It also gives the number of the block in main memory, modulo This determines the mapping of blocks into lines. Note that no two blocks that map into the same cache set have the same tag number. It significantly improves the hit ratio over direct mapping. Further increases in the number of lines per set have little effect. Processor on which Feature First Problem Solution Appears Add external cache using External memory slower than the system faster memory bus.
Move external cache on- Increased processor speed results in chip, operating at the external bus becoming a bottleneck for same speed as the cache access. Internal cache is rather small, due to Add external L2 cache Table 4. Unit simultaneously require access to the Cache cache. Create separate back-side Pentium Pro bus that runs at higher speed than the main Increased processor speed results in front-side external bus. Move L2 cache on to the Pentium II processor chip. Some applications deal with massive Add external L3 cache.
Pentium III databases and must have rapid access to large amounts of data. The on-chip caches Move L3 cache on-chip. Pentium 4 are too small. Table 4. Computer architecture By Farhi Kiani.
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