Messages in this thread | | | Date | Fri, 4 Feb 2000 09:29:47 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | "Different" interactive performance. |
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Linux 2.3.41 seems to have a new characteristic which makes interactive performance poor.
A telnet session with a host in my office, connected through a private hub, shows a noticeable delay in character echo when interacting with the host.
Executing `vi` shows the delay to be so bad that escape-sequences time-out if, for instance it's in `insert` mode, and I use the arrow keys.
Benchmarks of streaming data look fine. It's the character I/O that has suffered miserably. I haven't got the time (need a work-break) to check tcpdump's output, but perhaps somebody else can experiment and see what's going on.
A preminary check seems to indicate that the network is okay. It looks as though there has been some kind of delay added when using virtual terminals (perhaps buffering has changed). I guess this because telnet to the echo port shows no visible delay. It's only when an interactive session is established, which use virtual terminals, that the delay becomes obvious.
Cheers, Dick Johnson
Penguin : Linux version 2.3.41 on an i686 machine (800.63 BogoMips).
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