Newsgroups: comp.parallel.pvm
From: dan@graphics.cornell.edu (Daniel Kartch)
Subject: Re: Problems with xpvm
Organization: Program of Computer Graphics -- Cornell University
Date: 30 Jun 1994 21:46:50 GMT
Message-ID: <2uvega$krp@merckx.graphics.cornell.edu>

In article <2uv61d$rls@emory.mathcs.emory.edu>, lu@mathcs.emory.edu (Xiaowu Lu) writes:
|> Hi,
|> I have some medium sized benchmarks (They run for about 20-25 minutes) that work
|> fine with standard PVM, but when I try to use XPVM (I am running on SUN4's), 
|> the system crashes after about 
|> 10 minutes.  The XPVM window dissappears and in the window where I started XPVM I
|> receive the following:
|> 
|> Connecting to pvmd already running... xpvm connected as tid 40003.
|> % libpvm [t40003]: mxfer() EOF on pvmd sock
|> libpvm [t40003]: pvm_nrecv(): Can't contact local daemon
|> libpvm [t40003]: mxfer() EOF on pvmd sock
|> libpvm [t40003]: pvm_nrecv(): Can't contact local daemon
|> libpvm [t40003]: mxfer() EOF on pvmd sock
|> libpvm [t40003]: pvm_nrecv(): Can't contact local daemon
|> libpvm [t40003]: mxfer() EOF on pvmd sock
|> libpvm [t40003]: pvm_send(): Can't contact local daemon
|> libpvm [t40003]: mxfer() EOF on pvmd sock
|> libpvm [t40003]: pvm_recv(): Can't contact local daemon
|> libpvm [t40003]: pvm_upkint(): No current buffer
|> Quitting xpvm - pvmd still running.
|> libpvm [t40003]: mxfer() EOF on pvmd sock
|> libpvm [pid1774]: pvm_exit(): Can't contact local daemon

I've been having the same sort of problem.  I also notice that, although
several minutes of real time pass before it crashes, xpvm shows the total
time as being only about 15 seconds.  It seems like xpvm can't keep up
with the trace information from my process (which sends a LOT of messages)
and after a few minutes the backload gets so huge that it dies.

-- 
+-----------------------------------------------------------------------------+
|      Daniel Kartch                             582 Theory Center Bldg.      |
|      Program of Computer Graphics              Cornell University           |
|      Cornell University                        Ithaca, NY 14853             |
|      dan@graphics.cornell.edu                  (607) 255-6704               |
+-----------------------------------------------------------------------------+

