What is CPU cache?
Central Processing Unit (CPU) Cache is a type of random access (RAM) that is created directly into the microprocessor of the computer and is marked as L1 cache. Further diversity of cache CPU is limited capacity L2 RAM (SRAM) chips on the motherboard. Both of these types of memory are the first to which the microprocessor proceeds in performing routine instructions before using standard RAM, providing processors of improved performance characteristics.
Practice Placing the CPU cache memory on microprocessors for instant access to memory to speed up data access to the processor has been made since the computer processor 80486 produced in 1989, which was built into it by the basic L1 cache register. In 1995, in 1995, a larger L2 cache level was used, which were directly integrated into the processor functionality. It is assumed that the main memory of the system itself is used. Each level of cache is designed to be larger and slower in performance,How its distance from the microprocessor increases. The earliest levels of the L1 CPU cache were 8 kilobytes, while the L2 cache on the machines has exceeded the size of 6 megabytes since 2007, and some systems have incorporated the memory of L4 to 64 megabytes since 2011.
The high -speed, low -voltage memories of the cache for microprocessors focus around the way they perform instructions. As a microprocessor, it performs operations, it must traditionally send data requirements to the main memory in the system bus. The computer is a very slow process, so CPU designers have built shortcuts for data for data that is repeatedly accessible by a microprocessor. When the data are often accessible into the CPU cache, the microphone -processor can perform operations much faster and more efficient. For this reason, this central procedural units memory is often referred to as a cacheme in instructions or cache data where it is directly bound to the functionality of the microprocessor and hardware of the computer itself. On the other hand, most of the data stored in the standard RAM on the computer is a software cache for many programs that the computer runs simultaneously.
l1 cache is also often referred to as protected memory or memory with allocation without writing, as the data stored in this cache is necessary for the function of the computer. If accidentally rewritten, the computer may suffer a general protection error where it is forced to turn off and restart to clean the damaged cPU cache. Different levels of CPU cache have a buffer writing function, where they will write the data stored in the main memory to release space in the cache when more often accessible operations need to process higher priority.
A large amount of CPU cache will improve the microprocessor performance to a point where it can overcome a faster processor that has less cache memory into the system. Bus speed on the front (FSB) isAlso helpful in determining the power of the microprocessor. The bus speeds in general were traditionally a narrow place for performance characteristics on personal computers (PC), where the processing must be routed back and forth through the bus into memory. High FSB rates since 2011 for Core 2 processors are at 1,600 Megahertz, ie 1600 million cycles per second, computer instructional sets.