Consider a memory hierarchy with the following information: Hierarchy = primary cache, secondary cache, main memory tcl = Access time to primary cache = 5 ns tc2 = Access time to secondary cache = 20 ns tc3 = Access time to main memory = 70 ns h1 = hit ratio to primary cache = 0.9 h2 = hit ratio to secondary cache = 0.95 h3 = hit ratio to main memory =1 What is the average access time for this memory hierarchy?

Consider a memory hierarchy with the following information: Hierarchy = primary cache, secondary cache, main memory tcl = Access time to primary cache = 5 ns tc2 = Access time to secondary cache = 20 ns tc3 = Access time to main memory = 70 ns h1 = hit ratio to primary cache = 0.9 h2 = hit ratio to secondary cache = 0.95 h3 = hit ratio to main memory =1 What is the average access time for this memory hierarchy?

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Q: Consider a two level cache system. For 100 memory references, 20 misses in the first lyel cache and…

A: Introduction : given , 2 level cache system. Total memory reference = 100. 20 miss in level 1. 6…

Q: 4. Assume a cache of 32 Kbytes organized as 4 K lines of 8 bytes each. The main memory is 64 MB…

A: Solution: Given Cache_Size = 32KBNo_of_Lines = 4K1 Line Size = Block_Size = 8B Memory_Size =…

Q: In paging (given diagram), for CPU request there are two access time one for accessing page table…

A: Actually, given information: In paging (given diagram), for CPU request there are two access time…

Q: In paging (given diagram), for CPU request there are two access time one for accessing page table…

A: The memory access time can be reduced by using TLB(Translation Look-aside Buffer). it is a…

Q: QUESTION 4 Consider a direct mapped cache of 64 KİB. The block size is 128 bytes. The number of bits…

A: Solution : (4)cache memory capacity = 64 kiB = 2^16 BytesBlock size = 128 bytes = 2^7 bytesNumber of…

Q: Assume a cache of 32 Kbytes organized as 4 K lines of 8 bytes each. The main memory is 64 MB…

A: Given that, Cache size= 32 k bytes Number of lines= 4 k lines Size of line=8 bytes Size of main…

Q: Assume a cache of 64 Kbytes organized as 4 K lines of 8 bytes each. The main memory is 32 MB…

A: First some notes : As already mentioned, each cache block consists of 4 (= 2^2) words. Thus, lowest…

Q: Assume a cache of 64 Kbytes organized as 4 K lines of 8 bytes each. The main memory is 32 MB…

A: Solution:

Q: Consider a memory system with a cache access time of 100ns and a memory access time of 1200ns. If…

A: Formula to calculate the Effective Access Time: Effective Access Time =Cache Hit Ratio×Cache Access…

Q: Consider a memory system with a cache access time of 100ns and a memory access time of 1200ns. If…

A: Hit ratio: Hit ratio is divide the number of cache hits with the sum of the number of cache hits,…

Q: Consider a memory system with a cache access time of 100ns and a memory access time of 1200ns. If…

A: Objective: The cache access time and memory access time are given for a memory system. We need to…

Q: Consider a memory system with a cache access time of 100ns and a memory access time of 1200ns. If…

A: Given cache access time(c)=100ns memory access time (m) =1200ns as the effective access…

Q: Consider a memory system with a cache access time of 100ns and a memory access time of 1200ns. If…

A: Given cache access time (c)=100ns memory access time(m)= 1200ns As the effective access…

Q: In paging (given diagram), for CPU request there are two access time one for accessing page table…

A: In paging (given diagram), for CPU request there are two access time one for accessing page table…

Q: Consider a computer with the following characteristics: total of IMbyte of main memory, Content of…

A: Given: Main memory size is 1 MB. Word size is 1 Byte. Block size is 16 bytes Cache size is 64 Kbytes…

Q: Consider a main memory with size 512MB with cache size 64KB and memory block is 4 bytes. Assume…

A: We are given main memory as 512 MB with 64KB cache. And block offset is 4 bytes. We are going to…

Q: . Which has the lower average memory access time for both split and unified cache? Consider the…

A: Actually, cache is a fast access memory. It measured in terms of quality called as hit ratio.

Q: n paging (given diagram), for CPU request there are two access time one for accessing page table and…

A: paging is the method of retrieving the process from secondary storage into main memory, where as…

Q: Consider an L1 cache with an access time of 1 ns and a hit ratio of Suppose that we can change the…

A: Ans: i) Given, access time =1 ns Hit ratio =0.95, new access time=1.5ns, new hit ratio=0.97 It…

Q: Consider a Direct Mapped cache with 32-bit memory address reference word addressable. Assume a 2…

A: check further steps for the answer :

Q: What hit ratio is required to reduce the effective memory access time, from 200 nsecs to 140 nsecs,…

A: Introduction :

Q: What hit ratio is required to reduce the effective memory access time, from 200 nsecs effective…

A: Given data is effective memory access time from 200 nano - secs to 140 nano-secs

Q: Assume a cache of 1 MB organized as 32 bytes each line. The main memory is 256 MB. a. Determine the…

A: Cache is =1MB; and main memory=256MB; and the line size is =32bytes The number of…

Q: Assume a cache of 1 MB organized as 32 bytes each line. The main memory is 256 MB. a. Determine the…

A: (a) number of blocks = 2^20 / 32 = 2^15 =32*1024=32768so there are 32768 blocks in main memory . (b)…

Q: Consider a cache memory having the hit ratios for read and write operations are 70% and 80%…

A: Answer :

Q: Consider a direct mapped cache with 8 cache blocks (0-7). If the memory block requests are in the…

A: I have Provided this answer with full description in step-2.

Q: Suppose the cache access time is 1 ns, main memory access time is 100 ns and the cache hit rate is…

A: Effective Memory Time = cache hit rate * cache access time + cache miss rate ( cache access time +…

Q: Assume a cache of 1 MB organized as 32 bytes each line. The main memory is 256 MB. a. Determine the…

A: Actually, cache memory is a fast access memory.

Q: Given a 2-way set-associative cache with 2 entries (sets) and 1 byte block size (no offset), what is…

Q: Q4) For a set associative mapped cache design with a 10bit address, First 3 bits represent tag, next…

A: Given : Number of address bits = 10 bits Tag bits = 3 bits Index bits = 3 bits Offset bits = 4…

Q: Assume a 64 KiB direct-mapped cache with a 32-byte block. What is the miss rate for the address…

A: Given scenario: Direct-mapped cache 64KiB with 32-byte block. The given address streams are 0, 2,…