On Mon, Sep 4, 2023 at 12:13 AM Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp> wrote:
William Herrin wrote:
That sounds like normal TCP behavior over a long fat pipe.
No, not at all. First, though you explain slow start, it has nothing to do with long fat pipe. Long fat pipe problem is addressed by window scaling (and SACK).
So, I've actually studied this in real-world conditions and TCP behaves exactly as I described in my previous email for exactly the reasons I explained. If you think it doesn't, you don't know what you're talking about. Window scaling and SACK makes it possible for TCP to grow to consume the entire whole end-to-end pipe when the pipe is at least as large as the originating interface and -empty- of other traffic. Those conditions are rarely found in the real world. Regards, Bill Herrin -- William Herrin bill@herrin.us https://bill.herrin.us/