Does each processor core have its own cache?

Every core of a multi-core processor has a dedicated L1 cache and is usually not shared between the cores. The L2 cache, and higher-level caches, may be shared between the cores.

What are the causes of cache coherence problem?

The Cache Coherence Problem For example, the cache and the main memory may have inconsistent copies of the same object. As multiple processors operate in parallel, and independently multiple caches may possess different copies of the same memory block, this creates cache coherence problem.

What are the common mechanisms of ensuring coherency?

The two most common mechanisms of ensuring coherency are snooping and directory-based, each having their own benefits and drawbacks. Snooping based protocols tend to be faster, if enough bandwidth is available, since all transactions are a request/response seen by all processors.

What is 8mb L3 cache?

The 8 MB you are talking about, is the amount of L3 cache found in some high level CPUs like i7 and some xeons. The optimal amount of cache is obtained by a calculus between the maximum amount of RAM for the system, the number of physical cores and the CPU cycles.

When a computer processor does not get a data item that it requires in the cache it is known as?

When a computer processor does not gets data item that it requires in cache, then the problem is known as cache miss. The problem of cache miss is the state when the data requested for processing cannot be found in the system specifically in the cache memory.

What is cache coherence list few possible measures that can ensure cache coherence?

The cache coherence protocols keep track of accesses within a hardware transaction….Cache Coherence

• Simulators.
• Coherency.
• Memory Access.
• Memory Block.
• Multiprocessor System.
• Processor Core.