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src/share/vm/gc/g1/g1_globals.hpp
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rev 8851 : [mq]: webrev.00
@@ -24,10 +24,11 @@
#ifndef SHARE_VM_GC_G1_G1_GLOBALS_HPP
#define SHARE_VM_GC_G1_G1_GLOBALS_HPP
#include "runtime/globals.hpp"
+#include <float.h> // for DBL_MAX
//
// Defines all globals flags used by the garbage-first compiler.
//
#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw, range, constraint) \
@@ -59,21 +60,22 @@
diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
"The period (in number of GCs) at which we will generate " \
"update buffer processing info " \
"(0 means do not periodically generate this info); " \
"it also requires -XX:+G1SummarizeRSetStats") \
+ range(0, max_intx) \
\
diagnostic(bool, G1TraceConcRefinement, false, \
"Trace G1 concurrent refinement") \
\
experimental(bool, G1TraceStringSymbolTableScrubbing, false, \
"Trace information string and symbol table scrubbing.") \
\
product(double, G1ConcMarkStepDurationMillis, 10.0, \
"Target duration of individual concurrent marking steps " \
"in milliseconds.") \
- range(1.0, (double)max_uintx) \
+ range(1.0, DBL_MAX) \
\
product(intx, G1RefProcDrainInterval, 10, \
"The number of discovered reference objects to process before " \
"draining concurrent marking work queues.") \
range(1, max_intx) \
@@ -82,13 +84,15 @@
"If true, enable reference discovery during concurrent " \
"marking and reference processing at the end of remark.") \
\
product(size_t, G1SATBBufferSize, 1*K, \
"Number of entries in an SATB log buffer.") \
+ range(1, max_uintx) \
\
develop(intx, G1SATBProcessCompletedThreshold, 20, \
"Number of completed buffers that triggers log processing.") \
+ range(0, max_jint) \
\
product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
"Before enqueueing them, each mutator thread tries to do some " \
"filtering on the SATB buffers it generates. If post-filtering " \
"the percentage of retained entries is over this threshold " \
@@ -107,39 +111,45 @@
"Prints the liveness information for all regions in the heap " \
"at the end of a marking cycle.") \
\
product(size_t, G1UpdateBufferSize, 256, \
"Size of an update buffer") \
+ range(1, 1*G) \
\
product(intx, G1ConcRefinementYellowZone, 0, \
"Number of enqueued update buffers that will " \
"trigger concurrent processing. Will be selected ergonomically " \
"by default.") \
+ range(0, max_intx) \
\
product(intx, G1ConcRefinementRedZone, 0, \
"Maximum number of enqueued update buffers before mutator " \
"threads start processing new ones instead of enqueueing them. " \
"Will be selected ergonomically by default. Zero will disable " \
"concurrent processing.") \
+ range(0, max_intx) \
\
product(intx, G1ConcRefinementGreenZone, 0, \
"The number of update buffers that are left in the queue by the " \
"concurrent processing threads. Will be selected ergonomically " \
"by default.") \
+ range(0, max_intx) \
\
product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
"The last concurrent refinement thread wakes up every " \
"specified number of milliseconds to do miscellaneous work.") \
+ range(0, max_intx) \
\
product(intx, G1ConcRefinementThresholdStep, 0, \
"Each time the rset update queue increases by this amount " \
"activate the next refinement thread if available. " \
"Will be selected ergonomically by default.") \
\
product(intx, G1RSetUpdatingPauseTimePercent, 10, \
"A target percentage of time that is allowed to be spend on " \
"process RS update buffers during the collection pause.") \
+ range(0, 100) \
\
product(bool, G1UseAdaptiveConcRefinement, true, \
"Select green, yellow and red zones adaptively to meet the " \
"the pause requirements.") \
\
@@ -151,32 +161,39 @@
"The threshold that defines (>=) a hot card.") \
range(0, max_jubyte) \
\
develop(intx, G1RSetRegionEntriesBase, 256, \
"Max number of regions in a fine-grain table per MB.") \
+ range(1, max_jint) \
\
product(intx, G1RSetRegionEntries, 0, \
"Max number of regions for which we keep bitmaps." \
"Will be set ergonomically by default") \
+ range(0, max_jint) \
+ constraint(G1RSetRegionEntriesConstraintFunc,AfterErgo) \
\
develop(intx, G1RSetSparseRegionEntriesBase, 4, \
"Max number of entries per region in a sparse table " \
"per MB.") \
+ range(1, max_jint) \
\
product(intx, G1RSetSparseRegionEntries, 0, \
"Max number of entries per region in a sparse table." \
"Will be set ergonomically by default.") \
+ range(0, max_jint) \
+ constraint(G1RSetSparseRegionEntriesConstraintFunc,AfterErgo) \
\
develop(bool, G1RecordHRRSOops, false, \
"When true, record recent calls to rem set operations.") \
\
develop(bool, G1RecordHRRSEvents, false, \
"When true, record recent calls to rem set operations.") \
\
develop(intx, G1MaxVerifyFailures, -1, \
"The maximum number of verification failures to print. " \
"-1 means print all.") \
+ range(-1, max_jint) \
\
develop(bool, G1ScrubRemSets, true, \
"When true, do RS scrubbing after cleanup.") \
\
develop(bool, G1RSScrubVerbose, false, \
@@ -186,15 +203,17 @@
"print out the survival rate of young regions according to age.") \
\
develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
"the number of regions for which we'll print a surv rate " \
"summary.") \
+ range(0, max_intx) \
+ constraint(G1YoungSurvRateNumRegionsSummaryConstraintFunc,AfterErgo)\
\
product(uintx, G1ReservePercent, 10, \
"It determines the minimum reserve we should have in the heap " \
"to minimize the probability of promotion failure.") \
- range(0, 100) \
+ range(0, 50) \
\
diagnostic(bool, G1PrintHeapRegions, false, \
"If set G1 will print information on which regions are being " \
"allocated and which are reclaimed.") \
\
@@ -208,21 +227,25 @@
"When set, G1 will fail when it encounters an FP 'error', " \
"so as to allow debugging") \
\
product(size_t, G1HeapRegionSize, 0, \
"Size of the G1 regions.") \
+ range(0, 32*M) \
+ constraint(G1HeapRegionSizeConstraintFunc,AfterMemoryInit) \
\
product(uintx, G1ConcRefinementThreads, 0, \
"If non-0 is the number of parallel rem set update threads, " \
"otherwise the value is determined ergonomically.") \
+ range(0, max_jint-1) \
\
develop(bool, G1VerifyCTCleanup, false, \
"Verify card table cleanup.") \
\
product(size_t, G1RSetScanBlockSize, 64, \
"Size of a work unit of cards claimed by a worker thread" \
"during RSet scanning.") \
+ range(1, max_uintx) \
\
develop(uintx, G1SecondaryFreeListAppendLength, 5, \
"The number of regions we will add to the secondary free list " \
"at every append operation") \
\
@@ -237,10 +260,11 @@
\
develop(uintx, G1DummyRegionsPerGC, 0, \
"The number of dummy regions G1 will allocate at the end of " \
"each evacuation pause in order to artificially fill up the " \
"heap and stress the marking implementation.") \
+ range(0, 1000) \
\
develop(bool, G1ExitOnExpansionFailure, false, \
"Raise a fatal VM exit out of memory failure in the event " \
" that heap expansion fails due to running out of swap.") \
\
@@ -255,10 +279,11 @@
constraint(G1MaxNewSizePercentConstraintFunc,AfterErgo) \
\
experimental(uintx, G1NewSizePercent, 5, \
"Percentage (0-100) of the heap size to use as default " \
"minimum young gen size.") \
+ range(0, 100) \
constraint(G1NewSizePercentConstraintFunc,AfterErgo) \
\
experimental(uintx, G1MixedGCLiveThresholdPercent, 85, \
"Threshold for regions to be considered for inclusion in the " \
"collection set of mixed GCs. " \
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