L3välimuisti

L3välimuisti, also known as L3 cache, is a type of memory used in computer processors. It serves as a buffer between the CPU cores and the main RAM. Unlike L1 and L2 caches which are typically dedicated to individual processor cores, L3 cache is often shared among all cores on a single processor die. This shared nature allows multiple cores to access and exchange data more efficiently, reducing latency and improving overall system performance, especially in multi-threaded applications. The size of L3 cache is generally larger than L1 and L2 caches, providing a larger pool of frequently accessed data to be stored closer to the CPU. When the CPU needs data, it first checks the L1 cache, then L2, and finally L3. If the data is not found in any of the caches, it must be retrieved from the much slower main memory. The effectiveness of L3 cache is dependent on factors such as its size, speed, and how well it is utilized by the processor's architecture and the software being run.