An inexpensive way to construct a scalable display wall system isto use a cluster of PCs with commodity graphics accelerators to drive anarray of projectors. A challenge is to bring off-the-shelf sequentialapplications to run on such a display wall efficiently without usingexpensive, high-performance interconnects. We study two execution modelsfor a scalable display wall system: master-slave and synchronizedexecution models. We have designed and implemented four software tools,two for each execution model, including VDD (Virtual Display Driver),GLP (GL-DLL Replacement), SSE (System-level Synchronized Execution), andASE (Application-level Synchronized Execution). In order to support thesynchronized execution model, we have also designed a broadcast,speculative file cache to provide scalable I/O performance. We reportour experimental results with several 3D applications on the displaywall to understand the performance implications and tradeoffs of thesemethods
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