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comparison src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp @ 5963:64bf7c8270cb

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7147724: G1: hang in SurrogateLockerThread::manipulatePLL Summary: Attempting to initiate a marking cycle when allocating a humongous object can, if a marking cycle is successfully initiated by another thread, result in the allocating thread spinning until the marking cycle is complete. Eliminate a deadlock between the main ConcurrentMarkThread, the SurrogateLocker thread, the VM thread, and a mutator thread waiting on the SecondaryFreeList_lock (while free regions are going to become available) by not manipulating the pending list lock during the prologue and epilogue of the cleanup pause. Reviewed-by: brutisso, jcoomes, tonyp
author johnc
date Mon, 12 Mar 2012 14:59:00 -0700
parents eff609af17d7
children 5c86f8211d1e
comparison
equal deleted inserted replaced
5962:8a729074feae 5963:64bf7c8270cb
153 mark_end_sec - mark_start_sec); 153 mark_end_sec - mark_start_sec);
154 } 154 }
155 155
156 CMCheckpointRootsFinalClosure final_cl(_cm); 156 CMCheckpointRootsFinalClosure final_cl(_cm);
157 sprintf(verbose_str, "GC remark"); 157 sprintf(verbose_str, "GC remark");
158 VM_CGC_Operation op(&final_cl, verbose_str); 158 VM_CGC_Operation op(&final_cl, verbose_str, true /* needs_pll */);
159 VMThread::execute(&op); 159 VMThread::execute(&op);
160 } 160 }
161 if (cm()->restart_for_overflow() && 161 if (cm()->restart_for_overflow() &&
162 G1TraceMarkStackOverflow) { 162 G1TraceMarkStackOverflow) {
163 gclog_or_tty->print_cr("Restarting conc marking because of MS overflow " 163 gclog_or_tty->print_cr("Restarting conc marking because of MS overflow "
187 os::sleep(current_thread, sleep_time_ms, false); 187 os::sleep(current_thread, sleep_time_ms, false);
188 } 188 }
189 189
190 CMCleanUp cl_cl(_cm); 190 CMCleanUp cl_cl(_cm);
191 sprintf(verbose_str, "GC cleanup"); 191 sprintf(verbose_str, "GC cleanup");
192 VM_CGC_Operation op(&cl_cl, verbose_str); 192 VM_CGC_Operation op(&cl_cl, verbose_str, false /* needs_pll */);
193 VMThread::execute(&op); 193 VMThread::execute(&op);
194 } else { 194 } else {
195 // We don't want to update the marking status if a GC pause 195 // We don't want to update the marking status if a GC pause
196 // is already underway. 196 // is already underway.
197 _sts.join(); 197 _sts.join();