void ThreadLocalAllocBuffer::accumulate_statistics_before_gc() {
global_stats()->initialize();
#ifdef COLORED_TLABS
if(UseColoredSpaces) {
for(JavaThread *thread = Threads::first(); thread; thread = thread->next()) {
//tty->print("early: %p\n", thread);
thread->tlab(HC_RED).accumulate_statistics();
thread->tlab(HC_RED).initialize_statistics();
thread->tlab(HC_BLUE).accumulate_statistics();
thread->tlab(HC_BLUE).initialize_statistics();
}
} else {
for(JavaThread *thread = Threads::first(); thread; thread = thread->next()) {
//tty->print("early: %p\n", thread);
thread->tlab().accumulate_statistics();
thread->tlab().initialize_statistics();
}
}
#else
for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) {
thread->tlab().accumulate_statistics();
thread->tlab().initialize_statistics();
}
#endif
// Publish new stats if some allocation occurred.
if (global_stats()->allocation() != 0) {
global_stats()->publish();
if (PrintTLAB) {
global_stats()->print();
}
}
}
void ThreadLocalAllocBuffer::accumulate_statistics_before_gc() {
global_stats()->initialize();
for(JavaThread *thread = Threads::first(); thread; thread = thread->next()) {
thread->tlab().accumulate_statistics();
thread->tlab().initialize_statistics();
}
// Publish new stats if some allocation occurred.
if (global_stats()->allocation() != 0) {
global_stats()->publish();
if (PrintTLAB) {
global_stats()->print();
}
}
}
size_t ThreadLocalAllocBuffer::initial_desired_size() {
size_t init_sz = 0;
if (TLABSize > 0) {
init_sz = TLABSize / HeapWordSize;
} else if (global_stats() != NULL) {
// Initial size is a function of the average number of allocating threads.
unsigned nof_threads = global_stats()->allocating_threads_avg();
init_sz = (Universe::heap()->tlab_capacity(myThread()) / HeapWordSize) /
(nof_threads * target_refills());
init_sz = align_object_size(init_sz);
}
init_sz = MIN2(MAX2(init_sz, min_size()), max_size());
return init_sz;
}
void ThreadLocalAllocBuffer::accumulate_statistics() {
Thread* thread = myThread();
size_t capacity = Universe::heap()->tlab_capacity(thread);
size_t used = Universe::heap()->tlab_used(thread);
_gc_waste += (unsigned)remaining();
size_t total_allocated = thread->allocated_bytes();
size_t allocated_since_last_gc = total_allocated - _allocated_before_last_gc;
_allocated_before_last_gc = total_allocated;
if (PrintTLAB && (_number_of_refills > 0 || Verbose)) {
print_stats("gc");
}
if (_number_of_refills > 0) {
// Update allocation history if a reasonable amount of eden was allocated.
bool update_allocation_history = used > 0.5 * capacity;
if (update_allocation_history) {
// Average the fraction of eden allocated in a tlab by this
// thread for use in the next resize operation.
// _gc_waste is not subtracted because it's included in
// "used".
// The result can be larger than 1.0 due to direct to old allocations.
// These allocations should ideally not be counted but since it is not possible
// to filter them out here we just cap the fraction to be at most 1.0.
double alloc_frac = MIN2(1.0, (double) allocated_since_last_gc / used);
_allocation_fraction.sample(alloc_frac);
}
global_stats()->update_allocating_threads();
global_stats()->update_number_of_refills(_number_of_refills);
global_stats()->update_allocation(_number_of_refills * desired_size());
global_stats()->update_gc_waste(_gc_waste);
global_stats()->update_slow_refill_waste(_slow_refill_waste);
global_stats()->update_fast_refill_waste(_fast_refill_waste);
} else {
assert(_number_of_refills == 0 && _fast_refill_waste == 0 &&
_slow_refill_waste == 0 && _gc_waste == 0,
"tlab stats == 0");
}
global_stats()->update_slow_allocations(_slow_allocations);
}
void ThreadLocalAllocBuffer::accumulate_statistics() {
size_t capacity = Universe::heap()->tlab_capacity(myThread()) / HeapWordSize;
size_t unused = Universe::heap()->unsafe_max_tlab_alloc(myThread()) / HeapWordSize;
size_t used = capacity - unused;
// Update allocation history if a reasonable amount of eden was allocated.
bool update_allocation_history = used > 0.5 * capacity;
_gc_waste += (unsigned)remaining();
if (PrintTLAB && (_number_of_refills > 0 || Verbose)) {
print_stats("gc");
}
if (_number_of_refills > 0) {
if (update_allocation_history) {
// Average the fraction of eden allocated in a tlab by this
// thread for use in the next resize operation.
// _gc_waste is not subtracted because it's included in
// "used".
size_t allocation = _number_of_refills * desired_size();
double alloc_frac = allocation / (double) used;
_allocation_fraction.sample(alloc_frac);
}
global_stats()->update_allocating_threads();
global_stats()->update_number_of_refills(_number_of_refills);
global_stats()->update_allocation(_number_of_refills * desired_size());
global_stats()->update_gc_waste(_gc_waste);
global_stats()->update_slow_refill_waste(_slow_refill_waste);
global_stats()->update_fast_refill_waste(_fast_refill_waste);
} else {
assert(_number_of_refills == 0 && _fast_refill_waste == 0 &&
_slow_refill_waste == 0 && _gc_waste == 0,
"tlab stats == 0");
}
global_stats()->update_slow_allocations(_slow_allocations);
}
