Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1ErgoVerbose.cpp @ 12110:4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
author | stefank |
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date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | 41406797186b |
children |
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/* * 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 ErgoMixedGCs: return "Mixed GCs"; default: ShouldNotReachHere(); // Keep the Windows compiler happy return NULL; } }