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Recent questions tagged stall

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GATE CSE 2022 | Question: 51
A processor $\text{X}_{1}$ operating at $2 \; \text{GHz}$ has a standard $5-$stage $\text{RISC}$ ... $\text{X}_{1}$ in executing $\text{P}$ is _______________.
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#pipeline #self doubt
Consider a 5—stage pipeline processor used to execute 200 number of instructions and among those 100 instructions cause 3 stall cycles each. What is the total cycles required for these operation if CPI is not equal to one.
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PIPELINING.
How to find number of stall cycles and branch penalty & CPI in a branched instruction pipelining?
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#Pipeliningdoubt
What is the concept of branch penalty , stall cycle and branch instructions and what are the formulas to get those ?? Someone please guide me..i am really facing much difficulty in these concepts while solving prev yr gate questions.
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How many stall cycles are caused due to each incorrect branch prediction?
The title says it all: How many stall cycles are caused due to each incorrect branch prediction?Additional details you might need:Branch is executed in execution ... love to know what happens when branch is executed in decode stage too)
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Average memory stall
Consider a CPU contains 2000 instructions, there are 80 misses in L1 cache and 40 misses in the L2 cache. Assume miss penalty from the L2 cache ... per instruction is ________. Can you please suggest the method to attempt such questions.
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ME Test Series
Consider a CPU containing 2000 instructions, there are 80 misses In the $L_1$ cache and 40 misses In the $L_2$ cache. Assume the miss penalty from ... 1.8 memory references per instruction, then average stall per instruction Is _________.
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pipeline
consider a5 stage pipeline processor, 20% load instructions, 25% branches, 20% stores, 20% of all instructions are data dependent on instructions in front of them and branches are taken 75%of time. what would be the expected cpi?
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Clock per instruction
What is the difference between Effective CPI and Average CPI ?A program is run on 40 MHZ with instruction mix and corresponding clock cycle count.Determine : * Effective CPI * ... Control Transfer 2 8000
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Branch prediction in pipelining part of syllabhs?
Is branch prediction in pipelining im Co and architecture part of gate syllabus?
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Testseries
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Pipeline Doubt
Its a snapshot from hamacher.According to me there should be stall of 2 cycles why 3 ??Because after Write stage the data will be available in register file so why extra stall in 6th clock cycle ?
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COA -INSTRUCTION PIPELINE
Consider a 4 stage pipeline:fetch-IF(2cycle), decode& read -ID(1 cycle) execute-Ex(4 cycle for multiply and 7 cycle for divide ,1 cycle for all other ... 1 cycle in execute stage . How many cycle does it take to execute program A?
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Pipeline
A computer with a 5 stage pipeline deals with conditional branches by stalling for the next 3 cycle after hitting one. how much does stalling hurt the performance is 20% of all instructions are conditional branches.
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Branch Stall
What does the Following line states:- Branch instruction aren't overlapped i.e. the instruction after the branch is not fetched till the branch instruction is executed. ... fetched will be in stage 4. Hence total 4 Stalls isn't it?
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Pipeline Stall
Whenever Question is given on pipeline with branching i am confused to calculate that how many stalls will be there in the pipeline according to the constraint depicted in ... If there are N Cycles then N-1 Stalls will be there"?Please Help
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Pipeline
Meaning of stall per cycle. Explain briefly
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Pipeline Stall
I am very Confused in determining the number of stalls in a given execution. Please determine how to find out the number of stalls in the execution of the pipeline.Like In this example calculate the ... 1 1 1
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Pipeline Stalls
I am very Confused to how to calculate Delay SLOTS in a given Pipeline.Can anybody explain the technique for finding the number of delay slots and Stalls in A ... WSo 3 stalls right? what about Pipeline stalls??Plz explain where i am wrong?
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Average Number of stalls
Consider a CPU contains 2000 instructions, there are 80 misses in the L1 cache and 40 misses in the L2 cache. Assume miss penalty from the L2 cache to memory is 200 clock ... hit in L1 cache} + 0.05(30 + 0.5 * 200)6.5 stalls/instruction.
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Avg stall cycles per instruction
Suppose that in $500$ memory references there are $50$ misses in the first level cache and $20$ misses in second level cache. Assume miss penalty ... $2.5$ memory references per instruction. How many average stall cycle per instruction?
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COA:- Average stalls per instruction
What will be L1 miss rate? I think it is 80/3600 ,but then answer did not match. But if i take 80/2000,then it matches with the given answer
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Number of stall cycles in case of branch misprediction
Consider that branch outcomes are determined in the EX stage and the pipeline uses some prediction mechanism. If the misprediction happens, how many stall cycles gets introduced per mispredicted branch instruction?
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COA pipeline doubt
I) In a 4 stage pipeline processor, if each stage takes 4 cycles then what is CPI in case of successfull pipeline???II) In a 4 stage pipeline ... 3rd stage then what should be branch pelanty??(In both the implementations mentioned above)
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Pipeline
Assume that execution of 200 instructions on a 6 staged pipeline where the target address is available at 4th stage.Let X be the probability of an instruction not being branch. The value of X such that speedup is atleast 5 is?
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CO Cache stall cycles
Suppose that in 500 memory references there are 50 misses in the first level cache and 20 misses in the second level cache.Assume miss penalty ... memory references per instruction.How many average stall cycles per instructions are there?
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Number of stall cycles for given speed up
Anyone? I know my answer is wrong.
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Stall Cycles-Without Forwarding
anyone elaborate the reason for each stall cycles.
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stall
lw $R2,100($R5)sw $R2,200($R6)............ with out any bypass paths how many cycles does the sw instruction.. need to stall for? 5 stage pipeline
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