Hi,
I'm running some simulation on TCP/IP workload. And something unexpected
happened to me. As we know, TCP will play fast retransmit when the sender
receive 3 or more duplicate ACKs asap. However, on my observation, sometimes,
when the sender see the duplicate ACKs, it will not trigger a fast retransmit,
instead, a timeout is set up, which means it will take much longer time to
complete the retransmission. I'm quite confused on this. I tracked the packets,
and I'm sure that the duplicate ACKs successfully arrived at the sender side.
As much as I know, such behavior of TCP is not reasonable. How is TCP
implemented on M5?
Thanks,
Yu
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