GPU vs. CPU computations

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GPU vs. CPU computations

• Árni Einarsson
• Jacek Kolodziej

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3x3 image filters

• Edge detection
• Computations only

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3x3 image filters

• Edge detection
• Computations only

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3x3 image filters

• Edge detection Computations only

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3x3 image filters

• More computation than lookups

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3x3 image filters
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Edge detection

• CPU computation time depends on input data, can
  be up to 100x slower (!)
• Possible reasons
• CPU jump predictions (?)
• Cache management (?)
• Dependant on input data in multiplication (?)
• (put your ideas here)

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Water surface simulation

• Computations only performance

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Water surface simulation

• Computations visualization (with
  synchronization)

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Water surface simulation

• Computations visualization (without
  synchronization)

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Questions ?