What is Cache Memory Capacity

Cache memory could be a high speed semiconductor store that wants to increase the speed and performance of the process unit. Cache memory Capacity is way costlier than primary and secondary memory. It acts as a buffer between the CPU and therefore the primary memory.

It’s used to hold the information and the components of the program that are used most often by the CPU.

By the operative system, the data and program parts needed for CPU processing are transferred from disk to primary memory so from primary memory to cache memory, from wherever the methoding unit will simply access them.

Whenever the CPU desires any data, the CPU 1st finds that data within the cache memory. Cache memory reduces the data interval from the most memory of the CPU. Thanks to that, the performance of the CPU will increase significantly.

It could be a small-sized chip-based store that’s abundant quicker than main memory, and sometimes, it’s conjointly known as processor memory, because it is incredibly getting ready to the CPU chip.

Cache memory is a temporary memory that is very quick and expensive.

Types of Cache Memory:

Traditionally, cache memory is split into “Levels”.

Level one Cache.
Level two Cache.
Level three Cache.

1. Level 1 Cache

This can be the primary level of cache memory which is thought as L1 cache or Level 1 cache. Level 1 cache memory is smaller in size and incorporates a higher speed. This memory is a gift within the processor that stores an awfully touch of data.

If the CPU is four-core, then every CPU core has its own Level one cache memory. Its speed is the same as the CPU. Level 1 cache memory size varies from 2KB to sixty four KB.

we are able to divide Level 1 cache memory into 2 components -:

Instruction Cache:

It serves to store the directions needed for CPU processing.

Data Cache:

It serves to store the information employed in CPU processing.

Once the process unit desires any information, then the CPU 1st checks it within the Level one cache. If that data is found by the CPU in the L1 Cache, then the CPU doesn’t check the remainder of the amount and continues processing therewith data.

2. Level two Cache:

The second level of cache memory is called L2 cache or Level 2 cache. Level 2 cache memory is slightly larger in size than L1 cache memory and its speed is additionally slightly not up to L1 cache memory.

Level 2 cache memory can exist anyplace within and out of the processor’s doors. If it’s outside the CPU, it is connected to the CPU via a high-speed bus.

If the CPU is four-core, then every CPU core could have its own separate Level two cache memory or may all use identical Level 2 cache memory.

It stores a bit more information than the L1 cache memory. the scale of Level 2 cache memory varies from 256 K to 512 KB.

3. Level three Cache:

This can be the third level of cache memory that is thought of as L3 cache or Level 3 cache memory. Level three cache memory isn’t offered to all told processors. this could air some high end processors.

it’s slightly larger in size than L1 cache and Level two cache, thanks to that its speed is additionally slightly not up to L1 cache and Level 2 cache memory.

Level 3 cache memory is employed to extend the performance of L1 cache and Level 2 cache. Level 3 cache memory exists outside the processor.

If the CPU is four-core then all CPU cores use identical level 3 cache memory. It stores a rather higher quantity of information than L1 cache and Level two cache memory. Level three cache memory size ranges from 1MB to 8MB.

How will Cache memory work?

Once the processor desires any data at the time of processing, then the CPU 1st realizes that data within the level 1 cache memory. If the CPU doesn’t find that data in level 1 cache memory, then the CPU appears for that data in the L2 cache memory and if the desired data isn’t found in it, then the CPU finds that data in the L3 cache memory.

If the processor gets that data in anyone’s cache memory then it’s known as cache hit Associate in Nursing if the information isn’t found in any cache memory then it is called cache miss.

If the CPU doesn’t realize data in any cache, then the CPU searches it within the primary memory and if that data is not found there, then the CPU searches for that data in the secondary memory. From wherever the CPU gets the desired data.

Once the pc is started for the primary time, or an application is opened for the first time, the data within the cache memory or RAM isn’t available. During this case, the processor gets the information directly from the magnetic disk drive.

Once a program is open, later whenever you begin your pc or open Associate in Nursing application, the CPU will get that data from cache memory or RAM.

Advantages of Cache Memory:

A number of the Advantages of cache memory are as follows:

Cache memory is way quicker than primary memory and secondary memory.
It stores all the data and directions utilized by the CPU, thereby increasing the performance of the CPU.
The information interval of cache memory is a smaller amount than primary memory.

Disadvantages of Cache Memory

A number of the Disadvantages of cache memory are as follows:

it’s far more valuable than the remainder of the memory.
The storage capability is sort of handy.
It stores the data temporarily.
Once the pc is turned off, the data kept in it is destroyed.