Mercurial > hg > graal-compiler
annotate src/share/vm/interpreter/bytecodeHistogram.hpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // BytecodeCounter counts the number of bytecodes executed | |
26 | |
27 class BytecodeCounter: AllStatic { | |
28 private: | |
29 NOT_PRODUCT(static int _counter_value;) | |
30 NOT_PRODUCT(static jlong _reset_time;) | |
31 | |
32 friend class TemplateInterpreterGenerator; | |
33 friend class BytecodeInterpreter; | |
34 | |
35 public: | |
36 // Initialization | |
37 static void reset() PRODUCT_RETURN; | |
38 | |
39 // Counter info (all info since last reset) | |
40 static int counter_value() PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; }); | |
41 static double elapsed_time() PRODUCT_RETURN0; // in seconds | |
42 static double frequency() PRODUCT_RETURN0; // bytecodes/seconds | |
43 | |
44 // Counter printing | |
45 static void print() PRODUCT_RETURN; | |
46 }; | |
47 | |
48 | |
49 // BytecodeHistogram collects number of executions of bytecodes | |
50 | |
51 class BytecodeHistogram: AllStatic { | |
52 private: | |
53 NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];) // a counter for each bytecode | |
54 | |
55 friend class TemplateInterpreterGenerator; | |
56 friend class InterpreterGenerator; | |
57 friend class BytecodeInterpreter; | |
58 | |
59 public: | |
60 // Initialization | |
61 static void reset() PRODUCT_RETURN; // reset counters | |
62 | |
63 // Profile printing | |
64 static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent | |
65 }; | |
66 | |
67 | |
68 // BytecodePairHistogram collects number of executions of bytecode pairs. | |
69 // A bytecode pair is any sequence of two consequtive bytecodes. | |
70 | |
71 class BytecodePairHistogram: AllStatic { | |
72 public: // for SparcWorks | |
73 enum Constants { | |
74 log2_number_of_codes = 8, // use a power of 2 for faster addressing | |
75 number_of_codes = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes | |
76 number_of_pairs = number_of_codes * number_of_codes | |
77 }; | |
78 | |
79 private: | |
80 NOT_PRODUCT(static int _index;) // new bytecode is shifted in - used to index into _counters | |
81 NOT_PRODUCT(static int _counters[number_of_pairs];) // a counter for each pair | |
82 | |
83 friend class TemplateInterpreterGenerator; | |
84 friend class InterpreterGenerator; | |
85 | |
86 public: | |
87 // Initialization | |
88 static void reset() PRODUCT_RETURN; // reset counters | |
89 | |
90 // Profile printing | |
91 static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent | |
92 }; |