Podcast
Questions and Answers
What is the primary function of the ID stage in the pipeline?
What is the primary function of the ID stage in the pipeline?
- Execute the instruction in the Execution Unit
- Decode the instruction and generate control signals (correct)
- Write back results to registers
- Fetch instruction from memory
What is the cause of pipeline stalling in the given pipeline diagram?
What is the cause of pipeline stalling in the given pipeline diagram?
- Clock cycle mismatches between stages
- Resource contention in the Memory Access stage (correct)
- Dependent instructions in the execution unit
- Instruction decoding errors in the ID stage
Which stage is responsible for loading data from memory?
Which stage is responsible for loading data from memory?
- Execution Unit (EX) stage
- Instruction Fetch (IF) stage
- Memory Access (MEM) stage (correct)
- Decode (ID) stage
What is the sequence of stages an instruction goes through in the pipeline?
What is the sequence of stages an instruction goes through in the pipeline?
Which stage writes back results to registers?
Which stage writes back results to registers?
What is the primary function of the Execution Unit (EX) stage?
What is the primary function of the Execution Unit (EX) stage?
What happens when the instruction in the Instruction Fetch (IF) stage is not available in the cache?
What happens when the instruction in the Instruction Fetch (IF) stage is not available in the cache?
What is the primary function of the Decode Stage (ID)?
What is the primary function of the Decode Stage (ID)?
What occurs when there is a dependency between two instructions in the pipeline?
What occurs when there is a dependency between two instructions in the pipeline?
What is the purpose of the Memory Access pattern?
What is the purpose of the Memory Access pattern?
What happens when an instruction is sent to the Execution Unit (EX)?
What happens when an instruction is sent to the Execution Unit (EX)?
What is the purpose of the Write Back (WB) stage?
What is the purpose of the Write Back (WB) stage?
What occurs when the pipeline is stalled due to a cache miss?
What occurs when the pipeline is stalled due to a cache miss?
What is the primary function of the Instruction Fetch (IF) stage?
What is the primary function of the Instruction Fetch (IF) stage?
What is the primary function of the Instruction Fetch (IF) stage in the pipeline?
What is the primary function of the Instruction Fetch (IF) stage in the pipeline?
What happens during the Decode (ID) stage?
What happens during the Decode (ID) stage?
What is the primary purpose of the Execution (EX) stage?
What is the primary purpose of the Execution (EX) stage?
What type of stall occurs when the pipeline needs to wait for memory access?
What type of stall occurs when the pipeline needs to wait for memory access?
What is the purpose of the Memory Access (MEM) stage?
What is the purpose of the Memory Access (MEM) stage?
What happens during the Write Back (WB) stage?
What happens during the Write Back (WB) stage?
What is the instruction ordering constraint shown in the diagram?
What is the instruction ordering constraint shown in the diagram?
What is the purpose of the register 'Im' in the diagram?
What is the purpose of the register 'Im' in the diagram?
Study Notes
Instruction Execution Pipeline
- The pipeline consists of 5 stages: IF (Instruction Fetch), ID (Instruction Decode), EX (Execution), MEM (Memory Access), and WB (Write Back)
- Each stage takes one clock cycle to complete
Instruction Order
- Instructions are executed in a specific order: Inst.#1, Inst.#2, Inst.#3, etc.
- Each instruction goes through the 5 stages of the pipeline
Load Instructions
- Load instructions have a separate pipeline: Load, Mem, Reg, L, Mem, Reg
- Load instructions also take 5 clock cycles to complete
Instruction Timing
- The time taken for an instruction to complete is measured in clock cycles
- Each stage of the pipeline takes one clock cycle
- The total time taken for an instruction to complete depends on the number of stages it has to go through
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Description
This quiz covers the concepts of clock cycles, instruction fetch, decode, execute, and memory access stages in computer architecture. Test your understanding of the different stages involved in processing instructions.
