7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
Summary: Refactor G1's hot card cache and card counts table into their own files. Simplify the card counts table, including removing the encoding of the card index in each entry. The card counts table now has a 1:1 correspondence with the cards spanned by heap. Space for the card counts table is reserved from virtual memory (rather than C heap) during JVM startup and is committed/expanded when the heap is expanded. Changes were also reviewed-by Vitaly Davidovich.
Reviewed-by: tschatzl, jmasa
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#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VMSTRUCTS_G1_HPP
#define SHARE_VM_GC_IMPLEMENTATION_G1_VMSTRUCTS_G1_HPP
#include "gc_implementation/g1/heapRegion.hpp"
#include "gc_implementation/g1/heapRegionSeq.inline.hpp"
#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
#define VM_STRUCTS_G1(nonstatic_field, static_field) \
\
static_field(HeapRegion, GrainBytes, size_t) \
\
nonstatic_field(HeapRegionSeq, _regions, HeapRegion**) \
nonstatic_field(HeapRegionSeq, _length, uint) \
\
nonstatic_field(G1CollectedHeap, _hrs, HeapRegionSeq) \
nonstatic_field(G1CollectedHeap, _g1_committed, MemRegion) \
nonstatic_field(G1CollectedHeap, _summary_bytes_used, size_t) \
nonstatic_field(G1CollectedHeap, _g1mm, G1MonitoringSupport*) \
nonstatic_field(G1CollectedHeap, _old_set, HeapRegionSetBase) \
nonstatic_field(G1CollectedHeap, _humongous_set, HeapRegionSetBase) \
\
nonstatic_field(G1MonitoringSupport, _eden_committed, size_t) \
nonstatic_field(G1MonitoringSupport, _eden_used, size_t) \
nonstatic_field(G1MonitoringSupport, _survivor_committed, size_t) \
nonstatic_field(G1MonitoringSupport, _survivor_used, size_t) \
nonstatic_field(G1MonitoringSupport, _old_committed, size_t) \
nonstatic_field(G1MonitoringSupport, _old_used, size_t) \
\
nonstatic_field(HeapRegionSetBase, _length, uint) \
nonstatic_field(HeapRegionSetBase, _region_num, uint) \
nonstatic_field(HeapRegionSetBase, _total_used_bytes, size_t) \
#define VM_TYPES_G1(declare_type, declare_toplevel_type) \
\
declare_type(G1CollectedHeap, SharedHeap) \
\
declare_type(HeapRegion, ContiguousSpace) \
declare_toplevel_type(HeapRegionSeq) \
declare_toplevel_type(HeapRegionSetBase) \
declare_toplevel_type(G1MonitoringSupport) \
\
declare_toplevel_type(G1CollectedHeap*) \
declare_toplevel_type(HeapRegion*) \
declare_toplevel_type(G1MonitoringSupport*) \
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_VMSTRUCTS_G1_HPP