Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/simpleThresholdPolicy.inline.hpp@72053ed6f8d4 (annotated)
src/share/vm/runtime/simpleThresholdPolicy.inline.hpp
Thu, 24 Nov 2016 11:27:57 +0100
- author
- tschatzl
- date
- Thu, 24 Nov 2016 11:27:57 +0100
- changeset 9982
- 72053ed6f8d4
- parent 7365
- 600c44255e5f
- child 7535
- 7ae4e26cb1e0
- permissions
- -rw-r--r--
8057003: Large reference arrays cause extremely long synchronization times
Summary: Slice large object arrays into parts so that the synchronization of marking threads with an STW pause request does not take long.
Reviewed-by: ehelin, pliden
Contributed-by: maoliang.ml@alibaba-inc.com
| iveresov@2138 | 1 | /* |
| coleenp@4037 | 2 | * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| iveresov@2138 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| iveresov@2138 | 4 | * |
| iveresov@2138 | 5 | * This code is free software; you can redistribute it and/or modify it |
| iveresov@2138 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| iveresov@2138 | 7 | * published by the Free Software Foundation. |
| iveresov@2138 | 8 | * |
| iveresov@2138 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| iveresov@2138 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| iveresov@2138 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| iveresov@2138 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| iveresov@2138 | 13 | * accompanied this code). |
| iveresov@2138 | 14 | * |
| iveresov@2138 | 15 | * You should have received a copy of the GNU General Public License version |
| iveresov@2138 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| iveresov@2138 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| iveresov@2138 | 18 | * |
| iveresov@2138 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| iveresov@2138 | 20 | * or visit www.oracle.com if you need additional information or have any |
| iveresov@2138 | 21 | * questions. |
| iveresov@2138 | 22 | * |
| iveresov@2138 | 23 | */ |
| iveresov@2138 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP |
| iveresov@2138 | 27 | |
| iveresov@2138 | 28 | template<CompLevel level> |
| iveresov@2138 | 29 | bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) { |
| iveresov@2138 | 30 | switch(level) { |
| iveresov@2138 | 31 | case CompLevel_none: |
| iveresov@2138 | 32 | case CompLevel_limited_profile: |
| iveresov@2138 | 33 | return (i > Tier3InvocationThreshold * scale) || |
| iveresov@2138 | 34 | (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale); |
| iveresov@2138 | 35 | case CompLevel_full_profile: |
| iveresov@2138 | 36 | return (i > Tier4InvocationThreshold * scale) || |
| iveresov@2138 | 37 | (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale); |
| iveresov@2138 | 38 | } |
| iveresov@2138 | 39 | return true; |
| iveresov@2138 | 40 | } |
| iveresov@2138 | 41 | |
| iveresov@2138 | 42 | template<CompLevel level> |
| iveresov@2138 | 43 | bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) { |
| iveresov@2138 | 44 | switch(level) { |
| iveresov@2138 | 45 | case CompLevel_none: |
| iveresov@2138 | 46 | case CompLevel_limited_profile: |
| iveresov@2138 | 47 | return b > Tier3BackEdgeThreshold * scale; |
| iveresov@2138 | 48 | case CompLevel_full_profile: |
| iveresov@2138 | 49 | return b > Tier4BackEdgeThreshold * scale; |
| iveresov@2138 | 50 | } |
| iveresov@2138 | 51 | return true; |
| iveresov@2138 | 52 | } |
| iveresov@2138 | 53 | |
| iveresov@2138 | 54 | // Simple methods are as good being compiled with C1 as C2. |
| iveresov@2138 | 55 | // Determine if a given method is such a case. |
| coleenp@4037 | 56 | bool SimpleThresholdPolicy::is_trivial(Method* method) { |
| thartmann@7365 | 57 | if (method->is_accessor() || |
| thartmann@7365 | 58 | method->is_constant_getter()) { |
| thartmann@7365 | 59 | return true; |
| thartmann@7365 | 60 | } |
| thartmann@7365 | 61 | if (method->has_loops() || method->code_size() >= 15) { |
| thartmann@7365 | 62 | return false; |
| thartmann@7365 | 63 | } |
| thartmann@7365 | 64 | MethodData* mdo = method->method_data(); |
| thartmann@7365 | 65 | if (mdo != NULL && !mdo->would_profile() && |
| thartmann@7365 | 66 | (method->code_size() < 5 || (mdo->num_blocks() < 4))) { |
| thartmann@7365 | 67 | return true; |
| iveresov@2138 | 68 | } |
| iveresov@2138 | 69 | return false; |
| iveresov@2138 | 70 | } |
| stefank@2314 | 71 | |
| stefank@2314 | 72 | #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP |
