1 /* 2 * Copyright (c) 2016, 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 #include "precompiled.hpp" 25 #include "gc/shared/collectorPolicy.hpp" 26 #include "runtime/arguments.hpp" 27 #include "runtime/globals_extension.hpp" 28 #include "utilities/globalDefinitions.hpp" 29 #include "utilities/macros.hpp" 30 #include "unittest.hpp" 31 32 class TestGenCollectorPolicy { 33 public: 34 35 class Executor { 36 public: 37 virtual void execute() = 0; 38 }; 39 40 class UnaryExecutor : public Executor { 41 protected: 42 const size_t param; 43 public: 44 UnaryExecutor(size_t val) : param(val) { } 45 }; 46 47 class BinaryExecutor : public Executor { 48 protected: 49 const size_t param1; 50 const size_t param2; 51 public: 52 BinaryExecutor(size_t val1, size_t val2) : param1(val1), param2(val2) { } 53 }; 54 55 class MinHeapSizeGuard { 56 private: 57 const size_t _stored_min_heap_size; 58 public: 59 MinHeapSizeGuard() : _stored_min_heap_size(Arguments::min_heap_size()) { } 60 ~MinHeapSizeGuard() { 61 Arguments::set_min_heap_size(_stored_min_heap_size); 62 } 63 }; 64 65 class TestWrapper { 66 public: 67 static void test(Executor* setter1, Executor* setter2, Executor* checker) { 68 FLAG_GUARD(InitialHeapSize); 69 FLAG_GUARD(MaxHeapSize); 70 FLAG_GUARD(MaxNewSize); 71 FLAG_GUARD(MinHeapDeltaBytes); 72 FLAG_GUARD(NewSize); 73 FLAG_GUARD(OldSize); 74 MinHeapSizeGuard min_heap_size_guard; 75 76 FLAG_SET_ERGO(size_t, InitialHeapSize, 100 * M); 77 FLAG_SET_ERGO(size_t, OldSize, 4 * M); 78 FLAG_SET_ERGO(size_t, NewSize, 1 * M); 79 FLAG_SET_ERGO(size_t, MaxNewSize, 80 * M); 80 Arguments::set_min_heap_size(40 * M); 81 82 ASSERT_NO_FATAL_FAILURE(setter1->execute()); 83 84 if (setter2 != NULL) { 85 ASSERT_NO_FATAL_FAILURE(setter2->execute()); 86 } 87 88 ASSERT_NO_FATAL_FAILURE(checker->execute()); 89 } 90 static void test(Executor* setter, Executor* checker) { 91 test(setter, NULL, checker); 92 } 93 }; 94 95 class SetNewSizeErgo : public UnaryExecutor { 96 public: 97 SetNewSizeErgo(size_t param) : UnaryExecutor(param) { } 98 void execute() { 99 FLAG_SET_ERGO(size_t, NewSize, param); 100 } 101 }; 102 103 class CheckYoungMin : public UnaryExecutor { 104 public: 105 CheckYoungMin(size_t param) : UnaryExecutor(param) { } 106 void execute() { 107 MarkSweepPolicy msp; 108 msp.initialize_all(); 109 ASSERT_LE(msp.min_young_size(), param); 110 } 111 }; 112 113 class CheckScaledYoungInitial : public Executor { 114 public: 115 void execute() { 116 size_t initial_heap_size = InitialHeapSize; 117 MarkSweepPolicy msp; 118 msp.initialize_all(); 119 120 if (InitialHeapSize > initial_heap_size) { 121 // InitialHeapSize was adapted by msp.initialize_all, e.g. due to alignment 122 // caused by 64K page size. 123 initial_heap_size = InitialHeapSize; 124 } 125 126 size_t expected = msp.scale_by_NewRatio_aligned(initial_heap_size); 127 ASSERT_EQ(expected, msp.initial_young_size()); 128 ASSERT_EQ(expected, NewSize); 129 } 130 }; 131 132 class SetNewSizeCmd : public UnaryExecutor { 133 public: 134 SetNewSizeCmd(size_t param) : UnaryExecutor(param) { } 135 void execute() { 136 FLAG_SET_CMDLINE(size_t, NewSize, param); 137 } 138 }; 139 140 class CheckYoungInitial : public UnaryExecutor { 141 public: 142 CheckYoungInitial(size_t param) : UnaryExecutor(param) { } 143 void execute() { 144 MarkSweepPolicy msp; 145 msp.initialize_all(); 146 147 ASSERT_EQ(param, msp.initial_young_size()); 148 } 149 }; 150 151 class SetOldSizeCmd : public UnaryExecutor { 152 public: 153 SetOldSizeCmd(size_t param) : UnaryExecutor(param) { } 154 void execute() { 155 FLAG_SET_CMDLINE(size_t, OldSize, param); 156 } 157 }; 158 159 class SetMaxNewSizeCmd : public BinaryExecutor { 160 public: 161 SetMaxNewSizeCmd(size_t param1, size_t param2) : BinaryExecutor(param1, param2) { } 162 void execute() { 163 size_t heap_alignment = CollectorPolicy::compute_heap_alignment(); 164 size_t new_size_value = align_up(MaxHeapSize, heap_alignment) 165 - param1 + param2; 166 FLAG_SET_CMDLINE(size_t, MaxNewSize, new_size_value); 167 } 168 }; 169 170 class CheckOldMin : public UnaryExecutor { 171 public: 172 CheckOldMin(size_t param) : UnaryExecutor(param) { } 173 void execute() { 174 MarkSweepPolicy msp; 175 msp.initialize_all(); 176 ASSERT_LE(msp.min_old_size(), param); 177 } 178 }; 179 180 class CheckOldInitial : public Executor { 181 public: 182 void execute() { 183 size_t heap_alignment = CollectorPolicy::compute_heap_alignment(); 184 185 MarkSweepPolicy msp; 186 msp.initialize_all(); 187 188 size_t expected_old_initial = align_up(InitialHeapSize, heap_alignment) 189 - MaxNewSize; 190 191 ASSERT_EQ(expected_old_initial, msp.initial_old_size()); 192 } 193 }; 194 195 class CheckOldInitialMaxNewSize : public BinaryExecutor { 196 public: 197 CheckOldInitialMaxNewSize(size_t param1, size_t param2) : BinaryExecutor(param1, param2) { } 198 void execute() { 199 size_t heap_alignment = CollectorPolicy::compute_heap_alignment(); 200 size_t new_size_value = align_up(MaxHeapSize, heap_alignment) 201 - param1 + param2; 202 203 MarkSweepPolicy msp; 204 msp.initialize_all(); 205 206 size_t expected_old_initial = align_up(MaxHeapSize, heap_alignment) 207 - new_size_value; 208 209 ASSERT_EQ(expected_old_initial, msp.initial_old_size()); 210 } 211 }; 212 }; 213 214 215 // Testing that the NewSize flag is handled correct is hard because it 216 // depends on so many other configurable variables. These tests only try to 217 // verify that there are some basic rules for NewSize honored by the policies. 218 219 // If NewSize has been ergonomically set, the collector policy 220 // should use it for min 221 TEST_VM(CollectorPolicy, young_min_ergo) { 222 TestGenCollectorPolicy::SetNewSizeErgo setter(20 * M); 223 TestGenCollectorPolicy::CheckYoungMin checker(20 * M); 224 225 TestGenCollectorPolicy::TestWrapper::test(&setter, &checker); 226 } 227 228 // If NewSize has been ergonomically set, the collector policy 229 // should use it for min but calculate the initial young size 230 // using NewRatio. 231 TEST_VM(CollectorPolicy, young_scaled_initial_ergo) { 232 TestGenCollectorPolicy::SetNewSizeErgo setter(20 * M); 233 TestGenCollectorPolicy::CheckScaledYoungInitial checker; 234 235 TestGenCollectorPolicy::TestWrapper::test(&setter, &checker); 236 } 237 238 239 // Since a flag has been set with FLAG_SET_CMDLINE it 240 // will be treated as it have been set on the command line for 241 // the rest of the VM lifetime. This is an irreversible change and 242 // could impact other tests so we use TEST_OTHER_VM 243 TEST_OTHER_VM(CollectorPolicy, young_cmd) { 244 // If NewSize is set on the command line, it should be used 245 // for both min and initial young size if less than min heap. 246 TestGenCollectorPolicy::SetNewSizeCmd setter(20 * M); 247 248 TestGenCollectorPolicy::CheckYoungMin checker_min(20 * M); 249 TestGenCollectorPolicy::TestWrapper::test(&setter, &checker_min); 250 251 TestGenCollectorPolicy::CheckYoungInitial checker_initial(20 * M); 252 TestGenCollectorPolicy::TestWrapper::test(&setter, &checker_initial); 253 254 // If NewSize is set on command line, but is larger than the min 255 // heap size, it should only be used for initial young size. 256 TestGenCollectorPolicy::SetNewSizeCmd setter_large(80 * M); 257 TestGenCollectorPolicy::CheckYoungInitial checker_large(80 * M); 258 TestGenCollectorPolicy::TestWrapper::test(&setter_large, &checker_large); 259 } 260 261 // Since a flag has been set with FLAG_SET_CMDLINE it 262 // will be treated as it have been set on the command line for 263 // the rest of the VM lifetime. This is an irreversible change and 264 // could impact other tests so we use TEST_OTHER_VM 265 TEST_OTHER_VM(CollectorPolicy, old_cmd) { 266 // If OldSize is set on the command line, it should be used 267 // for both min and initial old size if less than min heap. 268 TestGenCollectorPolicy::SetOldSizeCmd setter(20 * M); 269 270 TestGenCollectorPolicy::CheckOldMin checker_min(20 * M); 271 TestGenCollectorPolicy::TestWrapper::test(&setter, &checker_min); 272 273 TestGenCollectorPolicy::CheckOldInitial checker_initial; 274 TestGenCollectorPolicy::TestWrapper::test(&setter, &checker_initial); 275 276 // If MaxNewSize is large, the maximum OldSize will be less than 277 // what's requested on the command line and it should be reset 278 // ergonomically. 279 // We intentionally set MaxNewSize + OldSize > MaxHeapSize 280 TestGenCollectorPolicy::SetOldSizeCmd setter_old_size(30 * M); 281 TestGenCollectorPolicy::SetMaxNewSizeCmd setter_max_new_size(30 * M, 20 * M); 282 TestGenCollectorPolicy::CheckOldInitialMaxNewSize checker_large(30 * M, 20 * M); 283 284 TestGenCollectorPolicy::TestWrapper::test(&setter_old_size, &setter_max_new_size, &checker_large); 285 }