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Graduate Research Seminar: Jack Lange12 noon - 1:30 p.m.
May 28, 2008
Ford ITW Auditorium – Room 1-350
Jack Lange
"Experiences with Speculative Remote Display"
To be presented at USENIX 08, Boston MA, in June 2008. | | Abstract: Remote display systems allow the client to predict the screen update events that a remote display server will send and applies them to the screen immediately, thus eliminating the network round-trip time and making the system more responsive in a wide-area or high loss environment. Incorrectly predicted events are undone when the actual events arrive from the server. The approach requires no server or protocol changes, and thus can work with existing systems. Since it is core to the feasibility of such a speculative remote display system, we have studied the predictability of the events that occur under typical workloads in two extant systems, Windows Remote Desktop and VNC. We found that simple, state-limited Markov models are often able to correctly predict the next event. Based on these results, we designed, implemented, and evaluated a speculative remote display extension to the VNC client. In our implementation, the end user can trade off between the responsiveness of the display and the level of temporarily displayed incorrect predictions. |
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