--- old/src/hotspot/share/gc/shared/overheadChecker.cpp	2018-12-12 17:24:07.025881275 +0800
+++ /dev/null	2018-12-04 18:42:22.096405084 +0800
@@ -1,100 +0,0 @@
-/*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-#include "gc/shared/overheadChecker.hpp"
-#include "gc/shared/softRefPolicy.hpp"
-#include "logging/log.hpp"
-
-OverheadChecker::OverheadChecker() :
-  _gc_overhead_limit_exceeded(false),
-  _print_gc_overhead_limit_would_be_exceeded(false),
-  _gc_overhead_limit_count(0) {
-}
-
-void OverheadChecker::check_gc_overhead_limit(OverheadTester* time_overhead,
-                                              OverheadTester* space_overhead,
-                                              bool is_full_gc,
-                                              GCCause::Cause gc_cause,
-                                              SoftRefPolicy* soft_ref_policy) {
-
-  // Ignore explicit GC's.  Exiting here does not set the flag and
-  // does not reset the count.
-  if (GCCause::is_user_requested_gc(gc_cause) ||
-      GCCause::is_serviceability_requested_gc(gc_cause)) {
-    return;
-  }
-
-  bool print_gc_overhead_limit_would_be_exceeded = false;
-  if (is_full_gc) {
-    if (time_overhead->is_exceeded() && space_overhead->is_exceeded()) {
-      // Collections, on average, are taking too much time, and
-      // we have too little space available after a full gc.
-      // At this point the GC overhead limit is being exceeded.
-      _gc_overhead_limit_count++;
-      if (UseGCOverheadLimit) {
-        if (_gc_overhead_limit_count >=
-            AdaptiveSizePolicyGCTimeLimitThreshold){
-          // All conditions have been met for throwing an out-of-memory
-          set_gc_overhead_limit_exceeded(true);
-          // Avoid consecutive OOM due to the gc time limit by resetting
-          // the counter.
-          reset_gc_overhead_limit_count();
-        } else {
-          // The required consecutive collections which exceed the
-          // GC time limit may or may not have been reached. We
-          // are approaching that condition and so as not to
-          // throw an out-of-memory before all SoftRef's have been
-          // cleared, set _should_clear_all_soft_refs in CollectorPolicy.
-          // The clearing will be done on the next GC.
-          bool near_limit = gc_overhead_limit_near();
-          if (near_limit) {
-            soft_ref_policy->set_should_clear_all_soft_refs(true);
-            log_trace(gc, ergo)("Nearing GC overhead limit, will be clearing all SoftReference");
-          }
-        }
-      }
-      // Set this even when the overhead limit will not
-      // cause an out-of-memory.  Diagnostic message indicating
-      // that the overhead limit is being exceeded is sometimes
-      // printed.
-      print_gc_overhead_limit_would_be_exceeded = true;
-
-    } else {
-      // Did not exceed overhead limits
-      reset_gc_overhead_limit_count();
-    }
-  }
-
-  if (UseGCOverheadLimit) {
-    if (gc_overhead_limit_exceeded()) {
-      log_trace(gc, ergo)("GC is exceeding overhead limit of " UINTX_FORMAT "%%", GCTimeLimit);
-      reset_gc_overhead_limit_count();
-    } else if (print_gc_overhead_limit_would_be_exceeded) {
-      assert(_gc_overhead_limit_count > 0, "Should not be printing");
-      log_trace(gc, ergo)("GC would exceed overhead limit of " UINTX_FORMAT "%% %d consecutive time(s)",
-                          GCTimeLimit, _gc_overhead_limit_count);
-    }
-  }
-}