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comparison src/share/vm/gc_implementation/g1/g1ErgoVerbose.cpp @ 3914:20213c8a3c40

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7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions Summary: It introduces ergonomic decision logging in G1 for the following heuristics: heap sizing, collection set construction, concurrent cycle initiation, and partially-young GC start/end. The code has a bit of refactoring in a few places to make the decision logging possible. It also replaces alternative ad-hoc logging that we have under different parameters and switches (G1_DEBUG, G1PolicyVerbose). Reviewed-by: johnc, ysr
author tonyp
date Wed, 07 Sep 2011 12:21:23 -0400
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children 41406797186b
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3913:27702f012017 3914:20213c8a3c40
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
27 #include "utilities/ostream.hpp"
28
29 ErgoLevel G1ErgoVerbose::_level;
30 bool G1ErgoVerbose::_enabled[ErgoHeuristicNum];
31
32 void G1ErgoVerbose::initialize() {
33 set_level(ErgoLow);
34 set_enabled(false);
35 }
36
37 void G1ErgoVerbose::set_level(ErgoLevel level) {
38 _level = level;
39 }
40
41 void G1ErgoVerbose::set_enabled(ErgoHeuristic n, bool enabled) {
42 assert(0 <= n && n < ErgoHeuristicNum, "pre-condition");
43 _enabled[n] = enabled;
44 }
45
46 void G1ErgoVerbose::set_enabled(bool enabled) {
47 for (int n = 0; n < ErgoHeuristicNum; n += 1) {
48 set_enabled((ErgoHeuristic) n, enabled);
49 }
50 }
51
52 const char* G1ErgoVerbose::to_string(int tag) {
53 ErgoHeuristic n = extract_heuristic(tag);
54 switch (n) {
55 case ErgoHeapSizing: return "Heap Sizing";
56 case ErgoCSetConstruction: return "CSet Construction";
57 case ErgoConcCycles: return "Concurrent Cycles";
58 case ErgoPartiallyYoungGCs: return "Partially-Young GCs";
59 default:
60 ShouldNotReachHere();
61 // Keep the Windows compiler happy
62 return NULL;
63 }
64 }
65