Mercurial > hg > truffle
diff src/share/vm/gc_implementation/g1/g1ErgoVerbose.cpp @ 3914:20213c8a3c40
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 |
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date | Wed, 07 Sep 2011 12:21:23 -0400 |
parents | |
children | 41406797186b |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/gc_implementation/g1/g1ErgoVerbose.cpp Wed Sep 07 12:21:23 2011 -0400 @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#include "precompiled.hpp" +#include "gc_implementation/g1/g1ErgoVerbose.hpp" +#include "utilities/ostream.hpp" + +ErgoLevel G1ErgoVerbose::_level; +bool G1ErgoVerbose::_enabled[ErgoHeuristicNum]; + +void G1ErgoVerbose::initialize() { + set_level(ErgoLow); + set_enabled(false); +} + +void G1ErgoVerbose::set_level(ErgoLevel level) { + _level = level; +} + +void G1ErgoVerbose::set_enabled(ErgoHeuristic n, bool enabled) { + assert(0 <= n && n < ErgoHeuristicNum, "pre-condition"); + _enabled[n] = enabled; +} + +void G1ErgoVerbose::set_enabled(bool enabled) { + for (int n = 0; n < ErgoHeuristicNum; n += 1) { + set_enabled((ErgoHeuristic) n, enabled); + } +} + +const char* G1ErgoVerbose::to_string(int tag) { + ErgoHeuristic n = extract_heuristic(tag); + switch (n) { + case ErgoHeapSizing: return "Heap Sizing"; + case ErgoCSetConstruction: return "CSet Construction"; + case ErgoConcCycles: return "Concurrent Cycles"; + case ErgoPartiallyYoungGCs: return "Partially-Young GCs"; + default: + ShouldNotReachHere(); + // Keep the Windows compiler happy + return NULL; + } +} +