Homework problem 621 category 1 the following table

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Unformatted text preview: ons and data in L2 that make it impossible for the entire array to fit in the L2 cache. Slicing through the mountain in the opposite direction, holding the working set size constant, gives us some insight into the impact of spatial locality on the read throughput. For example, Figure 6.44 shows the slice for a fixed working set size of 256 KB. This slice cuts along the L2 ridge in Figure 6.42, where the working set fits entirely in the L2 cache, but is too large for the L1 cache. Notice how the read throughput decreases steadily as the stride increases from 1 to 8 words. In this region of the mountain, a read miss in L1 causes a block to be transferred from L2 to L1. This is followed by some number of hits on the block in L1, depending on the stride. As the stride increases, the ratio of L1 misses to L1 hits increases. Since misses are served slower than hits, the read throughput decreases. Once the stride reaches 8 words, which on this system equals the block size, every read request misses in L1 and must be serve...
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This note was uploaded on 09/02/2010 for the course ELECTRICAL 360 taught by Professor Schultz during the Spring '10 term at BYU.

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