These are Multi-Core Computer Architecture Nptel Week 11 Answers
Q1. In sidebuffered deflection routers, what is the role of side buffers? To eliminate link contention To store deflected flits temporarily To store flits that are golden To reduce port conflict
Answer: To store deflected flits temporarily
Q2. What is hot-potato routing? Routing based on packet age Routing based on deflection frequency Routing based on any available output port Routing based on network congestion
Answer: Routing based on any available output port
These are Multi-Core Computer Architecture Nptel Week 11 Answers
Q3. At any given point in time, the maximum number of silver flits in a 5×5 mesh NoC realized using MinBD routers is __. 1 5 25 10
Answer: 25
Q4. Which of the following is TRUE with respect to buffer-less deflection router CHIPPER? One packet per router is identified as golden and golden packets are never deflected. Ejection stage is kept after the inject stage in the router pipeline. Port allocation is done using a parallel PDN logic. Priority of flits are identified after a total sorting of flits based on age.
Answer: Port allocation is done using a parallel PDN logic.
These are Multi-Core Computer Architecture Nptel Week 11 Answers
Q5. Which of the following is TRUE with respect to deflection router MinBD? All the flits assigned with non-productive ports by PDN are forwarded to side buffer. At most two flits can be ejected per router per cycle. In the router pipeline, the buffer inject unit is kept after the buffer eject unit. Once a flit becomes silver, it is no longer deflected till it reaches its destination
Answer: At most two flits can be ejected per router per cycle.
Q6. Which of the following is FALSE? CHIPPER router uses golden packet scheme for flit prioritization BLESS uses sequential port allocation logic MinBD uses quadrant routing algorithm DeBAR has single ejection port.
Answer: MinBD uses quadrant routing algorithm
Q7. Which one of the following uses quadrant routing technqiue? SLIDER CHIPPER DeBAR MinBD
Answer: DeBAR
These are Multi-Core Computer Architecture Nptel Week 11 Answers
Q8. Which one of the following uses restrictive and non-restrictive injection? SLIDER CHIPPER DeBAR MinBD
Answer: SLIDER
Q9. Consider a 4×4 NoC with CHIPPER routers. Preferred port is chosen by XY routing. Consider 4 packets that reach router 6 (routers are numberred from 0 to 15). The details of the packets (Packet number, Golden, Input Port, Destination) <P1, Yes, S, 10>, <P2, No, W, 14>, <P3, No, E, 9> and <P4, No, N, 6>. Tie between two non-golden flits are resolved using packet number. Higher the packet number, higher the priority. How many packets get productive output port in PDN?
Answer: 2
These are Multi-Core Computer Architecture Nptel Week 11 Answers
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