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annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" | |
| 27 #include "gc_implementation/shared/gcStats.hpp" | |
| 28 #include "memory/defNewGeneration.hpp" | |
| 29 #include "memory/genCollectedHeap.hpp" | |
| 30 #include "runtime/thread.hpp" | |
| 31 #ifdef TARGET_OS_FAMILY_linux | |
| 32 # include "os_linux.inline.hpp" | |
| 33 #endif | |
| 34 #ifdef TARGET_OS_FAMILY_solaris | |
| 35 # include "os_solaris.inline.hpp" | |
| 36 #endif | |
| 37 #ifdef TARGET_OS_FAMILY_windows | |
| 38 # include "os_windows.inline.hpp" | |
| 39 #endif | |
| 0 | 40 elapsedTimer CMSAdaptiveSizePolicy::_concurrent_timer; |
| 41 elapsedTimer CMSAdaptiveSizePolicy::_STW_timer; | |
| 42 | |
| 43 // Defined if the granularity of the time measurements is potentially too large. | |
| 44 #define CLOCK_GRANULARITY_TOO_LARGE | |
| 45 | |
| 46 CMSAdaptiveSizePolicy::CMSAdaptiveSizePolicy(size_t init_eden_size, | |
| 47 size_t init_promo_size, | |
| 48 size_t init_survivor_size, | |
| 49 double max_gc_minor_pause_sec, | |
| 50 double max_gc_pause_sec, | |
| 51 uint gc_cost_ratio) : | |
| 52 AdaptiveSizePolicy(init_eden_size, | |
| 53 init_promo_size, | |
| 54 init_survivor_size, | |
| 55 max_gc_pause_sec, | |
| 56 gc_cost_ratio) { | |
| 57 | |
| 58 clear_internal_time_intervals(); | |
| 59 | |
| 60 _processor_count = os::active_processor_count(); | |
| 61 | |
| 1284 | 62 if (CMSConcurrentMTEnabled && (ConcGCThreads > 1)) { |
| 0 | 63 assert(_processor_count > 0, "Processor count is suspect"); |
| 1284 | 64 _concurrent_processor_count = MIN2((uint) ConcGCThreads, |
| 0 | 65 (uint) _processor_count); |
| 66 } else { | |
| 67 _concurrent_processor_count = 1; | |
| 68 } | |
| 69 | |
| 70 _avg_concurrent_time = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 71 _avg_concurrent_interval = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 72 _avg_concurrent_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 73 | |
| 74 _avg_initial_pause = new AdaptivePaddedAverage(AdaptiveTimeWeight, | |
| 75 PausePadding); | |
| 76 _avg_remark_pause = new AdaptivePaddedAverage(AdaptiveTimeWeight, | |
| 77 PausePadding); | |
| 78 | |
| 79 _avg_cms_STW_time = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 80 _avg_cms_STW_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 81 | |
| 82 _avg_cms_free = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 83 _avg_cms_free_at_sweep = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 84 _avg_cms_promo = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 85 | |
| 86 // Mark-sweep-compact | |
| 87 _avg_msc_pause = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 88 _avg_msc_interval = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 89 _avg_msc_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 90 | |
| 91 // Mark-sweep | |
| 92 _avg_ms_pause = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 93 _avg_ms_interval = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 94 _avg_ms_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 95 | |
| 96 // Variables that estimate pause times as a function of generation | |
| 97 // size. | |
| 98 _remark_pause_old_estimator = | |
| 99 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 100 _initial_pause_old_estimator = | |
| 101 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 102 _remark_pause_young_estimator = | |
| 103 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 104 _initial_pause_young_estimator = | |
| 105 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 106 | |
| 107 // Alignment comes from that used in ReservedSpace. | |
| 108 _generation_alignment = os::vm_allocation_granularity(); | |
| 109 | |
| 110 // Start the concurrent timer here so that the first | |
| 111 // concurrent_phases_begin() measures a finite mutator | |
| 112 // time. A finite mutator time is used to determine | |
| 113 // if a concurrent collection has been started. If this | |
| 114 // proves to be a problem, use some explicit flag to | |
| 115 // signal that a concurrent collection has been started. | |
| 116 _concurrent_timer.start(); | |
| 117 _STW_timer.start(); | |
| 118 } | |
| 119 | |
| 120 double CMSAdaptiveSizePolicy::concurrent_processor_fraction() { | |
| 121 // For now assume no other daemon threads are taking alway | |
| 122 // cpu's from the application. | |
| 123 return ((double) _concurrent_processor_count / (double) _processor_count); | |
| 124 } | |
| 125 | |
| 126 double CMSAdaptiveSizePolicy::concurrent_collection_cost( | |
| 127 double interval_in_seconds) { | |
| 128 // When the precleaning and sweeping phases use multiple | |
| 129 // threads, change one_processor_fraction to | |
| 130 // concurrent_processor_fraction(). | |
| 131 double one_processor_fraction = 1.0 / ((double) processor_count()); | |
| 132 double concurrent_cost = | |
| 133 collection_cost(_latest_cms_concurrent_marking_time_secs, | |
| 134 interval_in_seconds) * concurrent_processor_fraction() + | |
| 135 collection_cost(_latest_cms_concurrent_precleaning_time_secs, | |
| 136 interval_in_seconds) * one_processor_fraction + | |
| 137 collection_cost(_latest_cms_concurrent_sweeping_time_secs, | |
| 138 interval_in_seconds) * one_processor_fraction; | |
| 139 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 140 gclog_or_tty->print_cr( | |
| 141 "\nCMSAdaptiveSizePolicy::scaled_concurrent_collection_cost(%f) " | |
| 142 "_latest_cms_concurrent_marking_cost %f " | |
| 143 "_latest_cms_concurrent_precleaning_cost %f " | |
| 144 "_latest_cms_concurrent_sweeping_cost %f " | |
| 145 "concurrent_processor_fraction %f " | |
| 146 "concurrent_cost %f ", | |
| 147 interval_in_seconds, | |
| 148 collection_cost(_latest_cms_concurrent_marking_time_secs, | |
| 149 interval_in_seconds), | |
| 150 collection_cost(_latest_cms_concurrent_precleaning_time_secs, | |
| 151 interval_in_seconds), | |
| 152 collection_cost(_latest_cms_concurrent_sweeping_time_secs, | |
| 153 interval_in_seconds), | |
| 154 concurrent_processor_fraction(), | |
| 155 concurrent_cost); | |
| 156 } | |
| 157 return concurrent_cost; | |
| 158 } | |
| 159 | |
| 160 double CMSAdaptiveSizePolicy::concurrent_collection_time() { | |
| 161 double latest_cms_sum_concurrent_phases_time_secs = | |
| 162 _latest_cms_concurrent_marking_time_secs + | |
| 163 _latest_cms_concurrent_precleaning_time_secs + | |
| 164 _latest_cms_concurrent_sweeping_time_secs; | |
| 165 return latest_cms_sum_concurrent_phases_time_secs; | |
| 166 } | |
| 167 | |
| 168 double CMSAdaptiveSizePolicy::scaled_concurrent_collection_time() { | |
| 169 // When the precleaning and sweeping phases use multiple | |
| 170 // threads, change one_processor_fraction to | |
| 171 // concurrent_processor_fraction(). | |
| 172 double one_processor_fraction = 1.0 / ((double) processor_count()); | |
| 173 double latest_cms_sum_concurrent_phases_time_secs = | |
| 174 _latest_cms_concurrent_marking_time_secs * concurrent_processor_fraction() + | |
| 175 _latest_cms_concurrent_precleaning_time_secs * one_processor_fraction + | |
| 176 _latest_cms_concurrent_sweeping_time_secs * one_processor_fraction ; | |
| 177 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 178 gclog_or_tty->print_cr( | |
| 179 "\nCMSAdaptiveSizePolicy::scaled_concurrent_collection_time " | |
| 180 "_latest_cms_concurrent_marking_time_secs %f " | |
| 181 "_latest_cms_concurrent_precleaning_time_secs %f " | |
| 182 "_latest_cms_concurrent_sweeping_time_secs %f " | |
| 183 "concurrent_processor_fraction %f " | |
| 184 "latest_cms_sum_concurrent_phases_time_secs %f ", | |
| 185 _latest_cms_concurrent_marking_time_secs, | |
| 186 _latest_cms_concurrent_precleaning_time_secs, | |
| 187 _latest_cms_concurrent_sweeping_time_secs, | |
| 188 concurrent_processor_fraction(), | |
| 189 latest_cms_sum_concurrent_phases_time_secs); | |
| 190 } | |
| 191 return latest_cms_sum_concurrent_phases_time_secs; | |
| 192 } | |
| 193 | |
| 194 void CMSAdaptiveSizePolicy::update_minor_pause_old_estimator( | |
| 195 double minor_pause_in_ms) { | |
| 196 // Get the equivalent of the free space | |
| 197 // that is available for promotions in the CMS generation | |
| 198 // and use that to update _minor_pause_old_estimator | |
| 199 | |
| 200 // Don't implement this until it is needed. A warning is | |
| 201 // printed if _minor_pause_old_estimator is used. | |
| 202 } | |
| 203 | |
| 204 void CMSAdaptiveSizePolicy::concurrent_marking_begin() { | |
| 205 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 206 gclog_or_tty->print(" "); | |
| 207 gclog_or_tty->stamp(); | |
| 208 gclog_or_tty->print(": concurrent_marking_begin "); | |
| 209 } | |
| 210 // Update the interval time | |
| 211 _concurrent_timer.stop(); | |
| 212 _latest_cms_collection_end_to_collection_start_secs = _concurrent_timer.seconds(); | |
| 213 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 214 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_marking_begin: " | |
| 215 "mutator time %f", _latest_cms_collection_end_to_collection_start_secs); | |
| 216 } | |
| 217 _concurrent_timer.reset(); | |
| 218 _concurrent_timer.start(); | |
| 219 } | |
| 220 | |
| 221 void CMSAdaptiveSizePolicy::concurrent_marking_end() { | |
| 222 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 223 gclog_or_tty->stamp(); | |
| 224 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_marking_end()"); | |
| 225 } | |
| 226 | |
| 227 _concurrent_timer.stop(); | |
| 228 _latest_cms_concurrent_marking_time_secs = _concurrent_timer.seconds(); | |
| 229 | |
| 230 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 231 gclog_or_tty->print_cr("\n CMSAdaptiveSizePolicy::concurrent_marking_end" | |
| 232 ":concurrent marking time (s) %f", | |
| 233 _latest_cms_concurrent_marking_time_secs); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 void CMSAdaptiveSizePolicy::concurrent_precleaning_begin() { | |
| 238 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 239 gclog_or_tty->stamp(); | |
| 240 gclog_or_tty->print_cr( | |
| 241 "CMSAdaptiveSizePolicy::concurrent_precleaning_begin()"); | |
| 242 } | |
| 243 _concurrent_timer.reset(); | |
| 244 _concurrent_timer.start(); | |
| 245 } | |
| 246 | |
| 247 | |
| 248 void CMSAdaptiveSizePolicy::concurrent_precleaning_end() { | |
| 249 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 250 gclog_or_tty->stamp(); | |
| 251 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_precleaning_end()"); | |
| 252 } | |
| 253 | |
| 254 _concurrent_timer.stop(); | |
| 255 // May be set again by a second call during the same collection. | |
| 256 _latest_cms_concurrent_precleaning_time_secs = _concurrent_timer.seconds(); | |
| 257 | |
| 258 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 259 gclog_or_tty->print_cr("\n CMSAdaptiveSizePolicy::concurrent_precleaning_end" | |
| 260 ":concurrent precleaning time (s) %f", | |
| 261 _latest_cms_concurrent_precleaning_time_secs); | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 void CMSAdaptiveSizePolicy::concurrent_sweeping_begin() { | |
| 266 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 267 gclog_or_tty->stamp(); | |
| 268 gclog_or_tty->print_cr( | |
| 269 "CMSAdaptiveSizePolicy::concurrent_sweeping_begin()"); | |
| 270 } | |
| 271 _concurrent_timer.reset(); | |
| 272 _concurrent_timer.start(); | |
| 273 } | |
| 274 | |
| 275 | |
| 276 void CMSAdaptiveSizePolicy::concurrent_sweeping_end() { | |
| 277 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 278 gclog_or_tty->stamp(); | |
| 279 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_sweeping_end()"); | |
| 280 } | |
| 281 | |
| 282 _concurrent_timer.stop(); | |
| 283 _latest_cms_concurrent_sweeping_time_secs = _concurrent_timer.seconds(); | |
| 284 | |
| 285 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 286 gclog_or_tty->print_cr("\n CMSAdaptiveSizePolicy::concurrent_sweeping_end" | |
| 287 ":concurrent sweeping time (s) %f", | |
| 288 _latest_cms_concurrent_sweeping_time_secs); | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 void CMSAdaptiveSizePolicy::concurrent_phases_end(GCCause::Cause gc_cause, | |
| 293 size_t cur_eden, | |
| 294 size_t cur_promo) { | |
| 295 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 296 gclog_or_tty->print(" "); | |
| 297 gclog_or_tty->stamp(); | |
| 298 gclog_or_tty->print(": concurrent_phases_end "); | |
| 299 } | |
| 300 | |
| 301 // Update the concurrent timer | |
| 302 _concurrent_timer.stop(); | |
| 303 | |
| 304 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 305 UseAdaptiveSizePolicyWithSystemGC) { | |
| 306 | |
| 307 avg_cms_free()->sample(cur_promo); | |
| 308 double latest_cms_sum_concurrent_phases_time_secs = | |
| 309 concurrent_collection_time(); | |
| 310 | |
| 311 _avg_concurrent_time->sample(latest_cms_sum_concurrent_phases_time_secs); | |
| 312 | |
| 313 // Cost of collection (unit-less) | |
| 314 | |
| 315 // Total interval for collection. May not be valid. Tests | |
| 316 // below determine whether to use this. | |
| 317 // | |
| 318 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 319 gclog_or_tty->print_cr("\nCMSAdaptiveSizePolicy::concurrent_phases_end \n" | |
| 320 "_latest_cms_reset_end_to_initial_mark_start_secs %f \n" | |
| 321 "_latest_cms_initial_mark_start_to_end_time_secs %f \n" | |
| 322 "_latest_cms_remark_start_to_end_time_secs %f \n" | |
| 323 "_latest_cms_concurrent_marking_time_secs %f \n" | |
| 324 "_latest_cms_concurrent_precleaning_time_secs %f \n" | |
| 325 "_latest_cms_concurrent_sweeping_time_secs %f \n" | |
| 326 "latest_cms_sum_concurrent_phases_time_secs %f \n" | |
| 327 "_latest_cms_collection_end_to_collection_start_secs %f \n" | |
| 328 "concurrent_processor_fraction %f", | |
| 329 _latest_cms_reset_end_to_initial_mark_start_secs, | |
| 330 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 331 _latest_cms_remark_start_to_end_time_secs, | |
| 332 _latest_cms_concurrent_marking_time_secs, | |
| 333 _latest_cms_concurrent_precleaning_time_secs, | |
| 334 _latest_cms_concurrent_sweeping_time_secs, | |
| 335 latest_cms_sum_concurrent_phases_time_secs, | |
| 336 _latest_cms_collection_end_to_collection_start_secs, | |
| 337 concurrent_processor_fraction()); | |
| 338 } | |
| 339 double interval_in_seconds = | |
| 340 _latest_cms_initial_mark_start_to_end_time_secs + | |
| 341 _latest_cms_remark_start_to_end_time_secs + | |
| 342 latest_cms_sum_concurrent_phases_time_secs + | |
| 343 _latest_cms_collection_end_to_collection_start_secs; | |
| 344 assert(interval_in_seconds >= 0.0, | |
| 345 "Bad interval between cms collections"); | |
| 346 | |
| 347 // Sample for performance counter | |
| 348 avg_concurrent_interval()->sample(interval_in_seconds); | |
| 349 | |
| 350 // STW costs (initial and remark pauses) | |
| 351 // Cost of collection (unit-less) | |
| 352 assert(_latest_cms_initial_mark_start_to_end_time_secs >= 0.0, | |
| 353 "Bad initial mark pause"); | |
| 354 assert(_latest_cms_remark_start_to_end_time_secs >= 0.0, | |
| 355 "Bad remark pause"); | |
| 356 double STW_time_in_seconds = | |
| 357 _latest_cms_initial_mark_start_to_end_time_secs + | |
| 358 _latest_cms_remark_start_to_end_time_secs; | |
| 359 double STW_collection_cost = 0.0; | |
| 360 if (interval_in_seconds > 0.0) { | |
| 361 // cost for the STW phases of the concurrent collection. | |
| 362 STW_collection_cost = STW_time_in_seconds / interval_in_seconds; | |
| 363 avg_cms_STW_gc_cost()->sample(STW_collection_cost); | |
| 364 } | |
| 365 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 366 gclog_or_tty->print("cmsAdaptiveSizePolicy::STW_collection_end: " | |
| 367 "STW gc cost: %f average: %f", STW_collection_cost, | |
| 368 avg_cms_STW_gc_cost()->average()); | |
| 369 gclog_or_tty->print_cr(" STW pause: %f (ms) STW period %f (ms)", | |
| 370 (double) STW_time_in_seconds * MILLIUNITS, | |
| 371 (double) interval_in_seconds * MILLIUNITS); | |
| 372 } | |
| 373 | |
| 374 double concurrent_cost = 0.0; | |
| 375 if (latest_cms_sum_concurrent_phases_time_secs > 0.0) { | |
| 376 concurrent_cost = concurrent_collection_cost(interval_in_seconds); | |
| 377 | |
| 378 avg_concurrent_gc_cost()->sample(concurrent_cost); | |
| 379 // Average this ms cost into all the other types gc costs | |
| 380 | |
| 381 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 382 gclog_or_tty->print("cmsAdaptiveSizePolicy::concurrent_phases_end: " | |
| 383 "concurrent gc cost: %f average: %f", | |
| 384 concurrent_cost, | |
| 385 _avg_concurrent_gc_cost->average()); | |
| 386 gclog_or_tty->print_cr(" concurrent time: %f (ms) cms period %f (ms)" | |
| 387 " processor fraction: %f", | |
| 388 latest_cms_sum_concurrent_phases_time_secs * MILLIUNITS, | |
| 389 interval_in_seconds * MILLIUNITS, | |
| 390 concurrent_processor_fraction()); | |
| 391 } | |
| 392 } | |
| 393 double total_collection_cost = STW_collection_cost + concurrent_cost; | |
| 394 avg_major_gc_cost()->sample(total_collection_cost); | |
| 395 | |
| 396 // Gather information for estimating future behavior | |
| 397 double initial_pause_in_ms = _latest_cms_initial_mark_start_to_end_time_secs * MILLIUNITS; | |
| 398 double remark_pause_in_ms = _latest_cms_remark_start_to_end_time_secs * MILLIUNITS; | |
| 399 | |
| 400 double cur_promo_size_in_mbytes = ((double)cur_promo)/((double)M); | |
| 401 initial_pause_old_estimator()->update(cur_promo_size_in_mbytes, | |
| 402 initial_pause_in_ms); | |
| 403 remark_pause_old_estimator()->update(cur_promo_size_in_mbytes, | |
| 404 remark_pause_in_ms); | |
| 405 major_collection_estimator()->update(cur_promo_size_in_mbytes, | |
| 406 total_collection_cost); | |
| 407 | |
| 408 // This estimate uses the average eden size. It could also | |
| 409 // have used the latest eden size. Which is better? | |
| 410 double cur_eden_size_in_mbytes = ((double)cur_eden)/((double) M); | |
| 411 initial_pause_young_estimator()->update(cur_eden_size_in_mbytes, | |
| 412 initial_pause_in_ms); | |
| 413 remark_pause_young_estimator()->update(cur_eden_size_in_mbytes, | |
| 414 remark_pause_in_ms); | |
| 415 } | |
| 416 | |
| 417 clear_internal_time_intervals(); | |
| 418 | |
| 419 set_first_after_collection(); | |
| 420 | |
| 421 // The concurrent phases keeps track of it's own mutator interval | |
| 422 // with this timer. This allows the stop-the-world phase to | |
| 423 // be included in the mutator time so that the stop-the-world time | |
| 424 // is not double counted. Reset and start it. | |
| 425 _concurrent_timer.reset(); | |
| 426 _concurrent_timer.start(); | |
| 427 | |
| 428 // The mutator time between STW phases does not include the | |
| 429 // concurrent collection time. | |
| 430 _STW_timer.reset(); | |
| 431 _STW_timer.start(); | |
| 432 } | |
| 433 | |
| 434 void CMSAdaptiveSizePolicy::checkpoint_roots_initial_begin() { | |
| 435 // Update the interval time | |
| 436 _STW_timer.stop(); | |
| 437 _latest_cms_reset_end_to_initial_mark_start_secs = _STW_timer.seconds(); | |
| 438 // Reset for the initial mark | |
| 439 _STW_timer.reset(); | |
| 440 _STW_timer.start(); | |
| 441 } | |
| 442 | |
| 443 void CMSAdaptiveSizePolicy::checkpoint_roots_initial_end( | |
| 444 GCCause::Cause gc_cause) { | |
| 445 _STW_timer.stop(); | |
| 446 | |
| 447 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 448 UseAdaptiveSizePolicyWithSystemGC) { | |
| 449 _latest_cms_initial_mark_start_to_end_time_secs = _STW_timer.seconds(); | |
| 450 avg_initial_pause()->sample(_latest_cms_initial_mark_start_to_end_time_secs); | |
| 451 | |
| 452 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 453 gclog_or_tty->print( | |
| 454 "cmsAdaptiveSizePolicy::checkpoint_roots_initial_end: " | |
| 455 "initial pause: %f ", _latest_cms_initial_mark_start_to_end_time_secs); | |
| 456 } | |
| 457 } | |
| 458 | |
| 459 _STW_timer.reset(); | |
| 460 _STW_timer.start(); | |
| 461 } | |
| 462 | |
| 463 void CMSAdaptiveSizePolicy::checkpoint_roots_final_begin() { | |
| 464 _STW_timer.stop(); | |
| 465 _latest_cms_initial_mark_end_to_remark_start_secs = _STW_timer.seconds(); | |
| 466 // Start accumumlating time for the remark in the STW timer. | |
| 467 _STW_timer.reset(); | |
| 468 _STW_timer.start(); | |
| 469 } | |
| 470 | |
| 471 void CMSAdaptiveSizePolicy::checkpoint_roots_final_end( | |
| 472 GCCause::Cause gc_cause) { | |
| 473 _STW_timer.stop(); | |
| 474 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 475 UseAdaptiveSizePolicyWithSystemGC) { | |
| 476 // Total initial mark pause + remark pause. | |
| 477 _latest_cms_remark_start_to_end_time_secs = _STW_timer.seconds(); | |
| 478 double STW_time_in_seconds = _latest_cms_initial_mark_start_to_end_time_secs + | |
| 479 _latest_cms_remark_start_to_end_time_secs; | |
| 480 double STW_time_in_ms = STW_time_in_seconds * MILLIUNITS; | |
| 481 | |
| 482 avg_remark_pause()->sample(_latest_cms_remark_start_to_end_time_secs); | |
| 483 | |
| 484 // Sample total for initial mark + remark | |
| 485 avg_cms_STW_time()->sample(STW_time_in_seconds); | |
| 486 | |
| 487 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 488 gclog_or_tty->print("cmsAdaptiveSizePolicy::checkpoint_roots_final_end: " | |
| 489 "remark pause: %f", _latest_cms_remark_start_to_end_time_secs); | |
| 490 } | |
| 491 | |
| 492 } | |
| 493 // Don't start the STW times here because the concurrent | |
| 494 // sweep and reset has not happened. | |
| 495 // Keep the old comment above in case I don't understand | |
| 496 // what is going on but now | |
| 497 // Start the STW timer because it is used by ms_collection_begin() | |
| 498 // and ms_collection_end() to get the sweep time if a MS is being | |
| 499 // done in the foreground. | |
| 500 _STW_timer.reset(); | |
| 501 _STW_timer.start(); | |
| 502 } | |
| 503 | |
| 504 void CMSAdaptiveSizePolicy::msc_collection_begin() { | |
| 505 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 506 gclog_or_tty->print(" "); | |
| 507 gclog_or_tty->stamp(); | |
| 508 gclog_or_tty->print(": msc_collection_begin "); | |
| 509 } | |
| 510 _STW_timer.stop(); | |
| 511 _latest_cms_msc_end_to_msc_start_time_secs = _STW_timer.seconds(); | |
| 512 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 513 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::msc_collection_begin: " | |
| 514 "mutator time %f", | |
| 515 _latest_cms_msc_end_to_msc_start_time_secs); | |
| 516 } | |
| 517 avg_msc_interval()->sample(_latest_cms_msc_end_to_msc_start_time_secs); | |
| 518 _STW_timer.reset(); | |
| 519 _STW_timer.start(); | |
| 520 } | |
| 521 | |
| 522 void CMSAdaptiveSizePolicy::msc_collection_end(GCCause::Cause gc_cause) { | |
| 523 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 524 gclog_or_tty->print(" "); | |
| 525 gclog_or_tty->stamp(); | |
| 526 gclog_or_tty->print(": msc_collection_end "); | |
| 527 } | |
| 528 _STW_timer.stop(); | |
| 529 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 530 UseAdaptiveSizePolicyWithSystemGC) { | |
| 531 double msc_pause_in_seconds = _STW_timer.seconds(); | |
| 532 if ((_latest_cms_msc_end_to_msc_start_time_secs > 0.0) && | |
| 533 (msc_pause_in_seconds > 0.0)) { | |
| 534 avg_msc_pause()->sample(msc_pause_in_seconds); | |
| 535 double mutator_time_in_seconds = 0.0; | |
| 536 if (_latest_cms_collection_end_to_collection_start_secs == 0.0) { | |
| 537 // This assertion may fail because of time stamp gradularity. | |
| 538 // Comment it out and investiage it at a later time. The large | |
| 539 // time stamp granularity occurs on some older linux systems. | |
| 540 #ifndef CLOCK_GRANULARITY_TOO_LARGE | |
| 541 assert((_latest_cms_concurrent_marking_time_secs == 0.0) && | |
| 542 (_latest_cms_concurrent_precleaning_time_secs == 0.0) && | |
| 543 (_latest_cms_concurrent_sweeping_time_secs == 0.0), | |
| 544 "There should not be any concurrent time"); | |
| 545 #endif | |
| 546 // A concurrent collection did not start. Mutator time | |
| 547 // between collections comes from the STW MSC timer. | |
| 548 mutator_time_in_seconds = _latest_cms_msc_end_to_msc_start_time_secs; | |
| 549 } else { | |
| 550 // The concurrent collection did start so count the mutator | |
| 551 // time to the start of the concurrent collection. In this | |
| 552 // case the _latest_cms_msc_end_to_msc_start_time_secs measures | |
| 553 // the time between the initial mark or remark and the | |
| 554 // start of the MSC. That has no real meaning. | |
| 555 mutator_time_in_seconds = _latest_cms_collection_end_to_collection_start_secs; | |
| 556 } | |
| 557 | |
| 558 double latest_cms_sum_concurrent_phases_time_secs = | |
| 559 concurrent_collection_time(); | |
| 560 double interval_in_seconds = | |
| 561 mutator_time_in_seconds + | |
| 562 _latest_cms_initial_mark_start_to_end_time_secs + | |
| 563 _latest_cms_remark_start_to_end_time_secs + | |
| 564 latest_cms_sum_concurrent_phases_time_secs + | |
| 565 msc_pause_in_seconds; | |
| 566 | |
| 567 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 568 gclog_or_tty->print_cr(" interval_in_seconds %f \n" | |
| 569 " mutator_time_in_seconds %f \n" | |
| 570 " _latest_cms_initial_mark_start_to_end_time_secs %f\n" | |
| 571 " _latest_cms_remark_start_to_end_time_secs %f\n" | |
| 572 " latest_cms_sum_concurrent_phases_time_secs %f\n" | |
| 573 " msc_pause_in_seconds %f\n", | |
| 574 interval_in_seconds, | |
| 575 mutator_time_in_seconds, | |
| 576 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 577 _latest_cms_remark_start_to_end_time_secs, | |
| 578 latest_cms_sum_concurrent_phases_time_secs, | |
| 579 msc_pause_in_seconds); | |
| 580 } | |
| 581 | |
| 582 // The concurrent cost is wasted cost but it should be | |
| 583 // included. | |
| 584 double concurrent_cost = concurrent_collection_cost(interval_in_seconds); | |
| 585 | |
| 586 // Initial mark and remark, also wasted. | |
| 587 double STW_time_in_seconds = _latest_cms_initial_mark_start_to_end_time_secs + | |
| 588 _latest_cms_remark_start_to_end_time_secs; | |
| 589 double STW_collection_cost = | |
| 590 collection_cost(STW_time_in_seconds, interval_in_seconds) + | |
| 591 concurrent_cost; | |
| 592 | |
| 593 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 594 gclog_or_tty->print_cr(" msc_collection_end:\n" | |
| 595 "_latest_cms_collection_end_to_collection_start_secs %f\n" | |
| 596 "_latest_cms_msc_end_to_msc_start_time_secs %f\n" | |
| 597 "_latest_cms_initial_mark_start_to_end_time_secs %f\n" | |
| 598 "_latest_cms_remark_start_to_end_time_secs %f\n" | |
| 599 "latest_cms_sum_concurrent_phases_time_secs %f\n", | |
| 600 _latest_cms_collection_end_to_collection_start_secs, | |
| 601 _latest_cms_msc_end_to_msc_start_time_secs, | |
| 602 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 603 _latest_cms_remark_start_to_end_time_secs, | |
| 604 latest_cms_sum_concurrent_phases_time_secs); | |
| 605 | |
| 606 gclog_or_tty->print_cr(" msc_collection_end: \n" | |
| 607 "latest_cms_sum_concurrent_phases_time_secs %f\n" | |
| 608 "STW_time_in_seconds %f\n" | |
| 609 "msc_pause_in_seconds %f\n", | |
| 610 latest_cms_sum_concurrent_phases_time_secs, | |
| 611 STW_time_in_seconds, | |
| 612 msc_pause_in_seconds); | |
| 613 } | |
| 614 | |
| 615 double cost = concurrent_cost + STW_collection_cost + | |
| 616 collection_cost(msc_pause_in_seconds, interval_in_seconds); | |
| 617 | |
| 618 _avg_msc_gc_cost->sample(cost); | |
| 619 | |
| 620 // Average this ms cost into all the other types gc costs | |
| 621 avg_major_gc_cost()->sample(cost); | |
| 622 | |
| 623 // Sample for performance counter | |
| 624 _avg_msc_interval->sample(interval_in_seconds); | |
| 625 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 626 gclog_or_tty->print("cmsAdaptiveSizePolicy::msc_collection_end: " | |
| 627 "MSC gc cost: %f average: %f", cost, | |
| 628 _avg_msc_gc_cost->average()); | |
| 629 | |
| 630 double msc_pause_in_ms = msc_pause_in_seconds * MILLIUNITS; | |
| 631 gclog_or_tty->print_cr(" MSC pause: %f (ms) MSC period %f (ms)", | |
| 632 msc_pause_in_ms, (double) interval_in_seconds * MILLIUNITS); | |
| 633 } | |
| 634 } | |
| 635 } | |
| 636 | |
| 637 clear_internal_time_intervals(); | |
| 638 | |
| 639 // Can this call be put into the epilogue? | |
| 640 set_first_after_collection(); | |
| 641 | |
| 642 // The concurrent phases keeps track of it's own mutator interval | |
| 643 // with this timer. This allows the stop-the-world phase to | |
| 644 // be included in the mutator time so that the stop-the-world time | |
| 645 // is not double counted. Reset and start it. | |
| 646 _concurrent_timer.stop(); | |
| 647 _concurrent_timer.reset(); | |
| 648 _concurrent_timer.start(); | |
| 649 | |
| 650 _STW_timer.reset(); | |
| 651 _STW_timer.start(); | |
| 652 } | |
| 653 | |
| 654 void CMSAdaptiveSizePolicy::ms_collection_begin() { | |
| 655 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 656 gclog_or_tty->print(" "); | |
| 657 gclog_or_tty->stamp(); | |
| 658 gclog_or_tty->print(": ms_collection_begin "); | |
| 659 } | |
| 660 _STW_timer.stop(); | |
| 661 _latest_cms_ms_end_to_ms_start = _STW_timer.seconds(); | |
| 662 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 663 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::ms_collection_begin: " | |
| 664 "mutator time %f", | |
| 665 _latest_cms_ms_end_to_ms_start); | |
| 666 } | |
| 667 avg_ms_interval()->sample(_STW_timer.seconds()); | |
| 668 _STW_timer.reset(); | |
| 669 _STW_timer.start(); | |
| 670 } | |
| 671 | |
| 672 void CMSAdaptiveSizePolicy::ms_collection_end(GCCause::Cause gc_cause) { | |
| 673 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 674 gclog_or_tty->print(" "); | |
| 675 gclog_or_tty->stamp(); | |
| 676 gclog_or_tty->print(": ms_collection_end "); | |
| 677 } | |
| 678 _STW_timer.stop(); | |
| 679 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 680 UseAdaptiveSizePolicyWithSystemGC) { | |
| 681 // The MS collection is a foreground collection that does all | |
| 682 // the parts of a mostly concurrent collection. | |
| 683 // | |
| 684 // For this collection include the cost of the | |
| 685 // initial mark | |
| 686 // remark | |
| 687 // all concurrent time (scaled down by the | |
| 688 // concurrent_processor_fraction). Some | |
| 689 // may be zero if the baton was passed before | |
| 690 // it was reached. | |
| 691 // concurrent marking | |
| 692 // sweeping | |
| 693 // resetting | |
| 694 // STW after baton was passed (STW_in_foreground_in_seconds) | |
| 695 double STW_in_foreground_in_seconds = _STW_timer.seconds(); | |
| 696 | |
| 697 double latest_cms_sum_concurrent_phases_time_secs = | |
| 698 concurrent_collection_time(); | |
| 699 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 700 gclog_or_tty->print_cr("\nCMSAdaptiveSizePolicy::ms_collecton_end " | |
| 701 "STW_in_foreground_in_seconds %f " | |
| 702 "_latest_cms_initial_mark_start_to_end_time_secs %f " | |
| 703 "_latest_cms_remark_start_to_end_time_secs %f " | |
| 704 "latest_cms_sum_concurrent_phases_time_secs %f " | |
| 705 "_latest_cms_ms_marking_start_to_end_time_secs %f " | |
| 706 "_latest_cms_ms_end_to_ms_start %f", | |
| 707 STW_in_foreground_in_seconds, | |
| 708 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 709 _latest_cms_remark_start_to_end_time_secs, | |
| 710 latest_cms_sum_concurrent_phases_time_secs, | |
| 711 _latest_cms_ms_marking_start_to_end_time_secs, | |
| 712 _latest_cms_ms_end_to_ms_start); | |
| 713 } | |
| 714 | |
| 715 double STW_marking_in_seconds = _latest_cms_initial_mark_start_to_end_time_secs + | |
| 716 _latest_cms_remark_start_to_end_time_secs; | |
| 717 #ifndef CLOCK_GRANULARITY_TOO_LARGE | |
| 718 assert(_latest_cms_ms_marking_start_to_end_time_secs == 0.0 || | |
| 719 latest_cms_sum_concurrent_phases_time_secs == 0.0, | |
| 720 "marking done twice?"); | |
| 721 #endif | |
| 722 double ms_time_in_seconds = STW_marking_in_seconds + | |
| 723 STW_in_foreground_in_seconds + | |
| 724 _latest_cms_ms_marking_start_to_end_time_secs + | |
| 725 scaled_concurrent_collection_time(); | |
| 726 avg_ms_pause()->sample(ms_time_in_seconds); | |
| 727 // Use the STW costs from the initial mark and remark plus | |
| 728 // the cost of the concurrent phase to calculate a | |
| 729 // collection cost. | |
| 730 double cost = 0.0; | |
| 731 if ((_latest_cms_ms_end_to_ms_start > 0.0) && | |
| 732 (ms_time_in_seconds > 0.0)) { | |
| 733 double interval_in_seconds = | |
| 734 _latest_cms_ms_end_to_ms_start + ms_time_in_seconds; | |
| 735 | |
| 736 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 737 gclog_or_tty->print_cr("\n ms_time_in_seconds %f " | |
| 738 "latest_cms_sum_concurrent_phases_time_secs %f " | |
| 739 "interval_in_seconds %f", | |
| 740 ms_time_in_seconds, | |
| 741 latest_cms_sum_concurrent_phases_time_secs, | |
| 742 interval_in_seconds); | |
| 743 } | |
| 744 | |
| 745 cost = collection_cost(ms_time_in_seconds, interval_in_seconds); | |
| 746 | |
| 747 _avg_ms_gc_cost->sample(cost); | |
| 748 // Average this ms cost into all the other types gc costs | |
| 749 avg_major_gc_cost()->sample(cost); | |
| 750 | |
| 751 // Sample for performance counter | |
| 752 _avg_ms_interval->sample(interval_in_seconds); | |
| 753 } | |
| 754 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 755 gclog_or_tty->print("cmsAdaptiveSizePolicy::ms_collection_end: " | |
| 756 "MS gc cost: %f average: %f", cost, _avg_ms_gc_cost->average()); | |
| 757 | |
| 758 double ms_time_in_ms = ms_time_in_seconds * MILLIUNITS; | |
| 759 gclog_or_tty->print_cr(" MS pause: %f (ms) MS period %f (ms)", | |
| 760 ms_time_in_ms, | |
| 761 _latest_cms_ms_end_to_ms_start * MILLIUNITS); | |
| 762 } | |
| 763 } | |
| 764 | |
| 765 // Consider putting this code (here to end) into a | |
| 766 // method for convenience. | |
| 767 clear_internal_time_intervals(); | |
| 768 | |
| 769 set_first_after_collection(); | |
| 770 | |
| 771 // The concurrent phases keeps track of it's own mutator interval | |
| 772 // with this timer. This allows the stop-the-world phase to | |
| 773 // be included in the mutator time so that the stop-the-world time | |
| 774 // is not double counted. Reset and start it. | |
| 775 _concurrent_timer.stop(); | |
| 776 _concurrent_timer.reset(); | |
| 777 _concurrent_timer.start(); | |
| 778 | |
| 779 _STW_timer.reset(); | |
| 780 _STW_timer.start(); | |
| 781 } | |
| 782 | |
| 783 void CMSAdaptiveSizePolicy::clear_internal_time_intervals() { | |
| 784 _latest_cms_reset_end_to_initial_mark_start_secs = 0.0; | |
| 785 _latest_cms_initial_mark_end_to_remark_start_secs = 0.0; | |
| 786 _latest_cms_collection_end_to_collection_start_secs = 0.0; | |
| 787 _latest_cms_concurrent_marking_time_secs = 0.0; | |
| 788 _latest_cms_concurrent_precleaning_time_secs = 0.0; | |
| 789 _latest_cms_concurrent_sweeping_time_secs = 0.0; | |
| 790 _latest_cms_msc_end_to_msc_start_time_secs = 0.0; | |
| 791 _latest_cms_ms_end_to_ms_start = 0.0; | |
| 792 _latest_cms_remark_start_to_end_time_secs = 0.0; | |
| 793 _latest_cms_initial_mark_start_to_end_time_secs = 0.0; | |
| 794 _latest_cms_ms_marking_start_to_end_time_secs = 0.0; | |
| 795 } | |
| 796 | |
| 797 void CMSAdaptiveSizePolicy::clear_generation_free_space_flags() { | |
| 798 AdaptiveSizePolicy::clear_generation_free_space_flags(); | |
| 799 | |
| 800 set_change_young_gen_for_maj_pauses(0); | |
| 801 } | |
| 802 | |
| 803 void CMSAdaptiveSizePolicy::concurrent_phases_resume() { | |
| 804 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 805 gclog_or_tty->stamp(); | |
| 806 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_phases_resume()"); | |
| 807 } | |
| 808 _concurrent_timer.start(); | |
| 809 } | |
| 810 | |
| 811 double CMSAdaptiveSizePolicy::time_since_major_gc() const { | |
| 812 _concurrent_timer.stop(); | |
| 813 double time_since_cms_gc = _concurrent_timer.seconds(); | |
| 814 _concurrent_timer.start(); | |
| 815 _STW_timer.stop(); | |
| 816 double time_since_STW_gc = _STW_timer.seconds(); | |
| 817 _STW_timer.start(); | |
| 818 | |
| 819 return MIN2(time_since_cms_gc, time_since_STW_gc); | |
| 820 } | |
| 821 | |
| 822 double CMSAdaptiveSizePolicy::major_gc_interval_average_for_decay() const { | |
| 823 double cms_interval = _avg_concurrent_interval->average(); | |
| 824 double msc_interval = _avg_msc_interval->average(); | |
| 825 double ms_interval = _avg_ms_interval->average(); | |
| 826 | |
| 827 return MAX3(cms_interval, msc_interval, ms_interval); | |
| 828 } | |
| 829 | |
| 830 double CMSAdaptiveSizePolicy::cms_gc_cost() const { | |
| 831 return avg_major_gc_cost()->average(); | |
| 832 } | |
| 833 | |
| 834 void CMSAdaptiveSizePolicy::ms_collection_marking_begin() { | |
| 835 _STW_timer.stop(); | |
| 836 // Start accumumlating time for the marking in the STW timer. | |
| 837 _STW_timer.reset(); | |
| 838 _STW_timer.start(); | |
| 839 } | |
| 840 | |
| 841 void CMSAdaptiveSizePolicy::ms_collection_marking_end( | |
| 842 GCCause::Cause gc_cause) { | |
| 843 _STW_timer.stop(); | |
| 844 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 845 UseAdaptiveSizePolicyWithSystemGC) { | |
| 846 _latest_cms_ms_marking_start_to_end_time_secs = _STW_timer.seconds(); | |
| 847 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 848 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::" | |
| 849 "msc_collection_marking_end: mutator time %f", | |
| 850 _latest_cms_ms_marking_start_to_end_time_secs); | |
| 851 } | |
| 852 } | |
| 853 _STW_timer.reset(); | |
| 854 _STW_timer.start(); | |
| 855 } | |
| 856 | |
| 857 double CMSAdaptiveSizePolicy::gc_cost() const { | |
| 858 double cms_gen_cost = cms_gc_cost(); | |
| 859 double result = MIN2(1.0, minor_gc_cost() + cms_gen_cost); | |
| 860 assert(result >= 0.0, "Both minor and major costs are non-negative"); | |
| 861 return result; | |
| 862 } | |
| 863 | |
| 864 // Cost of collection (unit-less) | |
| 865 double CMSAdaptiveSizePolicy::collection_cost(double pause_in_seconds, | |
| 866 double interval_in_seconds) { | |
| 867 // Cost of collection (unit-less) | |
| 868 double cost = 0.0; | |
| 869 if ((interval_in_seconds > 0.0) && | |
| 870 (pause_in_seconds > 0.0)) { | |
| 871 cost = | |
| 872 pause_in_seconds / interval_in_seconds; | |
| 873 } | |
| 874 return cost; | |
| 875 } | |
| 876 | |
| 877 size_t CMSAdaptiveSizePolicy::adjust_eden_for_pause_time(size_t cur_eden) { | |
| 878 size_t change = 0; | |
| 879 size_t desired_eden = cur_eden; | |
| 880 | |
| 881 // reduce eden size | |
| 882 change = eden_decrement_aligned_down(cur_eden); | |
| 883 desired_eden = cur_eden - change; | |
| 884 | |
| 885 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 886 gclog_or_tty->print_cr( | |
| 887 "CMSAdaptiveSizePolicy::adjust_eden_for_pause_time " | |
| 888 "adjusting eden for pause time. " | |
| 889 " starting eden size " SIZE_FORMAT | |
| 890 " reduced eden size " SIZE_FORMAT | |
| 891 " eden delta " SIZE_FORMAT, | |
| 892 cur_eden, desired_eden, change); | |
| 893 } | |
| 894 | |
| 895 return desired_eden; | |
| 896 } | |
| 897 | |
| 898 size_t CMSAdaptiveSizePolicy::adjust_eden_for_throughput(size_t cur_eden) { | |
| 899 | |
| 900 size_t desired_eden = cur_eden; | |
| 901 | |
| 902 set_change_young_gen_for_throughput(increase_young_gen_for_througput_true); | |
| 903 | |
| 904 size_t change = eden_increment_aligned_up(cur_eden); | |
| 905 size_t scaled_change = scale_by_gen_gc_cost(change, minor_gc_cost()); | |
| 906 | |
| 907 if (cur_eden + scaled_change > cur_eden) { | |
| 908 desired_eden = cur_eden + scaled_change; | |
| 909 } | |
| 910 | |
| 911 _young_gen_change_for_minor_throughput++; | |
| 912 | |
| 913 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 914 gclog_or_tty->print_cr( | |
| 915 "CMSAdaptiveSizePolicy::adjust_eden_for_throughput " | |
| 916 "adjusting eden for throughput. " | |
| 917 " starting eden size " SIZE_FORMAT | |
| 918 " increased eden size " SIZE_FORMAT | |
| 919 " eden delta " SIZE_FORMAT, | |
| 920 cur_eden, desired_eden, scaled_change); | |
| 921 } | |
| 922 | |
| 923 return desired_eden; | |
| 924 } | |
| 925 | |
| 926 size_t CMSAdaptiveSizePolicy::adjust_eden_for_footprint(size_t cur_eden) { | |
| 927 | |
| 928 set_decrease_for_footprint(decrease_young_gen_for_footprint_true); | |
| 929 | |
| 930 size_t change = eden_decrement(cur_eden); | |
| 931 size_t desired_eden_size = cur_eden - change; | |
| 932 | |
| 933 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 934 gclog_or_tty->print_cr( | |
| 935 "CMSAdaptiveSizePolicy::adjust_eden_for_footprint " | |
| 936 "adjusting eden for footprint. " | |
| 937 " starting eden size " SIZE_FORMAT | |
| 938 " reduced eden size " SIZE_FORMAT | |
| 939 " eden delta " SIZE_FORMAT, | |
| 940 cur_eden, desired_eden_size, change); | |
| 941 } | |
| 942 return desired_eden_size; | |
| 943 } | |
| 944 | |
| 945 // The eden and promo versions should be combined if possible. | |
| 946 // They are the same except that the sizes of the decrement | |
| 947 // and increment are different for eden and promo. | |
| 948 size_t CMSAdaptiveSizePolicy::eden_decrement_aligned_down(size_t cur_eden) { | |
| 949 size_t delta = eden_decrement(cur_eden); | |
| 950 return align_size_down(delta, generation_alignment()); | |
| 951 } | |
| 952 | |
| 953 size_t CMSAdaptiveSizePolicy::eden_increment_aligned_up(size_t cur_eden) { | |
| 954 size_t delta = eden_increment(cur_eden); | |
| 955 return align_size_up(delta, generation_alignment()); | |
| 956 } | |
| 957 | |
| 958 size_t CMSAdaptiveSizePolicy::promo_decrement_aligned_down(size_t cur_promo) { | |
| 959 size_t delta = promo_decrement(cur_promo); | |
| 960 return align_size_down(delta, generation_alignment()); | |
| 961 } | |
| 962 | |
| 963 size_t CMSAdaptiveSizePolicy::promo_increment_aligned_up(size_t cur_promo) { | |
| 964 size_t delta = promo_increment(cur_promo); | |
| 965 return align_size_up(delta, generation_alignment()); | |
| 966 } | |
| 967 | |
| 968 | |
| 969 void CMSAdaptiveSizePolicy::compute_young_generation_free_space(size_t cur_eden, | |
| 970 size_t max_eden_size) | |
| 971 { | |
| 972 size_t desired_eden_size = cur_eden; | |
| 973 size_t eden_limit = max_eden_size; | |
| 974 | |
| 975 // Printout input | |
| 976 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 977 gclog_or_tty->print_cr( | |
| 978 "CMSAdaptiveSizePolicy::compute_young_generation_free_space: " | |
| 979 "cur_eden " SIZE_FORMAT, | |
| 980 cur_eden); | |
| 981 } | |
| 982 | |
| 983 // Used for diagnostics | |
| 984 clear_generation_free_space_flags(); | |
| 985 | |
| 986 if (_avg_minor_pause->padded_average() > gc_pause_goal_sec()) { | |
| 987 if (minor_pause_young_estimator()->decrement_will_decrease()) { | |
| 988 // If the minor pause is too long, shrink the young gen. | |
| 989 set_change_young_gen_for_min_pauses( | |
| 990 decrease_young_gen_for_min_pauses_true); | |
| 991 desired_eden_size = adjust_eden_for_pause_time(desired_eden_size); | |
| 992 } | |
| 993 } else if ((avg_remark_pause()->padded_average() > gc_pause_goal_sec()) || | |
| 994 (avg_initial_pause()->padded_average() > gc_pause_goal_sec())) { | |
| 995 // The remark or initial pauses are not meeting the goal. Should | |
| 996 // the generation be shrunk? | |
| 997 if (get_and_clear_first_after_collection() && | |
| 998 ((avg_remark_pause()->padded_average() > gc_pause_goal_sec() && | |
| 999 remark_pause_young_estimator()->decrement_will_decrease()) || | |
| 1000 (avg_initial_pause()->padded_average() > gc_pause_goal_sec() && | |
| 1001 initial_pause_young_estimator()->decrement_will_decrease()))) { | |
| 1002 | |
| 1003 set_change_young_gen_for_maj_pauses( | |
| 1004 decrease_young_gen_for_maj_pauses_true); | |
| 1005 | |
| 1006 // If the remark or initial pause is too long and this is the | |
| 1007 // first young gen collection after a cms collection, shrink | |
| 1008 // the young gen. | |
| 1009 desired_eden_size = adjust_eden_for_pause_time(desired_eden_size); | |
| 1010 } | |
| 1011 // If not the first young gen collection after a cms collection, | |
| 1012 // don't do anything. In this case an adjustment has already | |
| 1013 // been made and the results of the adjustment has not yet been | |
| 1014 // measured. | |
| 1015 } else if ((minor_gc_cost() >= 0.0) && | |
| 1016 (adjusted_mutator_cost() < _throughput_goal)) { | |
| 1017 desired_eden_size = adjust_eden_for_throughput(desired_eden_size); | |
| 1018 } else { | |
| 1019 desired_eden_size = adjust_eden_for_footprint(desired_eden_size); | |
| 1020 } | |
| 1021 | |
| 1022 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 1023 gclog_or_tty->print_cr( | |
| 1024 "CMSAdaptiveSizePolicy::compute_young_generation_free_space limits:" | |
| 1025 " desired_eden_size: " SIZE_FORMAT | |
| 1026 " old_eden_size: " SIZE_FORMAT, | |
| 1027 desired_eden_size, cur_eden); | |
| 1028 } | |
| 1029 | |
| 1030 set_eden_size(desired_eden_size); | |
| 1031 } | |
| 1032 | |
| 1033 size_t CMSAdaptiveSizePolicy::adjust_promo_for_pause_time(size_t cur_promo) { | |
| 1034 size_t change = 0; | |
| 1035 size_t desired_promo = cur_promo; | |
| 1036 // Move this test up to caller like the adjust_eden_for_pause_time() | |
| 1037 // call. | |
| 1038 if ((AdaptiveSizePausePolicy == 0) && | |
| 1039 ((avg_remark_pause()->padded_average() > gc_pause_goal_sec()) || | |
| 1040 (avg_initial_pause()->padded_average() > gc_pause_goal_sec()))) { | |
| 1041 set_change_old_gen_for_maj_pauses(decrease_old_gen_for_maj_pauses_true); | |
| 1042 change = promo_decrement_aligned_down(cur_promo); | |
| 1043 desired_promo = cur_promo - change; | |
| 1044 } else if ((AdaptiveSizePausePolicy > 0) && | |
| 1045 (((avg_remark_pause()->padded_average() > gc_pause_goal_sec()) && | |
| 1046 remark_pause_old_estimator()->decrement_will_decrease()) || | |
| 1047 ((avg_initial_pause()->padded_average() > gc_pause_goal_sec()) && | |
| 1048 initial_pause_old_estimator()->decrement_will_decrease()))) { | |
| 1049 set_change_old_gen_for_maj_pauses(decrease_old_gen_for_maj_pauses_true); | |
| 1050 change = promo_decrement_aligned_down(cur_promo); | |
| 1051 desired_promo = cur_promo - change; | |
| 1052 } | |
| 1053 | |
| 1054 if ((change != 0) &&PrintAdaptiveSizePolicy && Verbose) { | |
| 1055 gclog_or_tty->print_cr( | |
| 1056 "CMSAdaptiveSizePolicy::adjust_promo_for_pause_time " | |
| 1057 "adjusting promo for pause time. " | |
| 1058 " starting promo size " SIZE_FORMAT | |
| 1059 " reduced promo size " SIZE_FORMAT | |
| 1060 " promo delta " SIZE_FORMAT, | |
| 1061 cur_promo, desired_promo, change); | |
| 1062 } | |
| 1063 | |
| 1064 return desired_promo; | |
| 1065 } | |
| 1066 | |
| 1067 // Try to share this with PS. | |
| 1068 size_t CMSAdaptiveSizePolicy::scale_by_gen_gc_cost(size_t base_change, | |
| 1069 double gen_gc_cost) { | |
| 1070 | |
| 1071 // Calculate the change to use for the tenured gen. | |
| 1072 size_t scaled_change = 0; | |
| 1073 // Can the increment to the generation be scaled? | |
| 1074 if (gc_cost() >= 0.0 && gen_gc_cost >= 0.0) { | |
| 1075 double scale_by_ratio = gen_gc_cost / gc_cost(); | |
| 1076 scaled_change = | |
| 1077 (size_t) (scale_by_ratio * (double) base_change); | |
| 1078 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 1079 gclog_or_tty->print_cr( | |
| 1080 "Scaled tenured increment: " SIZE_FORMAT " by %f down to " | |
| 1081 SIZE_FORMAT, | |
| 1082 base_change, scale_by_ratio, scaled_change); | |
| 1083 } | |
| 1084 } else if (gen_gc_cost >= 0.0) { | |
| 1085 // Scaling is not going to work. If the major gc time is the | |
| 1086 // larger than the other GC costs, give it a full increment. | |
| 1087 if (gen_gc_cost >= (gc_cost() - gen_gc_cost)) { | |
| 1088 scaled_change = base_change; | |
| 1089 } | |
| 1090 } else { | |
| 1091 // Don't expect to get here but it's ok if it does | |
| 1092 // in the product build since the delta will be 0 | |
| 1093 // and nothing will change. | |
| 1094 assert(false, "Unexpected value for gc costs"); | |
| 1095 } | |
| 1096 | |
| 1097 return scaled_change; | |
| 1098 } | |
| 1099 | |
| 1100 size_t CMSAdaptiveSizePolicy::adjust_promo_for_throughput(size_t cur_promo) { | |
| 1101 | |
| 1102 size_t desired_promo = cur_promo; | |
| 1103 | |
| 1104 set_change_old_gen_for_throughput(increase_old_gen_for_throughput_true); | |
| 1105 | |
| 1106 size_t change = promo_increment_aligned_up(cur_promo); | |
| 1107 size_t scaled_change = scale_by_gen_gc_cost(change, major_gc_cost()); | |
| 1108 | |
| 1109 if (cur_promo + scaled_change > cur_promo) { | |
| 1110 desired_promo = cur_promo + scaled_change; | |
| 1111 } | |
| 1112 | |
| 1113 _old_gen_change_for_major_throughput++; | |
| 1114 | |
| 1115 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 1116 gclog_or_tty->print_cr( | |
| 1117 "CMSAdaptiveSizePolicy::adjust_promo_for_throughput " | |
| 1118 "adjusting promo for throughput. " | |
| 1119 " starting promo size " SIZE_FORMAT | |
| 1120 " increased promo size " SIZE_FORMAT | |
| 1121 " promo delta " SIZE_FORMAT, | |
| 1122 cur_promo, desired_promo, scaled_change); | |
| 1123 } | |
| 1124 | |
| 1125 return desired_promo; | |
| 1126 } | |
| 1127 | |
| 1128 size_t CMSAdaptiveSizePolicy::adjust_promo_for_footprint(size_t cur_promo, | |
| 1129 size_t cur_eden) { | |
| 1130 | |
| 1131 set_decrease_for_footprint(decrease_young_gen_for_footprint_true); | |
| 1132 | |
| 1133 size_t change = promo_decrement(cur_promo); | |
| 1134 size_t desired_promo_size = cur_promo - change; | |
| 1135 | |
| 1136 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 1137 gclog_or_tty->print_cr( | |
| 1138 "CMSAdaptiveSizePolicy::adjust_promo_for_footprint " | |
| 1139 "adjusting promo for footprint. " | |
| 1140 " starting promo size " SIZE_FORMAT | |
| 1141 " reduced promo size " SIZE_FORMAT | |
| 1142 " promo delta " SIZE_FORMAT, | |
| 1143 cur_promo, desired_promo_size, change); | |
| 1144 } | |
| 1145 return desired_promo_size; | |
| 1146 } | |
| 1147 | |
| 1148 void CMSAdaptiveSizePolicy::compute_tenured_generation_free_space( | |
| 1149 size_t cur_tenured_free, | |
| 1150 size_t max_tenured_available, | |
| 1151 size_t cur_eden) { | |
| 1152 // This can be bad if the desired value grows/shrinks without | |
| 1153 // any connection to the read free space | |
| 1154 size_t desired_promo_size = promo_size(); | |
| 1155 size_t tenured_limit = max_tenured_available; | |
| 1156 | |
| 1157 // Printout input | |
| 1158 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 1159 gclog_or_tty->print_cr( | |
| 1160 "CMSAdaptiveSizePolicy::compute_tenured_generation_free_space: " | |
| 1161 "cur_tenured_free " SIZE_FORMAT | |
| 1162 " max_tenured_available " SIZE_FORMAT, | |
| 1163 cur_tenured_free, max_tenured_available); | |
| 1164 } | |
| 1165 | |
| 1166 // Used for diagnostics | |
| 1167 clear_generation_free_space_flags(); | |
| 1168 | |
| 1169 set_decide_at_full_gc(decide_at_full_gc_true); | |
| 1170 if (avg_remark_pause()->padded_average() > gc_pause_goal_sec() || | |
| 1171 avg_initial_pause()->padded_average() > gc_pause_goal_sec()) { | |
| 1172 desired_promo_size = adjust_promo_for_pause_time(cur_tenured_free); | |
| 1173 } else if (avg_minor_pause()->padded_average() > gc_pause_goal_sec()) { | |
| 1174 // Nothing to do since the minor collections are too large and | |
| 1175 // this method only deals with the cms generation. | |
| 1176 } else if ((cms_gc_cost() >= 0.0) && | |
| 1177 (adjusted_mutator_cost() < _throughput_goal)) { | |
| 1178 desired_promo_size = adjust_promo_for_throughput(cur_tenured_free); | |
| 1179 } else { | |
| 1180 desired_promo_size = adjust_promo_for_footprint(cur_tenured_free, | |
| 1181 cur_eden); | |
| 1182 } | |
| 1183 | |
| 1184 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 1185 gclog_or_tty->print_cr( | |
| 1186 "CMSAdaptiveSizePolicy::compute_tenured_generation_free_space limits:" | |
| 1187 " desired_promo_size: " SIZE_FORMAT | |
| 1188 " old_promo_size: " SIZE_FORMAT, | |
| 1189 desired_promo_size, cur_tenured_free); | |
| 1190 } | |
| 1191 | |
| 1192 set_promo_size(desired_promo_size); | |
| 1193 } | |
| 1194 | |
| 1195 int CMSAdaptiveSizePolicy::compute_survivor_space_size_and_threshold( | |
| 1196 bool is_survivor_overflow, | |
| 1197 int tenuring_threshold, | |
| 1198 size_t survivor_limit) { | |
| 1199 assert(survivor_limit >= generation_alignment(), | |
| 1200 "survivor_limit too small"); | |
| 1201 assert((size_t)align_size_down(survivor_limit, generation_alignment()) | |
| 1202 == survivor_limit, "survivor_limit not aligned"); | |
| 1203 | |
| 1204 // Change UsePSAdaptiveSurvivorSizePolicy -> UseAdaptiveSurvivorSizePolicy? | |
| 1205 if (!UsePSAdaptiveSurvivorSizePolicy || | |
| 1206 !young_gen_policy_is_ready()) { | |
| 1207 return tenuring_threshold; | |
| 1208 } | |
| 1209 | |
| 1210 // We'll decide whether to increase or decrease the tenuring | |
| 1211 // threshold based partly on the newly computed survivor size | |
| 1212 // (if we hit the maximum limit allowed, we'll always choose to | |
| 1213 // decrement the threshold). | |
| 1214 bool incr_tenuring_threshold = false; | |
| 1215 bool decr_tenuring_threshold = false; | |
| 1216 | |
| 1217 set_decrement_tenuring_threshold_for_gc_cost(false); | |
| 1218 set_increment_tenuring_threshold_for_gc_cost(false); | |
| 1219 set_decrement_tenuring_threshold_for_survivor_limit(false); | |
| 1220 | |
| 1221 if (!is_survivor_overflow) { | |
| 1222 // Keep running averages on how much survived | |
| 1223 | |
| 1224 // We use the tenuring threshold to equalize the cost of major | |
| 1225 // and minor collections. | |
| 1226 // ThresholdTolerance is used to indicate how sensitive the | |
| 1227 // tenuring threshold is to differences in cost betweent the | |
| 1228 // collection types. | |
| 1229 | |
| 1230 // Get the times of interest. This involves a little work, so | |
| 1231 // we cache the values here. | |
| 1232 const double major_cost = major_gc_cost(); | |
| 1233 const double minor_cost = minor_gc_cost(); | |
| 1234 | |
| 1235 if (minor_cost > major_cost * _threshold_tolerance_percent) { | |
| 1236 // Minor times are getting too long; lower the threshold so | |
| 1237 // less survives and more is promoted. | |
| 1238 decr_tenuring_threshold = true; | |
| 1239 set_decrement_tenuring_threshold_for_gc_cost(true); | |
| 1240 } else if (major_cost > minor_cost * _threshold_tolerance_percent) { | |
| 1241 // Major times are too long, so we want less promotion. | |
| 1242 incr_tenuring_threshold = true; | |
| 1243 set_increment_tenuring_threshold_for_gc_cost(true); | |
| 1244 } | |
| 1245 | |
| 1246 } else { | |
| 1247 // Survivor space overflow occurred, so promoted and survived are | |
| 1248 // not accurate. We'll make our best guess by combining survived | |
| 1249 // and promoted and count them as survivors. | |
| 1250 // | |
| 1251 // We'll lower the tenuring threshold to see if we can correct | |
| 1252 // things. Also, set the survivor size conservatively. We're | |
| 1253 // trying to avoid many overflows from occurring if defnew size | |
| 1254 // is just too small. | |
| 1255 | |
| 1256 decr_tenuring_threshold = true; | |
| 1257 } | |
| 1258 | |
| 1259 // The padded average also maintains a deviation from the average; | |
| 1260 // we use this to see how good of an estimate we have of what survived. | |
| 1261 // We're trying to pad the survivor size as little as possible without | |
| 1262 // overflowing the survivor spaces. | |
| 1263 size_t target_size = align_size_up((size_t)_avg_survived->padded_average(), | |
| 1264 generation_alignment()); | |
| 1265 target_size = MAX2(target_size, generation_alignment()); | |
| 1266 | |
| 1267 if (target_size > survivor_limit) { | |
| 1268 // Target size is bigger than we can handle. Let's also reduce | |
| 1269 // the tenuring threshold. | |
| 1270 target_size = survivor_limit; | |
| 1271 decr_tenuring_threshold = true; | |
| 1272 set_decrement_tenuring_threshold_for_survivor_limit(true); | |
| 1273 } | |
| 1274 | |
| 1275 // Finally, increment or decrement the tenuring threshold, as decided above. | |
| 1276 // We test for decrementing first, as we might have hit the target size | |
| 1277 // limit. | |
| 1278 if (decr_tenuring_threshold && !(AlwaysTenure || NeverTenure)) { | |
| 1279 if (tenuring_threshold > 1) { | |
| 1280 tenuring_threshold--; | |
| 1281 } | |
| 1282 } else if (incr_tenuring_threshold && !(AlwaysTenure || NeverTenure)) { | |
| 1283 if (tenuring_threshold < MaxTenuringThreshold) { | |
| 1284 tenuring_threshold++; | |
| 1285 } | |
| 1286 } | |
| 1287 | |
| 1288 // We keep a running average of the amount promoted which is used | |
| 1289 // to decide when we should collect the old generation (when | |
| 1290 // the amount of old gen free space is less than what we expect to | |
| 1291 // promote). | |
| 1292 | |
| 1293 if (PrintAdaptiveSizePolicy) { | |
| 1294 // A little more detail if Verbose is on | |
| 1295 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 1296 if (Verbose) { | |
| 1297 gclog_or_tty->print( " avg_survived: %f" | |
| 1298 " avg_deviation: %f", | |
| 1299 _avg_survived->average(), | |
| 1300 _avg_survived->deviation()); | |
| 1301 } | |
| 1302 | |
| 1303 gclog_or_tty->print( " avg_survived_padded_avg: %f", | |
| 1304 _avg_survived->padded_average()); | |
| 1305 | |
| 1306 if (Verbose) { | |
| 1307 gclog_or_tty->print( " avg_promoted_avg: %f" | |
| 1308 " avg_promoted_dev: %f", | |
| 1309 gch->gc_stats(1)->avg_promoted()->average(), | |
| 1310 gch->gc_stats(1)->avg_promoted()->deviation()); | |
| 1311 } | |
| 1312 | |
| 1313 gclog_or_tty->print( " avg_promoted_padded_avg: %f" | |
| 1314 " avg_pretenured_padded_avg: %f" | |
| 1315 " tenuring_thresh: %d" | |
| 1316 " target_size: " SIZE_FORMAT | |
| 1317 " survivor_limit: " SIZE_FORMAT, | |
| 1318 gch->gc_stats(1)->avg_promoted()->padded_average(), | |
| 1319 _avg_pretenured->padded_average(), | |
| 1320 tenuring_threshold, target_size, survivor_limit); | |
| 1321 gclog_or_tty->cr(); | |
| 1322 } | |
| 1323 | |
| 1324 set_survivor_size(target_size); | |
| 1325 | |
| 1326 return tenuring_threshold; | |
| 1327 } | |
| 1328 | |
| 1329 bool CMSAdaptiveSizePolicy::get_and_clear_first_after_collection() { | |
| 1330 bool result = _first_after_collection; | |
| 1331 _first_after_collection = false; | |
| 1332 return result; | |
| 1333 } | |
| 1334 | |
| 1335 bool CMSAdaptiveSizePolicy::print_adaptive_size_policy_on( | |
| 1336 outputStream* st) const { | |
| 1337 | |
| 1338 if (!UseAdaptiveSizePolicy) return false; | |
| 1339 | |
| 1340 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 1341 Generation* gen0 = gch->get_gen(0); | |
| 1342 DefNewGeneration* def_new = gen0->as_DefNewGeneration(); | |
| 1343 return | |
| 1344 AdaptiveSizePolicy::print_adaptive_size_policy_on( | |
| 1345 st, | |
| 1346 def_new->tenuring_threshold()); | |
| 1347 } |