void ConcurrentG1RefineThread::sample_young_list_rs_lengths() {
SuspendibleThreadSetJoiner sts;
G1CollectedHeap* g1h = G1CollectedHeap::heap();
G1CollectorPolicy* g1p = g1h->g1_policy();
if (g1p->adaptive_young_list_length()) {
int regions_visited = 0;
g1h->young_list()->rs_length_sampling_init();
while (g1h->young_list()->rs_length_sampling_more()) {
g1h->young_list()->rs_length_sampling_next();
++regions_visited;
// we try to yield every time we visit 10 regions
if (regions_visited == 10) {
if (sts.should_yield()) {
sts.yield();
// we just abandon the iteration
break;
}
regions_visited = 0;
}
}
g1p->revise_young_list_target_length_if_necessary();
}
}
void G1StringDedupThread::run() {
G1StringDedupStat total_stat;
initialize_in_thread();
wait_for_universe_init();
// Main loop
for (;;) {
G1StringDedupStat stat;
stat.mark_idle();
// Wait for the queue to become non-empty
G1StringDedupQueue::wait();
if (_should_terminate) {
break;
}
{
// Include thread in safepoints
SuspendibleThreadSetJoiner sts;
stat.mark_exec();
// Process the queue
for (;;) {
oop java_string = G1StringDedupQueue::pop();
if (java_string == NULL) {
break;
}
G1StringDedupTable::deduplicate(java_string, stat);
// Safepoint this thread if needed
if (sts.should_yield()) {
stat.mark_block();
sts.yield();
stat.mark_unblock();
}
}
stat.mark_done();
// Print statistics
total_stat.add(stat);
print(gclog_or_tty, stat, total_stat);
}
G1StringDedupTable::clean_entry_cache();
}
terminate();
}
