A compulsory cache miss happens the first time the CPU reads any bytes in a memory Such cache misses are inevitable, and the entire memory block must be brought into the How many compulsory misses in the data cache will occur when running the above cod Give your gnswer in a base 10 number (and only write down the number).
A compulsory cache miss happens the first time the CPU reads any bytes in a memory Such cache misses are inevitable, and the entire memory block must be brought into the How many compulsory misses in the data cache will occur when running the above cod Give your gnswer in a base 10 number (and only write down the number).
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...
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Question
![Consider the following C code:
int A[16];
int B[16];
int m;
...
//A large chunk of code that does NOT access
//arrays A and B.
..
for (int i=0; i<10; i++) {
for (int j=0; j<16; j++) {
B[j] = m * A[j] + B[j];
}
}
Assume this program runs on a 32-bit machine, i.e., the CPU loads/stores 4 bytes from memory
in one go. This machine has a 16-bit memory address, and each memory block stores 16 bytes.
This machine has a direct-mapped data cache with 16 cache lines.
Array A starts at address O, and B starts at address 256 - both arrays begin at a memory block
boundary. Each element of arrays A and B occupies 4 bytes. The values of i, j, and m are stored
in CPU registers.
Q5.1
A compulsory cache miss happens the first time the CPU reads any bytes in a memory block.
Such cache misses are inevitable, and the entire memory block must be brought into the cache.
How many compulsory misses in the data cache will occur when running the above code?
Give your answer in a base 10 number (and only write down the number).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F28b83179-3bea-434e-892e-0abcd546a6b9%2F6e844d95-0897-4c37-a42b-41758219fc68%2F4r646cp_processed.png&w=3840&q=75)
Transcribed Image Text:Consider the following C code:
int A[16];
int B[16];
int m;
...
//A large chunk of code that does NOT access
//arrays A and B.
..
for (int i=0; i<10; i++) {
for (int j=0; j<16; j++) {
B[j] = m * A[j] + B[j];
}
}
Assume this program runs on a 32-bit machine, i.e., the CPU loads/stores 4 bytes from memory
in one go. This machine has a 16-bit memory address, and each memory block stores 16 bytes.
This machine has a direct-mapped data cache with 16 cache lines.
Array A starts at address O, and B starts at address 256 - both arrays begin at a memory block
boundary. Each element of arrays A and B occupies 4 bytes. The values of i, j, and m are stored
in CPU registers.
Q5.1
A compulsory cache miss happens the first time the CPU reads any bytes in a memory block.
Such cache misses are inevitable, and the entire memory block must be brought into the cache.
How many compulsory misses in the data cache will occur when running the above code?
Give your answer in a base 10 number (and only write down the number).
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