How many optimization techniques are considered for optimizing the cache memory performance?

Optimizing Cache Performance In the list below, Reference 2. suggests the following as five categories of activity for optimizing cache performance: Reducing the hit time – Small and simple first-level caches and way-prediction. Both techniques also generally decrease power consumption.

What are the three categories of basic cache optimizations?

They are:

• Larger block size.
• Larger cache size.
• Higher associativity.
• Way prediction and pseudo associativity, and.
• Compiler optimizations.

How does cache improve the CPU instruction cycle?

For optimal system performance, a processor needs to be busy doing computational work, not waiting for the next instruction or data to be fetched from memory. A cache read miss from an instruction cache generally causes the most delay because the processor has to wait until the instruction is fetched from main memory.

How does instruction cache work?

The instruction and data caches have a subtle difference: instructions are only fetched (read) from memory, but data can be read from or written to memory. For the instruction cache, blocks are copied from main memory to the cache.

How do I increase my cache hit rate?

To increase your cache hit ratio, you can configure your origin to add a Cache-Control max-age directive to your objects, and specify the longest practical value for max-age .

How do I increase my cache memory?

With newer systems, the most effective way to increase cache memory is to replace the current CPU with one that has a higher capacity. This will automatically make it possible to increase the size of the cache memory, as well as enhance the processor speed and overall performance of the system.

How cache is used in cache organization?

Cache memory is used to reduce the average time to access data from the Main memory. The cache is a smaller and faster memory which stores copies of the data from frequently used main memory locations. There are various different independent caches in a CPU, which store instructions and data.

How cache miss rate can be reduced?

Reducing Miss Rate Cache misses can be reduced by changing capacity, block size, and/or associativity. The first request to a cache block is called a compulsory miss, because the block must be read from memory regardless of the cache design.

What is the biggest and slowest cache?

The cache can only load and store memory in sizes a multiple of a cache line. Caches have their own hierarchy, commonly termed L1, L2 and L3. L1 cache is the fastest and smallest; L2 is bigger and slower, and L3 more so.

What are the three types of cache misses?

There are three basic types of cache misses known as the 3Cs and some other less popular cache misses.

• Compulsory misses.
• Conflict misses.
• Capacity misses.
• Coherence misses.
• Coverage misses.
• System-related misses.

How are cache optimizations used in computer architecture?

The compiler can profile code, identify conflicting sequences and do the reorganization accordingly. Reordering the instructions reduced misses by 50% for a 2-KB direct-mapped instruction cache with 4-byte blocks, and by 75% in an 8-KB cache. Another code optimization aims for better efficiency from long cache blocks.

How to improve the performance of the cache?

•Capacity: – Cache cannot contain all blocks access by the program –Solution: increase cache size •Coherence (Invalidation): other process (e.g., I/O) updates memory – We will cover it later on. Memory Hierarchy Performance

How are cache optimizations used to reduce Amat?

There are different methods that can be used to reduce the AMAT. There are about eighteen different cache optimizations that are organized into 4 categories as follows: Ø Reducing the miss penalty: § Multilevel caches, critical word first, giving priority to read misses over write misses, merging write buffer entries, and victim caches

How does the compiler reduce misses in Cache?

The compiler can easily reorganize the code, without affecting the correctness of the program. The compiler can profile code, identify conflicting sequences and do the reorganization accordingly. Reordering the instructions reduced misses by 50% for a 2-KB direct-mapped instruction cache with 4-byte blocks, and by 75% in an 8-KB cache.