What is prediction computer architecture?
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What is prediction computer architecture?
In computer science, predication is an architectural feature that provides an alternative to conditional transfer of control, as implemented by conditional branch machine instructions.
What is dynamic branch prediction?
In the case of dynamic branch prediction, the hardware measures the actual branch behavior by recording the recent history of each branch, assumes that the future behavior will continue the same way and make predictions.
What is the difference between static branch prediction and dynamic branch prediction why dynamic branch prediction is necessary?
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 dynamic scheduling in computer architecture?
Dynamic Scheduling is a technique in which the hardware rearranges the instruction execution to reduce the stalls, while maintaining data flow and exception behavior. The advantages of dynamic scheduling are: • It handles cases when dependences are unknown at compile time.
What is PHT in computer architecture?
10. Branch History Table (BHT) ▪ Small memory to store the history of each branch. • Sometimes called Pattern History Table (PHT)
What are the two types of branch prediction techniques available?
Branch prediction schemes are of two types: static branch schemes and dynamic branch schemes. branch scheme (hardware techniques) is based on the hardware and it assembles the information during the run-time of the program.
What is pipeline computer architecture?
With pipelining, the computer architecture allows the next instructions to be fetched while the processor is performing arithmetic operations, holding them in a buffer close to the processor until each instruction operation can be performed. The staging of instruction fetching is continuous.
What is scoreboard computer architecture?
Scoreboarding is a centralized method, first used in the CDC 6600 computer, for dynamically scheduling instructions so that they can execute out of order when there are no conflicts and the hardware is available.
What are the 4 stages of pipelining?
To the right is a generic pipeline with four stages: fetch, decode, execute and write-back.
What is a disadvantage of a dynamic branch prediction method like history table?
Low branch prediction accuracy (no better than chance). What is a disadvantage of a dynamic branch prediction method, like history table? Increased performance.
What is branch computer architecture?
A branch is an instruction in a computer program that can cause a computer to begin executing a different instruction sequence and thus deviate from its default behavior of executing instructions in order.
How is dynamic instruction scheduling is done by Tomasulo algorithm in modern processors?
Tomasulo’s algorithm implements register renaming through the use of what are called reservation stations. Reservation stations are buffers which fetch and store instruction operands as soon as they’re available.
