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https://github.com/openjdk/jdk.git
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8142341: GC: current flags need ranges to be implemented
Add explicit ranges and constraint for all gc flags Reviewed-by: jwilhelm, gziemski, ddmitriev, tbenson
This commit is contained in:
Sangheon Kim
parent
95c869947a
commit
da8bf041ac
8 changed files with 154 additions and 18 deletions
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@ -25,7 +25,6 @@
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#ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
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#define SHARE_VM_RUNTIME_GLOBALS_HPP
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#include <float.h>
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#include "utilities/debug.hpp"
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#include <float.h> // for DBL_MAX
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@ -625,9 +624,6 @@ public:
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notproduct(bool, CheckCompressedOops, true, \
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"Generate checks in encoding/decoding code in debug VM") \
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\
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product_pd(size_t, HeapBaseMinAddress, \
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"OS specific low limit for heap base address") \
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\
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product(uintx, HeapSearchSteps, 3 PPC64_ONLY(+17), \
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"Heap allocation steps through preferred address regions to find" \
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" where it can allocate the heap. Number of steps to take per " \
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@ -692,6 +688,8 @@ public:
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\
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product(size_t, NUMAInterleaveGranularity, 2*M, \
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"Granularity to use for NUMA interleaving on Windows OS") \
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range(os::vm_allocation_granularity(), max_uintx) \
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constraint(NUMAInterleaveGranularityConstraintFunc,AfterErgo) \
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\
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product(bool, ForceNUMA, false, \
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"Force NUMA optimizations on single-node/UMA systems") \
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@ -704,6 +702,7 @@ public:
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\
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product(size_t, NUMASpaceResizeRate, 1*G, \
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"Do not reallocate more than this amount per collection") \
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range(0, max_uintx) \
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\
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product(bool, UseAdaptiveNUMAChunkSizing, true, \
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"Enable adaptive chunk sizing for NUMA") \
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@ -713,6 +712,7 @@ public:
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\
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product(uintx, NUMAPageScanRate, 256, \
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"Maximum number of pages to include in the page scan procedure") \
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range(0, max_uintx) \
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\
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product_pd(bool, NeedsDeoptSuspend, \
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"True for register window machines (sparc/ia64)") \
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@ -733,9 +733,11 @@ public:
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\
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product(size_t, LargePageSizeInBytes, 0, \
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"Large page size (0 to let VM choose the page size)") \
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range(0, max_uintx) \
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\
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product(size_t, LargePageHeapSizeThreshold, 128*M, \
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"Use large pages if maximum heap is at least this big") \
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range(0, max_uintx) \
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\
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product(bool, ForceTimeHighResolution, false, \
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"Using high time resolution (for Win32 only)") \
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@ -1526,9 +1528,11 @@ public:
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product(uintx, HeapMaximumCompactionInterval, 20, \
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"How often should we maximally compact the heap (not allowing " \
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"any dead space)") \
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range(0, max_uintx) \
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\
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product(uintx, HeapFirstMaximumCompactionCount, 3, \
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"The collection count for the first maximum compaction") \
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range(0, max_uintx) \
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\
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product(bool, UseMaximumCompactionOnSystemGC, true, \
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"Use maximum compaction in the Parallel Old garbage collector " \
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@ -1610,6 +1614,7 @@ public:
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diagnostic(uintx, GCLockerRetryAllocationCount, 2, \
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"Number of times to retry allocations when " \
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"blocked by the GC locker") \
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range(0, max_uintx) \
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\
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product(bool, UseCMSBestFit, true, \
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"Use CMS best fit allocation strategy") \
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@ -1664,6 +1669,7 @@ public:
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\
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product(uintx, ParGCDesiredObjsFromOverflowList, 20, \
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"The desired number of objects to claim from the overflow list") \
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range(0, max_uintx) \
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\
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diagnostic(uintx, ParGCStridesPerThread, 2, \
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"The number of strides per worker thread that we divide up the " \
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@ -1717,6 +1723,7 @@ public:
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product(uintx, CMSOldPLABReactivityFactor, 2, \
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"The gain in the feedback loop for on-the-fly PLAB resizing " \
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"during a scavenge") \
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range(1, max_uintx) \
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\
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product(bool, AlwaysPreTouch, false, \
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"Force all freshly committed pages to be pre-touched") \
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@ -1745,6 +1752,7 @@ public:
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product(uintx, CMS_FLSPadding, 1, \
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"The multiple of deviation from mean to use for buffering " \
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"against volatility in free list demand") \
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range(0, max_juint) \
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\
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product(uintx, FLSCoalescePolicy, 2, \
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"CMS: aggressiveness level for coalescing, increasing " \
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@ -1793,10 +1801,12 @@ public:
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product(uintx, CMS_SweepPadding, 1, \
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"The multiple of deviation from mean to use for buffering " \
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"against volatility in inter-sweep duration") \
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range(0, max_juint) \
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\
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product(uintx, CMS_SweepTimerThresholdMillis, 10, \
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"Skip block flux-rate sampling for an epoch unless inter-sweep " \
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"duration exceeds this threshold in milliseconds") \
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range(0, max_uintx) \
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\
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product(bool, CMSClassUnloadingEnabled, true, \
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"Whether class unloading enabled when using CMS GC") \
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@ -1804,6 +1814,7 @@ public:
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product(uintx, CMSClassUnloadingMaxInterval, 0, \
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"When CMS class unloading is enabled, the maximum CMS cycle " \
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"count for which classes may not be unloaded") \
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range(0, max_uintx) \
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\
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product(uintx, CMSIndexedFreeListReplenish, 4, \
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"Replenish an indexed free list with this number of chunks") \
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@ -1837,6 +1848,7 @@ public:
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\
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product(uintx, CMSMaxAbortablePrecleanLoops, 0, \
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"Maximum number of abortable preclean iterations, if > 0") \
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range(0, max_uintx) \
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\
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product(intx, CMSMaxAbortablePrecleanTime, 5000, \
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"Maximum time in abortable preclean (in milliseconds)") \
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@ -1844,6 +1856,7 @@ public:
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\
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product(uintx, CMSAbortablePrecleanMinWorkPerIteration, 100, \
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"Nominal minimum work per abortable preclean iteration") \
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range(0, max_uintx) \
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\
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manageable(intx, CMSAbortablePrecleanWaitMillis, 100, \
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"Time that we sleep between iterations when not given " \
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@ -1931,6 +1944,7 @@ public:
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\
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product(size_t, CMSScheduleRemarkEdenSizeThreshold, 2*M, \
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"If Eden size is below this, do not try to schedule remark") \
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range(0, max_uintx) \
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\
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product(uintx, CMSScheduleRemarkEdenPenetration, 50, \
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"The Eden occupancy percentage (0-100) at which " \
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@ -1960,6 +1974,7 @@ public:
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\
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manageable(intx, CMSWaitDuration, 2000, \
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"Time in milliseconds that CMS thread waits for young GC") \
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range(min_jint, max_jint) \
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\
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develop(uintx, CMSCheckInterval, 1000, \
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"Interval in milliseconds that CMS thread checks if it " \
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@ -2161,6 +2176,7 @@ public:
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product(size_t, ErgoHeapSizeLimit, 0, \
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"Maximum ergonomically set heap size (in bytes); zero means use " \
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"MaxRAM / MaxRAMFraction") \
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range(0, max_uintx) \
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\
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product(uintx, MaxRAMFraction, 4, \
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"Maximum fraction (1/n) of real memory used for maximum heap " \
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@ -2185,6 +2201,7 @@ public:
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\
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product(uintx, AutoGCSelectPauseMillis, 5000, \
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"Automatic GC selection pause threshold in milliseconds") \
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range(0, max_uintx) \
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\
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product(bool, UseAdaptiveSizePolicy, true, \
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"Use adaptive generation sizing policies") \
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@ -2217,12 +2234,14 @@ public:
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\
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product(uintx, AdaptiveSizePolicyInitializingSteps, 20, \
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"Number of steps where heuristics is used before data is used") \
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range(0, max_uintx) \
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\
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develop(uintx, AdaptiveSizePolicyReadyThreshold, 5, \
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"Number of collections before the adaptive sizing is started") \
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\
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product(uintx, AdaptiveSizePolicyOutputInterval, 0, \
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"Collection interval for printing information; zero means never") \
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range(0, max_uintx) \
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\
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product(bool, UseAdaptiveSizePolicyFootprintGoal, true, \
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"Use adaptive minimum footprint as a goal") \
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@ -2237,12 +2256,15 @@ public:
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\
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product(uintx, PausePadding, 1, \
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"How much buffer to keep for pause time") \
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range(0, max_juint) \
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\
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product(uintx, PromotedPadding, 3, \
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"How much buffer to keep for promotion failure") \
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range(0, max_juint) \
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\
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product(uintx, SurvivorPadding, 3, \
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"How much buffer to keep for survivor overflow") \
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range(0, max_juint) \
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\
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product(uintx, ThresholdTolerance, 10, \
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"Allowed collection cost difference between generations") \
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@ -2251,6 +2273,7 @@ public:
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product(uintx, AdaptiveSizePolicyCollectionCostMargin, 50, \
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"If collection costs are within margin, reduce both by full " \
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"delta") \
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range(0, 100) \
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\
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product(uintx, YoungGenerationSizeIncrement, 20, \
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"Adaptive size percentage change in young generation") \
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@ -2289,9 +2312,11 @@ public:
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product(uintx, MaxGCMinorPauseMillis, max_uintx, \
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"Adaptive size policy maximum GC minor pause time goal " \
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"in millisecond") \
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range(0, max_uintx) \
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\
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product(uintx, GCTimeRatio, 99, \
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"Adaptive size policy application time to GC time ratio") \
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range(0, max_juint) \
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\
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product(uintx, AdaptiveSizeDecrementScaleFactor, 4, \
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"Adaptive size scale down factor for shrinking") \
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@ -2302,6 +2327,7 @@ public:
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\
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product(uintx, AdaptiveSizeMajorGCDecayTimeScale, 10, \
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"Time scale over which major costs decay") \
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range(0, max_uintx) \
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\
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product(uintx, MinSurvivorRatio, 3, \
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"Minimum ratio of young generation/survivor space size") \
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@ -2309,9 +2335,11 @@ public:
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\
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product(uintx, InitialSurvivorRatio, 8, \
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"Initial ratio of young generation/survivor space size") \
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range(0, max_uintx) \
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\
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product(size_t, BaseFootPrintEstimate, 256*M, \
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"Estimate of footprint other than Java Heap") \
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range(0, max_uintx) \
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\
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product(bool, UseGCOverheadLimit, true, \
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"Use policy to limit of proportion of time spent in GC " \
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@ -2336,12 +2364,15 @@ public:
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\
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product(intx, PrefetchCopyIntervalInBytes, -1, \
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"How far ahead to prefetch destination area (<= 0 means off)") \
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range(-1, max_jint) \
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\
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product(intx, PrefetchScanIntervalInBytes, -1, \
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"How far ahead to prefetch scan area (<= 0 means off)") \
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range(-1, max_jint) \
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\
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product(intx, PrefetchFieldsAhead, -1, \
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"How many fields ahead to prefetch in oop scan (<= 0 means off)") \
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range(-1, max_jint) \
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\
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diagnostic(bool, VerifySilently, false, \
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"Do not print the verification progress") \
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@ -2389,6 +2420,7 @@ public:
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\
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diagnostic(uintx, CPUForCMSThread, 0, \
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"When BindCMSThreadToCPU is true, the CPU to bind CMS thread to") \
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range(0, max_juint) \
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\
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product(bool, BindGCTaskThreadsToCPUs, false, \
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"Bind GCTaskThreads to CPUs if possible") \
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@ -2398,14 +2430,17 @@ public:
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\
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product(uintx, ProcessDistributionStride, 4, \
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"Stride through processors when distributing processes") \
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range(0, max_juint) \
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\
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product(uintx, CMSCoordinatorYieldSleepCount, 10, \
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"Number of times the coordinator GC thread will sleep while " \
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"yielding before giving up and resuming GC") \
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range(0, max_juint) \
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\
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product(uintx, CMSYieldSleepCount, 0, \
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"Number of times a GC thread (minus the coordinator) " \
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"will sleep while yielding before giving up and resuming GC") \
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range(0, max_juint) \
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\
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/* gc tracing */ \
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manageable(bool, PrintGC, false, \
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@ -2554,10 +2589,12 @@ public:
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product(uintx, NumberOfGCLogFiles, 0, \
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"Number of gclog files in rotation " \
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"(default: 0, no rotation)") \
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range(0, max_uintx) \
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\
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product(size_t, GCLogFileSize, 8*K, \
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"GC log file size, requires UseGCLogFileRotation. " \
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"Set to 0 to only trigger rotation via jcmd") \
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range(0, max_uintx) \
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\
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/* JVMTI heap profiling */ \
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\
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@ -3325,6 +3362,7 @@ public:
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\
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product(size_t, OldSize, ScaleForWordSize(4*M), \
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"Initial tenured generation size (in bytes)") \
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range(0, max_uintx) \
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\
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product(size_t, NewSize, ScaleForWordSize(1*M), \
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"Initial new generation size (in bytes)") \
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@ -3333,10 +3371,16 @@ public:
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product(size_t, MaxNewSize, max_uintx, \
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"Maximum new generation size (in bytes), max_uintx means set " \
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"ergonomically") \
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range(0, max_uintx) \
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\
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product_pd(size_t, HeapBaseMinAddress, \
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"OS specific low limit for heap base address") \
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constraint(HeapBaseMinAddressConstraintFunc,AfterErgo) \
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\
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product(size_t, PretenureSizeThreshold, 0, \
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"Maximum size in bytes of objects allocated in DefNew " \
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"generation; zero means no maximum") \
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range(0, max_uintx) \
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\
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product(size_t, MinTLABSize, 2*K, \
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"Minimum allowed TLAB size (in bytes)") \
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@ -3368,10 +3412,12 @@ public:
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\
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product(uintx, TLABRefillWasteFraction, 64, \
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"Maximum TLAB waste at a refill (internal fragmentation)") \
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range(1, max_uintx) \
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range(1, max_juint) \
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\
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product(uintx, TLABWasteIncrement, 4, \
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"Increment allowed waste at slow allocation") \
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range(0, max_jint) \
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constraint(TLABWasteIncrementConstraintFunc,AfterMemoryInit) \
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\
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product(uintx, SurvivorRatio, 8, \
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"Ratio of eden/survivor space size") \
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@ -3385,6 +3431,7 @@ public:
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product_pd(size_t, NewSizeThreadIncrease, \
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"Additional size added to desired new generation size per " \
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"non-daemon thread (in bytes)") \
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range(0, max_uintx) \
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\
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product_pd(size_t, MetaspaceSize, \
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"Initial size of Metaspaces (in bytes)") \
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@ -3420,9 +3467,11 @@ public:
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\
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product(size_t, MinHeapDeltaBytes, ScaleForWordSize(128*K), \
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"The minimum change in heap space due to GC (in bytes)") \
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range(0, max_uintx) \
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\
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product(size_t, MinMetaspaceExpansion, ScaleForWordSize(256*K), \
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"The minimum expansion of Metaspace (in bytes)") \
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range(0, max_uintx) \
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\
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product(uintx, MaxMetaspaceFreeRatio, 70, \
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"The maximum percentage of Metaspace free after GC to avoid " \
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@ -3438,13 +3487,16 @@ public:
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\
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product(size_t, MaxMetaspaceExpansion, ScaleForWordSize(4*M), \
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"The maximum expansion of Metaspace without full GC (in bytes)") \
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range(0, max_uintx) \
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\
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product(uintx, QueuedAllocationWarningCount, 0, \
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"Number of times an allocation that queues behind a GC " \
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"will retry before printing a warning") \
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range(0, max_uintx) \
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\
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diagnostic(uintx, VerifyGCStartAt, 0, \
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"GC invoke count where +VerifyBefore/AfterGC kicks in") \
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range(0, max_uintx) \
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\
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diagnostic(intx, VerifyGCLevel, 0, \
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"Generation level at which to start +VerifyBefore/AfterGC") \
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@ -3482,15 +3534,18 @@ public:
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\
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product(intx, PrintCMSStatistics, 0, \
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"Statistics for CMS") \
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range(0, 2) \
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\
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product(bool, PrintCMSInitiationStatistics, false, \
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"Statistics for initiating a CMS collection") \
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\
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product(intx, PrintFLSStatistics, 0, \
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"Statistics for CMS' FreeListSpace") \
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range(0, 2) \
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\
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product(intx, PrintFLSCensus, 0, \
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"Census for CMS' FreeListSpace") \
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range(0, 1) \
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\
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develop(uintx, GCExpandToAllocateDelayMillis, 0, \
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"Delay between expansion and allocation (in milliseconds)") \
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@ -3517,6 +3572,7 @@ public:
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product(uintx, GCDrainStackTargetSize, 64, \
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"Number of entries we will try to leave on the stack " \
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"during parallel gc") \
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range(0, max_juint) \
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\
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/* stack parameters */ \
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product_pd(intx, StackYellowPages, \
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