Everyone Virtualizes Everything But Time
Silviu Craciunas

Citation
Silviu Craciunas. "Everyone Virtualizes Everything But Time". Talk or presentation, 16, April, 2009; Poster presented at the 8th Biennial Ptolemy Miniconference.

Abstract
Imagine a virtualized execution environment (VEE) that virtualizes not only the host system it runs on, even not only other systems slower than the host system, but also maintains and adjusts the exact speed at which these systems operate, in strong temporal isolation from each other, when they execute code, process I/O, and manage memory. This is what we argue for and are trying to build. Just maintaining the exact speed at which virtualized systems operate is already a challenge but may result in an even higher proliferation of virtualization technology significantly beyond today's numbers. The potential of virtualized processors that actually perform exactly like their originals, or better, is clearly something to wish for. However, being able to adjust, at any time, the exact speed at which they operate, still in strong temporal isolation from each other, may even give rise to programming paradigms beyond putting nanosleeps of the best-guessed amount at the right place. Here is how we believe temporal isolation can be done and even be made programmable. The core part is a real-time O(1)-scheduler based on the notion of variable-bandwidth servers (VBS). A VBS-based system provides temporal isolation in the sense that the real time a given piece of code needs to execute is determined by the code itself and its inputs, independently of any other concurrent activities. Temporal isolation is even programmable with VBS since the code may choose the time (and jitter), at least within some host-dependent range.

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Citation formats

• HTML

  Silviu Craciunas. <a
  href="http://chess.eecs.berkeley.edu/pubs/564.html"
  ><i>Everyone Virtualizes Everything But
  Time</i></a>, Talk or presentation,  16, April,
  2009; Poster presented at the 8th Biennial Ptolemy
  Miniconference.

• Plain text

  Silviu Craciunas. "Everyone Virtualizes Everything But
  Time". Talk or presentation,  16, April, 2009; Poster
  presented at the 8th Biennial Ptolemy Miniconference.

• BibTeX

  @presentation{Craciunas09_EveryoneVirtualizesEverythingButTime,
      author = {Silviu Craciunas},
      title = {Everyone Virtualizes Everything But Time},
      day = {16},
      month = {April},
      year = {2009},
      note = {Poster presented at the 8th Biennial Ptolemy
                Miniconference},
      abstract = {Imagine a virtualized execution environment (VEE)
                that virtualizes not only the host system it runs
                on, even not only other systems slower than the
                host system, but also maintains and adjusts the
                exact speed at which these systems operate, in
                strong temporal isolation from each other, when
                they execute code, process I/O, and manage memory.
                This is what we argue for and are trying to build.
                Just maintaining the exact speed at which
                virtualized systems operate is already a challenge
                but may result in an even higher proliferation of
                virtualization technology significantly beyond
                today's numbers. The potential of virtualized
                processors that actually perform exactly like
                their originals, or better, is clearly something
                to wish for. However, being able to adjust, at any
                time, the exact speed at which they operate, still
                in strong temporal isolation from each other, may
                even give rise to programming paradigms beyond
                putting nanosleeps of the best-guessed amount at
                the right place. Here is how we believe temporal
                isolation can be done and even be made
                programmable. The core part is a real-time
                O(1)-scheduler based on the notion of
                variable-bandwidth servers (VBS). A VBS-based
                system provides temporal isolation in the sense
                that the real time a given piece of code needs to
                execute is determined by the code itself and its
                inputs, independently of any other concurrent
                activities. Temporal isolation is even
                programmable with VBS since the code may choose
                the time (and jitter), at least within some
                host-dependent range.},
      URL = {http://chess.eecs.berkeley.edu/pubs/564.html}
  }
  

Posted by Christopher Brooks on 17 Apr 2009.
Groups: ptolemy
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