Mercurial > hg > graal-jvmci-8
view src/share/vm/trace/traceEvent.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 | f2110083203d |
children | 86e6d691f2e1 |
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/* * Copyright (c) 2012, 2013, 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_TRACE_TRACEEVENT_HPP #define SHARE_VM_TRACE_TRACEEVENT_HPP enum EventStartTime { UNTIMED, TIMED }; #include "utilities/macros.hpp" #if INCLUDE_TRACE #include "trace/traceBackend.hpp" #include "trace/tracing.hpp" #include "tracefiles/traceEventIds.hpp" #include "tracefiles/traceTypes.hpp" template<typename T> class TraceEvent : public StackObj { protected: jlong _startTime; jlong _endTime; private: bool _started; #ifdef ASSERT bool _committed; bool _cancelled; protected: bool _ignore_check; #endif public: TraceEvent(EventStartTime timing=TIMED) : _startTime(0), _endTime(0), _started(false) #ifdef ASSERT , _committed(false), _cancelled(false), _ignore_check(false) #endif { if (T::is_enabled()) { _started = true; if (timing == TIMED && !T::isInstant) { static_cast<T *>(this)->set_starttime(Tracing::time()); } } } static bool is_enabled() { return Tracing::is_event_enabled(T::eventId); } bool should_commit() { return _started; } void ignoreCheck() { DEBUG_ONLY(_ignore_check = true); } void commit() { if (!should_commit()) { cancel(); return; } if (_endTime == 0) { static_cast<T*>(this)->set_endtime(Tracing::time()); } if (static_cast<T*>(this)->should_write()) { static_cast<T*>(this)->writeEvent(); } set_commited(); } void set_starttime(jlong time) { _startTime = time; } void set_endtime(jlong time) { _endTime = time; } TraceEventId id() const { return T::eventId; } bool is_instant() const { return T::isInstant; } bool is_requestable() const { return T::isRequestable; } bool has_thread() const { return T::hasThread; } bool has_stacktrace() const { return T::hasStackTrace; } void cancel() { assert(!_committed && !_cancelled, "event was already committed/cancelled"); DEBUG_ONLY(_cancelled = true); } void set_commited() { assert(!_committed, "event has already been committed"); DEBUG_ONLY(_committed = true); } ~TraceEvent() { if (_started) { assert(_ignore_check || _committed || _cancelled, "event was not committed/cancelled"); } } }; #endif /* INCLUDE_TRACE */ #endif /* SHARE_VM_TRACE_TRACEEVENT_HPP */