Comments (2)
Hi
- If you would like to print the time when a packet is dequeued, please make sure that the print statement is inside the
if
condition within the above mentioned for loop. Thisif
is true when a packet is dequeued from the internal queue. The for loop runs overs over all the internal queues (at most one round) until a packet is available to dequeue. Sim time does not advance within the for loop. But it advances if a packet is found and when we break from the for loop. - GenQueueDisc is per port. So if you place a print statement in GenQueueDisc, print will be triggered due to events on all the ports. This could be a possible reason for packets dequeued at the same time.
- Point to point net device triggers the Dequeue function. I think here is where advancing the time appears in the TransmitStart function if I am not wrong.
Hope it clears your question.
from ns3-datacenter.
thank you. i put the print statements in the if:
if ((item = GetQueueDiscClass (dequeueIndex)->GetQueueDisc ()->Dequeue ()) != 0)
the problem is even when i define an array per priority in GenQueueDisc class, and saving current time in it, it still has duplicate values (different GetQueueDisc will have their own array and it does not matter if there are duplicates across them). this way time mark should be unique for priority in that port and i did not expect to see duplicate vals.
from ns3-datacenter.
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from ns3-datacenter.