CS 121 Lecture Notes - Lecture 23: Hard Disk Drive, Cpu Cache
27 Jul 2020
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As we have just shown, a pc incorporates several types of cache. Usually, the different cache systems are organized by level, forming a hierarchy. In general, the closer you are to the cpu, the faster you can access it and the less storage capacity you have (see figure 4). Note that even the hard disk can be used as a cache for other devices (such as cd- To begin with, memory cache is usually broken down into two levels. The level closest to the cpu is the l1 cache (level 1 or tier 1). This is integrated into the same chip as the cpu, so access is at the working speed of the processor (the maximum speed). Of course, the l1 cache is very small (from 4 to 16 kb). The level 2 or l2 cache is shown below. Initially, it was installed on the motherboard, outside the. The current processors integrate it in the chip itself.
