Correct option is D
Pipelining in Computer Architecture:
· Pipelining is a technique used in computer architecture to increase the throughput of a processor by executing multiple instructions simultaneously at different stages of the instruction pipeline.
Memory Access Speed:
· One of the potential bottlenecks in pipelining is the time it takes to access data from the main memory, which can slow down the entire process.
· To mitigate this, faster access to frequently used data or instructions is essential.
Role of Cache:
· Cache memory is a small, high-speed memory located close to the CPU. It stores copies of frequently accessed data and instructions from the main memory, enabling faster retrieval.
· When the CPU needs data, it first checks if the data is in the cache. If it is, the CPU can access it much faster than if it had to retrieve it from the main memory. This is known as a "cache hit."
· Caches are organized in levels (L1, L2, L3), with L1 being the fastest and smallest, and L3 being larger and slower compared to L1 and L2.
· Cache memory is specifically designed to reduce the time it takes to access memory, thereby improving the overall speed of memory access in pipelined processors.
