diff --git a/tools/run_perf.py b/tools/run_perf.py
index 544823d36c..1e22b298a8 100644
--- a/tools/run_perf.py
+++ b/tools/run_perf.py
@@ -459,7 +459,9 @@ class RunnableConfig(GraphConfig):
     """
     suite_dir = os.path.abspath(os.path.dirname(suite_path))
     bench_dir = os.path.normpath(os.path.join(*self.path))
-    os.chdir(os.path.join(suite_dir, bench_dir))
+    cwd = os.path.join(suite_dir, bench_dir)
+    logging.debug('Changing CWD to: %s' % cwd)
+    os.chdir(cwd)
 
   def GetCommandFlags(self, extra_flags=None):
     suffix = ['--'] + self.test_flags if self.test_flags else []