Which is the fastest Computer Memory- Register or Cache? - General Knowledge Today
execution of an instruction and receives result of the most arithmetic and General purpose registers store data and intermediate results during the execution of a program. Two or three levels of memories such as main memory , secondary memory and cache memory The secondary memory is a mass storage memory. Register a part of the computer processor which is used to hold a computer instruction, perform mathematical operation as storage address, or. What is the difference between registers, buffers and main memory cache) or any other interface storage to deal with flow control/credits etc.
Removable media such as tape cartridges that can be automatically loaded, as in a tape libraryare nearline, while cartridges that must be manually loaded are offline. Most modern CPUs are so fast that for most program workloads, the bottleneck is the locality of reference of memory accesses and the efficiency of the caching and memory transfer between different levels of the hierarchy[ citation needed ].
The resulting load on memory use is known as pressure respectively register pressure, cache pressure, and main memory pressure.Registers and RAM: Crash Course Computer Science #6
Terms for data being missing from a higher level and needing to be fetched from a lower level are, respectively: Modern programming languages mainly assume two levels of memory, main memory and disk storage, though in assembly language and inline assemblers in languages such as Cregisters can be directly accessed.
Taking optimal advantage of the memory hierarchy requires the cooperation of programmers, hardware, and compilers as well as underlying support from the operating system: Hardware is responsible for moving data between memory and caches. Optimizing compilers are responsible for generating code that, when executed, will cause the hardware to use caches and registers efficiently. Many programmers assume one level of memory.
This works fine until the application hits a performance wall. Registers are the memory locations that are directly accessible by the processor.
Which is the fastest Computer Memory- Register or Cache?
The registers hold the instruction or operands that is currently being accessed by the CPU. Registers are the high-speed accessible storage elements. The processor accesses the registers within one CPU clock cycle. In fact, the processor can decode the instructions and perform operations on the register contents at the rate of more than one operation per CPU clock cycle.
So we can say that processor can access registers faster than the main memory. The register is measured in bits like a processor may have bit, bit, or bit registers.
Difference between a CPU's cache and register
The number of register bits specifies the speed and power of CPU. For example, a CPU which has bit register can access the bit instructions at a time.
The CPU which has bit register can execute bit instructions. Hence, more the number of bits of register more is the speed and power of CPU. The computer registers are categorized as follow: Data Register is a bit register which holds the operands to be operated by the processor. Address Register is a bit register that holds the address of a memory location. Accumulator is also a bit register which holds the result computed by the processor. Instruction Register is a bit register that holds the instruction code that has to currently executed.
Program Counter is a bit register that holds the address of instruction that is to be executed by the processor. Temporary Register is a bit register that holds the temporary intermediate result computed by the processor. Input Register is an 8-bit register that holds the input character received from an input device and delivered it to the Accumulator.
Output Register is an 8-bit register that holds the output character received from Accumulator and deliver it to the output device. Definition of Memory Memory is a hardware device used to store computer programs, instructions and data. The memory that is internal to the processor is a primary memory RAMand the memory that is external to the processor is a secondary memory Hard Drive.