Diferență între revizuiri ale paginii „Performance analysis and optimization”

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(Nu s-au afișat 16 versiuni intermediare efectuate de același utilizator)
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Session 1, x86 optimization:
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= Results =
  
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C/C++: increase the execution speed for the code that reverses the order of the bits composing a 100 M esantioane of unsigned 32-bit (eg. 10111...11 -> 11..11101)
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https://docs.google.com/spreadsheets/d/1GvZ-P-MEA9iPuBFx2onQ8qg0o2cDQSoWFV2Y0T11Fls/edit?usp=sharing
  
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Expected/Presented techniques:
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= Support materials =
  
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first implementation ~ 10 seconds
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http://www.agner.org/optimize/optimizing_cpp.pdf
  
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compiler optimized ~ 5 seconds
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https://www.arm.com/files/pdf/AT_-_Better_C_Code_for_ARM_Devices.pdf
  
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loop unrolling
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= Lab sessions =
  
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bit-tricks
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Contact: calin.bira_AT_upb.ro
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optimizing variables into registers
 
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256-entry 8-bit table of 1 KB
 
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16-bit table of 64 k entries (256 KB)
 
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32-bit table of 4 G entries (16 GB)
 

Versiunea curentă din 9 martie 2026 08:38

Results

https://docs.google.com/spreadsheets/d/1GvZ-P-MEA9iPuBFx2onQ8qg0o2cDQSoWFV2Y0T11Fls/edit?usp=sharing

Support materials

http://www.agner.org/optimize/optimizing_cpp.pdf

https://www.arm.com/files/pdf/AT_-_Better_C_Code_for_ARM_Devices.pdf

Lab sessions

Contact: calin.bira_AT_upb.ro

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