1 /*

     2  * Copyright (c) 2015, 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 "runtime/flags/jvmFlagRangeList.hpp"

    27 #include "runtime/globals.hpp"

    28 #include "utilities/globalDefinitions.hpp"

    29 

    30 JVMFlag::Error ParallelGCThreadsConstraintFuncParallel(uint value, bool verbose) {

    31   // Parallel GC passes ParallelGCThreads when creating GrowableArray as 'int' type parameter.

    32   // So can't exceed with "max_jint"

    33 

    34   if (UseParallelGC && (value > (uint)max_jint)) {

    35     CommandLineError::print(verbose,

    36                             "ParallelGCThreads (" UINT32_FORMAT ") must be "

    37                             "less than or equal to " UINT32_FORMAT " for Parallel GC\n",

    38                             value, max_jint);

    39     return JVMFlag::VIOLATES_CONSTRAINT;

    40   }

    41   return JVMFlag::SUCCESS;

    42 }

    43 

    44 JVMFlag::Error InitialTenuringThresholdConstraintFuncParallel(uintx value, bool verbose) {

    45   // InitialTenuringThreshold is only used for ParallelGC.

    46   if (UseParallelGC && (value > MaxTenuringThreshold)) {

    47       CommandLineError::print(verbose,

    48                               "InitialTenuringThreshold (" UINTX_FORMAT ") must be "

    49                               "less than or equal to MaxTenuringThreshold (" UINTX_FORMAT ")\n",

    50                               value, MaxTenuringThreshold);

    51       return JVMFlag::VIOLATES_CONSTRAINT;

    52   }

    53   return JVMFlag::SUCCESS;

    54 }

    55 

    56 JVMFlag::Error MaxTenuringThresholdConstraintFuncParallel(uintx value, bool verbose) {

    57   // As only ParallelGC uses InitialTenuringThreshold,

    58   // we don't need to compare InitialTenuringThreshold with MaxTenuringThreshold.

    59   if (UseParallelGC && (value < InitialTenuringThreshold)) {

    60     CommandLineError::print(verbose,

    61                             "MaxTenuringThreshold (" UINTX_FORMAT ") must be "

    62                             "greater than or equal to InitialTenuringThreshold (" UINTX_FORMAT ")\n",

    63                             value, InitialTenuringThreshold);

    64     return JVMFlag::VIOLATES_CONSTRAINT;

    65   }

    66 

    67   return JVMFlag::SUCCESS;

    68 }