Consider a system with 2 level caches. Access times of Level 1 cache, Level 2 cache, and main memory are 1 ns, 10ns, and 500 ns, respectively. The hit rates of Level 1 and Level 2 caches are 0.8 to 0.9, respectively. What is the average access time of the system ignoring the search time within the cache? (consider simultaneous access) 1. 2. 3. 4. 13.0 ns 12.8 ns 12.6 ns 12.4 ns

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider a system with 2 level caches.
Access times of Level 1 cache, Level 2
cache, and main memory are 1 ns, 10ns, and
500 ns, respectively. The hit rates of Level 1
and Level 2 caches are 0.8 to 0.9,
respectively. What is the average access
time of the system ignoring the search time
within the cache? (consider
simultaneous access)
1.
2.
3.
4.
13.0 ns
12.8 ns
12.6 ns
12.4 ns
Transcribed Image Text:Consider a system with 2 level caches. Access times of Level 1 cache, Level 2 cache, and main memory are 1 ns, 10ns, and 500 ns, respectively. The hit rates of Level 1 and Level 2 caches are 0.8 to 0.9, respectively. What is the average access time of the system ignoring the search time within the cache? (consider simultaneous access) 1. 2. 3. 4. 13.0 ns 12.8 ns 12.6 ns 12.4 ns
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