Can someone help me please
Answer:
She made a profit of 450$
Explanation:
is an electronics standard that allows different kinds of electronic instruments to
communicate with each other and with computers.
Explanation:
MIDI is an acronym that stands for Musical Instrument Digital Interface. It is a standard protocol that helps to connects musical instruments with computers and several hardware devices to communicate. It was invented in the 80's as a way to standardize digital music hardwares.
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Assume that the execution time for a program is directly proportional to instruction access time. The access to an instruction in the cache is 10 times faster than access to an instruction in the main memory. If an instruction is not found in the cache, i.e., cache miss, it is fetched from the main memory to the cache and then fetched from the cache to be executed. Assume that a requested instruction will cause cache miss has a probability of 0.08. Let the speedup factor is defined as the ratio of program execution time without the cache to program execution time with the cache.
a. Calculate the speedup factor to execute such a program.
b. using this assumption, assuming that the cache is 20 times faster than the main memory.
Answer:
a. 5.81
B. 7.93
Explanation:
A.
X is the time it takes to load instructions from cache
10X = time to execute program
0.08 = probability of cache instructions
1-0.08 = 0.92(92% instructions are going to be loaded from cache).
Tc = time to execute with cache
Tc = 0.92X+0.08x10X
= 0.92X+0.8X
= 1.72X
Speed factor = tm/tc
= 10X/1.72X
= 5.81
B.
If cache is 20 times faster
Tm = 20X
Tc = 0.92X + 0.08 x 20X
= 0.92X + 1.6X
= 2.52X
Speed factor = 20X/2.52X
= 7.93