1 /*
   2  * Copyright (c) 2014, 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 "runtime/task.hpp"
  27 #include "runtime/rtmLocking.hpp"
  28 
  29 // One-shot PeriodicTask subclass for enabling RTM locking
  30 uintx RTMLockingCounters::_calculation_flag = 0;
  31 
  32 class RTMLockingCalculationTask : public PeriodicTask {
  33  public:
  34   RTMLockingCalculationTask(size_t interval_time) : PeriodicTask(interval_time){  }
  35 
  36   virtual void task() {
  37     RTMLockingCounters::_calculation_flag = 1;
  38     // Reclaim our storage and disenroll ourself
  39     delete this;
  40   }
  41 };
  42 
  43 void RTMLockingCounters::init() {
  44   if (UseRTMLocking && RTMLockingCalculationDelay > 0) {
  45     RTMLockingCalculationTask* task = new RTMLockingCalculationTask(RTMLockingCalculationDelay);
  46     task->enroll();
  47   } else {
  48     _calculation_flag = 1;
  49   }
  50 }
  51 
  52 //------------------------------print_on-------------------------------
  53 void RTMLockingCounters::print_on(outputStream* st) {
  54   tty->print_cr("# rtm locks total (estimated): " UINTX_FORMAT, _total_count * RTMTotalCountIncrRate);
  55   tty->print_cr("# rtm lock aborts  : " UINTX_FORMAT, _abort_count);
  56   for (int i = 0; i < ABORT_STATUS_LIMIT; i++) {
  57     tty->print_cr("# rtm lock aborts %d: " UINTX_FORMAT, i, _abortX_count[i]);
  58   }
  59 }