39 static int _marked_count; // Nof. nmethods marked for reclaim in current sweep
40
41 static volatile int _invocations; // No. of invocations left until we are completed with this pass
42 static volatile int _sweep_started; // Flag to control conc sweeper
43
44 static bool _rescan; // Indicates that we should do a full rescan of the
45 // of the code cache looking for work to do.
46 static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened
47 static int _locked_seen; // Number of locked nmethods encountered during the scan
48 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
49
50 static bool _was_full; // remember if we did emergency unloading
51 static jint _advise_to_sweep; // flag to indicate code cache getting full
52 static jlong _last_was_full; // timestamp of last emergency unloading
53 static uint _highest_marked; // highest compile id dumped at last emergency unloading
54 static long _was_full_traversal; // trav number at last emergency unloading
55
56 // Stat counters
57 static int _number_of_flushes; // Total of full traversals caused by full cache
58 static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed
59 static long _total_time_sweeping; // Accumulated time sweeping
60 static long _total_time_this_sweep; // Total time this sweep
61 static long _peak_sweep_time; // Peak time for a full sweep
62 static long _peak_sweep_fraction_time; // Peak time sweeping one fraction
63 static long _total_disconnect_time; // Total time cleaning code mem
64 static long _peak_disconnect_time; // Peak time cleaning code mem
65
66 static void process_nmethod(nmethod *nm);
67
68 static void log_sweep(const char* msg, const char* format = NULL, ...);
69
70 public:
71 static long traversal_count() { return _traversals; }
72 static int number_of_flushes() { return _number_of_flushes; }
73 static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; }
74 static long total_time_sweeping() { return _total_time_sweeping; }
75 static long peak_sweep_time() { return _peak_sweep_time; }
76 static long peak_sweep_fraction_time() { return _peak_sweep_fraction_time; }
77 static long total_disconnect_time() { return _total_disconnect_time; }
78 static long peak_disconnect_time() { return _peak_disconnect_time; }
79
80 #ifdef ASSERT
81 // Keep track of sweeper activity in the ring buffer
82 static void record_sweep(nmethod* nm, int line);
83 static void report_events(int id, address entry);
84 static void report_events();
85 #endif
86
87 static void scan_stacks(); // Invoked at the end of each safepoint
88 static void sweep_code_cache(); // Concurrent part of sweep job
89 static void possibly_sweep(); // Compiler threads call this to sweep
90
91 static void notify(nmethod* nm) {
92 // Perform a full scan of the code cache from the beginning. No
93 // need to synchronize the setting of this flag since it only
94 // changes to false at safepoint so we can never overwrite it with false.
95 _rescan = true;
96 }
97
98 static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate
|
39 static int _marked_count; // Nof. nmethods marked for reclaim in current sweep
40
41 static volatile int _invocations; // No. of invocations left until we are completed with this pass
42 static volatile int _sweep_started; // Flag to control conc sweeper
43
44 static bool _rescan; // Indicates that we should do a full rescan of the
45 // of the code cache looking for work to do.
46 static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened
47 static int _locked_seen; // Number of locked nmethods encountered during the scan
48 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack
49
50 static bool _was_full; // remember if we did emergency unloading
51 static jint _advise_to_sweep; // flag to indicate code cache getting full
52 static jlong _last_was_full; // timestamp of last emergency unloading
53 static uint _highest_marked; // highest compile id dumped at last emergency unloading
54 static long _was_full_traversal; // trav number at last emergency unloading
55
56 // Stat counters
57 static int _number_of_flushes; // Total of full traversals caused by full cache
58 static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed
59 static jlong _total_time_sweeping; // Accumulated time sweeping
60 static jlong _total_time_this_sweep; // Total time this sweep
61 static jlong _peak_sweep_time; // Peak time for a full sweep
62 static jlong _peak_sweep_fraction_time; // Peak time sweeping one fraction
63 static jlong _total_disconnect_time; // Total time cleaning code mem
64 static jlong _peak_disconnect_time; // Peak time cleaning code mem
65
66 static void process_nmethod(nmethod *nm);
67
68 static void log_sweep(const char* msg, const char* format = NULL, ...);
69
70 public:
71 static long traversal_count() { return _traversals; }
72 static int number_of_flushes() { return _number_of_flushes; }
73 static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; }
74 static jlong total_time_sweeping() { return _total_time_sweeping; }
75 static jlong peak_sweep_time() { return _peak_sweep_time; }
76 static jlong peak_sweep_fraction_time() { return _peak_sweep_fraction_time; }
77 static jlong total_disconnect_time() { return _total_disconnect_time; }
78 static jlong peak_disconnect_time() { return _peak_disconnect_time; }
79
80 #ifdef ASSERT
81 // Keep track of sweeper activity in the ring buffer
82 static void record_sweep(nmethod* nm, int line);
83 static void report_events(int id, address entry);
84 static void report_events();
85 #endif
86
87 static void scan_stacks(); // Invoked at the end of each safepoint
88 static void sweep_code_cache(); // Concurrent part of sweep job
89 static void possibly_sweep(); // Compiler threads call this to sweep
90
91 static void notify(nmethod* nm) {
92 // Perform a full scan of the code cache from the beginning. No
93 // need to synchronize the setting of this flag since it only
94 // changes to false at safepoint so we can never overwrite it with false.
95 _rescan = true;
96 }
97
98 static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate
|