
--- lnt/trunk/lnt/tests/nt.py (original)
+++ lnt/trunk/lnt/tests/nt.py Thu Sep 18 10:51:28 2014
@@ -398,6 +398,10 @@ class TestConfiguration(object):
             make_variables['USER_MODE_EMULATION'] = '1'
             make_variables['RUNUNDER'] = self.qemu_user_mode_command
 
+        # Set USE_PERF flag, if specified.
+        if self.use_perf:
+            make_variables['USE_PERF'] = '1'
+
         return make_variables, public_vars
         
 ###
@@ -1241,6 +1245,10 @@ class NTTest(builtintest.BuiltinTest):
         group.add_option("", "--build-threads", dest="build_threads",
                          help="Number of compilation threads",
                          type=int, default=0, metavar="N")
+        group.add_option("", "--use-perf", dest="use_perf",
+                         help=("Use perf to obtain high accuracy timing"
+                             "[%default]"),
+                         type=str, default=None)
 
         group.add_option("", "--remote", dest="remote",
                          help=("Execute remotely, see "