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src/hotspot/share/runtime/thread.hpp

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rev 56044 : imported patch 8230184.patch
rev 56046 : v2.00 -> v2.05 (CR5/v2.05/8-for-jdk13) patches combined into one; merge with 8229212.patch; merge with jdk-14+11; merge with 8230184.patch.
rev 56048 : Add OM_CACHE_LINE_SIZE so that ObjectMonitor cache line sizes can be experimented with independently of DEFAULT_CACHE_LINE_SIZE; for SPARC and X64 configs that use 128 for DEFAULT_CACHE_LINE_SIZE, we are experimenting with 64; move _previous_owner_tid and _allocation_state fields to share the cache line with ObjectMonitor::_header; put ObjectMonitor::_ref_count on its own cache line after _owner; add 'int* count_p' parameter to deflate_monitor_list() and deflate_monitor_list_using_JT() and push counter updates down to where the ObjectMonitors are actually removed from the in-use lists; monitors_iterate() async deflation check should use negative ref_count; add 'JavaThread* target' param to deflate_per_thread_idle_monitors_using_JT() add deflate_common_idle_monitors_using_JT() to make it clear which JavaThread* is the target of the work and which is the calling JavaThread* (self); g_free_list, g_om_in_use_list and g_om_in_use_count are now static to synchronizer.cpp (reduce scope); add more diagnostic info to some assert()'s; minor code cleanups and code motion; save_om_ptr() should detect a race with a deflating thread that is bailing out and cause a retry when the ref_count field is not positive; merge with jdk-14+11; add special GC support for TestHumongousClassLoader.java; merge with 8230184.patch.
rev 56049 : Merge the remainder of the lock-free monitor list changes from v2.06 with v2.06a and v2.06b after running the changes through the edit scripts; merge pieces from dcubed.monitor_deflate_conc.v2.06d in dcubed.monitor_deflate_conc.v2.06[ac]; merge pieces from dcubed.monitor_deflate_conc.v2.06e into dcubed.monitor_deflate_conc.v2.06c; merge with jdk-14+11; test work around for test/jdk/tools/jlink/multireleasejar/JLinkMultiReleaseJarTest.java should not been needed anymore.


 393   jlong _allocated_bytes;                       // Cumulative number of bytes allocated on
 394                                                 // the Java heap
 395   ThreadHeapSampler _heap_sampler;              // For use when sampling the memory.
 396 
 397   ThreadStatisticalInfo _statistical_info;      // Statistics about the thread
 398 
 399   JFR_ONLY(DEFINE_THREAD_LOCAL_FIELD_JFR;)      // Thread-local data for jfr
 400 
 401   int   _vm_operation_started_count;            // VM_Operation support
 402   int   _vm_operation_completed_count;          // VM_Operation support
 403 
 404   ObjectMonitor* _current_pending_monitor;      // ObjectMonitor this thread
 405                                                 // is waiting to lock
 406   bool _current_pending_monitor_is_from_java;   // locking is from Java code
 407 
 408   // ObjectMonitor on which this thread called Object.wait()
 409   ObjectMonitor* _current_waiting_monitor;
 410 
 411   // Per-thread ObjectMonitor lists:
 412  public:
 413   ObjectMonitor* om_free_list;                  // SLL of free ObjectMonitors
 414   int om_free_count;                            // # on om_free_list
 415   int om_free_provision;                        // # to try to allocate next
 416   ObjectMonitor* om_in_use_list;                // SLL of in-use ObjectMonitors
 417   int om_in_use_count;                          // # on om_in_use_list
 418   volatile bool om_request_deflation;           // request deflation of idle monitors
 419 
 420 #ifdef ASSERT
 421  private:
 422   volatile uint64_t _visited_for_critical_count;
 423 
 424  public:
 425   void set_visited_for_critical_count(uint64_t safepoint_id) {
 426     assert(_visited_for_critical_count == 0, "Must be reset before set");
 427     assert((safepoint_id & 0x1) == 1, "Must be odd");
 428     _visited_for_critical_count = safepoint_id;
 429   }
 430   void reset_visited_for_critical_count(uint64_t safepoint_id) {
 431     assert(_visited_for_critical_count == safepoint_id, "Was not visited");
 432     _visited_for_critical_count = 0;
 433   }
 434   bool was_visited_for_critical_count(uint64_t safepoint_id) const {
 435     return _visited_for_critical_count == safepoint_id;
 436   }
 437 #endif
 438 




 393   jlong _allocated_bytes;                       // Cumulative number of bytes allocated on
 394                                                 // the Java heap
 395   ThreadHeapSampler _heap_sampler;              // For use when sampling the memory.
 396 
 397   ThreadStatisticalInfo _statistical_info;      // Statistics about the thread
 398 
 399   JFR_ONLY(DEFINE_THREAD_LOCAL_FIELD_JFR;)      // Thread-local data for jfr
 400 
 401   int   _vm_operation_started_count;            // VM_Operation support
 402   int   _vm_operation_completed_count;          // VM_Operation support
 403 
 404   ObjectMonitor* _current_pending_monitor;      // ObjectMonitor this thread
 405                                                 // is waiting to lock
 406   bool _current_pending_monitor_is_from_java;   // locking is from Java code
 407 
 408   // ObjectMonitor on which this thread called Object.wait()
 409   ObjectMonitor* _current_waiting_monitor;
 410 
 411   // Per-thread ObjectMonitor lists:
 412  public:
 413   ObjectMonitor* volatile om_free_list;         // SLL of free ObjectMonitors
 414   volatile int om_free_count;                   // # on om_free_list
 415   int om_free_provision;                        // # to try to allocate next
 416   ObjectMonitor* volatile om_in_use_list;       // SLL of in-use ObjectMonitors
 417   volatile int om_in_use_count;                 // # on om_in_use_list

 418 
 419 #ifdef ASSERT
 420  private:
 421   volatile uint64_t _visited_for_critical_count;
 422 
 423  public:
 424   void set_visited_for_critical_count(uint64_t safepoint_id) {
 425     assert(_visited_for_critical_count == 0, "Must be reset before set");
 426     assert((safepoint_id & 0x1) == 1, "Must be odd");
 427     _visited_for_critical_count = safepoint_id;
 428   }
 429   void reset_visited_for_critical_count(uint64_t safepoint_id) {
 430     assert(_visited_for_critical_count == safepoint_id, "Was not visited");
 431     _visited_for_critical_count = 0;
 432   }
 433   bool was_visited_for_critical_count(uint64_t safepoint_id) const {
 434     return _visited_for_critical_count == safepoint_id;
 435   }
 436 #endif
 437 


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