Mercurial > hg > graal-jvmci-8
diff src/share/vm/gc_implementation/g1/g1_globals.hpp @ 2152:0fa27f37d4d4
6977804: G1: remove the zero-filling thread
Summary: This changeset removes the zero-filling thread from G1 and collapses the two free region lists we had before (the "free" and "unclean" lists) into one. The new free list uses the new heap region sets / lists abstractions that we'll ultimately use it to keep track of all regions in the heap. A heap region set was also introduced for the humongous regions. Finally, this change increases the concurrency between the thread that completes freeing regions (after a cleanup pause) and the rest of the system (before we'd have to wait for said thread to complete before allocating a new region). The changest also includes a lot of refactoring and code simplification.
Reviewed-by: jcoomes, johnc
| author | tonyp |
|---|---|
| date | Wed, 19 Jan 2011 19:30:42 -0500 |
| parents | 7e37af9d69ef |
| children | 234761c55641 |
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--- a/src/share/vm/gc_implementation/g1/g1_globals.hpp Wed Jan 19 13:04:37 2011 -0800 +++ b/src/share/vm/gc_implementation/g1/g1_globals.hpp Wed Jan 19 19:30:42 2011 -0500 @@ -75,21 +75,12 @@ "(0 means do not periodically generate this info); " \ "it also requires -XX:+G1SummarizeRSetStats") \ \ - diagnostic(bool, G1SummarizeZFStats, false, \ - "Summarize zero-filling info") \ - \ diagnostic(bool, G1TraceConcRefinement, false, \ "Trace G1 concurrent refinement") \ \ product(intx, G1MarkRegionStackSize, 1024 * 1024, \ "Size of the region stack for concurrent marking.") \ \ - develop(bool, G1ConcZeroFill, true, \ - "If true, run concurrent zero-filling thread") \ - \ - develop(intx, G1ConcZFMaxRegions, 1, \ - "Stop zero-filling when # of zf'd regions reaches") \ - \ develop(bool, G1SATBBarrierPrintNullPreVals, false, \ "If true, count frac of ptr writes with null pre-vals.") \ \ @@ -289,7 +280,20 @@ "Size of a work unit of cards claimed by a worker thread" \ "during RSet scanning.") \ \ - develop(bool, ReduceInitialCardMarksForG1, false, \ + develop(uintx, G1SecondaryFreeListAppendLength, 5, \ + "The number of regions we will add to the secondary free list " \ + "at every append operation") \ + \ + develop(bool, G1ConcRegionFreeingVerbose, false, \ + "Enables verboseness during concurrent region freeing") \ + \ + develop(bool, G1StressConcRegionFreeing, false, \ + "It stresses the concurrent region freeing operation") \ + \ + develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \ + "Artificial delay during concurrent region freeing") \ + \ + develop(bool, ReduceInitialCardMarksForG1, false, \ "When ReduceInitialCardMarks is true, this flag setting " \ " controls whether G1 allows the RICM optimization")