--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp Thu Jun 05 15:57:56 2008 -0700
@@ -0,0 +1,287 @@
+/*
+ * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+//
+// Defines all globals flags used by the garbage-first compiler.
+//
+
+#define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct, manageable, product_rw) \
+ \
+ product(intx, ParallelGCG1AllocBufferSize, 4*K, \
+ "Size of parallel G1 allocation buffers in to-space.") \
+ \
+ product(intx, G1TimeSliceMS, 500, \
+ "Time slice for MMU specification") \
+ \
+ product(intx, G1MaxPauseTimeMS, 200, \
+ "Max GC time per MMU time slice") \
+ \
+ product(intx, G1ConfidencePerc, 50, \
+ "Confidence level for MMU/pause predictions") \
+ \
+ product(intx, G1MarkingOverheadPerc, 0, \
+ "Overhead of concurrent marking") \
+ \
+ product(bool, G1AccountConcurrentOverhead, false, \
+ "Whether soft real-time compliance in G1 will take into account" \
+ "concurrent overhead") \
+ \
+ product(intx, G1YoungGenSize, 0, \
+ "Size of the G1 young generation, 0 is the adaptive policy") \
+ \
+ product(bool, G1Gen, true, \
+ "If true, it will enable the generational G1") \
+ \
+ develop(intx, G1GCPct, 10, \
+ "The desired percent time spent on GC") \
+ \
+ product(intx, G1PolicyVerbose, 0, \
+ "The verbosity level on G1 policy decisions") \
+ \
+ develop(bool, G1UseHRIntoRS, true, \
+ "Determines whether the 'advanced' HR Into rem set is used.") \
+ \
+ product(bool, G1VerifyRemSet, false, \
+ "If true, verify the rem set functioning at each GC") \
+ \
+ product(bool, G1VerifyConcMark, false, \
+ "If true, verify the conc marking code at full GC time") \
+ \
+ develop(intx, G1MarkingVerboseLevel, 0, \
+ "Level (0-4) of verboseness of the marking code") \
+ \
+ develop(bool, G1VerifyConcMarkPrintReachable, true, \
+ "If conc mark verification fails, print reachable objects") \
+ \
+ develop(bool, G1TraceMarkStackOverflow, false, \
+ "If true, extra debugging code for CM restart for ovflw.") \
+ \
+ product(bool, G1VerifyMarkingInEvac, false, \
+ "If true, verify marking info during evacuation") \
+ \
+ develop(intx, G1PausesBtwnConcMark, -1, \
+ "If positive, fixed number of pauses between conc markings") \
+ \
+ product(intx, G1EfficiencyPctCausesMark, 80, \
+ "The cum gc efficiency since mark fall-off that causes " \
+ "new marking") \
+ \
+ product(bool, TraceConcurrentMark, false, \
+ "Trace concurrent mark") \
+ \
+ product(bool, SummarizeG1ConcMark, false, \
+ "Summarize concurrent mark info") \
+ \
+ product(bool, SummarizeG1RSStats, false, \
+ "Summarize remembered set processing info") \
+ \
+ product(bool, SummarizeG1ZFStats, false, \
+ "Summarize zero-filling info") \
+ \
+ product(bool, TraceG1Refine, false, \
+ "Trace G1 concurrent refinement") \
+ \
+ develop(bool, G1ConcMark, true, \
+ "If true, run concurrent marking for G1") \
+ \
+ product(intx, G1CMStackSize, 2 * 1024 * 1024, \
+ "Size of the mark stack for concurrent marking.") \
+ \
+ product(intx, G1CMRegionStackSize, 1024 * 1024, \
+ "Size of the region stack for concurrent marking.") \
+ \
+ develop(bool, G1ConcRefine, true, \
+ "If true, run concurrent rem set refinement for G1") \
+ \
+ develop(intx, G1ConcRefineTargTraversals, 4, \
+ "Number of concurrent refinement we try to achieve") \
+ \
+ develop(intx, G1ConcRefineInitialDelta, 4, \
+ "Number of heap regions of alloc ahead of starting collection " \
+ "pause to start concurrent refinement (initially)") \
+ \
+ product(bool, G1SmoothConcRefine, true, \
+ "Attempts to smooth out the overhead of concurrent refinement") \
+ \
+ develop(bool, G1ConcZeroFill, true, \
+ "If true, run concurrent zero-filling thread") \
+ \
+ develop(intx, G1ConcZFMaxRegions, 1, \
+ "Stop zero-filling when # of zf'd regions reaches") \
+ \
+ product(intx, G1SteadyStateUsed, 90, \
+ "If non-0, try to maintain 'used' at this pct (of max)") \
+ \
+ product(intx, G1SteadyStateUsedDelta, 30, \
+ "If G1SteadyStateUsed is non-0, then do pause this number of " \
+ "of percentage points earlier if no marking is in progress.") \
+ \
+ develop(bool, G1SATBBarrierPrintNullPreVals, false, \
+ "If true, count frac of ptr writes with null pre-vals.") \
+ \
+ product(intx, G1SATBLogBufferSize, 1*K, \
+ "Number of entries in an SATB log buffer.") \
+ \
+ product(intx, G1SATBProcessCompletedThreshold, 20, \
+ "Number of completed buffers that triggers log processing.") \
+ \
+ develop(intx, G1ExtraRegionSurvRate, 33, \
+ "If the young survival rate is S, and there's room left in " \
+ "to-space, we will allow regions whose survival rate is up to " \
+ "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
+ \
+ develop(intx, G1InitYoungSurvRatio, 50, \
+ "Expected Survival Rate for newly allocated bytes") \
+ \
+ develop(bool, G1SATBPrintStubs, false, \
+ "If true, print generated stubs for the SATB barrier") \
+ \
+ product(intx, G1ExpandByPctOfAvail, 20, \
+ "When expanding, % of uncommitted space to claim.") \
+ \
+ develop(bool, G1RSBarrierRegionFilter, true, \
+ "If true, generate region filtering code in RS barrier") \
+ \
+ develop(bool, G1RSBarrierNullFilter, true, \
+ "If true, generate null-pointer filtering code in RS barrier") \
+ \
+ develop(bool, G1PrintCTFilterStats, false, \
+ "If true, print stats on RS filtering effectiveness") \
+ \
+ develop(bool, G1RSBarrierUseQueue, true, \
+ "If true, use queueing RS barrier") \
+ \
+ develop(bool, G1RSLogCheckCardTable, false, \
+ "If true, verify that no dirty cards remain after RS log " \
+ "processing.") \
+ \
+ product(intx, G1MinPausesBetweenMarks, 2, \
+ "Number of inefficient pauses necessary to trigger marking.") \
+ \
+ product(intx, G1InefficientPausePct, 80, \
+ "Threshold of an 'inefficient' pauses (as % of cum efficiency.") \
+ \
+ product(intx, G1RSPopLimit, 32768, \
+ "Limit that defines popularity. Should go away! XXX") \
+ \
+ develop(bool, G1RSCountHisto, false, \
+ "If true, print a histogram of RS occupancies after each pause") \
+ \
+ product(intx, G1ObjPopLimit, 256, \
+ "Limit that defines popularity for an object.") \
+ \
+ product(bool, G1TraceFileOverwrite, false, \
+ "Allow the trace file to be overwritten") \
+ \
+ develop(intx, G1PrintRegionLivenessInfo, 0, \
+ "When > 0, print the occupancies of the <n> best and worst" \
+ "regions.") \
+ \
+ develop(bool, G1TracePopularity, false, \
+ "When true, provide detailed tracing of popularity.") \
+ \
+ product(bool, G1SummarizePopularity, false, \
+ "When true, provide end-of-run-summarization of popularity.") \
+ \
+ product(intx, G1NumPopularRegions, 1, \
+ "Number of regions reserved to hold popular objects. " \
+ "Should go away later.") \
+ \
+ develop(bool, G1PrintParCleanupStats, false, \
+ "When true, print extra stats about parallel cleanup.") \
+ \
+ product(bool, G1DoAgeCohortChecks, false, \
+ "When true, check well-formedness of age cohort structures.") \
+ \
+ develop(bool, G1DisablePreBarrier, false, \
+ "Disable generation of pre-barrier (i.e., marking barrier) ") \
+ \
+ develop(bool, G1DisablePostBarrier, false, \
+ "Disable generation of post-barrier (i.e., RS barrier) ") \
+ \
+ product(intx, G1DirtyCardQueueMax, 30, \
+ "Maximum number of completed RS buffers before mutator threads " \
+ "start processing them.") \
+ \
+ develop(intx, G1ConcRSLogCacheSize, 10, \
+ "Log base 2 of the length of conc RS hot-card cache.") \
+ \
+ product(bool, G1ConcRSCountTraversals, false, \
+ "If true, gather data about the number of times CR traverses " \
+ "cards ") \
+ \
+ product(intx, G1ConcRSHotCardLimit, 4, \
+ "The threshold that defines (>=) a hot card.") \
+ \
+ develop(bool, G1PrintOopAppls, false, \
+ "When true, print applications of closures to external locs.") \
+ \
+ product(intx, G1LogRSRegionEntries, 7, \
+ "Log_2 of max number of regions for which we keep bitmaps.") \
+ \
+ 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 failrues to print. " \
+ "-1 means print all.") \
+ \
+ develop(bool, G1ScrubRemSets, true, \
+ "When true, do RS scrubbing after cleanup.") \
+ \
+ develop(bool, G1RSScrubVerbose, false, \
+ "When true, do RS scrubbing with verbose output.") \
+ \
+ develop(bool, G1YoungSurvRateVerbose, false, \
+ "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.") \
+ \
+ product(bool, G1UseScanOnlyPrefix, false, \
+ "It determines whether the system will calculate an optimum " \
+ "scan-only set.") \
+ \
+ product(intx, G1MinReservePerc, 10, \
+ "It determines the minimum reserve we should have in the heap " \
+ "to minimize the probability of promotion failure.") \
+ \
+ product(bool, G1TraceRegions, false, \
+ "If set G1 will print information on which regions are being " \
+ "allocated and which are reclaimed.") \
+ \
+ develop(bool, G1HRRSUseSparseTable, true, \
+ "When true, use sparse table to save space.") \
+ \
+ develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
+ "Forces flushing of log buffers before verification.") \
+ \
+ product(intx, G1MaxSurvivorRegions, 0, \
+ "The maximum number of survivor regions")
+
+G1_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG)