Suppose you have a processor with a base CPI 1.0, assuming all references hit in the primary cache (L1), and a clock rate of 3 GHz. Assume that you have two caches (L1 and L2). L2 cache access time is 10 ns and main memory access time is 200 ns, including all the miss handling. Suppose the miss rate per instruction at the L1 cache is 10%, L2 cache is 5%. a) What is the effective CPI? b) What will be the effective CPI if we add a new cache (L3) that has 50 ns access time and reduce the miss rate to main memory to 1%?
Suppose you have a processor with a base CPI 1.0, assuming all references hit in the primary cache (L1), and a clock rate of 3 GHz. Assume that you have two caches (L1 and L2). L2 cache access time is 10 ns and main memory access time is 200 ns, including all the miss handling. Suppose the miss rate per instruction at the L1 cache is 10%, L2 cache is 5%. a) What is the effective CPI? b) What will be the effective CPI if we add a new cache (L3) that has 50 ns access time and reduce the miss rate to main memory to 1%?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Suppose you have a processor with a base CPI 1.0, assuming all references hit in the
primary cache (L1), and a clock rate of 3 GHz. Assume that you have two caches (L1
and L2). L2 cache access time is 10 ns and main memory access time is 200 ns,
including all the miss handling. Suppose the miss rate per instruction at the L1 cache is
10%, L2 cache is 5%.
a) What is the effective CPI?
b) What will be the effective CPI if we add a new cache (L3) that has 50 ns
access time and reduce the miss rate to main memory to 1%?
primary cache (L1), and a clock rate of 3 GHz. Assume that you have two caches (L1
and L2). L2 cache access time is 10 ns and main memory access time is 200 ns,
including all the miss handling. Suppose the miss rate per instruction at the L1 cache is
10%, L2 cache is 5%.
a) What is the effective CPI?
b) What will be the effective CPI if we add a new cache (L3) that has 50 ns
access time and reduce the miss rate to main memory to 1%?
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