Re: very poor TCP performance with 2.2.2

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 25 Feb 1999 21:22:37 +0000 (GMT)

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> The same material is being requested/transferred in both dumps. The server was
> running on host-210 port 3000. Again the client was running on NT4.
>
> I was unable to successfully get strace data for the server. Either strace
> doesn't handle calls from threads properly, or I was using it incorrectly. All
> of the TCP work is being done by threads, not by the main process of the server.

You have to either ask strace to follow forks (and have a current version) or
specifically strace -p the relevant worker threads (which is tricky)

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Next message: Alan Cox: "Re: Linux 2.2.2 TCP delays every 41st small packet by 10-20 ms"
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In reply to: Brendan Cully: "Re: [2.2.2] APM poweroff problem"