276 };
277
278 class ZDriverCycleScope : public StackObj {
279 private:
280 GCIdMark _gc_id;
281 GCCauseSetter _gc_cause_setter;
282 ZSoftReferencePolicyScope _soft_ref_policy;
283 ZStatTimer _timer;
284
285 bool should_boost_worker_threads(GCCause::Cause cause) const {
286 return cause == GCCause::_java_lang_system_gc ||
287 cause == GCCause::_z_allocation_stall;
288 }
289
290 public:
291 ZDriverCycleScope(GCCause::Cause cause) :
292 _gc_id(),
293 _gc_cause_setter(ZCollectedHeap::heap(), cause),
294 _soft_ref_policy(cause),
295 _timer(ZPhaseCycle) {
296 const bool boost = should_boost_worker_threads(cause);
297 ZHeap::heap()->set_boost_worker_threads(boost);
298 }
299 };
300
301 void ZDriver::run_gc_cycle(GCCause::Cause cause) {
302 ZDriverCycleScope scope(cause);
303
304 // Phase 1: Pause Mark Start
305 {
306 ZMarkStartClosure cl;
307 vm_operation(&cl);
308 }
309
310 // Phase 2: Concurrent Mark
311 {
312 ZStatTimer timer(ZPhaseConcurrentMark);
313 ZHeap::heap()->mark();
314 }
315
316 // Phase 3: Pause Mark End
317 {
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276 };
277
278 class ZDriverCycleScope : public StackObj {
279 private:
280 GCIdMark _gc_id;
281 GCCauseSetter _gc_cause_setter;
282 ZSoftReferencePolicyScope _soft_ref_policy;
283 ZStatTimer _timer;
284
285 bool should_boost_worker_threads(GCCause::Cause cause) const {
286 return cause == GCCause::_java_lang_system_gc ||
287 cause == GCCause::_z_allocation_stall;
288 }
289
290 public:
291 ZDriverCycleScope(GCCause::Cause cause) :
292 _gc_id(),
293 _gc_cause_setter(ZCollectedHeap::heap(), cause),
294 _soft_ref_policy(cause),
295 _timer(ZPhaseCycle) {
296 // Update statistics
297 ZStatCycle::at_start();
298
299 // Set boost mode
300 const bool boost = should_boost_worker_threads(cause);
301 ZHeap::heap()->set_boost_worker_threads(boost);
302 }
303
304 ~ZDriverCycleScope() {
305 // Calculate boost factor
306 const double boost_factor = (double)ZHeap::heap()->nconcurrent_worker_threads() /
307 (double)ZHeap::heap()->nconcurrent_no_boost_worker_threads();
308
309 // Update statistics
310 ZStatCycle::at_end(boost_factor);
311 }
312 };
313
314 void ZDriver::run_gc_cycle(GCCause::Cause cause) {
315 ZDriverCycleScope scope(cause);
316
317 // Phase 1: Pause Mark Start
318 {
319 ZMarkStartClosure cl;
320 vm_operation(&cl);
321 }
322
323 // Phase 2: Concurrent Mark
324 {
325 ZStatTimer timer(ZPhaseConcurrentMark);
326 ZHeap::heap()->mark();
327 }
328
329 // Phase 3: Pause Mark End
330 {
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