The graph models an ideal system that is perfectly scalable with the exception of garbage collection (GC). It plots number of processors (x-axis) against throughput (y-axis). It contains six plotted lines labeled 1% GC, 2%GC, 3% GC, 10% GC, 20% GC, and 30% GC. Each line represents the changing throughput for an application that spends the specified percentage of time used for garbage collection on a uniprocessor system versus on a multiprocessor system. The graph is described in the text that precedes it.

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