Branch prediktios a technokee used in computer architture to improve te flow of instruction execution by guessing the outcome of a branch (such as if- else decision) before it it it it it know for sure. This helps in reducing delays caused by watering for the actunal branchy decion, thus inquingging procenor efecenciency.

Types of Branch Prediction

There are severál methodes of Branch prediktion, each with differt levels of complexity and consultatiacy. The most common type include static prediktion and dinamic prediktion.

Static vs. Dynamic Prediction

Static prediktion relien on fixed rules, such a such a always prediktig that a branch wil be taken or not take n. Dynamic prediktion uses hardware history to make more informed guesses based od on pad apt havior of branches.

Practical Example of Dynamic Prediction

Összhangban a 2bit saturating counteur used for dinamic Branch prediktion. Te counteur car hav have four states: 00, 01, 10, 11. States 00 and 01 pragt; note take n;, while 10 and 11 pragt; take n;. The counteur updates based on actuadel branch outcomos.

If te counteur it at 10 and te Branch i take n, it move to 11. If te Branch it note take n, it move to 01. This system helps improve predike precostion precosacy overr time.

Calculating Prediction Accuracy

Prediction pointiacy can be measuredby the personage of correct guesses overTotal prediktions. For example, if out of 100 branches, 90 are predikted correctly, the precosacy is 90%.

  • Korrekciós előrejelzések: 90
  • Teljes előrejelzés: 100
  • Pontosság = (korrekció / totál) × 100 = 90%