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comparison src/share/vm/runtime/sweeper.hpp @ 14909:4ca6dc0799b6

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Backout jdk9 merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Tue, 01 Apr 2014 13:57:07 +0200
parents 49a31fd8b93d
children 52b4284cb496
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14908:8db6e76cb658 14909:4ca6dc0799b6
52 // nmethod's space is freed. Sweeping is currently done by compiler threads between 52 // nmethod's space is freed. Sweeping is currently done by compiler threads between
53 // compilations or at least each 5 sec (NmethodSweepCheckInterval) when the code cache 53 // compilations or at least each 5 sec (NmethodSweepCheckInterval) when the code cache
54 // is full. 54 // is full.
55 55
56 class NMethodSweeper : public AllStatic { 56 class NMethodSweeper : public AllStatic {
57 static long _traversals; // Stack scan count, also sweep ID. 57 static long _traversals; // Stack scan count, also sweep ID.
58 static long _total_nof_code_cache_sweeps; // Total number of full sweeps of the code cache 58 static long _time_counter; // Virtual time used to periodically invoke sweeper
59 static long _time_counter; // Virtual time used to periodically invoke sweeper 59 static long _last_sweep; // Value of _time_counter when the last sweep happened
60 static long _last_sweep; // Value of _time_counter when the last sweep happened 60 static nmethod* _current; // Current nmethod
61 static nmethod* _current; // Current nmethod 61 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache
62 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache 62 static int _flushed_count; // Nof. nmethods flushed in current sweep
63 static int _flushed_count; // Nof. nmethods flushed in current sweep 63 static int _zombified_count; // Nof. nmethods made zombie in current sweep
64 static int _zombified_count; // Nof. nmethods made zombie in current sweep 64 static int _marked_for_reclamation_count; // Nof. nmethods marked for reclaim in current sweep
65 static int _marked_for_reclamation_count; // Nof. nmethods marked for reclaim in current sweep
66 65
67 static volatile int _sweep_fractions_left; // Nof. invocations left until we are completed with this pass 66 static volatile int _sweep_fractions_left; // Nof. invocations left until we are completed with this pass
68 static volatile int _sweep_started; // Flag to control conc sweeper 67 static volatile int _sweep_started; // Flag to control conc sweeper
69 static volatile bool _should_sweep; // Indicates if we should invoke the sweeper 68 static volatile bool _should_sweep; // Indicates if we should invoke the sweeper
70 static volatile int _bytes_changed; // Counts the total nmethod size if the nmethod changed from: 69 static volatile int _bytes_changed; // Counts the total nmethod size if the nmethod changed from:
71 // 1) alive -> not_entrant 70 // 1) alive -> not_entrant
72 // 2) not_entrant -> zombie 71 // 2) not_entrant -> zombie
73 // 3) zombie -> marked_for_reclamation 72 // 3) zombie -> marked_for_reclamation
74 // Stat counters 73 // Stat counters
75 static long _total_nof_methods_reclaimed; // Accumulated nof methods flushed 74 static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed
76 static long _total_nof_c2_methods_reclaimed; // Accumulated nof C2-compiled methods flushed 75 static Tickspan _total_time_sweeping; // Accumulated time sweeping
77 static size_t _total_flushed_size; // Total size of flushed methods 76 static Tickspan _total_time_this_sweep; // Total time this sweep
78 static int _hotness_counter_reset_val; 77 static Tickspan _peak_sweep_time; // Peak time for a full sweep
79 78 static Tickspan _peak_sweep_fraction_time; // Peak time sweeping one fraction
80 static Tickspan _total_time_sweeping; // Accumulated time sweeping
81 static Tickspan _total_time_this_sweep; // Total time this sweep
82 static Tickspan _peak_sweep_time; // Peak time for a full sweep
83 static Tickspan _peak_sweep_fraction_time; // Peak time sweeping one fraction
84 79
85 static int process_nmethod(nmethod *nm); 80 static int process_nmethod(nmethod *nm);
86 static void release_nmethod(nmethod* nm); 81 static void release_nmethod(nmethod* nm);
87 82
88 static bool sweep_in_progress(); 83 static bool sweep_in_progress();
89 static void sweep_code_cache(); 84 static void sweep_code_cache();
85
86 static int _hotness_counter_reset_val;
90 87
91 public: 88 public:
92 static long traversal_count() { return _traversals; } 89 static long traversal_count() { return _traversals; }
93 static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; } 90 static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; }
94 static const Tickspan total_time_sweeping() { return _total_time_sweeping; } 91 static const Tickspan total_time_sweeping() { return _total_time_sweeping; }
106 #endif 103 #endif
107 104
108 static void mark_active_nmethods(); // Invoked at the end of each safepoint 105 static void mark_active_nmethods(); // Invoked at the end of each safepoint
109 static void possibly_sweep(); // Compiler threads call this to sweep 106 static void possibly_sweep(); // Compiler threads call this to sweep
110 107
108 static int sort_nmethods_by_hotness(nmethod** nm1, nmethod** nm2);
111 static int hotness_counter_reset_val(); 109 static int hotness_counter_reset_val();
112 static void report_state_change(nmethod* nm); 110 static void report_state_change(nmethod* nm);
113 static void possibly_enable_sweeper(); 111 static void possibly_enable_sweeper();
114 static void print(); // Printing/debugging
115 }; 112 };
116 113
117 #endif // SHARE_VM_RUNTIME_SWEEPER_HPP 114 #endif // SHARE_VM_RUNTIME_SWEEPER_HPP