jdk8-mips64-public/hotspot: src/cpu/x86/vm/rtmLocking.cpp@606acabe7b5c

8031320: Use Intel RTM instructions for locks
Summary: Use RTM for inflated locks and stack locks.
Reviewed-by: iveresov, twisti, roland, dcubed

     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  */

    25 #include "precompiled.hpp"

    26 #include "runtime/task.hpp"

    27 #include "runtime/rtmLocking.hpp"

    29 // One-shot PeriodicTask subclass for enabling RTM locking

    30 uintx RTMLockingCounters::_calculation_flag = 0;

    32 class RTMLockingCalculationTask : public PeriodicTask {

    33  public:

    34   RTMLockingCalculationTask(size_t interval_time) : PeriodicTask(interval_time){  }

    36   virtual void task() {

    37     RTMLockingCounters::_calculation_flag = 1;

    38     // Reclaim our storage and disenroll ourself

    39     delete this;

    40   }

    41 };

    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 }

    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 }

Mercurial > jdk8-mips64-public > hotspot / file revision