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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 c18cbe5936b8
children 06320b1578cb
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# Copyright (c) 2006, 2007, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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# 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
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# 2 along with this work; if not, write to the Free Software Foundation,
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# 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.
#  
#

# A list of object files built without the platform specific PIC flags, e.g.
# -fPIC on linux. Performance measurements show that by compiling GC related 
# code, we could significantly reduce the GC pause time on 32 bit Linux/Unix
# platforms. See 6454213 for more details.
include $(GAMMADIR)/make/scm.make

ifneq ($(OSNAME), windows)
  ifndef LP64
    NONPIC_DIRS  = memory oops gc_implementation gc_interface 
    NONPIC_DIRS  := $(foreach dir,$(NONPIC_DIRS), $(GAMMADIR)/src/share/vm/$(dir))
    # Look for source files under NONPIC_DIRS
    NONPIC_FILES := $(foreach dir,$(NONPIC_DIRS),\
                      $(shell find $(dir) \( $(SCM_DIRS) \) -prune -o \
		      -name '*.cpp' -print))
    NONPIC_OBJ_FILES := $(notdir $(subst .cpp,.o,$(NONPIC_FILES)))
  endif
endif