*** old/src/share/vm/runtime/arguments.cpp	Tue Feb  4 16:00:32 2014
--- new/src/share/vm/runtime/arguments.cpp	Tue Feb  4 16:00:31 2014

*** 1126,1135 ****
--- 1126,1144 ----
    }
    if (CompilationPolicyChoice < 2) {
      vm_exit_during_initialization(
        "Incompatible compilation policy selected", NULL);
    }
+   if (FLAG_IS_DEFAULT(CodeCacheSegmentSize) && FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
+     // There is enough code cache available. Increasing CodeCacheSegmentSize results
+     // in less memory fragmentation (and therefore a shorter freelist in the code heap.)
+     // Testing shows a reduction of the freelist length by several factors compared to
+     // using the default CodeCacheSegmentSize. A larger CodeCacheSegmentSize increases
+     // the memory consumption (due to possibly unused memory at the end of an nmethod)
+     // by a couple of percent only.
+     FLAG_SET_DEFAULT(CodeCacheSegmentSize, CodeCacheSegmentSize * 2);
+   }
    // Increase the code cache size - tiered compiles a lot more.
    if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
      FLAG_SET_DEFAULT(ReservedCodeCacheSize, ReservedCodeCacheSize * 5);
    }
    if (!UseInterpreter) { // -Xcomp

*** 2340,2349 ****
--- 2349,2360 ----
      status = false;
    }
  
    status &= verify_interval(NmethodSweepFraction, 1, ReservedCodeCacheSize/K, "NmethodSweepFraction");
    status &= verify_interval(NmethodSweepActivity, 0, 2000, "NmethodSweepActivity");
+   status &= verify_interval(CodeCacheMinBlockLength, 1, 100, "CodeCacheMinBlockLength");
+   status &= verify_interval(CodeCacheSegmentSize, 1, 1024, "CodeCacheSegmentSize");
  
    return status;
  }
  
  bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,