What are the challenges of branch prediction in computer architecture?

What are the challenges of branch prediction in computer architecture?

Branch prediction is crucial for improving CPU performance, but it faces several challenges such as accuracy, complexity, and resource consumption.

Can you explain why accuracy is a challenge?

Accuracy is a challenge because mispredictions can lead to pipeline stalls, wasting CPU cycles and reducing overall performance.

What factors affect the accuracy of branch prediction?

Factors include the type of branch instructions, the history of previous branches, and the prediction algorithms used.

How do modern processors handle these challenges?

Modern processors use advanced techniques like dynamic branch prediction, which adapts based on runtime behavior to improve accuracy.

Are there any trade-offs involved in improving branch prediction?

Yes, improving branch prediction often involves trade-offs between accuracy, complexity, and power consumption.