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Memory Systems by David Wang, Spencer Ng, Bruce Jacob

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CHAPTER 5

Implementation Issues

This chapter presents the physical implementation (gate/transistor level) and architectural organization of modern-day caches, including a discussion of how this fits in a typical pipeline. One of the most important implementation issues today is that of dealing with the increasingly significant effects of technology scaling. In modern cache implementation, technology scaling exposes and/or exacerbates the following problems:

• The subthreshold leakage current caused by decreasing transistor threshold voltages becomes larger, increasing static power dissipation and requiring both evolutionary and revolutionary solutions to offset its effects.

• The decreasing amount of charge stored per bit makes it easier to ...

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