CPUcore
A CPU core is the primary processing unit within a central processing unit (CPU) that executes instructions from a program. Each core contains essential components of a processing engine, including the arithmetic logic unit, registers, a control unit, and usually private caches for fast data access. In modern designs, a core handles the fetch–decode–execute–writeback cycle, often using a pipeline to overlap stages and improve throughput. Many cores also include SIMD execution units to process vector data.
In most CPUs, multiple cores reside on a single chip. Multicore designs enable parallel execution of tasks,
Cache and memory hierarchy: cores typically have private L1 data and instruction caches, and often L2 caches.
Power and thermal management: cores consume dynamic power and may adjust frequency in response to workload
Software and performance: the overall performance of a CPU depends on core count, per-core performance, memory