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src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp

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rev 7902 : imported patch strings


 532     }
 533     assert(_markBitMap.covers(_span), "_markBitMap inconsistency?");
 534   }
 535   {
 536     _modUnionTable.allocate(_span);
 537     assert(_modUnionTable.covers(_span), "_modUnionTable inconsistency?");
 538   }
 539 
 540   if (!_markStack.allocate(MarkStackSize)) {
 541     warning("Failed to allocate CMS Marking Stack");
 542     return;
 543   }
 544 
 545   // Support for multi-threaded concurrent phases
 546   if (CMSConcurrentMTEnabled) {
 547     if (FLAG_IS_DEFAULT(ConcGCThreads)) {
 548       // just for now
 549       FLAG_SET_DEFAULT(ConcGCThreads, (ParallelGCThreads + 3)/4);
 550     }
 551     if (ConcGCThreads > 1) {
 552       _conc_workers = new YieldingFlexibleWorkGang("Parallel CMS Threads",
 553                                  ConcGCThreads, true);
 554       if (_conc_workers == NULL) {
 555         warning("GC/CMS: _conc_workers allocation failure: "
 556               "forcing -CMSConcurrentMTEnabled");
 557         CMSConcurrentMTEnabled = false;
 558       } else {
 559         _conc_workers->initialize_workers();
 560       }
 561     } else {
 562       CMSConcurrentMTEnabled = false;
 563     }
 564   }
 565   if (!CMSConcurrentMTEnabled) {
 566     ConcGCThreads = 0;
 567   } else {
 568     // Turn off CMSCleanOnEnter optimization temporarily for
 569     // the MT case where it's not fixed yet; see 6178663.
 570     CMSCleanOnEnter = false;
 571   }
 572   assert((_conc_workers != NULL) == (ConcGCThreads > 1),




 532     }
 533     assert(_markBitMap.covers(_span), "_markBitMap inconsistency?");
 534   }
 535   {
 536     _modUnionTable.allocate(_span);
 537     assert(_modUnionTable.covers(_span), "_modUnionTable inconsistency?");
 538   }
 539 
 540   if (!_markStack.allocate(MarkStackSize)) {
 541     warning("Failed to allocate CMS Marking Stack");
 542     return;
 543   }
 544 
 545   // Support for multi-threaded concurrent phases
 546   if (CMSConcurrentMTEnabled) {
 547     if (FLAG_IS_DEFAULT(ConcGCThreads)) {
 548       // just for now
 549       FLAG_SET_DEFAULT(ConcGCThreads, (ParallelGCThreads + 3)/4);
 550     }
 551     if (ConcGCThreads > 1) {
 552       _conc_workers = new YieldingFlexibleWorkGang("CMS Threads",
 553                                  ConcGCThreads, true);
 554       if (_conc_workers == NULL) {
 555         warning("GC/CMS: _conc_workers allocation failure: "
 556               "forcing -CMSConcurrentMTEnabled");
 557         CMSConcurrentMTEnabled = false;
 558       } else {
 559         _conc_workers->initialize_workers();
 560       }
 561     } else {
 562       CMSConcurrentMTEnabled = false;
 563     }
 564   }
 565   if (!CMSConcurrentMTEnabled) {
 566     ConcGCThreads = 0;
 567   } else {
 568     // Turn off CMSCleanOnEnter optimization temporarily for
 569     // the MT case where it's not fixed yet; see 6178663.
 570     CMSCleanOnEnter = false;
 571   }
 572   assert((_conc_workers != NULL) == (ConcGCThreads > 1),
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