Mercurial > hg > truffle
comparison src/share/vm/runtime/sweeper.hpp @ 10418:ff3c23a329ed
Merge
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Wed, 19 Jun 2013 20:24:27 +0200 |
parents | f2110083203d |
children | 5888334c9c24 |
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10417:acc1c61ba408 | 10418:ff3c23a329ed |
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1 /* | 1 /* |
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | 4 * |
5 * This code is free software; you can redistribute it and/or modify it | 5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as | 6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
29 // - cleanup inline caches | 29 // - cleanup inline caches |
30 // - reclamation of unreferences zombie nmethods | 30 // - reclamation of unreferences zombie nmethods |
31 // | 31 // |
32 | 32 |
33 class NMethodSweeper : public AllStatic { | 33 class NMethodSweeper : public AllStatic { |
34 static long _traversals; // Stack traversal count | 34 static long _traversals; // Stack scan count, also sweep ID. |
35 static nmethod* _current; // Current nmethod | 35 static nmethod* _current; // Current nmethod |
36 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache | 36 static int _seen; // Nof. nmethod we have currently processed in current pass of CodeCache |
37 static int _flushed_count; // Nof. nmethods flushed in current sweep | |
38 static int _zombified_count; // Nof. nmethods made zombie in current sweep | |
39 static int _marked_count; // Nof. nmethods marked for reclaim in current sweep | |
37 | 40 |
38 static volatile int _invocations; // No. of invocations left until we are completed with this pass | 41 static volatile int _invocations; // No. of invocations left until we are completed with this pass |
39 static volatile int _sweep_started; // Flag to control conc sweeper | 42 static volatile int _sweep_started; // Flag to control conc sweeper |
40 | 43 |
41 static bool _rescan; // Indicates that we should do a full rescan of the | 44 //The following are reset in scan_stacks and synchronized by the safepoint |
42 // of the code cache looking for work to do. | 45 static bool _resweep; // Indicates that a change has happend and we want another sweep, |
43 static bool _do_sweep; // Flag to skip the conc sweep if no stack scan happened | 46 // always checked and reset at a safepoint so memory will be in sync. |
44 static int _locked_seen; // Number of locked nmethods encountered during the scan | 47 static int _locked_seen; // Number of locked nmethods encountered during the scan |
45 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack | 48 static int _not_entrant_seen_on_stack; // Number of not entrant nmethod were are still on stack |
49 static jint _flush_token; // token that guards method flushing, making sure it is executed only once. | |
46 | 50 |
47 static bool _was_full; // remember if we did emergency unloading | 51 // These are set during a flush, a VM-operation |
48 static jint _advise_to_sweep; // flag to indicate code cache getting full | 52 static long _last_flush_traversal_id; // trav number at last flush unloading |
49 static jlong _last_was_full; // timestamp of last emergency unloading | 53 static jlong _last_full_flush_time; // timestamp of last emergency unloading |
50 static uint _highest_marked; // highest compile id dumped at last emergency unloading | 54 |
51 static long _was_full_traversal; // trav number at last emergency unloading | 55 // These are synchronized by the _sweep_started token |
56 static int _highest_marked; // highest compile id dumped at last emergency unloading | |
57 static int _dead_compile_ids; // number of compile ids that where not in the cache last flush | |
58 | |
59 // Stat counters | |
60 static int _number_of_flushes; // Total of full traversals caused by full cache | |
61 static int _total_nof_methods_reclaimed; // Accumulated nof methods flushed | |
62 static jlong _total_time_sweeping; // Accumulated time sweeping | |
63 static jlong _total_time_this_sweep; // Total time this sweep | |
64 static jlong _peak_sweep_time; // Peak time for a full sweep | |
65 static jlong _peak_sweep_fraction_time; // Peak time sweeping one fraction | |
66 static jlong _total_disconnect_time; // Total time cleaning code mem | |
67 static jlong _peak_disconnect_time; // Peak time cleaning code mem | |
52 | 68 |
53 static void process_nmethod(nmethod *nm); | 69 static void process_nmethod(nmethod *nm); |
54 | |
55 static void release_nmethod(nmethod* nm); | 70 static void release_nmethod(nmethod* nm); |
56 | 71 |
57 static void log_sweep(const char* msg, const char* format = NULL, ...); | 72 static void log_sweep(const char* msg, const char* format = NULL, ...); |
73 static bool sweep_in_progress(); | |
58 | 74 |
59 public: | 75 public: |
60 static long traversal_count() { return _traversals; } | 76 static long traversal_count() { return _traversals; } |
77 static int number_of_flushes() { return _number_of_flushes; } | |
78 static int total_nof_methods_reclaimed() { return _total_nof_methods_reclaimed; } | |
79 static jlong total_time_sweeping() { return _total_time_sweeping; } | |
80 static jlong peak_sweep_time() { return _peak_sweep_time; } | |
81 static jlong peak_sweep_fraction_time() { return _peak_sweep_fraction_time; } | |
82 static jlong total_disconnect_time() { return _total_disconnect_time; } | |
83 static jlong peak_disconnect_time() { return _peak_disconnect_time; } | |
61 | 84 |
62 #ifdef ASSERT | 85 #ifdef ASSERT |
63 // Keep track of sweeper activity in the ring buffer | 86 // Keep track of sweeper activity in the ring buffer |
64 static void record_sweep(nmethod* nm, int line); | 87 static void record_sweep(nmethod* nm, int line); |
65 static void report_events(int id, address entry); | 88 static void report_events(int id, address entry); |
69 static void scan_stacks(); // Invoked at the end of each safepoint | 92 static void scan_stacks(); // Invoked at the end of each safepoint |
70 static void sweep_code_cache(); // Concurrent part of sweep job | 93 static void sweep_code_cache(); // Concurrent part of sweep job |
71 static void possibly_sweep(); // Compiler threads call this to sweep | 94 static void possibly_sweep(); // Compiler threads call this to sweep |
72 | 95 |
73 static void notify(nmethod* nm) { | 96 static void notify(nmethod* nm) { |
74 // Perform a full scan of the code cache from the beginning. No | 97 // Request a new sweep of the code cache from the beginning. No |
75 // need to synchronize the setting of this flag since it only | 98 // need to synchronize the setting of this flag since it only |
76 // changes to false at safepoint so we can never overwrite it with false. | 99 // changes to false at safepoint so we can never overwrite it with false. |
77 _rescan = true; | 100 _resweep = true; |
78 } | 101 } |
79 | 102 |
80 static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate | 103 static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate |
81 static void speculative_disconnect_nmethods(bool was_full); // Called by vm op to deal with alloc failure | 104 static void speculative_disconnect_nmethods(bool was_full); // Called by vm op to deal with alloc failure |
82 | |
83 static void set_was_full(bool state) { _was_full = state; } | |
84 static bool was_full() { return _was_full; } | |
85 }; | 105 }; |
86 | 106 |
87 #endif // SHARE_VM_RUNTIME_SWEEPER_HPP | 107 #endif // SHARE_VM_RUNTIME_SWEEPER_HPP |