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view src/share/vm/compiler/abstractCompiler.hpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
---|---|
date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | 06f017f7daa7 d2a62e0f25eb |
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/* * Copyright (c) 1999, 2010, 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_COMPILER_ABSTRACTCOMPILER_HPP #define SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP #include "ci/compilerInterface.hpp" typedef void (*initializer)(void); class AbstractCompiler : public CHeapObj { private: bool _is_initialized; // Mark whether compiler object is initialized protected: // Used for tracking global state of compiler runtime initialization enum { uninitialized, initializing, initialized }; // This method will call the initialization method "f" once (per compiler class/subclass) // and do so without holding any locks void initialize_runtimes(initializer f, volatile int* state); public: AbstractCompiler() : _is_initialized(false) {} // Name of this compiler virtual const char* name() = 0; // Missing feature tests virtual bool supports_native() { return true; } virtual bool supports_osr () { return true; } #if defined(TIERED) || ( !defined(COMPILER1) && !defined(COMPILER2) && !defined(SHARK)) virtual bool is_c1 () { return false; } virtual bool is_c2 () { return false; } virtual bool is_shark() { return false; } #else #ifdef COMPILER1 bool is_c1 () { return true; } bool is_c2 () { return false; } bool is_shark() { return false; } #endif // COMPILER1 #ifdef COMPILER2 bool is_c1 () { return false; } bool is_c2 () { return true; } bool is_shark() { return false; } #endif // COMPILER2 #ifdef SHARK bool is_c1 () { return false; } bool is_c2 () { return false; } bool is_shark() { return true; } #endif // SHARK #endif // TIERED // Customization virtual bool needs_stubs () = 0; void mark_initialized() { _is_initialized = true; } bool is_initialized() { return _is_initialized; } virtual void initialize() = 0; // Compilation entry point for methods virtual void compile_method(ciEnv* env, ciMethod* target, int entry_bci) { ShouldNotReachHere(); } // Print compilation timers and statistics virtual void print_timers() { ShouldNotReachHere(); } }; #endif // SHARE_VM_COMPILER_ABSTRACTCOMPILER_HPP