76 void accumulate_statistics();
77 void initialize_statistics();
78
79 void set_start(HeapWord* start) { _start = start; }
80 void set_end(HeapWord* end) { _end = end; }
81 void set_actual_end(HeapWord* actual_end) { _actual_end = actual_end; }
82 void set_slow_path_end(HeapWord* slow_path_end) { _slow_path_end = slow_path_end; }
83 void set_top(HeapWord* top) { _top = top; }
84 void set_pf_top(HeapWord* pf_top) { _pf_top = pf_top; }
85 void set_desired_size(size_t desired_size) { _desired_size = desired_size; }
86 void set_refill_waste_limit(size_t waste) { _refill_waste_limit = waste; }
87 void set_bytes_until_sample(size_t bytes) { _bytes_until_sample = bytes; }
88
89 size_t initial_refill_waste_limit() { return desired_size() / TLABRefillWasteFraction; }
90
91 static int target_refills() { return _target_refills; }
92 size_t initial_desired_size();
93
94 size_t remaining() { return end() == NULL ? 0 : pointer_delta(hard_end(), top()); }
95
96 // Make parsable and release it.
97 void reset();
98
99 // Resize based on amount of allocation, etc.
100 void resize();
101
102 void invariants() const { assert(top() >= start() && top() <= end(), "invalid tlab"); }
103
104 void initialize(HeapWord* start, HeapWord* top, HeapWord* end);
105
106 void print_stats(const char* tag);
107
108 Thread* myThread();
109
110 // statistics
111
112 int number_of_refills() const { return _number_of_refills; }
113 int fast_refill_waste() const { return _fast_refill_waste; }
114 int slow_refill_waste() const { return _slow_refill_waste; }
115 int gc_waste() const { return _gc_waste; }
116 int slow_allocations() const { return _slow_allocations; }
117
118 static GlobalTLABStats* _global_stats;
119 static GlobalTLABStats* global_stats() { return _global_stats; }
120
121 public:
122 ThreadLocalAllocBuffer() : _allocation_fraction(TLABAllocationWeight), _allocated_before_last_gc(0) {
123 // do nothing. tlabs must be inited by initialize() calls
124 }
125
126 static size_t min_size() { return align_object_size(MinTLABSize / HeapWordSize) + alignment_reserve(); }
127 static size_t max_size() { assert(_max_size != 0, "max_size not set up"); return _max_size; }
128 static size_t max_size_in_bytes() { return max_size() * BytesPerWord; }
129 static void set_max_size(size_t max_size) { _max_size = max_size; }
130
131 HeapWord* start() const { return _start; }
132 HeapWord* end() const { return _end; }
133 HeapWord* slow_path_end() const { return _slow_path_end; }
134 HeapWord* actual_end() const { return _actual_end; }
135 HeapWord* hard_end();
136 HeapWord* top() const { return _top; }
137 HeapWord* pf_top() const { return _pf_top; }
138 size_t desired_size() const { return _desired_size; }
139 size_t used() const { return pointer_delta(top(), start()); }
140 size_t used_bytes() const { return pointer_delta(top(), start(), 1); }
141 size_t free() const { return pointer_delta(end(), top()); }
142 // Don't discard tlab if remaining space is larger than this.
143 size_t refill_waste_limit() const { return _refill_waste_limit; }
144
145 // Allocate size HeapWords. The memory is NOT initialized to zero.
146 inline HeapWord* allocate(size_t size);
147
148 // Reserve space at the end of TLAB
149 static size_t end_reserve() {
150 int reserve_size = typeArrayOopDesc::header_size(T_INT);
151 return MAX2(reserve_size, _reserve_for_allocation_prefetch);
152 }
153 static size_t alignment_reserve() { return align_object_size(end_reserve()); }
154 static size_t alignment_reserve_in_bytes() { return alignment_reserve() * HeapWordSize; }
155
163
164 // Initialization at startup
165 static void startup_initialization();
166
167 // Make an in-use tlab parsable, optionally retiring and/or zapping it.
168 void make_parsable(bool retire, bool zap = true);
169
170 // Retire in-use tlab before allocation of a new tlab
171 void clear_before_allocation();
172
173 // Accumulate statistics across all tlabs before gc
174 static void accumulate_statistics_before_gc();
175
176 // Resize tlabs for all threads
177 static void resize_all_tlabs();
178
179 void fill(HeapWord* start, HeapWord* top, size_t new_size);
180 void initialize();
181
182 void pick_next_sample(size_t diff = 0);
183 void set_sample_end();
184 void set_back_actual_end();
185 void handle_sample(Thread* thread, HeapWord* result, size_t size);
186 size_t bytes_until_sample() { return _bytes_until_sample; }
187 size_t *bytes_until_sample_addr() { return &_bytes_until_sample; }
188 bool should_sample() { return bytes_until_sample() == 0; }
189
190 static size_t refill_waste_limit_increment() { return TLABWasteIncrement; }
191
192 // Code generation support
193 static ByteSize start_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _start); }
194 static ByteSize end_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _end ); }
195 static ByteSize actual_end_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _actual_end ); }
196 static ByteSize top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _top ); }
197 static ByteSize pf_top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _pf_top ); }
198 static ByteSize size_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _desired_size ); }
199 static ByteSize refill_waste_limit_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _refill_waste_limit ); }
200
201 static ByteSize number_of_refills_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _number_of_refills ); }
202 static ByteSize fast_refill_waste_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _fast_refill_waste ); }
203 static ByteSize slow_allocations_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _slow_allocations ); }
204
205 void verify();
206 };
207
208 class GlobalTLABStats: public CHeapObj<mtThread> {
209 private:
210
211 // Accumulate perfdata in private variables because
212 // PerfData should be write-only for security reasons
213 // (see perfData.hpp)
214 unsigned _allocating_threads;
215 unsigned _total_refills;
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76 void accumulate_statistics();
77 void initialize_statistics();
78
79 void set_start(HeapWord* start) { _start = start; }
80 void set_end(HeapWord* end) { _end = end; }
81 void set_actual_end(HeapWord* actual_end) { _actual_end = actual_end; }
82 void set_slow_path_end(HeapWord* slow_path_end) { _slow_path_end = slow_path_end; }
83 void set_top(HeapWord* top) { _top = top; }
84 void set_pf_top(HeapWord* pf_top) { _pf_top = pf_top; }
85 void set_desired_size(size_t desired_size) { _desired_size = desired_size; }
86 void set_refill_waste_limit(size_t waste) { _refill_waste_limit = waste; }
87 void set_bytes_until_sample(size_t bytes) { _bytes_until_sample = bytes; }
88
89 size_t initial_refill_waste_limit() { return desired_size() / TLABRefillWasteFraction; }
90
91 static int target_refills() { return _target_refills; }
92 size_t initial_desired_size();
93
94 size_t remaining() { return end() == NULL ? 0 : pointer_delta(hard_end(), top()); }
95
96 // Obtain the actual end of the TLAB.
97 HeapWord* hard_end();
98 void set_sample_end();
99
100 // Make parsable and release it.
101 void reset();
102
103 // Resize based on amount of allocation, etc.
104 void resize();
105
106 void invariants() const { assert(top() >= start() && top() <= end(), "invalid tlab"); }
107
108 void initialize(HeapWord* start, HeapWord* top, HeapWord* end);
109
110 void print_stats(const char* tag);
111
112 Thread* myThread();
113
114 // statistics
115
116 int number_of_refills() const { return _number_of_refills; }
117 int fast_refill_waste() const { return _fast_refill_waste; }
118 int slow_refill_waste() const { return _slow_refill_waste; }
119 int gc_waste() const { return _gc_waste; }
120 int slow_allocations() const { return _slow_allocations; }
121
122 static GlobalTLABStats* _global_stats;
123 static GlobalTLABStats* global_stats() { return _global_stats; }
124
125 public:
126 ThreadLocalAllocBuffer() : _allocation_fraction(TLABAllocationWeight), _allocated_before_last_gc(0) {
127 // do nothing. tlabs must be inited by initialize() calls
128 }
129
130 static size_t min_size() { return align_object_size(MinTLABSize / HeapWordSize) + alignment_reserve(); }
131 static size_t max_size() { assert(_max_size != 0, "max_size not set up"); return _max_size; }
132 static size_t max_size_in_bytes() { return max_size() * BytesPerWord; }
133 static void set_max_size(size_t max_size) { _max_size = max_size; }
134
135 HeapWord* start() const { return _start; }
136 HeapWord* end() const { return _end; }
137 HeapWord* top() const { return _top; }
138 HeapWord* pf_top() const { return _pf_top; }
139 size_t desired_size() const { return _desired_size; }
140 size_t used() const { return pointer_delta(top(), start()); }
141 size_t used_bytes() const { return pointer_delta(top(), start(), 1); }
142 size_t free() const { return pointer_delta(end(), top()); }
143 // Don't discard tlab if remaining space is larger than this.
144 size_t refill_waste_limit() const { return _refill_waste_limit; }
145
146 // Allocate size HeapWords. The memory is NOT initialized to zero.
147 inline HeapWord* allocate(size_t size);
148
149 // Reserve space at the end of TLAB
150 static size_t end_reserve() {
151 int reserve_size = typeArrayOopDesc::header_size(T_INT);
152 return MAX2(reserve_size, _reserve_for_allocation_prefetch);
153 }
154 static size_t alignment_reserve() { return align_object_size(end_reserve()); }
155 static size_t alignment_reserve_in_bytes() { return alignment_reserve() * HeapWordSize; }
156
164
165 // Initialization at startup
166 static void startup_initialization();
167
168 // Make an in-use tlab parsable, optionally retiring and/or zapping it.
169 void make_parsable(bool retire, bool zap = true);
170
171 // Retire in-use tlab before allocation of a new tlab
172 void clear_before_allocation();
173
174 // Accumulate statistics across all tlabs before gc
175 static void accumulate_statistics_before_gc();
176
177 // Resize tlabs for all threads
178 static void resize_all_tlabs();
179
180 void fill(HeapWord* start, HeapWord* top, size_t new_size);
181 void initialize();
182
183 void pick_next_sample(size_t diff = 0);
184 void set_back_actual_end();
185 void handle_sample(Thread* thread, HeapWord* result, size_t size);
186 bool should_sample() { return _bytes_until_sample == 0; }
187
188 static size_t refill_waste_limit_increment() { return TLABWasteIncrement; }
189
190 // Code generation support
191 static ByteSize start_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _start); }
192 static ByteSize end_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _end ); }
193 static ByteSize top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _top ); }
194 static ByteSize pf_top_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _pf_top ); }
195 static ByteSize size_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _desired_size ); }
196 static ByteSize refill_waste_limit_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _refill_waste_limit ); }
197
198 static ByteSize number_of_refills_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _number_of_refills ); }
199 static ByteSize fast_refill_waste_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _fast_refill_waste ); }
200 static ByteSize slow_allocations_offset() { return byte_offset_of(ThreadLocalAllocBuffer, _slow_allocations ); }
201
202 void verify();
203 };
204
205 class GlobalTLABStats: public CHeapObj<mtThread> {
206 private:
207
208 // Accumulate perfdata in private variables because
209 // PerfData should be write-only for security reasons
210 // (see perfData.hpp)
211 unsigned _allocating_threads;
212 unsigned _total_refills;
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