buzzword
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buzzword [2014/04/16 18:22] rachata |
buzzword [2014/04/18 18:19] rachata |
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| * MOESI | * MOESI | ||
| * Improvement over MESI protocol | * Improvement over MESI protocol | ||
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| + | ===== Lecture 29 (4/18 Wed.) ===== | ||
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| + | * Interference | ||
| + | * Complexity of the memory scheduler | ||
| + | * Ranking/prioritization has cost | ||
| + | * Complex scheduler has higher latency | ||
| + | * Performance metric for multicore/multithead applications | ||
| + | * Speedup | ||
| + | * Slowdown | ||
| + | * Harmonic vs wrighted | ||
| + | * Fairness mertic | ||
| + | * Maximum slowdown | ||
| + | * Why does it make sense | ||
| + | * Any scenario that it does not make sense? | ||
| + | * Predictable performance | ||
| + | * Why is it important? | ||
| + | * In server environment, different jobs are on the same server | ||
| + | * In a mobile environment, there are multiple sources that can slowdown other sources | ||
| + | * How to relate slowdown with request service rate | ||
| + | * MISE: soft slowdown guarantee | ||
| + | * BDI | ||
| + | * Memory wall | ||
| + | * What is the concern regarding the memory wall | ||
| + | * Size of the cache on the die (CPU die) | ||
| + | * One possible solution: cache compression | ||
| + | * What is the problems of existing cache compression mechanism | ||
| + | * Some are too complex | ||
| + | * Decompression is in the critical path | ||
| + | * Need to decompress when reading the data -> decompression should not be in the critical path | ||
| + | * Important factor to the performance | ||
| + | * Software compression is not good enough to compress everything | ||
| + | * Zero value compression | ||
| + | * Simple | ||
| + | * Good compression ratio | ||
| + | * What is data does not have many zeroes | ||
| + | * Frequent value compression | ||
| + | * Some data appear fequently | ||
| + | * Simple and good compression ratio | ||
| + | * have to profile | ||
| + | * decompression is complex | ||
| + | * Frequent pattern compression | ||
| + | * Still to complex in terms of decompression | ||
| + | * Based delta compression | ||
| + | * Easy to decompress but retain the benefit of compression | ||
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buzzword.txt · Last modified: 2015/04/27 18:20 by rachata
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