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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.
Cache hierarchy, or multi-level cache, is a memory architecture that uses a hierarchy of memory stores based on varying access speeds to cache data. Highly requested data is cached in high-speed access memory stores, allowing swifter access by central processing unit (CPU) cores.
The read bandwidth when a single Lion Cove core accesses the L3 cache has regressed from 16 bytes per cycle with Redwood Cove to 10 bytes per cycle for Lion Cove. Despite this lower bandwidth in reading and writing data, the latency of Lion Cove accessing L3 data has been reduced from 75-cycles to 51-cycles in Lunar Lake. [ 8 ]
A victim cache is a small, typically fully associative cache placed in the refill path of a CPU cache. It stores all the blocks evicted from that level of cache and was originally proposed in 1990. In modern architectures, this function is typically performed by Level 3 or Level 4 caches.
Cache; L1 cache: 64 KB per core (32 KB instructions + 32 KB data) L2 cache: 256 KB per core: L3 cache: 2–45 MB (shared) L4 cache: 128 MB of eDRAM (Iris Pro models only) Architecture and classification; Technology node: 22 nm : Microarchitecture: Haswell: Instruction set: x86-16, IA-32, x86-64: Extensions
Cache prefetching can be accomplished either by hardware or by software. [3]Hardware based prefetching is typically accomplished by having a dedicated hardware mechanism in the processor that watches the stream of instructions or data being requested by the executing program, recognizes the next few elements that the program might need based on this stream and prefetches into the processor's ...
VLIW, Elbrus (proprietary, closed) version 4, 64-bit Tech. node 28 nm, TSMC process Clock rate: 1.3 GHz Cache L1 caches per core: 128 KB for instructions (1 port) + 64 KB for data (4 ports) L2 cache per core: 512 KB, 1 port; L3 cache, shared across cores: 16 MB, 4 banks 1 port each; Integrated memory controller DDR3-1600, 4 72-bit channels ...
A CPU cache [71] 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. A cache is a smaller, faster memory, closer to a processor core, which stores copies of the data from frequently used main memory locations.