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Singularity

Singularity. A brief introduction to Microsoft’s newest operating system. Introduction. Designed from scratch by Microsoft Research Team Leaders Galen Hunt (OS background) Jim Larus (Programming Languages Background). Overview. Design Goals Kernel Architecture Processes

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Singularity

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  1. Singularity A brief introduction to Microsoft’s newest operating system.

  2. Introduction • Designed from scratch by Microsoft Research • Team Leaders • Galen Hunt (OS background) • Jim Larus (Programming Languages Background)

  3. Overview • Design Goals • Kernel Architecture • Processes • Interprocess Communication

  4. Design Goals • Designed strictly for dependability not performance. • Research OS • Based on Software advances not hardware advances

  5. Kernel Architecture • Singularity uses a Micro-Kernel • Process interact using a strongly versioned Application Binary Interface • Memory divided into three parts • Kernel space, User space, and Exchange Heap • Context Switching time greatly reduced

  6. Processes • Software Isolated Process • No shared memory • No memory hardware protection • Code must be verifiably correct • A process cannot dynamically load or generate code.

  7. Interprocess Communication • Communication through Strongly Typed Channels • Communication is governed by Channel contracts • All interprocess communication occurs in Exchange Heap.

  8. Channel Contract • specify message types and valid message exchanges contract C1 { in message Request(int x) requires x>0; out message Reply(int y); out message Error(); // Initial State state Start: Request? -> (Reply! or Error!) -> Start; }

  9. References • Hunt, G., Larus, J., Abadi, M., Aiken, M., Barham, P., Fahndrich, M., Hawblizel, C., Hodson, O., Levi, S., Murphy, N., Steensgaard, B., Tarditi, D., Wobber, T., Zill, B. (2005). An Overview of the Singularity Project. Redmond, WA: Microsoft Cooperation. Microsoft Research Technical Report; MST-TR-135. • Hunt, G., Larus, J. (2004). Singularity Technical Report 1: Singularity Design Motivation. Redmond, WA: Microsoft Cooperation. Microsoft Research Technical Report; MST-TR-105. • Mooney, Paul (2005). “Singularity OS.” URL: http://dotnetjunkies.com/weblog/paul/archive/2005/10/30/133490.aspx • Foley, Mary (2005). “Microsoft’s Other OS.” URL: http://www.microsoft-watch.com/article2/0,2180,1882174,00.asp

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