What is direct mapping?

Direct mapping is a method of storing information for easy access on your computer. The recently used information is stored in the cache, so the computer can quickly find the information in the next needed. In computer programming, there is a small part of the random access (RAM) cache that is reserved for easy data load. With direct mapping, each piece of data in the memory is assigned a space in the cache, which shares with other parts of data. The cache data is constantly rewritten because new data is needed.

The cache is arranged into rows. Each line is large enough to save one block of data and a brand to identify where the data comes from. When the user requires a piece of data, the computer first searches the cache to see if the information is there. If so, the information is returned to the user. This is known as the hit of the cache that is faster than obtaining data from the original location.

The percentage of requirements that result in intervention in the cache is called RapidLost hits. If the data requested by the user is not in the cache, the computer will find them in memory. A copy of the data will be stored in the cache to find it quickly until the user asks the next time and theoretically increases the level of intervention. All this happens behind the scenes. The user does not know whether the received data came from a cache or memory.

Direct mapping is one of the methods of deciding where the memory blocks will be stored in the cache. Each memory block is assigned a specific line in the cache. Because the cache is less than memory, more blocks will share one line in the cache. If the line is already full when a new block needs to be entered, an old block will be rewritten.

Although direct mapping is a very simple and easy way to design cache, it represents some problems. If the program is constantly approaching the multi -diagram of data blocks that share the same line in the direct mapping cache, the line will often be rewritten. This results in many errors because the data that the computer needs, jThey are less likely that the data that is actually in this line of cache at the moment. Thus, direct mapping has a lower intervention than other cache mapping models.