Newsgroups: comp.parallel.pvm
From: Ingo Reise <reise@informatik.uni-wuerzburg.de>
Subject: Communication problems between ALPHA and ALPHAMP
Organization: University of Wuerzburg, Germany
Date: 29 Aug 1995 12:14:50 GMT
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Message-ID: <41v0bq$sj6@winx03.informatik.uni-wuerzburg.de>

Hello!

We've got a problem sending pvm-messages from our ALPHA-cluster to our ALPHAMP
and the other way round.

Out test-program works fine on the ALPHAMP and between the ALPHAs, but any
packet bigger than 3 kilobyte sent from one architecture to the other results
in:

[t80040000] (time) [t80001] libpvm [t80001]: pvm_upkbyte(): End of buffer
[t80040000] (time) [t80001] slave cork: pvm_upkbyte failed (7)
(The second message is my one,
 all other used pvm-calls are ok.)

Sending packets up to 3 kilobytes makes no errors and the packet is received
complete and correct (tested).

So only the transmission of packets bigger than 3 kilobytes and from one
architecture to the other results in errors.

We don't know, if this is a pvm-error or an error in out network-configuration,
but we don't know where to adjust this 4 kilobyte-value to a bigger one.

Any helpful hints are appreciated,
Ingo

-- 


                     __o           
                     \<,           
___________________()/ ()______________________________________________________
Ingo Reise                                      
Robert-Kirchhoff-Strasse 55    Lehrstuhl fuer Informatik II
D-97076 Wuerzburg              Universitaet Wuerzburg
Tel. (+49 / 0) 931/273597      e-mail: reise@informatik.uni-wuerzburg.de


