OPTIMIZING THE JAVA VIRTUAL MACHINE INSTRUCTION SET BY ...

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272 Refereed Conference Papers: B. Stephenson and W. Holst. A Quantitative Analysis of the Performance Impact of Specialized Bytecodes in Java. In Proceedings of the 2004 Conference of the Centre for Advanced Studies on Collaborative Research, pages 267-281. IBM Press, 2004. B. Stephenson and W. Holst. A Quantitative Analysis of Java Bytecode Sequences. In Proceedings of the Third International Conference on the Principles and Practice of Programming in Java, pages 15-20. Trinity College Dublin, 2004. Poster Presentations with Refereed Abstracts: B. Stephenson and W. Holst. A Technique for Utilizing Optimization Potential during Multicode Identification. In Companion of the 20th Annual ACM SIGPLAN Conference on Object-Oriented Programming, Systems, Languages and Applications, pages 154-155. ACM Press, 2005. B. Stephenson and W. Holst. Advancements in Multicode Optimization. In Companion of the 19th Annual ACM SIGPLAN Conference on Object-Oriented Programming, Systems, Languages and Applications, pages 186-187. ACM Press, 2004. B. Stephenson and W. Holst. Multicodes: Optimizing Virtual Machines Using Bytecode Sequences. In Companion of the 18th Annual ACM SIGPLAN Conference on Object-Oriented Programming, Systems, Languages and Applications, pages 328-329. ACM Press, 2003. Technical Reports: B. Stephenson and W. Holst. Transparent Use of C++ Classes in Java Environments. University of Western Ontario, Technical Report #294: 1-18, 2002.
273 Departmental and University Presentations: B. Stephenson. The Most Contributory Substring Problem: Definition and Solution. Abstract in Western Research Forum Program and Schedule, London, Ontario, Canada, 2006. B. Stephenson. An Efficient Algorithm for Identifying the Most Contributory Substring. Abstract in Proceedings of the University of Western Ontario Research in Computer Science Conference, London, Ontario, Canada, March 23, 2006. B. Stephenson. An Exploration of Specialized Java Bytecodes. Abstract in Western Research Forum Program & Abstracts, London, Ontario, Canada, 2005. B. Stephenson. An Analysis of Specialized Java Bytecodes. Abstract in Proceedings of the University of Western Ontario Research in Computer Science Conference, London, Ontario, Canada, March 17, 2005. B. Stephenson. An Introduction to Multicodes. Abstract in Proceedings of the University of Western Ontario Research in Computer Science Conference, London, Ontario, Canada, March 2, 2004. B. Stephenson. Typesetting Posters with LaTeX: A Practical Guide. Abstract in Proceedings of the University of Western Ontario Research in Computer Science Conference, London, Ontario, Canada, March 2, 2004. B. Stephenson and W. Holst. Characterization and Optimization of Java Applications. Abstract in Western Research Forum Program & Abstracts, page 20, 2003.
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OPTIMIZING THE JAVA VIRTUAL MACHINE
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Abstract Since its public introduct
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Acknowledgments While my name is th
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2.4.4 Direct Threading . . . . . .
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7.2 An Overview of Multicodes . . .
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List of Figures 2.1 Core Virtual Ma
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7.11 201 compress Performance by Mu
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B.1 The Steps Followed to Evaluate
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6.1 Most Frequently Occurring Const
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1 Chapter 1 Introduction When Moore
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3 Studies were conducted that consi
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5 Chapter 2 An Overview of Java Thi
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7 Addressing this need led to the d
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9 performs garbage collection, a cl
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11 also has the ability to contain
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13 ... i − 1 iload 0x04 dstore 0x
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15 ... aload 3 iconst 2 faload ...
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17 Condition Equal Unequal Greater
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19 transfered to the start of a new
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21 piled into machine language inst
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23 Figure 2.6: Interpreter Engine C
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25 Figure 2.8: Interpreter Engine C
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27 The following section examines t
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29 execute (JMethod * method, Slot
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31 codelets shown in this example a
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33 3.1 Instruction Set Design The a
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35 is replaced with a new opcode if
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37 method. However, the Java Virtua
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39 3.2.5 Bytecode Optimization Tool
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41 each bytecode executed as was ac
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43 executing the application. The a
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45 Chapter 4 Despecialization The J
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47 ... i − 1 iload 3 iload 0x04 i
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49 purpose bytecodes. The notation,
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51 is present in the constant pool
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53 ... iload 3 iflt ... i − 1 i i
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55 the stack challenging in some ca
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Figure 4.7: Despecialization of Bra
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59 Specialized Bytecode load store
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61 tual machine (RVM). Version 2.3.
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63 Test Total Weighted Condition Pe
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69 4.2.6 Performance Summary Compar
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71 Category Original Desp. Percent
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73 the maximum value encountered af
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75 • Efficient support of new lan
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77 difference in the performance of
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79 JGF RayTracer: A 150 by 150 pixe
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81 # Average % of Specialized Despe
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83 provided by only two vendors. IB
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Figure 5.1: Average Performance Res
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87 Figure 5.4: Performance Results
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89 Figure 5.8: Performance Results
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91 ences in background processes, m
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93 difference in performance due to
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95 when a pure interpreter virtual
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97 It is observed that many of the
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99 Within this category, it was als
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101 machine code for the idioms. As
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103 were performed was less than 0.
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105 these despecializations in a me
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107 Chapter 6 Operand Profiling Cha
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109 the applications. In addition,
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111 The aload 0 bytecode was the mo
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113 function being integrated. Beca
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115 Implementing alignment rules un
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117 these data types in the list of
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Figure 6.3: Distribution of Local V
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121 are never executed by any of th
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123 load and store bytecodes. It is
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125 the time because the index bein
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127 6.2.5 Fields Only four bytecode
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129 Figure 6.8: Data types Accessed
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131 lar, the new set of specialized
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133 multicode block is defined to b
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135 Figure 7.1: Two Bytecodes and t
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137 because of the presence of the
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139 cache performance. As a result,
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141 Block 1: Block 2: aload 0 → g
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143 Sequence Count Score getfield a
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Figure 7.3: Iterative Multicode Ide
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147 number of bytecodes that will b
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149 BlockList: A list of the byteco
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151 Both the Total Bytecodes Score
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153 ... i − 1 ❄ ifeq 0x00 0x15
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155 Figure 7.7: Number of Unique Ca
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Figure 7.9: Cumulative Multicode Bl
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159 However, while considering long
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161 Figure 7.10: 201 compress Perfo
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163 Figure 7.14: Length 209 db Perf
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165 Figure 7.18: 222 mpegaudio Perf
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167 7.6.2 Overall Performance Acros
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169 a larger portion of the instruc
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171 // iload_1: stack[sp+1] = local
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173 // iload_1: // iconst_1: // iad
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175 Such bytecodes have a variable
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177 ∆ x1 /x 2 /x 3 /.../x n→ an
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179 Popping any values left on the
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181 7.9 Conclusion This chapter has
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183 ated will differ from that occu
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185 Figure 8.1: A Comparison of the
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187 performed impacts the sequences
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189 Figure 8.2: 201 compress Perfor
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191 Figure 8.5: 213 javac Performan
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193 Compared to the complete despec
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195 Figure 8.10: 209 db Performance
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197 performing multicode substituti
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199 Chapter 9 An Efficient Multicod
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201 alphabet employed by each of th
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9.4 An Algorithm for the Most Contr
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Figure 9.3: The Impact of Algorithm
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207 Algorithm NonOverlappingScore(n
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209 Algorithm CountUniqueOccurrence
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211 this algorithm did not consider
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213 exceptions if the value being c
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215 Figure 10.1: Multicode Blocks u
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217 approximately 30 percent of the
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219 a strategy other than direct th
Page 239 and 240: 221 10.2.6 Combining Multicodes and
Page 241 and 242: 223 10.2.9 Expanding the Class File
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Page 245 and 246: 227 based on these profile results
Page 247 and 248: 229 stitution were performed. It co
Page 249 and 250: 231 [13] B. Alpern, C. R. Attanasio
Page 251 and 252: 233 [33] K. Casey, D. Gregg, M. A.
Page 253 and 254: 235 [55] D. Gregg and J. Waldron. P
Page 255 and 256: 237 [78] E. M. McCreight. A space-e
Page 257 and 258: 239 [100] L. A. Smith, J. M. Bull,
Page 259 and 260: 241 [120] T. A. Welch. A technique
Page 261 and 262: 243 # Len Score Multicode % 1 30 10
Page 271 and 272: 253 Table A.5 continued: # Len Scor
Page 277 and 278: 259 the level of entropy within the
Page 279 and 280: 261 there are no pointers to these
Page 281 and 282: 263 information for each method so
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Page 285 and 286: Figure B.1: The Steps Followed to E
Page 287 and 288: 269 B.7 Summary This Chapter has de
Page 289: 271 Selected Honors and Awards Cont
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