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8319314: NMT detail report slow or hangs for large number of mappings

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Reviewed-by: jsjolen, gziemski
This commit is contained in:
Thomas Stuefe 2023-11-11 06:55:21 +00:00
parent c9077b8b81
commit 9938b3f62b
1 changed files with 13 additions and 10 deletions
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23
src/hotspot/share/nmt/memBaseline.cpp
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@ -110,22 +110,25 @@ class MallocAllocationSiteWalker : public MallocSiteWalker {
}
};
// Compare virtual memory region's base address
int compare_virtual_memory_base(const ReservedMemoryRegion& r1, const ReservedMemoryRegion& r2) {
return r1.compare(r2);
}
// Walk all virtual memory regions for baselining
class VirtualMemoryAllocationWalker : public VirtualMemoryWalker {
private:
SortedLinkedList<ReservedMemoryRegion, compare_virtual_memory_base>
_virtual_memory_regions;
size_t _count;
typedef LinkedListImpl<ReservedMemoryRegion, AnyObj::C_HEAP, mtNMT,
AllocFailStrategy::RETURN_NULL> EntryList;
EntryList _virtual_memory_regions;
size_t _count;
DEBUG_ONLY(address _last_base;)
public:
VirtualMemoryAllocationWalker() : _count(0) { }
VirtualMemoryAllocationWalker() :
_count(0)
#ifdef ASSERT
, _last_base(nullptr)
#endif
{}
bool do_allocation_site(const ReservedMemoryRegion* rgn) {
assert(rgn->base() >= _last_base, "region unordered?");
DEBUG_ONLY(_last_base = rgn->base());
if (rgn->size() > 0) {
if (_virtual_memory_regions.add(*rgn) != nullptr) {
_count ++;