1 /*
   2  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "compiler/compilerConfig.hpp"
  27 
  28 #if INCLUDE_RTM_OPT
  29 
  30 #include "memory/allocation.inline.hpp"
  31 #include "runtime/task.hpp"
  32 #include "runtime/rtmLocking.hpp"
  33 
  34 
  35 // One-shot PeriodicTask subclass for enabling RTM locking
  36 uintx RTMLockingCounters::_calculation_flag = 0;
  37 
  38 class RTMLockingCalculationTask : public PeriodicTask {
  39  public:
  40   RTMLockingCalculationTask(size_t interval_time) : PeriodicTask(interval_time){  }
  41 
  42   virtual void task() {
  43     RTMLockingCounters::_calculation_flag = 1;
  44     // Reclaim our storage and disenroll ourself
  45     delete this;
  46   }
  47 };
  48 
  49 void RTMLockingCounters::init() {
  50   if (UseRTMLocking && RTMLockingCalculationDelay > 0) {
  51     RTMLockingCalculationTask* task = new RTMLockingCalculationTask(RTMLockingCalculationDelay);
  52     task->enroll();
  53   } else {
  54     _calculation_flag = 1;
  55   }
  56 }
  57 
  58 //------------------------------print_on-------------------------------
  59 void RTMLockingCounters::print_on(outputStream* st) {
  60   tty->print_cr("# rtm locks total (estimated): " UINTX_FORMAT, _total_count * RTMTotalCountIncrRate);
  61   tty->print_cr("# rtm lock aborts  : " UINTX_FORMAT, _abort_count);
  62   for (int i = 0; i < ABORT_STATUS_LIMIT; i++) {
  63     tty->print_cr("# rtm lock aborts %d: " UINTX_FORMAT, i, _abortX_count[i]);
  64   }
  65 }
  66 
  67 #endif