< prev index next >
src/hotspot/share/memory/heap.hpp
Print this page
rev 54830 : 8223444: Improve CodeHeap Free Space Management
Reviewed-by:
@@ -49,10 +49,12 @@
};
public:
// Initialization
void initialize(size_t length) { _header._length = length; set_used(); }
+ // Merging/splitting
+ void set_length(size_t length) { _header._length = length; }
// Accessors
void* allocated_space() const { return (void*)(this + 1); }
size_t length() const { return _header._length; }
@@ -69,13 +71,10 @@
public:
// Initialization
void initialize(size_t length) { HeapBlock::initialize(length); _link= NULL; }
- // Merging
- void set_length(size_t l) { _header._length = l; }
-
// Accessors
FreeBlock* link() const { return _link; }
void set_link(FreeBlock* link) { _link = link; }
};
@@ -123,11 +122,11 @@
void insert_after(FreeBlock* a, FreeBlock* b);
bool merge_right (FreeBlock* a);
// Toplevel freelist management
void add_to_freelist(HeapBlock* b);
- FreeBlock* search_freelist(size_t length);
+ HeapBlock* search_freelist(size_t length);
// Iteration helpers
void* next_used(HeapBlock* b) const;
HeapBlock* block_start(void* p) const;
@@ -178,10 +177,11 @@
static size_t header_size(); // returns the header size for each heap block
size_t segment_size() const { return _segment_size; } // for CodeHeapState
HeapBlock* first_block() const; // for CodeHeapState
HeapBlock* next_block(HeapBlock* b) const; // for CodeHeapState
+ HeapBlock* split_block(HeapBlock* b, size_t split_seg); // split one block into two
FreeBlock* freelist() const { return _freelist; } // for CodeHeapState
size_t allocated_in_freelist() const { return _freelist_segments * CodeCacheSegmentSize; }
int freelist_length() const { return _freelist_length; } // number of elements in the freelist
< prev index next >