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annotate src/share/vm/compiler/compileLog.hpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
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date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | 3582bf76420e |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
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 | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_COMPILER_COMPILELOG_HPP |
26 #define SHARE_VM_COMPILER_COMPILELOG_HPP | |
27 | |
28 #include "utilities/xmlstream.hpp" | |
29 | |
0 | 30 class ciObject; |
31 class ciSymbol; | |
32 | |
33 // CompileLog | |
34 // | |
35 // An open stream for logging information about activities in a | |
36 // compiler thread. There is exactly one per CompilerThread, | |
37 // if the +LogCompilation switch is enabled. | |
38 class CompileLog : public xmlStream { | |
39 private: | |
40 const char* _file; // name of file where XML goes | |
41 julong _file_end; // last good end of file | |
42 intx _thread_id; // which compile thread | |
43 | |
44 stringStream _context; // optional, killable context marker | |
45 char _context_buffer[100]; | |
46 | |
47 char* _identities; // array of boolean | |
48 int _identities_limit; | |
49 int _identities_capacity; | |
50 | |
51 CompileLog* _next; // static chain of all logs | |
52 | |
53 static CompileLog* _first; // head of static chain | |
54 | |
55 void va_tag(bool push, const char* format, va_list ap); | |
56 | |
57 public: | |
58 CompileLog(const char* file, FILE* fp, intx thread_id); | |
59 ~CompileLog(); | |
60 | |
61 intx thread_id() { return _thread_id; } | |
62 const char* file() { return _file; } | |
63 stringStream* context() { return &_context; } | |
64 | |
65 void name(ciSymbol* s); // name='s' | |
66 void name(symbolHandle s) { xmlStream::name(s); } | |
67 | |
68 // Output an object description, return obj->ident(). | |
69 int identify(ciObject* obj); | |
70 void clear_identities(); | |
71 | |
72 // virtuals | |
73 virtual void see_tag(const char* tag, bool push); | |
74 virtual void pop_tag(const char* tag); | |
75 | |
76 // make a provisional end of log mark | |
77 void mark_file_end() { _file_end = out()->count(); } | |
78 | |
79 // copy all logs to the given stream | |
80 static void finish_log(outputStream* out); | |
81 static void finish_log_on_error(outputStream* out, char *buf, int buflen); | |
82 }; | |
1972 | 83 |
84 #endif // SHARE_VM_COMPILER_COMPILELOG_HPP |