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src/share/vm/gc/epsilon/epsilon_globals.hpp
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
* 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.
@@ -20,20 +20,19 @@
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
-#ifndef SHARE_VM_GC_G1_G1_GLOBALS_HPP
-#define SHARE_VM_GC_G1_G1_GLOBALS_HPP
+#ifndef SHARE_VM_GC_EPSILON_GLOBALS_HPP
+#define SHARE_VM_GC_EPSILON_GLOBALS_HPP
#include "runtime/globals.hpp"
-#include <float.h> // for DBL_MAX
//
-// Defines all globals flags used by the garbage-first compiler.
+// Defines all globals flags used by the Epsilon GC.
//
-#define G1_FLAGS(develop, \
+#define EPSILON_FLAGS(develop, \
develop_pd, \
product, \
product_pd, \
diagnostic, \
diagnostic_pd, \
@@ -43,285 +42,15 @@
product_rw, \
range, \
constraint, \
writeable) \
\
- product(bool, G1UseAdaptiveIHOP, true, \
- "Adaptively adjust the initiating heap occupancy from the " \
- "initial value of InitiatingHeapOccupancyPercent. The policy " \
- "attempts to start marking in time based on application " \
- "behavior.") \
- \
- experimental(size_t, G1AdaptiveIHOPNumInitialSamples, 3, \
- "How many completed time periods from initial mark to first " \
- "mixed gc are required to use the input values for prediction " \
- "of the optimal occupancy to start marking.") \
- range(1, max_intx) \
- \
- product(uintx, G1ConfidencePercent, 50, \
- "Confidence level for MMU/pause predictions") \
- range(0, 100) \
- \
- develop(intx, G1MarkingOverheadPercent, 0, \
- "Overhead of concurrent marking") \
- range(0, 100) \
- \
- 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 that logging is enabled on the trace" \
- "level for gc+remset") \
- range(0, max_intx) \
- \
- product(double, G1ConcMarkStepDurationMillis, 10.0, \
- "Target duration of individual concurrent marking steps " \
- "in milliseconds.") \
- 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) \
- \
- experimental(double, G1LastPLABAverageOccupancy, 50.0, \
- "The expected average occupancy of the last PLAB in " \
- "percent.") \
- range(0.001, 100.0) \
- \
- 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 " \
- "the buffer will be enqueued for processing. A value of 0 " \
- "specifies that mutator threads should not do such filtering.") \
- range(0, 100) \
- \
- experimental(intx, G1ExpandByPercentOfAvailable, 20, \
- "When expanding, % of uncommitted space to claim.") \
- range(0, 100) \
- \
- develop(bool, G1RSBarrierRegionFilter, true, \
- "If true, generate region filtering code in RS barrier") \
- \
- product(size_t, G1UpdateBufferSize, 256, \
- "Size of an update buffer") \
- range(1, NOT_LP64(32*M) LP64_ONLY(1*G)) \
- \
- product(size_t, G1ConcRefinementYellowZone, 0, \
- "Number of enqueued update buffers that will " \
- "trigger concurrent processing. Will be selected ergonomically " \
- "by default.") \
- range(0, max_intx) \
- \
- product(size_t, 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.") \
- range(0, max_intx) \
- \
- product(size_t, 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(uintx, G1ConcRefinementServiceIntervalMillis, 300, \
- "The last concurrent refinement thread wakes up every " \
- "specified number of milliseconds to do miscellaneous work.") \
- range(0, max_jint) \
- \
- product(size_t, G1ConcRefinementThresholdStep, 2, \
- "Each time the rset update queue increases by this amount " \
- "activate the next refinement thread if available. " \
- "The actual step size will be selected ergonomically by " \
- "default, with this value used to determine a lower bound.") \
- range(1, SIZE_MAX) \
- \
- 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.") \
- \
- product(size_t, G1ConcRSLogCacheSize, 10, \
- "Log base 2 of the length of conc RS hot-card cache.") \
- range(0, 27) \
- \
- product(uintx, G1ConcRSHotCardLimit, 4, \
- "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/wordSize) \
- \
- product(intx, G1RSetRegionEntries, 0, \
- "Max number of regions for which we keep bitmaps." \
- "Will be set ergonomically by default") \
- range(0, max_jint/wordSize) \
- constraint(G1RSetRegionEntriesConstraintFunc,AfterErgo) \
- \
- develop(intx, G1RSetSparseRegionEntriesBase, 4, \
- "Max number of entries per region in a sparse table " \
- "per MB.") \
- range(1, max_jint/wordSize) \
- \
- product(intx, G1RSetSparseRegionEntries, 0, \
- "Max number of entries per region in a sparse table." \
- "Will be set ergonomically by default.") \
- range(0, max_jint/wordSize) \
- constraint(G1RSetSparseRegionEntriesConstraintFunc,AfterErgo) \
- \
- 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.") \
- \
- product(uintx, G1ReservePercent, 10, \
- "It determines the minimum reserve we should have in the heap " \
- "to minimize the probability of promotion failure.") \
- range(0, 50) \
- \
- develop(bool, G1HRRSUseSparseTable, true, \
- "When true, use sparse table to save space.") \
- \
- develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
- "Forces flushing of log buffers before verification.") \
- \
- product(size_t, G1HeapRegionSize, 0, \
- "Size of the G1 regions.") \
- range(0, 32*M) \
- constraint(G1HeapRegionSizeConstraintFunc,AfterMemoryInit) \
- \
- product(uint, G1ConcRefinementThreads, 0, \
- "The number of parallel rem set update threads. " \
- "Will be set ergonomically by default.") \
- range(0, (max_jint-1)/wordSize) \
- \
- 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") \
- \
- develop(bool, G1StressConcRegionFreeing, false, \
- "It stresses the concurrent region freeing operation") \
- \
- develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
- "Artificial delay during concurrent region freeing") \
- \
- 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.") \
- \
- 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.") \
- \
- experimental(uintx, G1MaxNewSizePercent, 60, \
- "Percentage (0-100) of the heap size to use as default " \
- " maximum young gen size.") \
- range(0, 100) \
- 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. " \
- "Regions with live bytes exceeding this will not be collected.") \
- range(0, 100) \
- \
- product(uintx, G1HeapWastePercent, 5, \
- "Amount of space, expressed as a percentage of the heap size, " \
- "that G1 is willing not to collect to avoid expensive GCs.") \
- range(0, 100) \
- \
- product(uintx, G1MixedGCCountTarget, 8, \
- "The target number of mixed GCs after a marking cycle.") \
- range(0, max_uintx) \
- \
- experimental(bool, G1PretouchAuxiliaryMemory, false, \
- "Pre-touch large auxiliary data structures used by the GC.") \
- \
- experimental(bool, G1EagerReclaimHumongousObjects, true, \
- "Try to reclaim dead large objects at every young GC.") \
- \
- experimental(bool, G1EagerReclaimHumongousObjectsWithStaleRefs, true, \
- "Try to reclaim dead large objects that have a few stale " \
- "references at every young GC.") \
- \
- experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
- "An upper bound for the number of old CSet regions expressed " \
- "as a percentage of the heap size.") \
- range(0, 100) \
- \
- notproduct(bool, G1EvacuationFailureALot, false, \
- "Force use of evacuation failure handling during certain " \
- "evacuation pauses") \
- \
- develop(uintx, G1EvacuationFailureALotCount, 1000, \
- "Number of successful evacuations between evacuation failures " \
- "occurring at object copying") \
- \
- develop(uintx, G1EvacuationFailureALotInterval, 5, \
- "Total collections between forced triggering of evacuation " \
- "failures") \
- \
- develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
- "Force use of evacuation failure handling during evacuation " \
- "pauses when marking is in progress") \
- \
- develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
- "Force use of evacuation failure handling during initial mark " \
- "evacuation pauses") \
- \
- develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
- "Force use of evacuation failure handling during young " \
- "evacuation pauses") \
- \
- develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
- "Force use of evacuation failure handling during mixed " \
- "evacuation pauses") \
- \
- diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \
- "If true, perform verification of each heap region's " \
- "remembered set when verifying the heap during a full GC.") \
- \
- diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \
- "Verify the code root lists attached to each heap region.") \
- \
- develop(bool, G1VerifyBitmaps, false, \
- "Verifies the consistency of the marking bitmaps")
+ experimental(size_t, EpsilonTLABSize, 4 * M, \
+ "Static TLAB size for Epsilon GC.") \
+ range(1, max_intx)
-G1_FLAGS(DECLARE_DEVELOPER_FLAG, \
+EPSILON_FLAGS(DECLARE_DEVELOPER_FLAG, \
DECLARE_PD_DEVELOPER_FLAG, \
DECLARE_PRODUCT_FLAG, \
DECLARE_PD_PRODUCT_FLAG, \
DECLARE_DIAGNOSTIC_FLAG, \
DECLARE_PD_DIAGNOSTIC_FLAG, \
@@ -331,6 +60,6 @@
DECLARE_PRODUCT_RW_FLAG, \
IGNORE_RANGE, \
IGNORE_CONSTRAINT, \
IGNORE_WRITEABLE)
-#endif // SHARE_VM_GC_G1_G1_GLOBALS_HPP
+#endif // SHARE_VM_GC_EPSILON_GLOBALS_HPP
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