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Aphirak Jansang 43650357 Thiranun Dumrongson 43650118

Aphirak Jansang 43650357 Thiranun Dumrongson 43650118. Agenda. Overview Design Goals Crusoe Family Crusoe Architecture Crusoe Technology Code Morphing LongRun Technology Conclusion Reference. Overview. In January of 2000, Transmeta Corporation introduced the Crusoe™ processors,

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Aphirak Jansang 43650357 Thiranun Dumrongson 43650118

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  1. Aphirak Jansang 43650357 Thiranun Dumrongson 43650118

  2. Agenda • Overview • Design Goals • Crusoe Family • Crusoe Architecture • Crusoe Technology • Code Morphing • LongRun Technology • Conclusion • Reference

  3. Overview • In January of 2000, Transmeta Corporation introduced the Crusoe™ processors, • An x86-compatible family of solutions that combines strong performance with remarkably low power consumption. • Crusoe is pitched as a "hybrid software - hardware" CPU.

  4. Design Goals Designed for the new world of Ultra-light mobile PCs and Internet devices • Remarkably low power consumption • High performance • Full x86 compatibility

  5. Crusoe Family For light weight Notebook Computers running Microsoft Windows Power : Typical 1W ,Sleep 20mW For Internet Appliances running Mobile Linux Power : Typical 1.5W ,Sleep 60mW

  6. Crusoe Architecture • Compatible with any x86 App & OS • Code Morphing software “Morphs” x86 to VLIW • High Speed, Low Power VLIW Engine • VLIW + Code Morphing =x86 compatible solution

  7. Crusoe’s Core • The core of Crusoe is a VLIW (Very Long Instruction Word) architecture. • Crusoe is a four instruction wide VLIW architecture capable of four operations per clock cycle. The execution engine consists of: • 1 Branch predict unit • 1 Load Store unit • 2 ALU's • 1 FPU (Floating Point Unit)

  8. VLIW architecture Atoms and molecules: the instruction format • The execution units are called "atoms • These atoms are packaged together into either 128- or 64-bit chunks called "molecules"

  9. Crusoe Technology

  10. Advantages of aSoftware Based Microprocessor

  11. Hardware-Software Line The blue is hardware. The yellow is software.

  12. Code Morphing What are the keys to Code Morphing software? • Translates x86 compatible PC applications to VLIW hardware

  13. Translation of PC Applications to VLIW(x86 Instructions Converted to VLIW)

  14. Dynamic Software Execution

  15. Dynamic Software Execution(2nd Pass)

  16. Code Morphing What are the keys to Code Morphing software? • Translates x86 compatible PC applications to VLIW hardware • “Learns” and optimizes the application

  17. Crusoe ProcessorSoftware Optimization A Smart Processor analyzes the programs you run • Optimization begins as soon as programs are launched • Code MorphingTM detects the top running blocks • Uses techniques beyond out of order engine • Benefits • Good Performance • Low Power (reduced number of executions)

  18. Code Morphing What are the keys to Code Morphing software? • Translates x86 compatible PC applications to VLIW hardware • “Learns” and optimizes the application • Produces measurable benefits to Transmeta & users

  19. Processor Thermal Comparison Pentium III Playing DVD 105.5º C 221.9º F Crusoe Processor Playing DVD 48.2º C 118.8º F

  20. Code Morphing What are the keys to Code Morphing software? • Translates x86 compatible PC applications to VLIW hardware • “Learns” and optimizes the application • Produces measurable benefits to Transmeta & users • Provides a platform for future extensions (features)

  21. LongRun Technology A New Invention for Power Management “Maximizing Battery Life While Optimizing Performance”

  22. LongRun Technology in Operation • Crusoe processor starts off at 700MHz • Code Morphing software detects user activity • The software dynamically adjusts MHz and voltage to the most efficient power level

  23. How Crusoe Saves Power Power = Capacitance x Frequency x (Voltage)2 Related to number of logic transistors LongRun can dynamically adjust both only because of Code Morphing Software Crusoe has fewer transistors due to the software approach

  24. Conclusion • Crosoe is low-power and high perfromance processor. • Consists of a hardware VLIW core as its engine and a software layer called Code Morphing TM software. • Designed for lightweight (two to four pound) mobile computers and Internet access devices

  25. Reference • http://arstechnica.com/cpu/1q00/crusoe/ • http://www.transmeta.com • The Technology Behind Crusoe™ ,Processors Alexander Klaiber , Transmeta Corporation , January 2000 • http://www.hardwarecentral.com/hardwarecentral/previews/2557/1/ • http://www.beyond3d.com/articles/transmeta/

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