Mercurial > hg > graal-jvmci-8
view src/share/vm/ci/ciTypeArrayKlass.hpp @ 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 |
---|---|
date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | d8ce2825b193 |
children | d13d7aba8c12 |
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/* * Copyright (c) 1999, 2012, 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. * */ #ifndef SHARE_VM_CI_CITYPEARRAYKLASS_HPP #define SHARE_VM_CI_CITYPEARRAYKLASS_HPP #include "ci/ciArrayKlass.hpp" // ciTypeArrayKlass // // This class represents a Klass* in the HotSpot virtual machine // whose Klass part in a TypeArrayKlass. class ciTypeArrayKlass : public ciArrayKlass { CI_PACKAGE_ACCESS protected: ciTypeArrayKlass(KlassHandle h_k); TypeArrayKlass* get_TypeArrayKlass() { return (TypeArrayKlass*)get_Klass(); } const char* type_string() { return "ciTypeArrayKlass"; } // Helper method for make. static ciTypeArrayKlass* make_impl(BasicType type); public: // The type of the array elements. BasicType element_type() { return Klass::layout_helper_element_type(layout_helper()); } // What kind of ciObject is this? bool is_type_array_klass() const { return true; } // Make an array klass corresponding to the specified primitive type. static ciTypeArrayKlass* make(BasicType type); }; #endif // SHARE_VM_CI_CITYPEARRAYKLASS_HPP