Whenever a computer is idle, we can either put it in stand by (where DRAM is still

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Whenever a computer is idle, we can either put it in stand by (where DRAM is still active) or we can let it hibernate. Assume that, to hibernate, we have to copy just the contents of DRAM to a nonvolatile medium such as Flash. If reading or writing a cacheline of size 64 bytes to Flash requires 2.56 μJ and DRAM requires 0.5 nJ, and if idle power consumption for DRAM is 1.6 W (for 8 GB), how long should a system be idle to benefit from hibernating? Assume a main memory of size 8 GB.

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Computer Architecture A Quantitative Approach

ISBN: 978-8178672663

5th edition

Authors: John L. Hennessy, David A. Patterson

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