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Consider a machine with a 2-way set associative data cache of size 64 Kbytes and block size 16 bytes. The cache is
managed using 32 bit virtual addresses and the page size is 4 Kbytes. A program to be run on this machine begins as
follows:
double ARR[1024][1024];
int i, j;
/*Initialize array ARR to 0.0 */
for(i = 0; i < 1024; i++)
for(j = 0; j < 1024; j++)
ARR[i][j] = 0.0;
The size of double is 8 bytes. Array ARR is located in memory starting at the beginning of virtual page 0xFF000 and stored in
row major order. The cache is initially empty and no pre-fetching is done. The only data memory references made by the
program are those to array ARR.
The cache hit ratio for this initialization loop is
  • a)
    0%
  • b)
    25%
  • c)
    50%
  • d)
    75%
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider a machine with a 2-way set associative data cache of size 64 ...
block size=16B and one element=8B.so in one block 2 element will be stored.
for 1024*1024 element num of block required=1024*1024/2 =2^19 blocks required.
in one block first element will be a miss and second one is hit(since we are transferring two unit at a time)
=>hit ratio=total hit/total reference
=2^19/2^20
=1/2=0.5
=0.5*100=50%
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Consider a machine with a 2-way set associative data cache of size 64 Kbytes and block size 16 bytes. The cache ismanaged using 32 bit virtual addresses and the page size is 4 Kbytes. A program to be run on this machine begins asfollows:double ARR[1024][1024];int i, j;/*Initialize array ARR to 0.0 */for(i = 0; i < 1024; i++)for(j = 0; j < 1024; j++)ARR[i][j] = 0.0;The size of double is 8 bytes. Array ARR is located in memory starting at the beginning of virtual page 0xFF000 and stored inrow major order. The cache is initially empty and no pre-fetching is done. The only data memory references made by theprogram are those to array ARR.The cache hit ratio for this initialization loop isa)0%b)25%c)50%d)75%Correct answer is option 'C'. Can you explain this answer?
Question Description
Consider a machine with a 2-way set associative data cache of size 64 Kbytes and block size 16 bytes. The cache ismanaged using 32 bit virtual addresses and the page size is 4 Kbytes. A program to be run on this machine begins asfollows:double ARR[1024][1024];int i, j;/*Initialize array ARR to 0.0 */for(i = 0; i < 1024; i++)for(j = 0; j < 1024; j++)ARR[i][j] = 0.0;The size of double is 8 bytes. Array ARR is located in memory starting at the beginning of virtual page 0xFF000 and stored inrow major order. The cache is initially empty and no pre-fetching is done. The only data memory references made by theprogram are those to array ARR.The cache hit ratio for this initialization loop isa)0%b)25%c)50%d)75%Correct answer is option 'C'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider a machine with a 2-way set associative data cache of size 64 Kbytes and block size 16 bytes. The cache ismanaged using 32 bit virtual addresses and the page size is 4 Kbytes. A program to be run on this machine begins asfollows:double ARR[1024][1024];int i, j;/*Initialize array ARR to 0.0 */for(i = 0; i < 1024; i++)for(j = 0; j < 1024; j++)ARR[i][j] = 0.0;The size of double is 8 bytes. Array ARR is located in memory starting at the beginning of virtual page 0xFF000 and stored inrow major order. The cache is initially empty and no pre-fetching is done. The only data memory references made by theprogram are those to array ARR.The cache hit ratio for this initialization loop isa)0%b)25%c)50%d)75%Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a machine with a 2-way set associative data cache of size 64 Kbytes and block size 16 bytes. The cache ismanaged using 32 bit virtual addresses and the page size is 4 Kbytes. A program to be run on this machine begins asfollows:double ARR[1024][1024];int i, j;/*Initialize array ARR to 0.0 */for(i = 0; i < 1024; i++)for(j = 0; j < 1024; j++)ARR[i][j] = 0.0;The size of double is 8 bytes. Array ARR is located in memory starting at the beginning of virtual page 0xFF000 and stored inrow major order. The cache is initially empty and no pre-fetching is done. The only data memory references made by theprogram are those to array ARR.The cache hit ratio for this initialization loop isa)0%b)25%c)50%d)75%Correct answer is option 'C'. Can you explain this answer?.
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