Editing Parallel computing (section)

====Multi-core computing====
{{main|Multi-core processor}}
A multi-core processor is a processor that includes multiple [[Central processing unit|processing units]] (called "cores") on the same chip. This processor differs from a [[superscalar]] processor, which includes multiple [[execution unit]]s and can issue multiple instructions per clock cycle from one instruction stream (thread); in contrast, a multi-core processor can issue multiple instructions per clock cycle from multiple instruction streams. [[IBM]]'s [[Cell (microprocessor)|Cell microprocessor]], designed for use in the [[Sony]] [[PlayStation 3]], is a prominent multi-core processor. Each core in a multi-core processor can potentially be superscalar as well—that is, on every clock cycle, each core can issue multiple instructions from one thread.

[[Simultaneous multithreading]]  (of which Intel's [[Hyper-Threading]] is the best known) was an early form of pseudo-multi-coreism. A processor capable of concurrent multithreading includes multiple execution units in the same processing unit—that is it has a superscalar architecture—and can issue multiple instructions per clock cycle from ''multiple'' threads. [[Temporal multithreading]] on the other hand includes a single execution unit in the same processing unit and can issue one instruction at a time from ''multiple'' threads.