Newsgroups: comp.parallel.pvm
From: esanchez@academ01.mty.itesm.mx (Enrique Sanchez Vela)
Subject: Re: Error with PVM 3.3.1
Organization: ITESM, Campus Monterrey
Date: 7 Jul 94 16:21:23 GMT
Message-ID: <esanchez.773598083@campus>

  Prince,

   I don't think this is a PVM problem, I can see two diferent causes.

         a) Network overloaded.
         b) Slave computer overloaded

    To see if is any of above, you can monitor the network trafic (there
are several tools) or try it when traffic is lower or monitor the slave
computer, you can see how loaded is it using "rup hostname" or "uptime" 
(you have to run it local). 

 Hope this helps.

Enrique Sanchez Vela.             e-mail: esanchez@mtecv2.mty.itesm.mx
ITESM - Campus Monterrey          phone (52-8) 328-4089
Tecnologia Computacional          fax   (52-8) 369-2004
AIX/ESA System Administrator (for living)


pkohli@cc.gatech.edu (Prince Kohli) writes:

>I had posted this before as a problem that I had with 3.2.2. However,
>the same error recurs with pvm 3.3.1. Would any one know why this
>happens? Any hint at all would be appreciated.

>Also, the following problem now occurs much later as compared to
>pvm 3.2.2, but it does occur.

>----

>I have an application that runs on top of pvm 3.2.2 (3.3.1 now). The problem
>is that at random times, i.e., sometimes very soon after the program
>starts and sometimes much later, the host console will give this error:

>netoutput() timed out sending to <machine_name> after 23, 194.24140
>hd_dump() ref 1 t100000 n <machine_name> ar "SUN4" lo ""
>sa 130.207.114.58:3211 mtu 4096 f 0x0 e 0 txq 2
>tx 65537 rx 0 rtt 0.003648

>The 130.207.114.58 is the address of <machine_name>.

>After this, though the pvm daemon is still running there, the master host
>thinks it is dead and removes it from the config, and all later packets
>from it are marked bogus packets. And all this of course screws up my
>application.

>----

>Thanks in advance for any help,

>cheers,

>-Prince

--
Enrique Sanchez Vela.             e-mail: esanchez@mtecv2.mty.itesm.mx
ITESM - Campus Monterrey          phone (52-8) 328-4089
Tecnologia Computacional          fax   (52-8) 369-2004
AIX/ESA System Administrator

