Cache memory is a high-speed, small-sized type of computer memory that plays a crucial role in improving CPU (Central Processing Unit) performance. It serves as a bridge between the CPU and the slower, larger main memory (RAM). The primary purpose of cache memory is to reduce the time it takes for the CPU to access frequently used and instructions, thereby enhancing overall system performance. Cache memory is static RAM (SRAM) that stores its data in circuits.
A cache hit occurs when the CPU requests a piece of data or instruction, and that data is found in the cache memory. In other words, the data needed by the CPU is already present in the cache. A cache miss occurs when the CPU requests data or instructions that are not present in the cache memory. Cache hits are desirable because they result in very fast access times. The CPU can retrieve the required data directly from the cache, avoiding the longer latency associated with accessing data from main memory or even slower storage devices like hard drives.
RAM (Random Access Memory) is a type of computer memory that serves as the primary workspace for actively used data and instructions within a computer system. It utilizes dynamic RAM (DRAM), a form of memory that stores data in . Without RAM, the computer would have to load data directly from the HDD, which has significantly slower speeds, leading to bottlenecks in processing that could slow down the computer to an unusable point.
In cases where physical RAM is limited, modern operating systems use a technique called virtual memory. They allocate a portion of the device as virtual RAM. This process allows less frequently used data to be moved to virtual memory, enabling efficient memory management. RAM is significantly faster than secondary storage devices, providing quick access to data and instructions essential for rapid execution of applications. However, RAM is also volatile, meaning it loses its when the power is turned off.
Keywords
capacitors | storage | flip flop | volatile | memory | data | volatile | data |
