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1 /* |
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2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "runtime/arguments.hpp" |
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27 #include "runtime/commandLineFlagConstraintsRuntime.hpp" |
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28 #include "runtime/commandLineFlagRangeList.hpp" |
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29 #include "runtime/globals.hpp" |
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30 #include "runtime/task.hpp" |
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31 #include "utilities/defaultStream.hpp" |
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32 |
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33 Flag::Error ObjectAlignmentInBytesConstraintFunc(intx value, bool verbose) { |
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34 if (!is_power_of_2(value)) { |
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35 CommandLineError::print(verbose, |
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36 "ObjectAlignmentInBytes (" INTX_FORMAT ") must be " |
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37 "power of 2\n", |
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38 value); |
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39 return Flag::VIOLATES_CONSTRAINT; |
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40 } |
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41 // In case page size is very small. |
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42 if (value >= (intx)os::vm_page_size()) { |
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43 CommandLineError::print(verbose, |
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44 "ObjectAlignmentInBytes (" INTX_FORMAT ") must be " |
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45 "less than page size (" INTX_FORMAT ")\n", |
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46 value, (intx)os::vm_page_size()); |
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47 return Flag::VIOLATES_CONSTRAINT; |
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48 } |
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49 return Flag::SUCCESS; |
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50 } |
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51 |
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52 // Need to enforce the padding not to break the existing field alignments. |
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53 // It is sufficient to check against the largest type size. |
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54 Flag::Error ContendedPaddingWidthConstraintFunc(intx value, bool verbose) { |
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55 if ((value % BytesPerLong) != 0) { |
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56 CommandLineError::print(verbose, |
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57 "ContendedPaddingWidth (" INTX_FORMAT ") must be " |
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58 "a multiple of %d\n", |
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59 value, BytesPerLong); |
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60 return Flag::VIOLATES_CONSTRAINT; |
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61 } else { |
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62 return Flag::SUCCESS; |
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63 } |
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64 } |
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65 |
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66 Flag::Error BiasedLockingBulkRebiasThresholdFunc(intx value, bool verbose) { |
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67 if (value > BiasedLockingBulkRevokeThreshold) { |
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68 CommandLineError::print(verbose, |
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69 "BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ") must be " |
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70 "less than or equal to BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ")\n", |
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71 value, BiasedLockingBulkRevokeThreshold); |
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72 return Flag::VIOLATES_CONSTRAINT; |
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73 } else { |
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74 return Flag::SUCCESS; |
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75 } |
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76 } |
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77 |
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78 Flag::Error BiasedLockingStartupDelayFunc(intx value, bool verbose) { |
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79 if ((value % PeriodicTask::interval_gran) != 0) { |
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80 CommandLineError::print(verbose, |
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81 "BiasedLockingStartupDelay (" INTX_FORMAT ") must be " |
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82 "evenly divisible by PeriodicTask::interval_gran (" INTX_FORMAT ")\n", |
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83 value, PeriodicTask::interval_gran); |
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84 return Flag::VIOLATES_CONSTRAINT; |
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85 } else { |
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86 return Flag::SUCCESS; |
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87 } |
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88 } |
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89 |
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90 Flag::Error BiasedLockingBulkRevokeThresholdFunc(intx value, bool verbose) { |
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91 if (value < BiasedLockingBulkRebiasThreshold) { |
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92 CommandLineError::print(verbose, |
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93 "BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ") must be " |
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94 "greater than or equal to BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ")\n", |
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95 value, BiasedLockingBulkRebiasThreshold); |
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96 return Flag::VIOLATES_CONSTRAINT; |
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97 } else if ((double)value/(double)BiasedLockingDecayTime > 0.1) { |
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98 CommandLineError::print(verbose, |
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99 "The ratio of BiasedLockingBulkRevokeThreshold (" INTX_FORMAT ")" |
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100 " to BiasedLockingDecayTime (" INTX_FORMAT ") must be " |
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101 "less than or equal to 0.1\n", |
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102 value, BiasedLockingBulkRebiasThreshold); |
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103 return Flag::VIOLATES_CONSTRAINT; |
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104 } else { |
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105 return Flag::SUCCESS; |
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106 } |
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107 } |
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108 |
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109 Flag::Error BiasedLockingDecayTimeFunc(intx value, bool verbose) { |
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110 if (BiasedLockingBulkRebiasThreshold/(double)value > 0.1) { |
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111 CommandLineError::print(verbose, |
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112 "The ratio of BiasedLockingBulkRebiasThreshold (" INTX_FORMAT ")" |
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113 " to BiasedLockingDecayTime (" INTX_FORMAT ") must be " |
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114 "less than or equal to 0.1\n", |
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115 BiasedLockingBulkRebiasThreshold, value); |
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116 return Flag::VIOLATES_CONSTRAINT; |
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117 } else { |
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118 return Flag::SUCCESS; |
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119 } |
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120 } |
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121 |
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122 Flag::Error PerfDataSamplingIntervalFunc(intx value, bool verbose) { |
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123 if ((value % PeriodicTask::interval_gran != 0)) { |
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124 CommandLineError::print(verbose, |
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125 "PerfDataSamplingInterval (" INTX_FORMAT ") must be " |
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126 "evenly divisible by PeriodicTask::interval_gran (" INTX_FORMAT ")\n", |
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127 value, PeriodicTask::interval_gran); |
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128 return Flag::VIOLATES_CONSTRAINT; |
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129 } else { |
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130 return Flag::SUCCESS; |
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131 } |
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132 } |