The Ripple Effect

Focus on Possibilities, Not Limits

Large memory, Amdahl, Gustafson, Multiprocessor, TidalScale

Computer Science is obsessed with "negative results" and "limits.” We seem to delight in pinpointing a terminus for virtually any technology or architecture – to map the place where the party ends.

Take, for example, Amdahl's Law, which seems to suggest that once you reach a certain point, parallelism doesn't help performance. Amdahl’s law has prevented many from believing that a market exists for bigger single systems since, since the law leads us to conclude larger multicore systems won't solve today's problems any faster.

Beware the Intuitively Obvious

The reasoning behind Amdahl’s Law turns on an assumption that all the parts of the problem must interact in such a way that

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