A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory.[1] A cache is a smaller, faster memory, located closer to a processor core, which stores copies of the data from frequently used main memory locations. Most CPUs have a hierarchy of multiple cache levels (L1, L2, often L3, and rarely even L4), with different instruction-specific and data-specific caches at level 1.[2] The cache memory is typically implemented with static random-access memory (SRAM), in modern CPUs by far the largest part of them by chip area, but SRAM is not always used for all levels (of I- or D-cache), or even any level, sometimes some latter or all levels are implemented with eDRAM.
Other types of caches exist (that are not counted towards the "cache size" of the most important caches mentioned above), such as the translation lookaside buffer (TLB) which is part of the memory management unit (MMU) which most CPUs have.
^Torres, Gabriel (September 12, 2007). "How The Cache Memory Works".
^Su, Chao; Zeng, Qingkai (2021-06-10). Nicopolitidis, Petros (ed.). "Survey of CPU Cache-Based Side-Channel Attacks: Systematic Analysis, Security Models, and Countermeasures". Security and Communication Networks. 2021: 1–15. doi:10.1155/2021/5559552. ISSN 1939-0122.
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are stored in the same memory system and (without the complexity of a CPUcache) must be accessed in turn. The physical separation of instruction and...
it feasible to integrate memory on the same die as the processor. This CPUcache has the advantage of faster access than off-chip memory and increases...
primary storage, and static random-access memory (SRAM) used mainly for CPUcache. Most semiconductor memory is organized into memory cells each storing...
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A CPUcache is a piece of hardware that reduces access time to data in memory by keeping some part of the frequently used data of the main memory in a...
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connected with UltraFusion Interconnect with a total of 20 CPU cores and 96 MB system level cache (SLC). The M1 integrates an Apple designed eight-core (seven...
("spindles"), since using multiple devices allows parallelism Cache space, including CPUcache and MMU cache (translation lookaside buffer) Network throughput Electrical...
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