Mercurial > hg > truffle
comparison src/share/vm/runtime/simpleThresholdPolicy.inline.hpp @ 1783:d5d065957597
6953144: Tiered compilation
Summary: Infrastructure for tiered compilation support (interpreter + c1 + c2) for 32 and 64 bit. Simple tiered policy implementation.
Reviewed-by: kvn, never, phh, twisti
author | iveresov |
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date | Fri, 03 Sep 2010 17:51:07 -0700 |
parents | |
children | f95d63e2154a |
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1782:f353275af40e | 1783:d5d065957597 |
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1 /* | |
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 | |
26 template<CompLevel level> | |
27 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) { | |
28 switch(level) { | |
29 case CompLevel_none: | |
30 case CompLevel_limited_profile: | |
31 return (i > Tier3InvocationThreshold * scale) || | |
32 (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale); | |
33 case CompLevel_full_profile: | |
34 return (i > Tier4InvocationThreshold * scale) || | |
35 (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale); | |
36 } | |
37 return true; | |
38 } | |
39 | |
40 template<CompLevel level> | |
41 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) { | |
42 switch(level) { | |
43 case CompLevel_none: | |
44 case CompLevel_limited_profile: | |
45 return b > Tier3BackEdgeThreshold * scale; | |
46 case CompLevel_full_profile: | |
47 return b > Tier4BackEdgeThreshold * scale; | |
48 } | |
49 return true; | |
50 } | |
51 | |
52 // Simple methods are as good being compiled with C1 as C2. | |
53 // Determine if a given method is such a case. | |
54 bool SimpleThresholdPolicy::is_trivial(methodOop method) { | |
55 if (method->is_accessor()) return true; | |
56 if (method->code() != NULL) { | |
57 methodDataOop mdo = method->method_data(); | |
58 if (mdo != NULL && mdo->num_loops() == 0 && | |
59 (method->code_size() < 5 || (mdo->num_blocks() < 4) && (method->code_size() < 15))) { | |
60 return !mdo->would_profile(); | |
61 } | |
62 } | |
63 return false; | |
64 } |