Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.cpp @ 6818:22b8d3d181d9
8000351: Tenuring threshold should be unsigned
Summary: Change the flags and variables related to tenuring threshold to be unsigned
Reviewed-by: jmasa, johnc
| author | jwilhelm |
|---|---|
| date | Wed, 03 Oct 2012 20:31:41 +0200 |
| parents | f08d439fab8c |
| children | 14d3f71f831d |
| 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 | |
| 3960 | 40 #ifdef TARGET_OS_FAMILY_bsd |
| 41 # include "os_bsd.inline.hpp" | |
| 42 #endif | |
| 0 | 43 elapsedTimer CMSAdaptiveSizePolicy::_concurrent_timer; |
| 44 elapsedTimer CMSAdaptiveSizePolicy::_STW_timer; | |
| 45 | |
| 46 // Defined if the granularity of the time measurements is potentially too large. | |
| 47 #define CLOCK_GRANULARITY_TOO_LARGE | |
| 48 | |
| 49 CMSAdaptiveSizePolicy::CMSAdaptiveSizePolicy(size_t init_eden_size, | |
| 50 size_t init_promo_size, | |
| 51 size_t init_survivor_size, | |
| 52 double max_gc_minor_pause_sec, | |
| 53 double max_gc_pause_sec, | |
| 54 uint gc_cost_ratio) : | |
| 55 AdaptiveSizePolicy(init_eden_size, | |
| 56 init_promo_size, | |
| 57 init_survivor_size, | |
| 58 max_gc_pause_sec, | |
| 59 gc_cost_ratio) { | |
| 60 | |
| 61 clear_internal_time_intervals(); | |
| 62 | |
| 63 _processor_count = os::active_processor_count(); | |
| 64 | |
| 1284 | 65 if (CMSConcurrentMTEnabled && (ConcGCThreads > 1)) { |
| 0 | 66 assert(_processor_count > 0, "Processor count is suspect"); |
| 1284 | 67 _concurrent_processor_count = MIN2((uint) ConcGCThreads, |
| 0 | 68 (uint) _processor_count); |
| 69 } else { | |
| 70 _concurrent_processor_count = 1; | |
| 71 } | |
| 72 | |
| 73 _avg_concurrent_time = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 74 _avg_concurrent_interval = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 75 _avg_concurrent_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 76 | |
| 77 _avg_initial_pause = new AdaptivePaddedAverage(AdaptiveTimeWeight, | |
| 78 PausePadding); | |
| 79 _avg_remark_pause = new AdaptivePaddedAverage(AdaptiveTimeWeight, | |
| 80 PausePadding); | |
| 81 | |
| 82 _avg_cms_STW_time = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 83 _avg_cms_STW_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 84 | |
| 85 _avg_cms_free = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 86 _avg_cms_free_at_sweep = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 87 _avg_cms_promo = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 88 | |
| 89 // Mark-sweep-compact | |
| 90 _avg_msc_pause = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 91 _avg_msc_interval = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 92 _avg_msc_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 93 | |
| 94 // Mark-sweep | |
| 95 _avg_ms_pause = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 96 _avg_ms_interval = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 97 _avg_ms_gc_cost = new AdaptiveWeightedAverage(AdaptiveTimeWeight); | |
| 98 | |
| 99 // Variables that estimate pause times as a function of generation | |
| 100 // size. | |
| 101 _remark_pause_old_estimator = | |
| 102 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 103 _initial_pause_old_estimator = | |
| 104 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 105 _remark_pause_young_estimator = | |
| 106 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 107 _initial_pause_young_estimator = | |
| 108 new LinearLeastSquareFit(AdaptiveSizePolicyWeight); | |
| 109 | |
| 110 // Alignment comes from that used in ReservedSpace. | |
| 111 _generation_alignment = os::vm_allocation_granularity(); | |
| 112 | |
| 113 // Start the concurrent timer here so that the first | |
| 114 // concurrent_phases_begin() measures a finite mutator | |
| 115 // time. A finite mutator time is used to determine | |
| 116 // if a concurrent collection has been started. If this | |
| 117 // proves to be a problem, use some explicit flag to | |
| 118 // signal that a concurrent collection has been started. | |
| 119 _concurrent_timer.start(); | |
| 120 _STW_timer.start(); | |
| 121 } | |
| 122 | |
| 123 double CMSAdaptiveSizePolicy::concurrent_processor_fraction() { | |
| 124 // For now assume no other daemon threads are taking alway | |
| 125 // cpu's from the application. | |
| 126 return ((double) _concurrent_processor_count / (double) _processor_count); | |
| 127 } | |
| 128 | |
| 129 double CMSAdaptiveSizePolicy::concurrent_collection_cost( | |
| 130 double interval_in_seconds) { | |
| 131 // When the precleaning and sweeping phases use multiple | |
| 132 // threads, change one_processor_fraction to | |
| 133 // concurrent_processor_fraction(). | |
| 134 double one_processor_fraction = 1.0 / ((double) processor_count()); | |
| 135 double concurrent_cost = | |
| 136 collection_cost(_latest_cms_concurrent_marking_time_secs, | |
| 137 interval_in_seconds) * concurrent_processor_fraction() + | |
| 138 collection_cost(_latest_cms_concurrent_precleaning_time_secs, | |
| 139 interval_in_seconds) * one_processor_fraction + | |
| 140 collection_cost(_latest_cms_concurrent_sweeping_time_secs, | |
| 141 interval_in_seconds) * one_processor_fraction; | |
| 142 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 143 gclog_or_tty->print_cr( | |
| 144 "\nCMSAdaptiveSizePolicy::scaled_concurrent_collection_cost(%f) " | |
| 145 "_latest_cms_concurrent_marking_cost %f " | |
| 146 "_latest_cms_concurrent_precleaning_cost %f " | |
| 147 "_latest_cms_concurrent_sweeping_cost %f " | |
| 148 "concurrent_processor_fraction %f " | |
| 149 "concurrent_cost %f ", | |
| 150 interval_in_seconds, | |
| 151 collection_cost(_latest_cms_concurrent_marking_time_secs, | |
| 152 interval_in_seconds), | |
| 153 collection_cost(_latest_cms_concurrent_precleaning_time_secs, | |
| 154 interval_in_seconds), | |
| 155 collection_cost(_latest_cms_concurrent_sweeping_time_secs, | |
| 156 interval_in_seconds), | |
| 157 concurrent_processor_fraction(), | |
| 158 concurrent_cost); | |
| 159 } | |
| 160 return concurrent_cost; | |
| 161 } | |
| 162 | |
| 163 double CMSAdaptiveSizePolicy::concurrent_collection_time() { | |
| 164 double latest_cms_sum_concurrent_phases_time_secs = | |
| 165 _latest_cms_concurrent_marking_time_secs + | |
| 166 _latest_cms_concurrent_precleaning_time_secs + | |
| 167 _latest_cms_concurrent_sweeping_time_secs; | |
| 168 return latest_cms_sum_concurrent_phases_time_secs; | |
| 169 } | |
| 170 | |
| 171 double CMSAdaptiveSizePolicy::scaled_concurrent_collection_time() { | |
| 172 // When the precleaning and sweeping phases use multiple | |
| 173 // threads, change one_processor_fraction to | |
| 174 // concurrent_processor_fraction(). | |
| 175 double one_processor_fraction = 1.0 / ((double) processor_count()); | |
| 176 double latest_cms_sum_concurrent_phases_time_secs = | |
| 177 _latest_cms_concurrent_marking_time_secs * concurrent_processor_fraction() + | |
| 178 _latest_cms_concurrent_precleaning_time_secs * one_processor_fraction + | |
| 179 _latest_cms_concurrent_sweeping_time_secs * one_processor_fraction ; | |
| 180 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 181 gclog_or_tty->print_cr( | |
| 182 "\nCMSAdaptiveSizePolicy::scaled_concurrent_collection_time " | |
| 183 "_latest_cms_concurrent_marking_time_secs %f " | |
| 184 "_latest_cms_concurrent_precleaning_time_secs %f " | |
| 185 "_latest_cms_concurrent_sweeping_time_secs %f " | |
| 186 "concurrent_processor_fraction %f " | |
| 187 "latest_cms_sum_concurrent_phases_time_secs %f ", | |
| 188 _latest_cms_concurrent_marking_time_secs, | |
| 189 _latest_cms_concurrent_precleaning_time_secs, | |
| 190 _latest_cms_concurrent_sweeping_time_secs, | |
| 191 concurrent_processor_fraction(), | |
| 192 latest_cms_sum_concurrent_phases_time_secs); | |
| 193 } | |
| 194 return latest_cms_sum_concurrent_phases_time_secs; | |
| 195 } | |
| 196 | |
| 197 void CMSAdaptiveSizePolicy::update_minor_pause_old_estimator( | |
| 198 double minor_pause_in_ms) { | |
| 199 // Get the equivalent of the free space | |
| 200 // that is available for promotions in the CMS generation | |
| 201 // and use that to update _minor_pause_old_estimator | |
| 202 | |
| 203 // Don't implement this until it is needed. A warning is | |
| 204 // printed if _minor_pause_old_estimator is used. | |
| 205 } | |
| 206 | |
| 207 void CMSAdaptiveSizePolicy::concurrent_marking_begin() { | |
| 208 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 209 gclog_or_tty->print(" "); | |
| 210 gclog_or_tty->stamp(); | |
| 211 gclog_or_tty->print(": concurrent_marking_begin "); | |
| 212 } | |
| 213 // Update the interval time | |
| 214 _concurrent_timer.stop(); | |
| 215 _latest_cms_collection_end_to_collection_start_secs = _concurrent_timer.seconds(); | |
| 216 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 217 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_marking_begin: " | |
| 218 "mutator time %f", _latest_cms_collection_end_to_collection_start_secs); | |
| 219 } | |
| 220 _concurrent_timer.reset(); | |
| 221 _concurrent_timer.start(); | |
| 222 } | |
| 223 | |
| 224 void CMSAdaptiveSizePolicy::concurrent_marking_end() { | |
| 225 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 226 gclog_or_tty->stamp(); | |
| 227 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_marking_end()"); | |
| 228 } | |
| 229 | |
| 230 _concurrent_timer.stop(); | |
| 231 _latest_cms_concurrent_marking_time_secs = _concurrent_timer.seconds(); | |
| 232 | |
| 233 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 234 gclog_or_tty->print_cr("\n CMSAdaptiveSizePolicy::concurrent_marking_end" | |
| 235 ":concurrent marking time (s) %f", | |
| 236 _latest_cms_concurrent_marking_time_secs); | |
| 237 } | |
| 238 } | |
| 239 | |
| 240 void CMSAdaptiveSizePolicy::concurrent_precleaning_begin() { | |
| 241 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 242 gclog_or_tty->stamp(); | |
| 243 gclog_or_tty->print_cr( | |
| 244 "CMSAdaptiveSizePolicy::concurrent_precleaning_begin()"); | |
| 245 } | |
| 246 _concurrent_timer.reset(); | |
| 247 _concurrent_timer.start(); | |
| 248 } | |
| 249 | |
| 250 | |
| 251 void CMSAdaptiveSizePolicy::concurrent_precleaning_end() { | |
| 252 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 253 gclog_or_tty->stamp(); | |
| 254 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_precleaning_end()"); | |
| 255 } | |
| 256 | |
| 257 _concurrent_timer.stop(); | |
| 258 // May be set again by a second call during the same collection. | |
| 259 _latest_cms_concurrent_precleaning_time_secs = _concurrent_timer.seconds(); | |
| 260 | |
| 261 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 262 gclog_or_tty->print_cr("\n CMSAdaptiveSizePolicy::concurrent_precleaning_end" | |
| 263 ":concurrent precleaning time (s) %f", | |
| 264 _latest_cms_concurrent_precleaning_time_secs); | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 void CMSAdaptiveSizePolicy::concurrent_sweeping_begin() { | |
| 269 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 270 gclog_or_tty->stamp(); | |
| 271 gclog_or_tty->print_cr( | |
| 272 "CMSAdaptiveSizePolicy::concurrent_sweeping_begin()"); | |
| 273 } | |
| 274 _concurrent_timer.reset(); | |
| 275 _concurrent_timer.start(); | |
| 276 } | |
| 277 | |
| 278 | |
| 279 void CMSAdaptiveSizePolicy::concurrent_sweeping_end() { | |
| 280 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 281 gclog_or_tty->stamp(); | |
| 282 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_sweeping_end()"); | |
| 283 } | |
| 284 | |
| 285 _concurrent_timer.stop(); | |
| 286 _latest_cms_concurrent_sweeping_time_secs = _concurrent_timer.seconds(); | |
| 287 | |
| 288 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 289 gclog_or_tty->print_cr("\n CMSAdaptiveSizePolicy::concurrent_sweeping_end" | |
| 290 ":concurrent sweeping time (s) %f", | |
| 291 _latest_cms_concurrent_sweeping_time_secs); | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 void CMSAdaptiveSizePolicy::concurrent_phases_end(GCCause::Cause gc_cause, | |
| 296 size_t cur_eden, | |
| 297 size_t cur_promo) { | |
| 298 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 299 gclog_or_tty->print(" "); | |
| 300 gclog_or_tty->stamp(); | |
| 301 gclog_or_tty->print(": concurrent_phases_end "); | |
| 302 } | |
| 303 | |
| 304 // Update the concurrent timer | |
| 305 _concurrent_timer.stop(); | |
| 306 | |
| 307 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 308 UseAdaptiveSizePolicyWithSystemGC) { | |
| 309 | |
| 310 avg_cms_free()->sample(cur_promo); | |
| 311 double latest_cms_sum_concurrent_phases_time_secs = | |
| 312 concurrent_collection_time(); | |
| 313 | |
| 314 _avg_concurrent_time->sample(latest_cms_sum_concurrent_phases_time_secs); | |
| 315 | |
| 316 // Cost of collection (unit-less) | |
| 317 | |
| 318 // Total interval for collection. May not be valid. Tests | |
| 319 // below determine whether to use this. | |
| 320 // | |
| 321 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 322 gclog_or_tty->print_cr("\nCMSAdaptiveSizePolicy::concurrent_phases_end \n" | |
| 323 "_latest_cms_reset_end_to_initial_mark_start_secs %f \n" | |
| 324 "_latest_cms_initial_mark_start_to_end_time_secs %f \n" | |
| 325 "_latest_cms_remark_start_to_end_time_secs %f \n" | |
| 326 "_latest_cms_concurrent_marking_time_secs %f \n" | |
| 327 "_latest_cms_concurrent_precleaning_time_secs %f \n" | |
| 328 "_latest_cms_concurrent_sweeping_time_secs %f \n" | |
| 329 "latest_cms_sum_concurrent_phases_time_secs %f \n" | |
| 330 "_latest_cms_collection_end_to_collection_start_secs %f \n" | |
| 331 "concurrent_processor_fraction %f", | |
| 332 _latest_cms_reset_end_to_initial_mark_start_secs, | |
| 333 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 334 _latest_cms_remark_start_to_end_time_secs, | |
| 335 _latest_cms_concurrent_marking_time_secs, | |
| 336 _latest_cms_concurrent_precleaning_time_secs, | |
| 337 _latest_cms_concurrent_sweeping_time_secs, | |
| 338 latest_cms_sum_concurrent_phases_time_secs, | |
| 339 _latest_cms_collection_end_to_collection_start_secs, | |
| 340 concurrent_processor_fraction()); | |
| 341 } | |
| 342 double interval_in_seconds = | |
| 343 _latest_cms_initial_mark_start_to_end_time_secs + | |
| 344 _latest_cms_remark_start_to_end_time_secs + | |
| 345 latest_cms_sum_concurrent_phases_time_secs + | |
| 346 _latest_cms_collection_end_to_collection_start_secs; | |
| 347 assert(interval_in_seconds >= 0.0, | |
| 348 "Bad interval between cms collections"); | |
| 349 | |
| 350 // Sample for performance counter | |
| 351 avg_concurrent_interval()->sample(interval_in_seconds); | |
| 352 | |
| 353 // STW costs (initial and remark pauses) | |
| 354 // Cost of collection (unit-less) | |
| 355 assert(_latest_cms_initial_mark_start_to_end_time_secs >= 0.0, | |
| 356 "Bad initial mark pause"); | |
| 357 assert(_latest_cms_remark_start_to_end_time_secs >= 0.0, | |
| 358 "Bad remark pause"); | |
| 359 double STW_time_in_seconds = | |
| 360 _latest_cms_initial_mark_start_to_end_time_secs + | |
| 361 _latest_cms_remark_start_to_end_time_secs; | |
| 362 double STW_collection_cost = 0.0; | |
| 363 if (interval_in_seconds > 0.0) { | |
| 364 // cost for the STW phases of the concurrent collection. | |
| 365 STW_collection_cost = STW_time_in_seconds / interval_in_seconds; | |
| 366 avg_cms_STW_gc_cost()->sample(STW_collection_cost); | |
| 367 } | |
| 368 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 369 gclog_or_tty->print("cmsAdaptiveSizePolicy::STW_collection_end: " | |
| 370 "STW gc cost: %f average: %f", STW_collection_cost, | |
| 371 avg_cms_STW_gc_cost()->average()); | |
| 372 gclog_or_tty->print_cr(" STW pause: %f (ms) STW period %f (ms)", | |
| 373 (double) STW_time_in_seconds * MILLIUNITS, | |
| 374 (double) interval_in_seconds * MILLIUNITS); | |
| 375 } | |
| 376 | |
| 377 double concurrent_cost = 0.0; | |
| 378 if (latest_cms_sum_concurrent_phases_time_secs > 0.0) { | |
| 379 concurrent_cost = concurrent_collection_cost(interval_in_seconds); | |
| 380 | |
| 381 avg_concurrent_gc_cost()->sample(concurrent_cost); | |
| 382 // Average this ms cost into all the other types gc costs | |
| 383 | |
| 384 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 385 gclog_or_tty->print("cmsAdaptiveSizePolicy::concurrent_phases_end: " | |
| 386 "concurrent gc cost: %f average: %f", | |
| 387 concurrent_cost, | |
| 388 _avg_concurrent_gc_cost->average()); | |
| 389 gclog_or_tty->print_cr(" concurrent time: %f (ms) cms period %f (ms)" | |
| 390 " processor fraction: %f", | |
| 391 latest_cms_sum_concurrent_phases_time_secs * MILLIUNITS, | |
| 392 interval_in_seconds * MILLIUNITS, | |
| 393 concurrent_processor_fraction()); | |
| 394 } | |
| 395 } | |
| 396 double total_collection_cost = STW_collection_cost + concurrent_cost; | |
| 397 avg_major_gc_cost()->sample(total_collection_cost); | |
| 398 | |
| 399 // Gather information for estimating future behavior | |
| 400 double initial_pause_in_ms = _latest_cms_initial_mark_start_to_end_time_secs * MILLIUNITS; | |
| 401 double remark_pause_in_ms = _latest_cms_remark_start_to_end_time_secs * MILLIUNITS; | |
| 402 | |
| 403 double cur_promo_size_in_mbytes = ((double)cur_promo)/((double)M); | |
| 404 initial_pause_old_estimator()->update(cur_promo_size_in_mbytes, | |
| 405 initial_pause_in_ms); | |
| 406 remark_pause_old_estimator()->update(cur_promo_size_in_mbytes, | |
| 407 remark_pause_in_ms); | |
| 408 major_collection_estimator()->update(cur_promo_size_in_mbytes, | |
| 409 total_collection_cost); | |
| 410 | |
| 411 // This estimate uses the average eden size. It could also | |
| 412 // have used the latest eden size. Which is better? | |
| 413 double cur_eden_size_in_mbytes = ((double)cur_eden)/((double) M); | |
| 414 initial_pause_young_estimator()->update(cur_eden_size_in_mbytes, | |
| 415 initial_pause_in_ms); | |
| 416 remark_pause_young_estimator()->update(cur_eden_size_in_mbytes, | |
| 417 remark_pause_in_ms); | |
| 418 } | |
| 419 | |
| 420 clear_internal_time_intervals(); | |
| 421 | |
| 422 set_first_after_collection(); | |
| 423 | |
| 424 // The concurrent phases keeps track of it's own mutator interval | |
| 425 // with this timer. This allows the stop-the-world phase to | |
| 426 // be included in the mutator time so that the stop-the-world time | |
| 427 // is not double counted. Reset and start it. | |
| 428 _concurrent_timer.reset(); | |
| 429 _concurrent_timer.start(); | |
| 430 | |
| 431 // The mutator time between STW phases does not include the | |
| 432 // concurrent collection time. | |
| 433 _STW_timer.reset(); | |
| 434 _STW_timer.start(); | |
| 435 } | |
| 436 | |
| 437 void CMSAdaptiveSizePolicy::checkpoint_roots_initial_begin() { | |
| 438 // Update the interval time | |
| 439 _STW_timer.stop(); | |
| 440 _latest_cms_reset_end_to_initial_mark_start_secs = _STW_timer.seconds(); | |
| 441 // Reset for the initial mark | |
| 442 _STW_timer.reset(); | |
| 443 _STW_timer.start(); | |
| 444 } | |
| 445 | |
| 446 void CMSAdaptiveSizePolicy::checkpoint_roots_initial_end( | |
| 447 GCCause::Cause gc_cause) { | |
| 448 _STW_timer.stop(); | |
| 449 | |
| 450 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 451 UseAdaptiveSizePolicyWithSystemGC) { | |
| 452 _latest_cms_initial_mark_start_to_end_time_secs = _STW_timer.seconds(); | |
| 453 avg_initial_pause()->sample(_latest_cms_initial_mark_start_to_end_time_secs); | |
| 454 | |
| 455 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 456 gclog_or_tty->print( | |
| 457 "cmsAdaptiveSizePolicy::checkpoint_roots_initial_end: " | |
| 458 "initial pause: %f ", _latest_cms_initial_mark_start_to_end_time_secs); | |
| 459 } | |
| 460 } | |
| 461 | |
| 462 _STW_timer.reset(); | |
| 463 _STW_timer.start(); | |
| 464 } | |
| 465 | |
| 466 void CMSAdaptiveSizePolicy::checkpoint_roots_final_begin() { | |
| 467 _STW_timer.stop(); | |
| 468 _latest_cms_initial_mark_end_to_remark_start_secs = _STW_timer.seconds(); | |
| 469 // Start accumumlating time for the remark in the STW timer. | |
| 470 _STW_timer.reset(); | |
| 471 _STW_timer.start(); | |
| 472 } | |
| 473 | |
| 474 void CMSAdaptiveSizePolicy::checkpoint_roots_final_end( | |
| 475 GCCause::Cause gc_cause) { | |
| 476 _STW_timer.stop(); | |
| 477 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 478 UseAdaptiveSizePolicyWithSystemGC) { | |
| 479 // Total initial mark pause + remark pause. | |
| 480 _latest_cms_remark_start_to_end_time_secs = _STW_timer.seconds(); | |
| 481 double STW_time_in_seconds = _latest_cms_initial_mark_start_to_end_time_secs + | |
| 482 _latest_cms_remark_start_to_end_time_secs; | |
| 483 double STW_time_in_ms = STW_time_in_seconds * MILLIUNITS; | |
| 484 | |
| 485 avg_remark_pause()->sample(_latest_cms_remark_start_to_end_time_secs); | |
| 486 | |
| 487 // Sample total for initial mark + remark | |
| 488 avg_cms_STW_time()->sample(STW_time_in_seconds); | |
| 489 | |
| 490 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 491 gclog_or_tty->print("cmsAdaptiveSizePolicy::checkpoint_roots_final_end: " | |
| 492 "remark pause: %f", _latest_cms_remark_start_to_end_time_secs); | |
| 493 } | |
| 494 | |
| 495 } | |
| 496 // Don't start the STW times here because the concurrent | |
| 497 // sweep and reset has not happened. | |
| 498 // Keep the old comment above in case I don't understand | |
| 499 // what is going on but now | |
| 500 // Start the STW timer because it is used by ms_collection_begin() | |
| 501 // and ms_collection_end() to get the sweep time if a MS is being | |
| 502 // done in the foreground. | |
| 503 _STW_timer.reset(); | |
| 504 _STW_timer.start(); | |
| 505 } | |
| 506 | |
| 507 void CMSAdaptiveSizePolicy::msc_collection_begin() { | |
| 508 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 509 gclog_or_tty->print(" "); | |
| 510 gclog_or_tty->stamp(); | |
| 511 gclog_or_tty->print(": msc_collection_begin "); | |
| 512 } | |
| 513 _STW_timer.stop(); | |
| 514 _latest_cms_msc_end_to_msc_start_time_secs = _STW_timer.seconds(); | |
| 515 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 516 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::msc_collection_begin: " | |
| 517 "mutator time %f", | |
| 518 _latest_cms_msc_end_to_msc_start_time_secs); | |
| 519 } | |
| 520 avg_msc_interval()->sample(_latest_cms_msc_end_to_msc_start_time_secs); | |
| 521 _STW_timer.reset(); | |
| 522 _STW_timer.start(); | |
| 523 } | |
| 524 | |
| 525 void CMSAdaptiveSizePolicy::msc_collection_end(GCCause::Cause gc_cause) { | |
| 526 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 527 gclog_or_tty->print(" "); | |
| 528 gclog_or_tty->stamp(); | |
| 529 gclog_or_tty->print(": msc_collection_end "); | |
| 530 } | |
| 531 _STW_timer.stop(); | |
| 532 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 533 UseAdaptiveSizePolicyWithSystemGC) { | |
| 534 double msc_pause_in_seconds = _STW_timer.seconds(); | |
| 535 if ((_latest_cms_msc_end_to_msc_start_time_secs > 0.0) && | |
| 536 (msc_pause_in_seconds > 0.0)) { | |
| 537 avg_msc_pause()->sample(msc_pause_in_seconds); | |
| 538 double mutator_time_in_seconds = 0.0; | |
| 539 if (_latest_cms_collection_end_to_collection_start_secs == 0.0) { | |
| 540 // This assertion may fail because of time stamp gradularity. | |
| 541 // Comment it out and investiage it at a later time. The large | |
| 542 // time stamp granularity occurs on some older linux systems. | |
| 543 #ifndef CLOCK_GRANULARITY_TOO_LARGE | |
| 544 assert((_latest_cms_concurrent_marking_time_secs == 0.0) && | |
| 545 (_latest_cms_concurrent_precleaning_time_secs == 0.0) && | |
| 546 (_latest_cms_concurrent_sweeping_time_secs == 0.0), | |
| 547 "There should not be any concurrent time"); | |
| 548 #endif | |
| 549 // A concurrent collection did not start. Mutator time | |
| 550 // between collections comes from the STW MSC timer. | |
| 551 mutator_time_in_seconds = _latest_cms_msc_end_to_msc_start_time_secs; | |
| 552 } else { | |
| 553 // The concurrent collection did start so count the mutator | |
| 554 // time to the start of the concurrent collection. In this | |
| 555 // case the _latest_cms_msc_end_to_msc_start_time_secs measures | |
| 556 // the time between the initial mark or remark and the | |
| 557 // start of the MSC. That has no real meaning. | |
| 558 mutator_time_in_seconds = _latest_cms_collection_end_to_collection_start_secs; | |
| 559 } | |
| 560 | |
| 561 double latest_cms_sum_concurrent_phases_time_secs = | |
| 562 concurrent_collection_time(); | |
| 563 double interval_in_seconds = | |
| 564 mutator_time_in_seconds + | |
| 565 _latest_cms_initial_mark_start_to_end_time_secs + | |
| 566 _latest_cms_remark_start_to_end_time_secs + | |
| 567 latest_cms_sum_concurrent_phases_time_secs + | |
| 568 msc_pause_in_seconds; | |
| 569 | |
| 570 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 571 gclog_or_tty->print_cr(" interval_in_seconds %f \n" | |
| 572 " mutator_time_in_seconds %f \n" | |
| 573 " _latest_cms_initial_mark_start_to_end_time_secs %f\n" | |
| 574 " _latest_cms_remark_start_to_end_time_secs %f\n" | |
| 575 " latest_cms_sum_concurrent_phases_time_secs %f\n" | |
| 576 " msc_pause_in_seconds %f\n", | |
| 577 interval_in_seconds, | |
| 578 mutator_time_in_seconds, | |
| 579 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 580 _latest_cms_remark_start_to_end_time_secs, | |
| 581 latest_cms_sum_concurrent_phases_time_secs, | |
| 582 msc_pause_in_seconds); | |
| 583 } | |
| 584 | |
| 585 // The concurrent cost is wasted cost but it should be | |
| 586 // included. | |
| 587 double concurrent_cost = concurrent_collection_cost(interval_in_seconds); | |
| 588 | |
| 589 // Initial mark and remark, also wasted. | |
| 590 double STW_time_in_seconds = _latest_cms_initial_mark_start_to_end_time_secs + | |
| 591 _latest_cms_remark_start_to_end_time_secs; | |
| 592 double STW_collection_cost = | |
| 593 collection_cost(STW_time_in_seconds, interval_in_seconds) + | |
| 594 concurrent_cost; | |
| 595 | |
| 596 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 597 gclog_or_tty->print_cr(" msc_collection_end:\n" | |
| 598 "_latest_cms_collection_end_to_collection_start_secs %f\n" | |
| 599 "_latest_cms_msc_end_to_msc_start_time_secs %f\n" | |
| 600 "_latest_cms_initial_mark_start_to_end_time_secs %f\n" | |
| 601 "_latest_cms_remark_start_to_end_time_secs %f\n" | |
| 602 "latest_cms_sum_concurrent_phases_time_secs %f\n", | |
| 603 _latest_cms_collection_end_to_collection_start_secs, | |
| 604 _latest_cms_msc_end_to_msc_start_time_secs, | |
| 605 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 606 _latest_cms_remark_start_to_end_time_secs, | |
| 607 latest_cms_sum_concurrent_phases_time_secs); | |
| 608 | |
| 609 gclog_or_tty->print_cr(" msc_collection_end: \n" | |
| 610 "latest_cms_sum_concurrent_phases_time_secs %f\n" | |
| 611 "STW_time_in_seconds %f\n" | |
| 612 "msc_pause_in_seconds %f\n", | |
| 613 latest_cms_sum_concurrent_phases_time_secs, | |
| 614 STW_time_in_seconds, | |
| 615 msc_pause_in_seconds); | |
| 616 } | |
| 617 | |
| 618 double cost = concurrent_cost + STW_collection_cost + | |
| 619 collection_cost(msc_pause_in_seconds, interval_in_seconds); | |
| 620 | |
| 621 _avg_msc_gc_cost->sample(cost); | |
| 622 | |
| 623 // Average this ms cost into all the other types gc costs | |
| 624 avg_major_gc_cost()->sample(cost); | |
| 625 | |
| 626 // Sample for performance counter | |
| 627 _avg_msc_interval->sample(interval_in_seconds); | |
| 628 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 629 gclog_or_tty->print("cmsAdaptiveSizePolicy::msc_collection_end: " | |
| 630 "MSC gc cost: %f average: %f", cost, | |
| 631 _avg_msc_gc_cost->average()); | |
| 632 | |
| 633 double msc_pause_in_ms = msc_pause_in_seconds * MILLIUNITS; | |
| 634 gclog_or_tty->print_cr(" MSC pause: %f (ms) MSC period %f (ms)", | |
| 635 msc_pause_in_ms, (double) interval_in_seconds * MILLIUNITS); | |
| 636 } | |
| 637 } | |
| 638 } | |
| 639 | |
| 640 clear_internal_time_intervals(); | |
| 641 | |
| 642 // Can this call be put into the epilogue? | |
| 643 set_first_after_collection(); | |
| 644 | |
| 645 // The concurrent phases keeps track of it's own mutator interval | |
| 646 // with this timer. This allows the stop-the-world phase to | |
| 647 // be included in the mutator time so that the stop-the-world time | |
| 648 // is not double counted. Reset and start it. | |
| 649 _concurrent_timer.stop(); | |
| 650 _concurrent_timer.reset(); | |
| 651 _concurrent_timer.start(); | |
| 652 | |
| 653 _STW_timer.reset(); | |
| 654 _STW_timer.start(); | |
| 655 } | |
| 656 | |
| 657 void CMSAdaptiveSizePolicy::ms_collection_begin() { | |
| 658 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 659 gclog_or_tty->print(" "); | |
| 660 gclog_or_tty->stamp(); | |
| 661 gclog_or_tty->print(": ms_collection_begin "); | |
| 662 } | |
| 663 _STW_timer.stop(); | |
| 664 _latest_cms_ms_end_to_ms_start = _STW_timer.seconds(); | |
| 665 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 666 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::ms_collection_begin: " | |
| 667 "mutator time %f", | |
| 668 _latest_cms_ms_end_to_ms_start); | |
| 669 } | |
| 670 avg_ms_interval()->sample(_STW_timer.seconds()); | |
| 671 _STW_timer.reset(); | |
| 672 _STW_timer.start(); | |
| 673 } | |
| 674 | |
| 675 void CMSAdaptiveSizePolicy::ms_collection_end(GCCause::Cause gc_cause) { | |
| 676 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 677 gclog_or_tty->print(" "); | |
| 678 gclog_or_tty->stamp(); | |
| 679 gclog_or_tty->print(": ms_collection_end "); | |
| 680 } | |
| 681 _STW_timer.stop(); | |
| 682 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 683 UseAdaptiveSizePolicyWithSystemGC) { | |
| 684 // The MS collection is a foreground collection that does all | |
| 685 // the parts of a mostly concurrent collection. | |
| 686 // | |
| 687 // For this collection include the cost of the | |
| 688 // initial mark | |
| 689 // remark | |
| 690 // all concurrent time (scaled down by the | |
| 691 // concurrent_processor_fraction). Some | |
| 692 // may be zero if the baton was passed before | |
| 693 // it was reached. | |
| 694 // concurrent marking | |
| 695 // sweeping | |
| 696 // resetting | |
| 697 // STW after baton was passed (STW_in_foreground_in_seconds) | |
| 698 double STW_in_foreground_in_seconds = _STW_timer.seconds(); | |
| 699 | |
| 700 double latest_cms_sum_concurrent_phases_time_secs = | |
| 701 concurrent_collection_time(); | |
| 702 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 703 gclog_or_tty->print_cr("\nCMSAdaptiveSizePolicy::ms_collecton_end " | |
| 704 "STW_in_foreground_in_seconds %f " | |
| 705 "_latest_cms_initial_mark_start_to_end_time_secs %f " | |
| 706 "_latest_cms_remark_start_to_end_time_secs %f " | |
| 707 "latest_cms_sum_concurrent_phases_time_secs %f " | |
| 708 "_latest_cms_ms_marking_start_to_end_time_secs %f " | |
| 709 "_latest_cms_ms_end_to_ms_start %f", | |
| 710 STW_in_foreground_in_seconds, | |
| 711 _latest_cms_initial_mark_start_to_end_time_secs, | |
| 712 _latest_cms_remark_start_to_end_time_secs, | |
| 713 latest_cms_sum_concurrent_phases_time_secs, | |
| 714 _latest_cms_ms_marking_start_to_end_time_secs, | |
| 715 _latest_cms_ms_end_to_ms_start); | |
| 716 } | |
| 717 | |
| 718 double STW_marking_in_seconds = _latest_cms_initial_mark_start_to_end_time_secs + | |
| 719 _latest_cms_remark_start_to_end_time_secs; | |
| 720 #ifndef CLOCK_GRANULARITY_TOO_LARGE | |
| 721 assert(_latest_cms_ms_marking_start_to_end_time_secs == 0.0 || | |
| 722 latest_cms_sum_concurrent_phases_time_secs == 0.0, | |
| 723 "marking done twice?"); | |
| 724 #endif | |
| 725 double ms_time_in_seconds = STW_marking_in_seconds + | |
| 726 STW_in_foreground_in_seconds + | |
| 727 _latest_cms_ms_marking_start_to_end_time_secs + | |
| 728 scaled_concurrent_collection_time(); | |
| 729 avg_ms_pause()->sample(ms_time_in_seconds); | |
| 730 // Use the STW costs from the initial mark and remark plus | |
| 731 // the cost of the concurrent phase to calculate a | |
| 732 // collection cost. | |
| 733 double cost = 0.0; | |
| 734 if ((_latest_cms_ms_end_to_ms_start > 0.0) && | |
| 735 (ms_time_in_seconds > 0.0)) { | |
| 736 double interval_in_seconds = | |
| 737 _latest_cms_ms_end_to_ms_start + ms_time_in_seconds; | |
| 738 | |
| 739 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 740 gclog_or_tty->print_cr("\n ms_time_in_seconds %f " | |
| 741 "latest_cms_sum_concurrent_phases_time_secs %f " | |
| 742 "interval_in_seconds %f", | |
| 743 ms_time_in_seconds, | |
| 744 latest_cms_sum_concurrent_phases_time_secs, | |
| 745 interval_in_seconds); | |
| 746 } | |
| 747 | |
| 748 cost = collection_cost(ms_time_in_seconds, interval_in_seconds); | |
| 749 | |
| 750 _avg_ms_gc_cost->sample(cost); | |
| 751 // Average this ms cost into all the other types gc costs | |
| 752 avg_major_gc_cost()->sample(cost); | |
| 753 | |
| 754 // Sample for performance counter | |
| 755 _avg_ms_interval->sample(interval_in_seconds); | |
| 756 } | |
| 757 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 758 gclog_or_tty->print("cmsAdaptiveSizePolicy::ms_collection_end: " | |
| 759 "MS gc cost: %f average: %f", cost, _avg_ms_gc_cost->average()); | |
| 760 | |
| 761 double ms_time_in_ms = ms_time_in_seconds * MILLIUNITS; | |
| 762 gclog_or_tty->print_cr(" MS pause: %f (ms) MS period %f (ms)", | |
| 763 ms_time_in_ms, | |
| 764 _latest_cms_ms_end_to_ms_start * MILLIUNITS); | |
| 765 } | |
| 766 } | |
| 767 | |
| 768 // Consider putting this code (here to end) into a | |
| 769 // method for convenience. | |
| 770 clear_internal_time_intervals(); | |
| 771 | |
| 772 set_first_after_collection(); | |
| 773 | |
| 774 // The concurrent phases keeps track of it's own mutator interval | |
| 775 // with this timer. This allows the stop-the-world phase to | |
| 776 // be included in the mutator time so that the stop-the-world time | |
| 777 // is not double counted. Reset and start it. | |
| 778 _concurrent_timer.stop(); | |
| 779 _concurrent_timer.reset(); | |
| 780 _concurrent_timer.start(); | |
| 781 | |
| 782 _STW_timer.reset(); | |
| 783 _STW_timer.start(); | |
| 784 } | |
| 785 | |
| 786 void CMSAdaptiveSizePolicy::clear_internal_time_intervals() { | |
| 787 _latest_cms_reset_end_to_initial_mark_start_secs = 0.0; | |
| 788 _latest_cms_initial_mark_end_to_remark_start_secs = 0.0; | |
| 789 _latest_cms_collection_end_to_collection_start_secs = 0.0; | |
| 790 _latest_cms_concurrent_marking_time_secs = 0.0; | |
| 791 _latest_cms_concurrent_precleaning_time_secs = 0.0; | |
| 792 _latest_cms_concurrent_sweeping_time_secs = 0.0; | |
| 793 _latest_cms_msc_end_to_msc_start_time_secs = 0.0; | |
| 794 _latest_cms_ms_end_to_ms_start = 0.0; | |
| 795 _latest_cms_remark_start_to_end_time_secs = 0.0; | |
| 796 _latest_cms_initial_mark_start_to_end_time_secs = 0.0; | |
| 797 _latest_cms_ms_marking_start_to_end_time_secs = 0.0; | |
| 798 } | |
| 799 | |
| 800 void CMSAdaptiveSizePolicy::clear_generation_free_space_flags() { | |
| 801 AdaptiveSizePolicy::clear_generation_free_space_flags(); | |
| 802 | |
| 803 set_change_young_gen_for_maj_pauses(0); | |
| 804 } | |
| 805 | |
| 806 void CMSAdaptiveSizePolicy::concurrent_phases_resume() { | |
| 807 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 808 gclog_or_tty->stamp(); | |
| 809 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::concurrent_phases_resume()"); | |
| 810 } | |
| 811 _concurrent_timer.start(); | |
| 812 } | |
| 813 | |
| 814 double CMSAdaptiveSizePolicy::time_since_major_gc() const { | |
| 815 _concurrent_timer.stop(); | |
| 816 double time_since_cms_gc = _concurrent_timer.seconds(); | |
| 817 _concurrent_timer.start(); | |
| 818 _STW_timer.stop(); | |
| 819 double time_since_STW_gc = _STW_timer.seconds(); | |
| 820 _STW_timer.start(); | |
| 821 | |
| 822 return MIN2(time_since_cms_gc, time_since_STW_gc); | |
| 823 } | |
| 824 | |
| 825 double CMSAdaptiveSizePolicy::major_gc_interval_average_for_decay() const { | |
| 826 double cms_interval = _avg_concurrent_interval->average(); | |
| 827 double msc_interval = _avg_msc_interval->average(); | |
| 828 double ms_interval = _avg_ms_interval->average(); | |
| 829 | |
| 830 return MAX3(cms_interval, msc_interval, ms_interval); | |
| 831 } | |
| 832 | |
| 833 double CMSAdaptiveSizePolicy::cms_gc_cost() const { | |
| 834 return avg_major_gc_cost()->average(); | |
| 835 } | |
| 836 | |
| 837 void CMSAdaptiveSizePolicy::ms_collection_marking_begin() { | |
| 838 _STW_timer.stop(); | |
| 839 // Start accumumlating time for the marking in the STW timer. | |
| 840 _STW_timer.reset(); | |
| 841 _STW_timer.start(); | |
| 842 } | |
| 843 | |
| 844 void CMSAdaptiveSizePolicy::ms_collection_marking_end( | |
| 845 GCCause::Cause gc_cause) { | |
| 846 _STW_timer.stop(); | |
| 847 if (gc_cause != GCCause::_java_lang_system_gc || | |
| 848 UseAdaptiveSizePolicyWithSystemGC) { | |
| 849 _latest_cms_ms_marking_start_to_end_time_secs = _STW_timer.seconds(); | |
| 850 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 851 gclog_or_tty->print_cr("CMSAdaptiveSizePolicy::" | |
| 852 "msc_collection_marking_end: mutator time %f", | |
| 853 _latest_cms_ms_marking_start_to_end_time_secs); | |
| 854 } | |
| 855 } | |
| 856 _STW_timer.reset(); | |
| 857 _STW_timer.start(); | |
| 858 } | |
| 859 | |
| 860 double CMSAdaptiveSizePolicy::gc_cost() const { | |
| 861 double cms_gen_cost = cms_gc_cost(); | |
| 862 double result = MIN2(1.0, minor_gc_cost() + cms_gen_cost); | |
| 863 assert(result >= 0.0, "Both minor and major costs are non-negative"); | |
| 864 return result; | |
| 865 } | |
| 866 | |
| 867 // Cost of collection (unit-less) | |
| 868 double CMSAdaptiveSizePolicy::collection_cost(double pause_in_seconds, | |
| 869 double interval_in_seconds) { | |
| 870 // Cost of collection (unit-less) | |
| 871 double cost = 0.0; | |
| 872 if ((interval_in_seconds > 0.0) && | |
| 873 (pause_in_seconds > 0.0)) { | |
| 874 cost = | |
| 875 pause_in_seconds / interval_in_seconds; | |
| 876 } | |
| 877 return cost; | |
| 878 } | |
| 879 | |
| 880 size_t CMSAdaptiveSizePolicy::adjust_eden_for_pause_time(size_t cur_eden) { | |
| 881 size_t change = 0; | |
| 882 size_t desired_eden = cur_eden; | |
| 883 | |
| 884 // reduce eden size | |
| 885 change = eden_decrement_aligned_down(cur_eden); | |
| 886 desired_eden = cur_eden - change; | |
| 887 | |
| 888 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 889 gclog_or_tty->print_cr( | |
| 890 "CMSAdaptiveSizePolicy::adjust_eden_for_pause_time " | |
| 891 "adjusting eden for pause time. " | |
| 892 " starting eden size " SIZE_FORMAT | |
| 893 " reduced eden size " SIZE_FORMAT | |
| 894 " eden delta " SIZE_FORMAT, | |
| 895 cur_eden, desired_eden, change); | |
| 896 } | |
| 897 | |
| 898 return desired_eden; | |
| 899 } | |
| 900 | |
| 901 size_t CMSAdaptiveSizePolicy::adjust_eden_for_throughput(size_t cur_eden) { | |
| 902 | |
| 903 size_t desired_eden = cur_eden; | |
| 904 | |
| 905 set_change_young_gen_for_throughput(increase_young_gen_for_througput_true); | |
| 906 | |
| 907 size_t change = eden_increment_aligned_up(cur_eden); | |
| 908 size_t scaled_change = scale_by_gen_gc_cost(change, minor_gc_cost()); | |
| 909 | |
| 910 if (cur_eden + scaled_change > cur_eden) { | |
| 911 desired_eden = cur_eden + scaled_change; | |
| 912 } | |
| 913 | |
| 914 _young_gen_change_for_minor_throughput++; | |
| 915 | |
| 916 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 917 gclog_or_tty->print_cr( | |
| 918 "CMSAdaptiveSizePolicy::adjust_eden_for_throughput " | |
| 919 "adjusting eden for throughput. " | |
| 920 " starting eden size " SIZE_FORMAT | |
| 921 " increased eden size " SIZE_FORMAT | |
| 922 " eden delta " SIZE_FORMAT, | |
| 923 cur_eden, desired_eden, scaled_change); | |
| 924 } | |
| 925 | |
| 926 return desired_eden; | |
| 927 } | |
| 928 | |
| 929 size_t CMSAdaptiveSizePolicy::adjust_eden_for_footprint(size_t cur_eden) { | |
| 930 | |
| 931 set_decrease_for_footprint(decrease_young_gen_for_footprint_true); | |
| 932 | |
| 933 size_t change = eden_decrement(cur_eden); | |
| 934 size_t desired_eden_size = cur_eden - change; | |
| 935 | |
| 936 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 937 gclog_or_tty->print_cr( | |
| 938 "CMSAdaptiveSizePolicy::adjust_eden_for_footprint " | |
| 939 "adjusting eden for footprint. " | |
| 940 " starting eden size " SIZE_FORMAT | |
| 941 " reduced eden size " SIZE_FORMAT | |
| 942 " eden delta " SIZE_FORMAT, | |
| 943 cur_eden, desired_eden_size, change); | |
| 944 } | |
| 945 return desired_eden_size; | |
| 946 } | |
| 947 | |
| 948 // The eden and promo versions should be combined if possible. | |
| 949 // They are the same except that the sizes of the decrement | |
| 950 // and increment are different for eden and promo. | |
| 951 size_t CMSAdaptiveSizePolicy::eden_decrement_aligned_down(size_t cur_eden) { | |
| 952 size_t delta = eden_decrement(cur_eden); | |
| 953 return align_size_down(delta, generation_alignment()); | |
| 954 } | |
| 955 | |
| 956 size_t CMSAdaptiveSizePolicy::eden_increment_aligned_up(size_t cur_eden) { | |
| 957 size_t delta = eden_increment(cur_eden); | |
| 958 return align_size_up(delta, generation_alignment()); | |
| 959 } | |
| 960 | |
| 961 size_t CMSAdaptiveSizePolicy::promo_decrement_aligned_down(size_t cur_promo) { | |
| 962 size_t delta = promo_decrement(cur_promo); | |
| 963 return align_size_down(delta, generation_alignment()); | |
| 964 } | |
| 965 | |
| 966 size_t CMSAdaptiveSizePolicy::promo_increment_aligned_up(size_t cur_promo) { | |
| 967 size_t delta = promo_increment(cur_promo); | |
| 968 return align_size_up(delta, generation_alignment()); | |
| 969 } | |
| 970 | |
| 971 | |
| 972 void CMSAdaptiveSizePolicy::compute_young_generation_free_space(size_t cur_eden, | |
| 973 size_t max_eden_size) | |
| 974 { | |
| 975 size_t desired_eden_size = cur_eden; | |
| 976 size_t eden_limit = max_eden_size; | |
| 977 | |
| 978 // Printout input | |
| 979 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 980 gclog_or_tty->print_cr( | |
| 981 "CMSAdaptiveSizePolicy::compute_young_generation_free_space: " | |
| 982 "cur_eden " SIZE_FORMAT, | |
| 983 cur_eden); | |
| 984 } | |
| 985 | |
| 986 // Used for diagnostics | |
| 987 clear_generation_free_space_flags(); | |
| 988 | |
| 989 if (_avg_minor_pause->padded_average() > gc_pause_goal_sec()) { | |
| 990 if (minor_pause_young_estimator()->decrement_will_decrease()) { | |
| 991 // If the minor pause is too long, shrink the young gen. | |
| 992 set_change_young_gen_for_min_pauses( | |
| 993 decrease_young_gen_for_min_pauses_true); | |
| 994 desired_eden_size = adjust_eden_for_pause_time(desired_eden_size); | |
| 995 } | |
| 996 } else if ((avg_remark_pause()->padded_average() > gc_pause_goal_sec()) || | |
| 997 (avg_initial_pause()->padded_average() > gc_pause_goal_sec())) { | |
| 998 // The remark or initial pauses are not meeting the goal. Should | |
| 999 // the generation be shrunk? | |
| 1000 if (get_and_clear_first_after_collection() && | |
| 1001 ((avg_remark_pause()->padded_average() > gc_pause_goal_sec() && | |
| 1002 remark_pause_young_estimator()->decrement_will_decrease()) || | |
| 1003 (avg_initial_pause()->padded_average() > gc_pause_goal_sec() && | |
| 1004 initial_pause_young_estimator()->decrement_will_decrease()))) { | |
| 1005 | |
| 1006 set_change_young_gen_for_maj_pauses( | |
| 1007 decrease_young_gen_for_maj_pauses_true); | |
| 1008 | |
| 1009 // If the remark or initial pause is too long and this is the | |
| 1010 // first young gen collection after a cms collection, shrink | |
| 1011 // the young gen. | |
| 1012 desired_eden_size = adjust_eden_for_pause_time(desired_eden_size); | |
| 1013 } | |
| 1014 // If not the first young gen collection after a cms collection, | |
| 1015 // don't do anything. In this case an adjustment has already | |
| 1016 // been made and the results of the adjustment has not yet been | |
| 1017 // measured. | |
| 1018 } else if ((minor_gc_cost() >= 0.0) && | |
| 1019 (adjusted_mutator_cost() < _throughput_goal)) { | |
| 1020 desired_eden_size = adjust_eden_for_throughput(desired_eden_size); | |
| 1021 } else { | |
| 1022 desired_eden_size = adjust_eden_for_footprint(desired_eden_size); | |
| 1023 } | |
| 1024 | |
| 1025 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 1026 gclog_or_tty->print_cr( | |
| 1027 "CMSAdaptiveSizePolicy::compute_young_generation_free_space limits:" | |
| 1028 " desired_eden_size: " SIZE_FORMAT | |
| 1029 " old_eden_size: " SIZE_FORMAT, | |
| 1030 desired_eden_size, cur_eden); | |
| 1031 } | |
| 1032 | |
| 1033 set_eden_size(desired_eden_size); | |
| 1034 } | |
| 1035 | |
| 1036 size_t CMSAdaptiveSizePolicy::adjust_promo_for_pause_time(size_t cur_promo) { | |
| 1037 size_t change = 0; | |
| 1038 size_t desired_promo = cur_promo; | |
| 1039 // Move this test up to caller like the adjust_eden_for_pause_time() | |
| 1040 // call. | |
| 1041 if ((AdaptiveSizePausePolicy == 0) && | |
| 1042 ((avg_remark_pause()->padded_average() > gc_pause_goal_sec()) || | |
| 1043 (avg_initial_pause()->padded_average() > gc_pause_goal_sec()))) { | |
| 1044 set_change_old_gen_for_maj_pauses(decrease_old_gen_for_maj_pauses_true); | |
| 1045 change = promo_decrement_aligned_down(cur_promo); | |
| 1046 desired_promo = cur_promo - change; | |
| 1047 } else if ((AdaptiveSizePausePolicy > 0) && | |
| 1048 (((avg_remark_pause()->padded_average() > gc_pause_goal_sec()) && | |
| 1049 remark_pause_old_estimator()->decrement_will_decrease()) || | |
| 1050 ((avg_initial_pause()->padded_average() > gc_pause_goal_sec()) && | |
| 1051 initial_pause_old_estimator()->decrement_will_decrease()))) { | |
| 1052 set_change_old_gen_for_maj_pauses(decrease_old_gen_for_maj_pauses_true); | |
| 1053 change = promo_decrement_aligned_down(cur_promo); | |
| 1054 desired_promo = cur_promo - change; | |
| 1055 } | |
| 1056 | |
| 1057 if ((change != 0) &&PrintAdaptiveSizePolicy && Verbose) { | |
| 1058 gclog_or_tty->print_cr( | |
| 1059 "CMSAdaptiveSizePolicy::adjust_promo_for_pause_time " | |
| 1060 "adjusting promo for pause time. " | |
| 1061 " starting promo size " SIZE_FORMAT | |
| 1062 " reduced promo size " SIZE_FORMAT | |
| 1063 " promo delta " SIZE_FORMAT, | |
| 1064 cur_promo, desired_promo, change); | |
| 1065 } | |
| 1066 | |
| 1067 return desired_promo; | |
| 1068 } | |
| 1069 | |
| 1070 // Try to share this with PS. | |
| 1071 size_t CMSAdaptiveSizePolicy::scale_by_gen_gc_cost(size_t base_change, | |
| 1072 double gen_gc_cost) { | |
| 1073 | |
| 1074 // Calculate the change to use for the tenured gen. | |
| 1075 size_t scaled_change = 0; | |
| 1076 // Can the increment to the generation be scaled? | |
| 1077 if (gc_cost() >= 0.0 && gen_gc_cost >= 0.0) { | |
| 1078 double scale_by_ratio = gen_gc_cost / gc_cost(); | |
| 1079 scaled_change = | |
| 1080 (size_t) (scale_by_ratio * (double) base_change); | |
| 1081 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 1082 gclog_or_tty->print_cr( | |
| 1083 "Scaled tenured increment: " SIZE_FORMAT " by %f down to " | |
| 1084 SIZE_FORMAT, | |
| 1085 base_change, scale_by_ratio, scaled_change); | |
| 1086 } | |
| 1087 } else if (gen_gc_cost >= 0.0) { | |
| 1088 // Scaling is not going to work. If the major gc time is the | |
| 1089 // larger than the other GC costs, give it a full increment. | |
| 1090 if (gen_gc_cost >= (gc_cost() - gen_gc_cost)) { | |
| 1091 scaled_change = base_change; | |
| 1092 } | |
| 1093 } else { | |
| 1094 // Don't expect to get here but it's ok if it does | |
| 1095 // in the product build since the delta will be 0 | |
| 1096 // and nothing will change. | |
| 1097 assert(false, "Unexpected value for gc costs"); | |
| 1098 } | |
| 1099 | |
| 1100 return scaled_change; | |
| 1101 } | |
| 1102 | |
| 1103 size_t CMSAdaptiveSizePolicy::adjust_promo_for_throughput(size_t cur_promo) { | |
| 1104 | |
| 1105 size_t desired_promo = cur_promo; | |
| 1106 | |
| 1107 set_change_old_gen_for_throughput(increase_old_gen_for_throughput_true); | |
| 1108 | |
| 1109 size_t change = promo_increment_aligned_up(cur_promo); | |
| 1110 size_t scaled_change = scale_by_gen_gc_cost(change, major_gc_cost()); | |
| 1111 | |
| 1112 if (cur_promo + scaled_change > cur_promo) { | |
| 1113 desired_promo = cur_promo + scaled_change; | |
| 1114 } | |
| 1115 | |
| 1116 _old_gen_change_for_major_throughput++; | |
| 1117 | |
| 1118 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 1119 gclog_or_tty->print_cr( | |
| 1120 "CMSAdaptiveSizePolicy::adjust_promo_for_throughput " | |
| 1121 "adjusting promo for throughput. " | |
| 1122 " starting promo size " SIZE_FORMAT | |
| 1123 " increased promo size " SIZE_FORMAT | |
| 1124 " promo delta " SIZE_FORMAT, | |
| 1125 cur_promo, desired_promo, scaled_change); | |
| 1126 } | |
| 1127 | |
| 1128 return desired_promo; | |
| 1129 } | |
| 1130 | |
| 1131 size_t CMSAdaptiveSizePolicy::adjust_promo_for_footprint(size_t cur_promo, | |
| 1132 size_t cur_eden) { | |
| 1133 | |
| 1134 set_decrease_for_footprint(decrease_young_gen_for_footprint_true); | |
| 1135 | |
| 1136 size_t change = promo_decrement(cur_promo); | |
| 1137 size_t desired_promo_size = cur_promo - change; | |
| 1138 | |
| 1139 if (PrintAdaptiveSizePolicy && Verbose) { | |
| 1140 gclog_or_tty->print_cr( | |
| 1141 "CMSAdaptiveSizePolicy::adjust_promo_for_footprint " | |
| 1142 "adjusting promo for footprint. " | |
| 1143 " starting promo size " SIZE_FORMAT | |
| 1144 " reduced promo size " SIZE_FORMAT | |
| 1145 " promo delta " SIZE_FORMAT, | |
| 1146 cur_promo, desired_promo_size, change); | |
| 1147 } | |
| 1148 return desired_promo_size; | |
| 1149 } | |
| 1150 | |
| 1151 void CMSAdaptiveSizePolicy::compute_tenured_generation_free_space( | |
| 1152 size_t cur_tenured_free, | |
| 1153 size_t max_tenured_available, | |
| 1154 size_t cur_eden) { | |
| 1155 // This can be bad if the desired value grows/shrinks without | |
| 1156 // any connection to the read free space | |
| 1157 size_t desired_promo_size = promo_size(); | |
| 1158 size_t tenured_limit = max_tenured_available; | |
| 1159 | |
| 1160 // Printout input | |
| 1161 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 1162 gclog_or_tty->print_cr( | |
| 1163 "CMSAdaptiveSizePolicy::compute_tenured_generation_free_space: " | |
| 1164 "cur_tenured_free " SIZE_FORMAT | |
| 1165 " max_tenured_available " SIZE_FORMAT, | |
| 1166 cur_tenured_free, max_tenured_available); | |
| 1167 } | |
| 1168 | |
| 1169 // Used for diagnostics | |
| 1170 clear_generation_free_space_flags(); | |
| 1171 | |
| 1172 set_decide_at_full_gc(decide_at_full_gc_true); | |
| 1173 if (avg_remark_pause()->padded_average() > gc_pause_goal_sec() || | |
| 1174 avg_initial_pause()->padded_average() > gc_pause_goal_sec()) { | |
| 1175 desired_promo_size = adjust_promo_for_pause_time(cur_tenured_free); | |
| 1176 } else if (avg_minor_pause()->padded_average() > gc_pause_goal_sec()) { | |
| 1177 // Nothing to do since the minor collections are too large and | |
| 1178 // this method only deals with the cms generation. | |
| 1179 } else if ((cms_gc_cost() >= 0.0) && | |
| 1180 (adjusted_mutator_cost() < _throughput_goal)) { | |
| 1181 desired_promo_size = adjust_promo_for_throughput(cur_tenured_free); | |
| 1182 } else { | |
| 1183 desired_promo_size = adjust_promo_for_footprint(cur_tenured_free, | |
| 1184 cur_eden); | |
| 1185 } | |
| 1186 | |
| 1187 if (PrintGC && PrintAdaptiveSizePolicy) { | |
| 1188 gclog_or_tty->print_cr( | |
| 1189 "CMSAdaptiveSizePolicy::compute_tenured_generation_free_space limits:" | |
| 1190 " desired_promo_size: " SIZE_FORMAT | |
| 1191 " old_promo_size: " SIZE_FORMAT, | |
| 1192 desired_promo_size, cur_tenured_free); | |
| 1193 } | |
| 1194 | |
| 1195 set_promo_size(desired_promo_size); | |
| 1196 } | |
| 1197 | |
| 6818 | 1198 uint CMSAdaptiveSizePolicy::compute_survivor_space_size_and_threshold( |
| 0 | 1199 bool is_survivor_overflow, |
| 6818 | 1200 uint tenuring_threshold, |
| 0 | 1201 size_t survivor_limit) { |
| 1202 assert(survivor_limit >= generation_alignment(), | |
| 1203 "survivor_limit too small"); | |
| 1204 assert((size_t)align_size_down(survivor_limit, generation_alignment()) | |
| 1205 == survivor_limit, "survivor_limit not aligned"); | |
| 1206 | |
| 1207 // Change UsePSAdaptiveSurvivorSizePolicy -> UseAdaptiveSurvivorSizePolicy? | |
| 1208 if (!UsePSAdaptiveSurvivorSizePolicy || | |
| 1209 !young_gen_policy_is_ready()) { | |
| 1210 return tenuring_threshold; | |
| 1211 } | |
| 1212 | |
| 1213 // We'll decide whether to increase or decrease the tenuring | |
| 1214 // threshold based partly on the newly computed survivor size | |
| 1215 // (if we hit the maximum limit allowed, we'll always choose to | |
| 1216 // decrement the threshold). | |
| 1217 bool incr_tenuring_threshold = false; | |
| 1218 bool decr_tenuring_threshold = false; | |
| 1219 | |
| 1220 set_decrement_tenuring_threshold_for_gc_cost(false); | |
| 1221 set_increment_tenuring_threshold_for_gc_cost(false); | |
| 1222 set_decrement_tenuring_threshold_for_survivor_limit(false); | |
| 1223 | |
| 1224 if (!is_survivor_overflow) { | |
| 1225 // Keep running averages on how much survived | |
| 1226 | |
| 1227 // We use the tenuring threshold to equalize the cost of major | |
| 1228 // and minor collections. | |
| 1229 // ThresholdTolerance is used to indicate how sensitive the | |
| 1230 // tenuring threshold is to differences in cost betweent the | |
| 1231 // collection types. | |
| 1232 | |
| 1233 // Get the times of interest. This involves a little work, so | |
| 1234 // we cache the values here. | |
| 1235 const double major_cost = major_gc_cost(); | |
| 1236 const double minor_cost = minor_gc_cost(); | |
| 1237 | |
| 1238 if (minor_cost > major_cost * _threshold_tolerance_percent) { | |
| 1239 // Minor times are getting too long; lower the threshold so | |
| 1240 // less survives and more is promoted. | |
| 1241 decr_tenuring_threshold = true; | |
| 1242 set_decrement_tenuring_threshold_for_gc_cost(true); | |
| 1243 } else if (major_cost > minor_cost * _threshold_tolerance_percent) { | |
| 1244 // Major times are too long, so we want less promotion. | |
| 1245 incr_tenuring_threshold = true; | |
| 1246 set_increment_tenuring_threshold_for_gc_cost(true); | |
| 1247 } | |
| 1248 | |
| 1249 } else { | |
| 1250 // Survivor space overflow occurred, so promoted and survived are | |
| 1251 // not accurate. We'll make our best guess by combining survived | |
| 1252 // and promoted and count them as survivors. | |
| 1253 // | |
| 1254 // We'll lower the tenuring threshold to see if we can correct | |
| 1255 // things. Also, set the survivor size conservatively. We're | |
| 1256 // trying to avoid many overflows from occurring if defnew size | |
| 1257 // is just too small. | |
| 1258 | |
| 1259 decr_tenuring_threshold = true; | |
| 1260 } | |
| 1261 | |
| 1262 // The padded average also maintains a deviation from the average; | |
| 1263 // we use this to see how good of an estimate we have of what survived. | |
| 1264 // We're trying to pad the survivor size as little as possible without | |
| 1265 // overflowing the survivor spaces. | |
| 1266 size_t target_size = align_size_up((size_t)_avg_survived->padded_average(), | |
| 1267 generation_alignment()); | |
| 1268 target_size = MAX2(target_size, generation_alignment()); | |
| 1269 | |
| 1270 if (target_size > survivor_limit) { | |
| 1271 // Target size is bigger than we can handle. Let's also reduce | |
| 1272 // the tenuring threshold. | |
| 1273 target_size = survivor_limit; | |
| 1274 decr_tenuring_threshold = true; | |
| 1275 set_decrement_tenuring_threshold_for_survivor_limit(true); | |
| 1276 } | |
| 1277 | |
| 1278 // Finally, increment or decrement the tenuring threshold, as decided above. | |
| 1279 // We test for decrementing first, as we might have hit the target size | |
| 1280 // limit. | |
| 1281 if (decr_tenuring_threshold && !(AlwaysTenure || NeverTenure)) { | |
| 1282 if (tenuring_threshold > 1) { | |
| 1283 tenuring_threshold--; | |
| 1284 } | |
| 1285 } else if (incr_tenuring_threshold && !(AlwaysTenure || NeverTenure)) { | |
| 1286 if (tenuring_threshold < MaxTenuringThreshold) { | |
| 1287 tenuring_threshold++; | |
| 1288 } | |
| 1289 } | |
| 1290 | |
| 1291 // We keep a running average of the amount promoted which is used | |
| 1292 // to decide when we should collect the old generation (when | |
| 1293 // the amount of old gen free space is less than what we expect to | |
| 1294 // promote). | |
| 1295 | |
| 1296 if (PrintAdaptiveSizePolicy) { | |
| 1297 // A little more detail if Verbose is on | |
| 1298 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 1299 if (Verbose) { | |
| 1300 gclog_or_tty->print( " avg_survived: %f" | |
| 1301 " avg_deviation: %f", | |
| 1302 _avg_survived->average(), | |
| 1303 _avg_survived->deviation()); | |
| 1304 } | |
| 1305 | |
| 1306 gclog_or_tty->print( " avg_survived_padded_avg: %f", | |
| 1307 _avg_survived->padded_average()); | |
| 1308 | |
| 1309 if (Verbose) { | |
| 1310 gclog_or_tty->print( " avg_promoted_avg: %f" | |
| 1311 " avg_promoted_dev: %f", | |
| 1312 gch->gc_stats(1)->avg_promoted()->average(), | |
| 1313 gch->gc_stats(1)->avg_promoted()->deviation()); | |
| 1314 } | |
| 1315 | |
| 1316 gclog_or_tty->print( " avg_promoted_padded_avg: %f" | |
| 1317 " avg_pretenured_padded_avg: %f" | |
| 6818 | 1318 " tenuring_thresh: %u" |
| 0 | 1319 " target_size: " SIZE_FORMAT |
| 1320 " survivor_limit: " SIZE_FORMAT, | |
| 1321 gch->gc_stats(1)->avg_promoted()->padded_average(), | |
| 1322 _avg_pretenured->padded_average(), | |
| 1323 tenuring_threshold, target_size, survivor_limit); | |
| 1324 gclog_or_tty->cr(); | |
| 1325 } | |
| 1326 | |
| 1327 set_survivor_size(target_size); | |
| 1328 | |
| 1329 return tenuring_threshold; | |
| 1330 } | |
| 1331 | |
| 1332 bool CMSAdaptiveSizePolicy::get_and_clear_first_after_collection() { | |
| 1333 bool result = _first_after_collection; | |
| 1334 _first_after_collection = false; | |
| 1335 return result; | |
| 1336 } | |
| 1337 | |
| 1338 bool CMSAdaptiveSizePolicy::print_adaptive_size_policy_on( | |
| 1339 outputStream* st) const { | |
| 1340 | |
| 1341 if (!UseAdaptiveSizePolicy) return false; | |
| 1342 | |
| 1343 GenCollectedHeap* gch = GenCollectedHeap::heap(); | |
| 1344 Generation* gen0 = gch->get_gen(0); | |
| 1345 DefNewGeneration* def_new = gen0->as_DefNewGeneration(); | |
| 1346 return | |
| 1347 AdaptiveSizePolicy::print_adaptive_size_policy_on( | |
| 1348 st, | |
| 1349 def_new->tenuring_threshold()); | |
| 1350 } |