src/share/vm/runtime/sweeper.hpp
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*** old/src/share/vm/runtime/sweeper.hpp Thu Nov 7 12:05:04 2013
--- new/src/share/vm/runtime/sweeper.hpp Thu Nov 7 12:05:04 2013
*** 52,76 ****
--- 52,76 ----
// compilations or at least each 5 sec (NmethodSweepCheckInterval) when the code cache
// is full.
class NMethodSweeper : public AllStatic {
static long _traversals; // Stack scan count, also sweep ID.
+ static long _time_counter; // Virtual time used to periodically invoke sweeper
+ static long _last_sweep; // Value of _traversals when the last sweep happened
static nmethod* _current; // Current nmethod
static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
static int _flushed_count; // Nof. nmethods flushed in current sweep
static int _zombified_count; // Nof. nmethods made zombie in current sweep
! static int _marked_count; // Nof. nmethods marked for reclaim in current sweep
! static int _marked_for_reclamation_count; // Nof. nmethods marked for reclaim in current sweep
! static volatile int _invocations; // No. of invocations left until we are completed with this pass
! static volatile int _invocations; // Nof. invocations left until we are completed with this pass
static volatile int _sweep_started; // Flag to control conc sweeper
//The following are reset in mark_active_nmethods and synchronized by the safepoint
static bool _request_mark_phase; // Indicates that a change has happend and we need another mark pahse,
// always checked and reset at a safepoint so memory will be in sync.
static int _locked_seen; // Number of locked nmethods encountered during the scan
static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
+ static volatile bool _should_sweep; // Indicates if we should invoke the sweeper
+ static volatile int _bytes_changed; // Counts the total nmethod size if the nmethod changed from:
+ // 1) alive -> not_entrant
+ // 2) not_entrant -> zombie
+ // 3) zombie -> marked_for_reclamation
// Stat counters
static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed
static jlong _total_time_sweeping; // Accumulated time sweeping
static jlong _total_time_this_sweep; // Total time this sweep
static jlong _peak_sweep_time; // Peak time for a full sweep
*** 79,91 ****
--- 79,88 ----
static int process_nmethod(nmethod *nm);
static void release_nmethod(nmethod* nm);
static bool sweep_in_progress();
static void sweep_code_cache();
static void request_nmethod_marking() { _request_mark_phase = true; }
static void reset_nmethod_marking() { _request_mark_phase = false; }
static bool need_marking_phase() { return _request_mark_phase; }
static int _hotness_counter_reset_val;
public:
static long traversal_count() { return _traversals; }
*** 107,121 ****
--- 104,111 ----
static void mark_active_nmethods(); // Invoked at the end of each safepoint
static void possibly_sweep(); // Compiler threads call this to sweep
static int sort_nmethods_by_hotness(nmethod** nm1, nmethod** nm2);
static int hotness_counter_reset_val();
static void notify() {
// Request a new sweep of the code cache from the beginning. No
// need to synchronize the setting of this flag since it only
// changes to false at safepoint so we can never overwrite it with false.
request_nmethod_marking();
}
};
#endif // SHARE_VM_RUNTIME_SWEEPER_HPP
src/share/vm/runtime/sweeper.hpp
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