The cache hit rate to execute a given code is 92%, what is the miss rate?
AMAT = Time for a hit + (Miss rate x Miss penalty)
For a data cache with a 4% miss rate and a 5-cycle hit latency, calculate the average memory access time (AMAT). Assume that latency to memory and the cache miss penalty together is 100 cycles. Note: The cache must be accessed after memory returns the data.
Assume the miss rate of an instruction cache is 3% and the miss rate of the data cache is 5%. If a processor has a CPI of 2 without any memory stalls and the miss penalty is 120 cycles for all misses, determine how much faster a processor would run with a perfect cache that never missed. Assume the frequency of all loads and stores is 36%. *The size of the tag field-64- (n + m 2). ** The total...
(a) Given a 100 MHz machine with a with a miss penalty of 20 cycles, a hit time of 2 cycles, and a miss rate of 5%, calculate the average memory access time (AMAT). (b) Suppose doubling the size of the cache decrease the miss rate to 3%, but causes the hit time to increases to 3 cycles and the miss penalty to increase to 21 cycles. What is the AMAT of the new machine?
A particular computer has a single level cache with a miss rate of 6.85%. You are required to design a second level cache that brings the global miss rate of the whole cache system to 3.98%. what would be the miss rate percent required for the second level cache?
Base machine has a 2.4GHz clock rate. There is L1 and L2 cache. L1 cache is 256K, direct mapped write through. 90% (read) hit rate without penalty, miss penalty is 4 cycles. (cost of reading L2) All writes take 1 cycle. L2 cache is 2MB, 4 way set associative write back. 95% hit rate, 60 cycle miss penalty (cost of reading memory). 30% of all instructions are reads, 10% writes. All instructions take 1 cycle - except reads which take...
For a special computer system with 3 levels of cache, here are
the hit times and miss % for the different levels of cache
Please calculate the access time for this computer system.
Hit Miss% L1 Cache 1 Cycle 5% L2 Cache 5 Cycles 10% L3 Cache 20 Cycles 15% Main Memory 100 Cycles 20%
For gcc, the frequency for all loads and stores is 36%. Instruction cache miss rate is 5%. Data cache miss rate is 10%. If a machine has a CPI of 2 without memory stalls and the miss penalty is 40 cycles for all misses, how much faster is a machine with a perfect cache? increase the performance by doubling its clock rate. Since the main memory speed is unlikely to change, assume that the absolute time to handle a cache...
Assume a cache with a write-through policy, non-write allocate. Your cache has a miss rate of 5%. There is a 150 cycle miss penalty. Additionally, it takes an extra 30 cycles to do a write. Your program has a base CPI of 1, is 20% loads, and 5% stores. What will its CPI be?
Suppose you have a machine with separate I- and D- caches. The miss rate on the I-cache is 2.6% , and on the D-cache 3.8%. On an I-cache hit, the value can be read in the same cycle the data is requesfed. On a D-cache hit, one additional cycle is required to read the value. The miss penalty is 100 cycles for data cache, 150 for I-cache. 40% of the instructions on this RISC machine are LW or SW instructions,...
why the miss rate is decrease as the number of blocks in cache increases ?????