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8272773: Configurable card table card size

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Reviewed-by: tschatzl, ayang
This commit is contained in:
Vishal Chand 2021-11-20 10:03:45 +00:00 • committed by Thomas Schatzl
parent 1d7cef33c5
commit 1c215f3369
13 changed files with 111 additions and 24 deletions
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33
src/hotspot/share/gc/shared/cardTable.cpp
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@ -25,6 +25,8 @@
#include "precompiled.hpp"
#include "gc/shared/cardTable.hpp"
#include "gc/shared/collectedHeap.hpp"
#include "gc/shared/gcLogPrecious.hpp"
#include "gc/shared/gc_globals.hpp"
#include "gc/shared/space.inline.hpp"
#include "logging/log.hpp"
#include "memory/virtualspace.hpp"
@ -32,6 +34,32 @@
#include "runtime/os.hpp"
#include "services/memTracker.hpp"
#include "utilities/align.hpp"
#if INCLUDE_PARALLELGC
#include "gc/parallel/objectStartArray.hpp"
#endif
uint CardTable::card_shift = 0;
uint CardTable::card_size = 0;
uint CardTable::card_size_in_words = 0;
void CardTable::initialize_card_size() {
assert(UseG1GC || UseParallelGC || UseSerialGC,
"Initialize card size should only be called by card based collectors.");
card_size = GCCardSizeInBytes;
card_shift = log2i_exact(card_size);
card_size_in_words = card_size / sizeof(HeapWord);
// Set blockOffsetTable size based on card table entry size
BOTConstants::initialize_bot_size(card_shift);
#if INCLUDE_PARALLELGC
// Set ObjectStartArray block size based on card table entry size
ObjectStartArray::initialize_block_size(card_shift);
#endif
log_info_p(gc, init)("CardTable entry size: " UINT32_FORMAT, card_size);
}
size_t CardTable::compute_byte_map_size() {
assert(_guard_index == cards_required(_whole_heap.word_size()) - 1,
@ -56,8 +84,6 @@ CardTable::CardTable(MemRegion whole_heap) :
{
assert((uintptr_t(_whole_heap.start()) & (card_size - 1)) == 0, "heap must start at card boundary");
assert((uintptr_t(_whole_heap.end()) & (card_size - 1)) == 0, "heap must end at card boundary");
assert(card_size <= 512, "card_size must be less than 512"); // why?
}
CardTable::~CardTable() {
@ -428,7 +454,8 @@ MemRegion CardTable::dirty_card_range_after_reset(MemRegion mr,
}
uintx CardTable::ct_max_alignment_constraint() {
return card_size * os::vm_page_size();
// Calculate maximum alignment using GCCardSizeInBytes as card_size hasn't been set yet
return GCCardSizeInBytes * os::vm_page_size();
}
void CardTable::verify_guard() {