Integrated Cache Memory - HP Vectra XW Optimization Manual

2 Technical Reference
The Intel Pentium Pro Processor

Integrated Cache Memory

Cache memories are used by processors to accelerate access times for
frequently used data and instructions. A cache is located between the
processor and main memory, and stores copies of the last data read or
written by the processor. If the same data is requested again by the
processor, it will be supplied from the cache at significantly reduced
access time.
Pentium Pro processor
Processor core
Cache memories
Main memory
Cache memory has a much smaller capacity than main memory and
stores not only data, but also the memory addresses that correspond to
the data. When the processor reads or writes data in memory, the
address for that data is compared with the addresses stored in the
cache. If a match is found, the cache registers a cache hit and the data
will be read or written directly from or to the cache. If a match is not
found, a cache miss occurs and the cycle will be passed to main
memory with no time penalty.
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