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Figure 5.24
Warm cache, MP = 10. |
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retain a significant portion of their working set from a previous execution, this cache is said to be a warm cache. Caches that have no history from prior executions are said to be cold caches. Clearly, the individual transactions are dealing with a cold cache for their working set. In a multiprogrammed environment, the cache may be either warm or cold depending upon the cache size, the degree of multiprogramming involved, and the average working set requirement of each task. With low degrees of multiprogramming and reasonable Q factors, a warm cache approximates the single user (DTMR) in the presence of the system (Figures 5.10 and 5.22 ad- |
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Figure 5.25
Warm cache, MP = 2. |
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