What is the size of a cache?

What is the size of a cache?

Common cache line sizes are 32, 64 and 128 bytes. A cache can only hold a limited number of lines, determined by the cache size. For example, a 64 kilobyte cache with 64-byte lines has 1024 cache lines.

How much cache is good for a laptop?

It’s hard to say how much processor cache you need, but 3-6MB is typical in current laptops and PCs. But given the performance benefits, more cache and a slower clock speed is likely to be faster than the opposite.

What is L2 L3 cache?

L3 Cache. • Location. It is directly built into the processor and it is used to store CPU’s recently accessed information. It is located outside and separated from the CPU chip core.

How do I choose a cache size?

Within these hard limits, the factors that determine appropriate cache size include the number of users working on the machine, the size of the files with which they usually work, and (for a memory cache) the number of processes that usually run on the machine.

Is L2 cache important?

The performance impact even is significant enough to say that L2 cache is the most important performance factor on an x86 microprocessor. Disabling the L2 cache will reduce system performance more than disabling a second CPU core of a dual-core processor. However, cache memory isn’t only a performance factor.

What size cache is good?

While main memory capacities are somewhere between 512 MB and 4 GB today, cache sizes are in the area of 256 kB to 8 MB, depending on the processor models. Yet, even a small 256-kB or 512-kB cache is enough to deliver substantial performance gains that most of us take for granted today.

What is the total size of a 64 KB cache?

Ans: We know that 64 KB is 64K words, which is 2 to the power 14 words, and, with a block size of one word, 2 to the power 14 blocks. Each block hs 32 bits of data plus a tag, which is 32-14-2 bits, plus a valid bit. Thus, the total cache size is (2 to the power 14)*49= 784 bits or 98KB for a 64-KB cache.

How many lines or blocks are there in the cache?

Each Block/line in cache contains (2^7)bytes -therefore number of lines or blocks in cache is:(2^12)/(2^7)=2^5blocks or lines in a cache As it is 4 way set associative, each set contains 4 blocks, number of sets in a cache is : (2^5)/2^2 = 2^3sets are there. so from these we got to know that 3 bits are required for adressing set offset.

How many bytes are in a 4-way set associative cache line?

I’m struggling to solve this question, I’ve looked around but all of the similar questions are more advanced than mine, making use of logs, it’s more advanced than we’ve done in our class. Here’s the question: Suppose you have a 4-way set associative cache which has in total 4096 bytes of cache memory and each cache line is 128 bytes.