Abstracted Version of Single Core

1. Fetch/decodes instruction
2. Executes operation/computation
3. stores value in the Register

Simply think of a computer as: a machine that loads data (from memory) and do some math, then save that state.

idea 1. Superscalar processor

Processor automatically finds independent instructions in an instruction sequence and can execute them in parallel on multiple execution units. (done on the HW side)

Superscalar processor achieves parallelism by automatic division “within” a core.

Pre multi-core era processor: Make single instruction faster (= reduce latency of single instruction)

as transistors increase, use them for

• larger cache
• smarter ooo logic
• smarter branch predictor
• etc.