What are the two stage of the dynamic branch prediction?
Some dynamic branch prediction techniques are: 1-bit branch prediction technique. 2-bit branch prediction technique. Correlating branch prediction technique.
Why is branch prediction algorithm needed differentiate between static and dynamic techniques?
The static prediction approaches aim is to minimize the average misprediction rate, however recent WCET-aware static prediction [20] approaches gives a better outcome. Dynamic prediction techniques predict a prediction for each branch at run-time to get higher prediction accuracy by considering its execution history.
What will be the penalty if branch predictor predicts wrong result?
When the prediction is right, that is, when the branch is not taken, there is no penalty to be paid. On the other hand, when the prediction is wrong, one bubble is created and the next instruction is fetched from the target address.
What is called static and dynamic branch prediction?
g[2] Explain the difference between static and dynamic branch prediction? Static branch prediction makes fixed prediction of a branch to either taken or not taken; Dynamic branch prediction makes prediction based on previous history situation, by looking at history table.
What is the disadvantage of dynamic branch prediction?
The disadvantage is that the history is diluted by irrelevant information if the different conditional jumps are uncorrelated, and that the history buffer may not include any bits from the same branch if there are many other branches in between. It may use a two-level adaptive predictor.
How does dynamic branch prediction happen?
Dynamic branch prediction uses information about taken or not taken branches gathered at run-time to predict the outcome of a branch.
What is branch prediction in computer architecture?
Branch prediction is a technique used in CPU design that attempts to guess the outcome of a conditional operation and prepare for the most likely result. A digital circuit that performs this operation is known as a branch predictor. It is an important component of modern CPU architectures, such as the x86.
How does branch prediction control hazards?
the idea behind branch prediction is simple: if we can correctly predict whether branches are taken or not, we can reduce the stalls due to control hazards.
Which hazard is caused by branch and jump?
Control hazards: Caused by delay between the fetching of instructions and decisions about changes in control flow (branches and jumps).