What is cache line?

The block of memory that is transferred to a memory cache. The cache line is generally fixed in size, typically ranging from 16 to 256 bytes. The effectiveness of the line size depends on the application, and cache circuits may be configurable to a different line size by the system designer.

What is cache hit in computer architecture?

A cache hit describes the situation where your site’s content is successfully served from the cache. The tags are searched in the memory rapidly, and when the data is found and read, it’s considered as a cache hit.

What is cache false sharing?

Avoid False Sharing. In the presence of multiple threads that share data, there are a number of sharing effects that may affect performance. One such sharing pattern is false sharing. It arises if at least two threads are both using unrelated data placed close enough to end up in the same cache line.

What is cache memory with example?

Memory cache – When an application is running, it may cache certain data in the system memory, or RAM. For example, if you are working on a video project, the video editor may load specific video clips and audio tracks from the hard drive into RAM.

What is cache line boundary?

“Cache line splits” are the first scenario: You are loading or write a data elements where some part of the data is one cache line and the remaining part is in the adjacent cache line. On Intel architecture, cache lines are 64B. Cache lines therefore start at a multiple of 64.

Why is cache memory important?

Cache memory is important because it improves the efficiency of data retrieval. It stores program instructions and data that are used repeatedly in the operation of programs or information that the CPU is likely to need next.

What do mean by cache hit and cache miss?

A cache miss, generally, is when something is looked up in the cache and is not found – the cache did not contain the item being looked up. The cache hit is when you look something up in a cache and it was storing the item and is able to satisfy the query.

What is cache sharing?

Cache sharing allows each cache to share its contents with the other caches and avoid duplicate caching. It is common for a point of presence on the web to have more traffic than a single server can handle. Cache sharing solves these problems by allowing each cache to share its contents with the other caches.