| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import jdk.internal.vm.annotation.Contended; |
| |
| /* |
| * @test |
| * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries on G1, with references in them works. |
| * @requires vm.gc == "null" |
| * @bug 8151499 8153734 |
| * @modules java.base/jdk.internal.vm.annotation |
| * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseParallelGC -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject |
| * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=1M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject |
| * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=2M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject |
| * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=4M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject |
| * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject |
| */ |
| public class TestHumongousReferenceObject { |
| |
| /* |
| Due to 300 fields with 8K @Contended padding around each field, it takes 2.4M bytes per instance. |
| With small G1 regions, it is bound to cross regions. G1 should properly (card) mark the object nevertheless. |
| With 128M heap, it is enough to allocate ~100 of these objects to provoke at least one GC. |
| */ |
| |
| static volatile Object instance; |
| |
| public static void main(String[] args) { |
| for (int c = 0; c < 100; c++) { |
| instance = new TestHumongousReferenceObject(); |
| } |
| } |
| |
| @Contended Integer int_1 = new Integer(1); |
| @Contended Integer int_2 = new Integer(2); |
| @Contended Integer int_3 = new Integer(3); |
| @Contended Integer int_4 = new Integer(4); |
| @Contended Integer int_5 = new Integer(5); |
| @Contended Integer int_6 = new Integer(6); |
| @Contended Integer int_7 = new Integer(7); |
| @Contended Integer int_8 = new Integer(8); |
| @Contended Integer int_9 = new Integer(9); |
| @Contended Integer int_10 = new Integer(10); |
| @Contended Integer int_11 = new Integer(11); |
| @Contended Integer int_12 = new Integer(12); |
| @Contended Integer int_13 = new Integer(13); |
| @Contended Integer int_14 = new Integer(14); |
| @Contended Integer int_15 = new Integer(15); |
| @Contended Integer int_16 = new Integer(16); |
| @Contended Integer int_17 = new Integer(17); |
| @Contended Integer int_18 = new Integer(18); |
| @Contended Integer int_19 = new Integer(19); |
| @Contended Integer int_20 = new Integer(20); |
| @Contended Integer int_21 = new Integer(21); |
| @Contended Integer int_22 = new Integer(22); |
| @Contended Integer int_23 = new Integer(23); |
| @Contended Integer int_24 = new Integer(24); |
| @Contended Integer int_25 = new Integer(25); |
| @Contended Integer int_26 = new Integer(26); |
| @Contended Integer int_27 = new Integer(27); |
| @Contended Integer int_28 = new Integer(28); |
| @Contended Integer int_29 = new Integer(29); |
| @Contended Integer int_30 = new Integer(30); |
| @Contended Integer int_31 = new Integer(31); |
| @Contended Integer int_32 = new Integer(32); |
| @Contended Integer int_33 = new Integer(33); |
| @Contended Integer int_34 = new Integer(34); |
| @Contended Integer int_35 = new Integer(35); |
| @Contended Integer int_36 = new Integer(36); |
| @Contended Integer int_37 = new Integer(37); |
| @Contended Integer int_38 = new Integer(38); |
| @Contended Integer int_39 = new Integer(39); |
| @Contended Integer int_40 = new Integer(40); |
| @Contended Integer int_41 = new Integer(41); |
| @Contended Integer int_42 = new Integer(42); |
| @Contended Integer int_43 = new Integer(43); |
| @Contended Integer int_44 = new Integer(44); |
| @Contended Integer int_45 = new Integer(45); |
| @Contended Integer int_46 = new Integer(46); |
| @Contended Integer int_47 = new Integer(47); |
| @Contended Integer int_48 = new Integer(48); |
| @Contended Integer int_49 = new Integer(49); |
| @Contended Integer int_50 = new Integer(50); |
| @Contended Integer int_51 = new Integer(51); |
| @Contended Integer int_52 = new Integer(52); |
| @Contended Integer int_53 = new Integer(53); |
| @Contended Integer int_54 = new Integer(54); |
| @Contended Integer int_55 = new Integer(55); |
| @Contended Integer int_56 = new Integer(56); |
| @Contended Integer int_57 = new Integer(57); |
| @Contended Integer int_58 = new Integer(58); |
| @Contended Integer int_59 = new Integer(59); |
| @Contended Integer int_60 = new Integer(60); |
| @Contended Integer int_61 = new Integer(61); |
| @Contended Integer int_62 = new Integer(62); |
| @Contended Integer int_63 = new Integer(63); |
| @Contended Integer int_64 = new Integer(64); |
| @Contended Integer int_65 = new Integer(65); |
| @Contended Integer int_66 = new Integer(66); |
| @Contended Integer int_67 = new Integer(67); |
| @Contended Integer int_68 = new Integer(68); |
| @Contended Integer int_69 = new Integer(69); |
| @Contended Integer int_70 = new Integer(70); |
| @Contended Integer int_71 = new Integer(71); |
| @Contended Integer int_72 = new Integer(72); |
| @Contended Integer int_73 = new Integer(73); |
| @Contended Integer int_74 = new Integer(74); |
| @Contended Integer int_75 = new Integer(75); |
| @Contended Integer int_76 = new Integer(76); |
| @Contended Integer int_77 = new Integer(77); |
| @Contended Integer int_78 = new Integer(78); |
| @Contended Integer int_79 = new Integer(79); |
| @Contended Integer int_80 = new Integer(80); |
| @Contended Integer int_81 = new Integer(81); |
| @Contended Integer int_82 = new Integer(82); |
| @Contended Integer int_83 = new Integer(83); |
| @Contended Integer int_84 = new Integer(84); |
| @Contended Integer int_85 = new Integer(85); |
| @Contended Integer int_86 = new Integer(86); |
| @Contended Integer int_87 = new Integer(87); |
| @Contended Integer int_88 = new Integer(88); |
| @Contended Integer int_89 = new Integer(89); |
| @Contended Integer int_90 = new Integer(90); |
| @Contended Integer int_91 = new Integer(91); |
| @Contended Integer int_92 = new Integer(92); |
| @Contended Integer int_93 = new Integer(93); |
| @Contended Integer int_94 = new Integer(94); |
| @Contended Integer int_95 = new Integer(95); |
| @Contended Integer int_96 = new Integer(96); |
| @Contended Integer int_97 = new Integer(97); |
| @Contended Integer int_98 = new Integer(98); |
| @Contended Integer int_99 = new Integer(99); |
| @Contended Integer int_100 = new Integer(100); |
| @Contended Integer int_101 = new Integer(101); |
| @Contended Integer int_102 = new Integer(102); |
| @Contended Integer int_103 = new Integer(103); |
| @Contended Integer int_104 = new Integer(104); |
| @Contended Integer int_105 = new Integer(105); |
| @Contended Integer int_106 = new Integer(106); |
| @Contended Integer int_107 = new Integer(107); |
| @Contended Integer int_108 = new Integer(108); |
| @Contended Integer int_109 = new Integer(109); |
| @Contended Integer int_110 = new Integer(110); |
| @Contended Integer int_111 = new Integer(111); |
| @Contended Integer int_112 = new Integer(112); |
| @Contended Integer int_113 = new Integer(113); |
| @Contended Integer int_114 = new Integer(114); |
| @Contended Integer int_115 = new Integer(115); |
| @Contended Integer int_116 = new Integer(116); |
| @Contended Integer int_117 = new Integer(117); |
| @Contended Integer int_118 = new Integer(118); |
| @Contended Integer int_119 = new Integer(119); |
| @Contended Integer int_120 = new Integer(120); |
| @Contended Integer int_121 = new Integer(121); |
| @Contended Integer int_122 = new Integer(122); |
| @Contended Integer int_123 = new Integer(123); |
| @Contended Integer int_124 = new Integer(124); |
| @Contended Integer int_125 = new Integer(125); |
| @Contended Integer int_126 = new Integer(126); |
| @Contended Integer int_127 = new Integer(127); |
| @Contended Integer int_128 = new Integer(128); |
| @Contended Integer int_129 = new Integer(129); |
| @Contended Integer int_130 = new Integer(130); |
| @Contended Integer int_131 = new Integer(131); |
| @Contended Integer int_132 = new Integer(132); |
| @Contended Integer int_133 = new Integer(133); |
| @Contended Integer int_134 = new Integer(134); |
| @Contended Integer int_135 = new Integer(135); |
| @Contended Integer int_136 = new Integer(136); |
| @Contended Integer int_137 = new Integer(137); |
| @Contended Integer int_138 = new Integer(138); |
| @Contended Integer int_139 = new Integer(139); |
| @Contended Integer int_140 = new Integer(140); |
| @Contended Integer int_141 = new Integer(141); |
| @Contended Integer int_142 = new Integer(142); |
| @Contended Integer int_143 = new Integer(143); |
| @Contended Integer int_144 = new Integer(144); |
| @Contended Integer int_145 = new Integer(145); |
| @Contended Integer int_146 = new Integer(146); |
| @Contended Integer int_147 = new Integer(147); |
| @Contended Integer int_148 = new Integer(148); |
| @Contended Integer int_149 = new Integer(149); |
| @Contended Integer int_150 = new Integer(150); |
| @Contended Integer int_151 = new Integer(151); |
| @Contended Integer int_152 = new Integer(152); |
| @Contended Integer int_153 = new Integer(153); |
| @Contended Integer int_154 = new Integer(154); |
| @Contended Integer int_155 = new Integer(155); |
| @Contended Integer int_156 = new Integer(156); |
| @Contended Integer int_157 = new Integer(157); |
| @Contended Integer int_158 = new Integer(158); |
| @Contended Integer int_159 = new Integer(159); |
| @Contended Integer int_160 = new Integer(160); |
| @Contended Integer int_161 = new Integer(161); |
| @Contended Integer int_162 = new Integer(162); |
| @Contended Integer int_163 = new Integer(163); |
| @Contended Integer int_164 = new Integer(164); |
| @Contended Integer int_165 = new Integer(165); |
| @Contended Integer int_166 = new Integer(166); |
| @Contended Integer int_167 = new Integer(167); |
| @Contended Integer int_168 = new Integer(168); |
| @Contended Integer int_169 = new Integer(169); |
| @Contended Integer int_170 = new Integer(170); |
| @Contended Integer int_171 = new Integer(171); |
| @Contended Integer int_172 = new Integer(172); |
| @Contended Integer int_173 = new Integer(173); |
| @Contended Integer int_174 = new Integer(174); |
| @Contended Integer int_175 = new Integer(175); |
| @Contended Integer int_176 = new Integer(176); |
| @Contended Integer int_177 = new Integer(177); |
| @Contended Integer int_178 = new Integer(178); |
| @Contended Integer int_179 = new Integer(179); |
| @Contended Integer int_180 = new Integer(180); |
| @Contended Integer int_181 = new Integer(181); |
| @Contended Integer int_182 = new Integer(182); |
| @Contended Integer int_183 = new Integer(183); |
| @Contended Integer int_184 = new Integer(184); |
| @Contended Integer int_185 = new Integer(185); |
| @Contended Integer int_186 = new Integer(186); |
| @Contended Integer int_187 = new Integer(187); |
| @Contended Integer int_188 = new Integer(188); |
| @Contended Integer int_189 = new Integer(189); |
| @Contended Integer int_190 = new Integer(190); |
| @Contended Integer int_191 = new Integer(191); |
| @Contended Integer int_192 = new Integer(192); |
| @Contended Integer int_193 = new Integer(193); |
| @Contended Integer int_194 = new Integer(194); |
| @Contended Integer int_195 = new Integer(195); |
| @Contended Integer int_196 = new Integer(196); |
| @Contended Integer int_197 = new Integer(197); |
| @Contended Integer int_198 = new Integer(198); |
| @Contended Integer int_199 = new Integer(199); |
| @Contended Integer int_200 = new Integer(200); |
| @Contended Integer int_201 = new Integer(201); |
| @Contended Integer int_202 = new Integer(202); |
| @Contended Integer int_203 = new Integer(203); |
| @Contended Integer int_204 = new Integer(204); |
| @Contended Integer int_205 = new Integer(205); |
| @Contended Integer int_206 = new Integer(206); |
| @Contended Integer int_207 = new Integer(207); |
| @Contended Integer int_208 = new Integer(208); |
| @Contended Integer int_209 = new Integer(209); |
| @Contended Integer int_210 = new Integer(210); |
| @Contended Integer int_211 = new Integer(211); |
| @Contended Integer int_212 = new Integer(212); |
| @Contended Integer int_213 = new Integer(213); |
| @Contended Integer int_214 = new Integer(214); |
| @Contended Integer int_215 = new Integer(215); |
| @Contended Integer int_216 = new Integer(216); |
| @Contended Integer int_217 = new Integer(217); |
| @Contended Integer int_218 = new Integer(218); |
| @Contended Integer int_219 = new Integer(219); |
| @Contended Integer int_220 = new Integer(220); |
| @Contended Integer int_221 = new Integer(221); |
| @Contended Integer int_222 = new Integer(222); |
| @Contended Integer int_223 = new Integer(223); |
| @Contended Integer int_224 = new Integer(224); |
| @Contended Integer int_225 = new Integer(225); |
| @Contended Integer int_226 = new Integer(226); |
| @Contended Integer int_227 = new Integer(227); |
| @Contended Integer int_228 = new Integer(228); |
| @Contended Integer int_229 = new Integer(229); |
| @Contended Integer int_230 = new Integer(230); |
| @Contended Integer int_231 = new Integer(231); |
| @Contended Integer int_232 = new Integer(232); |
| @Contended Integer int_233 = new Integer(233); |
| @Contended Integer int_234 = new Integer(234); |
| @Contended Integer int_235 = new Integer(235); |
| @Contended Integer int_236 = new Integer(236); |
| @Contended Integer int_237 = new Integer(237); |
| @Contended Integer int_238 = new Integer(238); |
| @Contended Integer int_239 = new Integer(239); |
| @Contended Integer int_240 = new Integer(240); |
| @Contended Integer int_241 = new Integer(241); |
| @Contended Integer int_242 = new Integer(242); |
| @Contended Integer int_243 = new Integer(243); |
| @Contended Integer int_244 = new Integer(244); |
| @Contended Integer int_245 = new Integer(245); |
| @Contended Integer int_246 = new Integer(246); |
| @Contended Integer int_247 = new Integer(247); |
| @Contended Integer int_248 = new Integer(248); |
| @Contended Integer int_249 = new Integer(249); |
| @Contended Integer int_250 = new Integer(250); |
| @Contended Integer int_251 = new Integer(251); |
| @Contended Integer int_252 = new Integer(252); |
| @Contended Integer int_253 = new Integer(253); |
| @Contended Integer int_254 = new Integer(254); |
| @Contended Integer int_255 = new Integer(255); |
| @Contended Integer int_256 = new Integer(256); |
| @Contended Integer int_257 = new Integer(257); |
| @Contended Integer int_258 = new Integer(258); |
| @Contended Integer int_259 = new Integer(259); |
| @Contended Integer int_260 = new Integer(260); |
| @Contended Integer int_261 = new Integer(261); |
| @Contended Integer int_262 = new Integer(262); |
| @Contended Integer int_263 = new Integer(263); |
| @Contended Integer int_264 = new Integer(264); |
| @Contended Integer int_265 = new Integer(265); |
| @Contended Integer int_266 = new Integer(266); |
| @Contended Integer int_267 = new Integer(267); |
| @Contended Integer int_268 = new Integer(268); |
| @Contended Integer int_269 = new Integer(269); |
| @Contended Integer int_270 = new Integer(270); |
| @Contended Integer int_271 = new Integer(271); |
| @Contended Integer int_272 = new Integer(272); |
| @Contended Integer int_273 = new Integer(273); |
| @Contended Integer int_274 = new Integer(274); |
| @Contended Integer int_275 = new Integer(275); |
| @Contended Integer int_276 = new Integer(276); |
| @Contended Integer int_277 = new Integer(277); |
| @Contended Integer int_278 = new Integer(278); |
| @Contended Integer int_279 = new Integer(279); |
| @Contended Integer int_280 = new Integer(280); |
| @Contended Integer int_281 = new Integer(281); |
| @Contended Integer int_282 = new Integer(282); |
| @Contended Integer int_283 = new Integer(283); |
| @Contended Integer int_284 = new Integer(284); |
| @Contended Integer int_285 = new Integer(285); |
| @Contended Integer int_286 = new Integer(286); |
| @Contended Integer int_287 = new Integer(287); |
| @Contended Integer int_288 = new Integer(288); |
| @Contended Integer int_289 = new Integer(289); |
| @Contended Integer int_290 = new Integer(290); |
| @Contended Integer int_291 = new Integer(291); |
| @Contended Integer int_292 = new Integer(292); |
| @Contended Integer int_293 = new Integer(293); |
| @Contended Integer int_294 = new Integer(294); |
| @Contended Integer int_295 = new Integer(295); |
| @Contended Integer int_296 = new Integer(296); |
| @Contended Integer int_297 = new Integer(297); |
| @Contended Integer int_298 = new Integer(298); |
| @Contended Integer int_299 = new Integer(299); |
| @Contended Integer int_300 = new Integer(300); |
| } |