Newsgroups: comp.parallel.pvm
From: strauss@dagoba.priconet.de (Frank Strauss)
Subject: Re: futur of PVM discussion...
Organization: Private Site at Priconet, Braunschweig, Germany
Date: Wed, 1 Jun 1994 20:46:11 GMT
Message-ID: <1994Jun1.204611.361@dagoba.priconet.de>

crispin@csd.uwo.ca (Crispin Cowan) writes:

>In article <1994May27.090248.3475@dagoba.priconet.de>,
>Frank Strauss <strauss@dagoba.priconet.de> wrote:
>>[laments PVM's performance]
>>I think, the problem is that all communication gets put through the
>>daemons, which of course makes the PVM more robust and easy to administrate.
>To avoid routing through the daemons, use pvm_setopt to enable "direct
>routing" of the messages.  This sets up a direct TCP connection between
>communicating tasks.  Such a configuration is not the default, because
>it requires an open file descriptor, and many UNIX systems impose a
>limit on the number of file descriptors.  According to the
>documentation, using direct routing can give a factor of 2 performance
>improvement.

I see. I'll try it the next days. (I should not have printed the PVM
documentation draft, I only know about the library functions mentioned
in it and never get the idea to look for newer man pages or change logs,
by now. :-) 

I think, it will make me much happier with PVM. Thank you.

-- 
Frank Strauss, TU Braunschweig                  Uni:    strauss@ibr.cs.tu-bs.de
Buergerstr. 13, 38118 BS, (0531)-503873        Home: strauss@dagoba.priconet.de

