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- Newsgroups: comp.os.os2.networking
- Path: sparky!uunet!newsflash.concordia.ca!mizar.cc.umanitoba.ca!news!buhr
- From: buhr@umanitoba.ca (Kevin Andrew Buhr)
- Subject: Re: Why does telnet consume so much CPU time (IBM TCP/IP)
- In-Reply-To: hwb@machnix.mathematik.uni-stuttgart.de's message of Fri, 11 Dec 1992 16:27:22 GMT
- Message-ID: <BUHR.92Dec16174033@ccu.umanitoba.ca>
- Sender: news@ccu.umanitoba.ca
- Nntp-Posting-Host: ccu.umanitoba.ca
- Organization: University of Manitoba, Canada
- References: <HWB.92Dec11172722@machnix.mathematik.uni-stuttgart.de>
- Distribution: comp
- Date: Wed, 16 Dec 1992 23:40:33 GMT
- Lines: 20
-
- In article <HWB.92Dec11172722@machnix.mathematik.uni-stuttgart.de>
- hwb@machnix.mathematik.uni-stuttgart.de (Harald Boegeholz) writes:
-
- > I just noticed that telnet (from IBM TCP/IP) consumes CPU time even if
- > no key is pressed and no screen updates are necessary. Could it really
- > be that they do busy waiting on network input or the keyboard?
-
- There's a bug in the original TCP/IP 1.2.1 "TELNET.EXE". The similar
- program "VT220.EXE"--which doesn't provide "line mode"--is also
- included with the TCP/IP base product and doesn't suffer from the same
- problem. If you don't need "line mode", use "VT220", and your CPU
- utilitization should be much more normal.
-
- If you do need to run "TELNET.EXE", apply the CSD for the TCP/IP base
- product available via anonymous FTP from "ftp-os2.nmsu.edu:
- /pub/os2/2.0/patches/". This CSD purportedly fixed the problem. When
- you get a chance, you should probably apply this CSD anyway; it fixes
- a number of other bugs.
-
- Kevin <buhr@ccu.UManitoba.CA>
-