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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
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/*
 * Copyright (c) 2005, 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_C1_C1_CFGPRINTER_HPP
#define SHARE_VM_C1_C1_CFGPRINTER_HPP

#include "c1/c1_Compilation.hpp"
#include "c1/c1_Instruction.hpp"

#ifndef PRODUCT

// This is a utility class used for recording the results of a
// compilation for later analysis.

class CFGPrinterOutput;
class IntervalList;

class CFGPrinter : public AllStatic {
private:
  static CFGPrinterOutput* _output;
public:
  static CFGPrinterOutput* output() { assert(_output != NULL, ""); return _output; }


  static void print_compilation(Compilation* compilation);
  static void print_cfg(BlockList* blocks, const char* name, bool do_print_HIR, bool do_print_LIR);
  static void print_cfg(IR* blocks, const char* name, bool do_print_HIR, bool do_print_LIR);
  static void print_intervals(IntervalList* intervals, const char* name);
};

#endif

#endif // SHARE_VM_C1_C1_CFGPRINTER_HPP