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src/hotspot/share/gc/shared/threadLocalAllocBuffer.hpp
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rev 49643 : [mq]: heap8
rev 49644 : [mq]: event_rebased
rev 49649 : [mq]: heap14
@@ -36,23 +36,23 @@
// the threads for allocation.
// It is thread-private at any time, but maybe multiplexed over
// time across multiple threads. The park()/unpark() pair is
// used to make it available for such multiplexing.
//
-// Heap sampling is performed via the current_end/allocation_end
+// Heap sampling is performed via the fast_path_end/allocation_end
// fields.
// allocation_end contains the real end of the tlab allocation,
-// whereas current_end can be set to an arbitrary spot in the tlab to
+// whereas fast_path_end can be set to an arbitrary spot in the tlab to
// trip the return and sample the allocation.
class ThreadLocalAllocBuffer: public CHeapObj<mtThread> {
friend class VMStructs;
friend class JVMCIVMStructs;
private:
HeapWord* _start; // address of TLAB
HeapWord* _top; // address after last allocation
HeapWord* _pf_top; // allocation prefetch watermark
- HeapWord* _current_end; // allocation end (can be the sampling end point or _allocation_end)
+ HeapWord* _fast_path_end; // allocation end (can be the sampling end point or _allocation_end)
HeapWord* _allocation_end; // end for allocations (actual TLAB end, excluding alignment_reserve)
size_t _desired_size; // desired size (including alignment_reserve)
size_t _refill_waste_limit; // hold onto tlab if free() is larger than this
size_t _allocated_before_last_gc; // total bytes allocated up until the last gc
@@ -72,11 +72,11 @@
void accumulate_statistics();
void initialize_statistics();
void set_start(HeapWord* start) { _start = start; }
- void set_current_end(HeapWord* current_end) { _current_end = current_end; }
+ void set_fast_path_end(HeapWord* fast_path_end){ _fast_path_end = fast_path_end; }
void set_allocation_end(HeapWord* ptr) { _allocation_end = ptr; }
void set_top(HeapWord* top) { _top = top; }
void set_pf_top(HeapWord* pf_top) { _pf_top = pf_top; }
void set_desired_size(size_t desired_size) { _desired_size = desired_size; }
void set_refill_waste_limit(size_t waste) { _refill_waste_limit = waste; }
@@ -92,11 +92,11 @@
void reset();
// Resize based on amount of allocation, etc.
void resize();
- void invariants() const { assert(top() >= start() && top() <= current_end(), "invalid tlab"); }
+ void invariants() const { assert(top() >= start() && top() <= fast_path_end(), "invalid tlab"); }
void initialize(HeapWord* start, HeapWord* top, HeapWord* end);
void print_stats(const char* tag);
@@ -122,18 +122,18 @@
static size_t max_size() { assert(_max_size != 0, "max_size not set up"); return _max_size; }
static size_t max_size_in_bytes() { return max_size() * BytesPerWord; }
static void set_max_size(size_t max_size) { _max_size = max_size; }
HeapWord* start() const { return _start; }
- HeapWord* current_end() const { return _current_end; }
+ HeapWord* fast_path_end() const { return _fast_path_end; }
HeapWord* top() const { return _top; }
- HeapWord* reserved_end();
+ HeapWord* hard_end();
HeapWord* pf_top() const { return _pf_top; }
size_t desired_size() const { return _desired_size; }
size_t used() const { return pointer_delta(top(), start()); }
size_t used_bytes() const { return pointer_delta(top(), start(), 1); }
- size_t free() const { return pointer_delta(current_end(), top()); }
+ size_t free() const { return pointer_delta(fast_path_end(), top()); }
// Don't discard tlab if remaining space is larger than this.
size_t refill_waste_limit() const { return _refill_waste_limit; }
size_t bytes_since_last_sample_point() const { return _bytes_since_last_sample_point; }
// Allocate size HeapWords. The memory is NOT initialized to zero.
@@ -179,11 +179,11 @@
static size_t refill_waste_limit_increment() { return TLABWasteIncrement; }
// Code generation support
static ByteSize start_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _start); }
- static ByteSize current_end_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _current_end ); }
+ static ByteSize fast_path_end_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _fast_path_end ); }
static ByteSize top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _top ); }
static ByteSize pf_top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _pf_top ); }
static ByteSize size_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _desired_size ); }
static ByteSize refill_waste_limit_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _refill_waste_limit ); }
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