What is a cache reference?

Processor reference that are found in the cache are called cache hits. References not found in the cache are called cache misses. On a cache miss, the cache control mechanism must fetch the missing data from memory and place it in the cache. Usually the cache fetches a spatial locality called the line from memory.

How does L1 and L2 cache work?

L1 and L2 are the first and second cache in the hierarchy of cache levels.

1. L1 has a smaller memory capacity than L2.
2. Also, L1 can be accessed faster than L2.
3. L2 is accessed only if the requested data in not found in L1.**
4. L1 is usually in-built to the chip, while L2 is soldered on the motherboard very close to the chip.

How do I know if I have L1 and L2 cache?

Right-click on the Start button and click on Task Manager. 2. On the Task Manager screen, click on the Performance tab > click on CPU in the left pane. In the right-pane, you will see L1, L2 and L3 Cache sizes listed under “Virtualization” section.

What is main memory reference?

Quick Reference The storage that is closely associated with the processor of a computer system and from which the program instruction and data can be directly retrieved and to which the resulting data is written prior to transfer to backing store or output device.

What is processor cache size?

The “size” of the cache is the amount of main memory data it can hold. This size can be calculated as the number of bytes stored in each data block times the number of blocks stored in the cache.

What happen if a memory reference caused in a cache miss?

When a cache miss occurs, the system or application proceeds to locate the data in the underlying data store, which increases the duration of the request. Typically, the system may write the data to the cache, again increasing the latency, though that latency is offset by the cache hits on other data.

How many memory reference are required?

2 Answers. Total 3 memory references .