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- Path: sparky!uunet!zephyr.ens.tek.com!uw-beaver!cornell!ken
- From: ken@cs.cornell.edu (Ken Birman)
- Newsgroups: comp.sys.isis
- Subject: Re: ISIS 3.0.5 & Round trip time (Bug ?)
- Message-ID: <1992Jul21.154415.14996@cs.cornell.edu>
- Date: 21 Jul 92 15:44:15 GMT
- References: <1992Jul21.135255.28380@dxcern.cern.ch>
- Distribution: comp
- Organization: Cornell Univ. CS Dept, Ithaca NY 14853
- Lines: 21
-
- In article <1992Jul21.135255.28380@dxcern.cern.ch> fabien@sun2.cern.ch (Fabien Collin) writes:
- > Between 1 and 14624, the time varies linearly from 6 ms to 55 ms.
- > Suddenly, between 14624 and 14625, it takes 0.5 seconds more
- > to do the round trip. The same phenomenon is repeated each time
- > you add 14800 bytes.
- >
- > I suppose the discontinuity is due to the size of a buffer.
- > But half a second each 14800 bytes seems to be enormous to me.
- > Is it a bug ?
- > If it is, is it fixed in 3.0.6 ?
-
- Yes, it is a bug -- a problem in our flow control code, which got
- confused, fixed its confused state after a half-second timeout, and
- repeated this if the pattern causing the problem recurrs.
-
- And, yes, we fixed it in V3.0.6/V2.2.6
-
- --
- Kenneth P. Birman E-mail: ken@cs.cornell.edu
- 4105 Upson Hall, Dept. of Computer Science TEL: 607 255-9199 (office)
- Cornell University Ithaca, NY 14853 (USA) FAX: 607 255-4428
-