5 Advantages and Disadvantages of Cache Memory | Benefits and Drawbacks of Cache Memory

Introduction

In today’s post, we are going to learn what is cache memory in a computer?  and advantages and disadvantages of cache memory in computer systems with benefits and drawbacks of cache memory in easy language.

The cache memory is a very high-speed semiconductor computer memory, which is used to enhance the speed of the central processing unit {CPU}.

The cache memory is primarily used to store and handle programs and applications which are more frequently used by processors.

The cache memory is also responsible for the high performance of the CPU of the computer system as the response time for data exchange, access and transfer is quite low.

The cache memory is also called “Temporary Memory”.

Due to some of the silent features of cache memory, it is used globally to enhance the performance of the processor still there are some pros and cons of cache memory which we are going to discuss briefly in this article.

What is Cache Memory?

Cache memory is a very high-speed memory and is installed near the processor.

It is a type of volatile memory that also provides high-speed data access and exchange to the processor.

They also are helpful in storing computer programs, applications, and data with information.

Whenever any processing data is requested which has already had a sample in the cache memory, then it does not need to go to the main memory or to the hard disk to fetch the data.

The cache memory is the fastest memory available and it acts as a buffer between RAM and the CPU (Central Processing Unit).

The processor checks even if a corresponding entry is available in the cache every time it needs to read or write a location, and hence it reduces the time which is required to access the information from the main memory.

Hardware Cache is also called a processor cache and a physical component of the processor, it depends on how close the cache is to the processor core.

 It can be a primary and secondary cache memory.

The primary memory cache is directly joined to the processor.

The speed depends on the closeness and size of the cache.

The more data is stored in the cache the fast is processing and the small storage capacity of the chip results in slower processing.

The data present in the cache memory results in fast processing and vice versa the data present in the cache has less data and information which results in slow speed and data exchange.

Advantages and Disadvantages of Cache Memory With Infographic

Advantages and Disadvantages of Cache Memory | Pros and Cons of Cache Memory

Advantages of Cache Memory

  • Cache is faster and smaller memory which is used for storing the data and are used more frequently from the main memory locations.
  • A mapping function is used to correspond the main memory block in the cache memory.
  • A primary cache has a less access time comparable to processor register and it is always placed on the processor chip.
  • The secondary cache is mention as the level 2 cache and it is also placed in the processor chip.
  • It is generally placed between the primary cache and the rest of the memory.
  • Cache memory is faster than main memory as a result of two main reasons they are.
  • Static Random Access Memory (SRAM) is used in cache memory on the other hand, main memory uses Dynamic Random Access Memory (DRAM).
  • Cache memory stores the instructions which may be required by the processor next time; as it helps in recovering the information faster as compared to Random Access Memory (RAM).
  • It consumes less access time as compared to main memory.
  • It stored program that can be executed within a short period of time.
  • It stores data, instructions & information for a limited period.
  • The Cache memory is high speed semiconductor memory which can speed up the CPU.
  • It makes computer system more speedy.

Disadvantages of Cache Memory

  • This memory is more expensive than other memory like primary memory and secondary memory.
  • The storage capacity is completely in use.
  • Cache stores the data temporarily.
  • If the computer is turn off, the data stored in them is not saved it gets destroyed.
  • Cache memory comes at an increase marginal cost than main memory this can increase the cost of overall system.
  • Increased chip area are required for memory system.
  • Cache data is stored as long as the computer power is on.
  • It is a volatile memory.
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Types of Cache Memory

There are three types of Cache memory they are:
Level 1 (L1) cache or primary cache

It is the primary type of cache memory.

The size of the L1 cache is very small as compared to the other cache and the size is between 2 KB to 64 KB size of the cache is depending upon the computer processor.

It is an embedded register in the microprocessor (CPU). L1 cache firstly searches which are the instruction that is required by the CPU.

Examples of the registers are accumulator, an address register and Program counter, etc.

Level 2 (L2) cache or Secondary cache

It is the Secondary type of memory.

The size of the L2 cache is more than the L1 which is between 256 KB to 512 KB and it is located on the computer microprocessor.

If the searching instruction was not found in the L1 cache then searching was continued in the L2 cache by a computer microprocessor.

Level 3 (L3) Cache or Main Memory

The L3 cache is larger in size and slower in speed as compared to L1 and L2 and its size is between 1MB to 8MB. In Multicore processor in each core they have separate L1and L2 but between all these all cores share a common L3 cache.

L3 cache is double in speed compared to RAM.

Functions of Cache Memory

The cache memory can access the data faster than the primary and secondary memory.

Whenever the computer needs to access data then the cache memory comes into play.

It provides the processor with the most frequently requested data.

Cache memory increases performance and allows faster retrieval of data.

The most recent processed data is stored in the cache memory. The CPU can access the data more quickly compared to data in RAM.

Whenever the microprocessor starts processing the data, it first checks in cache memory.

The size of each cache block ranges from 1 to 16 bytes.

Every location has an index that corresponds to the location which has data to access this index is known as address.

Characteristics of Cache memory

  • The cache memory is a very high speed semiconductor memory.
  • These are known as semiconductor memories.
  • Data is lost in case if the power is loss or system is switched off.
  • It is used to hold those parts of data and program which are most frequently used by CPU.
  • Cache memory is faster than the main memory or primary memory.
  • It consumes less time to access anything as compared to main memory.
  • It stores the program that can be executed within a short period of time.
  • It stores the data for temporary use.

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