--- old/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:28:50.683747066 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:28:50.471747073 -0700
@@ -103,7 +103,6 @@
 
 int ObjectMonitor::Knob_SpinLimit    = 5000;    // derived by an external tool -
 
-static int Knob_SpinBase            = 0;       // Floor AKA SpinMin
 static int Knob_CASPenalty          = -1;      // Penalty for failed CAS
 static int Knob_OXPenalty           = -1;      // Penalty for observed _owner change
 static int Knob_SpinSetSucc         = 1;       // spinners set the _succ field
@@ -1846,7 +1845,6 @@
   // hold the duration constant but vary the frequency.
 
   ctr = _SpinDuration;
-  if (ctr < Knob_SpinBase) ctr = Knob_SpinBase;
   if (ctr <= 0) return 0;
 
   if (Knob_SuccRestrict && _succ != NULL) return 0;
@@ -2184,7 +2182,6 @@
 
   if (!os::is_MP()) {
     Knob_SpinLimit = 0;
-    Knob_SpinBase  = 0;
     Knob_PreSpin   = 0;
     Knob_FixedSpin = -1;
   }