What is Cache Memory and How it works?

If you are using a computer or a smartphone, one thing you will notice is the cache memory. Where your smartphone or computer may have a lot of storage and the fastest and least amount of memory is cache memory. So, if you still don’t know what is cache memory and how it works, keep watching today’s article in full.

Friends, in today’s article, I am going to tell you what is cache memory, how it works and how important it is on a smartphone or computer. I hope that after watching this article you will be able to know about cache memory when viewing any processor. So watch the article in full.

What is cache memory and how it works?

Before we know cache memory, we need to know storage first. Your device may have many types of storage. The most common of these is internal storage, which stores all of your device’s data. If it is a computer, it can be SSD or hard disk drive. That we all know.

The processors used in our mobiles can work from 1 GHz to 4 GHz. However, some processors can work up to 5 GHz. In this case, our mobile storage cannot transfer data as fast as a processor processes data. And in this case we do not use RAM, that is, Random Access Memory. Where the speed of a RAM is much faster than our storage.

But in this case RAM cannot send and receive data to our processor so fast. However there are some current DDR4 RAMs, they work up to 3200 MHz. They can send and receive data to the processor at equal speed. Our RAM but the processor can send and receive data at equal speed. But the problem is that our modern processors are not single core, but multi-core.

What is Cache Memory and How it works?
What is Cache Memory and How it works?

In this case the processor can be dual core, quad core or octa core. And if each of these cores works together at 3.2 GHz, then our RAM will not be able to send and receive data to each core at the same time. And in this case we do not use cash memory. Cache memory is much faster than the internal storage or RAM of our mobile or other devices. In other words, cache memory is the fastest storage in the case of a smartphone, computer or laptop.

Cache memory is called Static RAM; And the RAM that we use outside is called D RAM or Dynamic Ram. You can call cache memory some of the processor’s own RAM. Inside which the processor stores its most important things, which are commonly use. In this case, suppose your processor is a car mechanic. In this case, your cache memory will be the car mechanic’s toolbox, where he has stored the important tools; The tools that are needed to make the car better. The processor uses Cache Memo TK in exactly the same way, stores the data that is being used in the processor too much and so that he can access it very easily.

And it makes your processing faster. And we divide this cache memory into three parts. These are Level 1, Level 2 and Level 3; Which we know as L1, L2 and L3.

Level 1 Cache: So, Level 1 or L1 is the fastest and very small amount in a processor. Each core has its own L1 cache which is create inside the core. And each core can use its own L1 cache, which is why Level 1 cache or L1 cache is the fastest.

Where a processor’s Level 1 cache can range from 2KB to 64KB. Where it seems very little but it is much more useful and there is no need for so much space to store important data. However, I am discussing the cache memory space a little below. So keep watching the tune.

Level 2 Cache: Then comes Level 2 Cache or L2 Cache. So look, the L2 cache may have been created inside or outside the processor. If it is built outside the CPU, it connects very well to the processor’s cores, so that the processor’s cores can easily access it. Here I am saying that Level 2 cache is a little slower than Level 1 cache. A Level 2 cache can range from 256KB to 512KB.

Level 3 Cache: The latest is Level 3 or L3 cache and it is mainly find in premium processors. Level 3 cache is mainly use to improve the performance of L1 and L2. By comparison, Level 1 and Level 2 cache are a bit slower than Level 3 cache, but they are faster than RAM and internal storage. Level 3 cache of a processor uses cache memory ranging from 1 MB to 20 MB.

Here it give in the middle of each core. That is, each core here can use this cache according to its own requirement or requirement. So, let’s illustrate this with an example.

In this case, suppose your processor needs a data. In this case your processor will first check it in your L1 cache, then if it can’t find the data in L1 cache then it will check in L2 cache and if it can’t find that data in L2 cache then it will check in L3 cache. This way the L3 cache and if that data is not found then it will check in your RAM and if it is not found in RAM then it will pick it up from the internal storage. So, if that data stored in your cache memory then your processor would do that job very easily and in less time.

In this case, if you do not have that data in cache memory, then you have to take it from internal storage or RAM; For that reason it may take a little time to process here. One question that may come to mind here is that the more data a processor can store in cache memory, the more work it can accomplish in less time. So why is there so little storage in the case of cache memory?

Cash memory is much faster and at the same time much more premium than the internal storage and RAM that our mobiles have. That is why a cache of memory give in very small amounts. Moreover, the processor cache stores a lot of important data in memory, which is much smaller in size. The cache memory of a processor is satisfactory from 5MB to 12MB. That is why the cache memory in the processor give as megabytes.

Here Android users can do a thought. And that is, when we use an application, those applications occupy a lot of cache memory. Where this amount is a lot, say 50MB, 100MB, 150MB etc. Here it is not the cache memory that is apply to the processor. This is a separate cache that is useful for your application. In these discussions of cache memory you may or may not already understand what cache memory actually is.

I hope you already understand what is cache memory and how it works. See you next with a new tech.

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