Mercurial > hg > graal-compiler
view src/share/vm/runtime/simpleThresholdPolicy.inline.hpp @ 3405:8cbcd406c42e
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
author | ysr |
---|---|
date | Fri, 27 May 2011 15:05:33 -0700 |
parents | f95d63e2154a |
children | da91efe96a93 |
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/* * Copyright (c) 2001, 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_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP template<CompLevel level> bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) { switch(level) { case CompLevel_none: case CompLevel_limited_profile: return (i > Tier3InvocationThreshold * scale) || (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale); case CompLevel_full_profile: return (i > Tier4InvocationThreshold * scale) || (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale); } return true; } template<CompLevel level> bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) { switch(level) { case CompLevel_none: case CompLevel_limited_profile: return b > Tier3BackEdgeThreshold * scale; case CompLevel_full_profile: return b > Tier4BackEdgeThreshold * scale; } return true; } // Simple methods are as good being compiled with C1 as C2. // Determine if a given method is such a case. bool SimpleThresholdPolicy::is_trivial(methodOop method) { if (method->is_accessor()) return true; if (method->code() != NULL) { methodDataOop mdo = method->method_data(); if (mdo != NULL && mdo->num_loops() == 0 && (method->code_size() < 5 || (mdo->num_blocks() < 4) && (method->code_size() < 15))) { return !mdo->would_profile(); } } return false; } #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP