Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!snorkelwacker!ira.uka.de!ifistg!cs3!homeis
From: homeis@cs3.ifistg.uucp
Newsgroups: comp.sys.transputer
Subject: Re: Re: Helios (reset problems and other experiences)
Message-ID: <2306@ifi.informatik.uni-stuttgart.de>
Date: 2 May 90 15:34:16 GMT
Sender: news@ifistg.uucp
Organization: IPVR, Univ. Stuttgart, W-Germany
Lines: 37
Reply-To:


On 27 Apr 90  Tommy Leemann, Zurich, Switzerland, said:

>>* If I connect my transputers to a 2-D-grid ...
>.... I guess your resource map doesn't correspond
>to your actual hardware configuration.

I am quite sure that my resource map is ok. May be the reason is my small
memory (250 KB per node).

>>* Helios crashes a lot of times ...
>We had similar crash problems. The PC-server probably doesn't have enough
>memory and doesn't care to tell you about. Try to give as much as possible
>DOS-memory to the PC-server. With version 1.1A we don't have that problem.
>Here the server doesn't start with too little memory!

My server has 640 KB PC memory. And server crashes are not the only crashes.

>>* It is impossible to redirect the stderr, so we could never save ...
>We havn't had such problems at all. In our makefile we always redirect the
>error output into files.

Could You please post an example?

>>* After a while one ore more transputers die without a recognizable ...
>No idea. Couldn't this be the result of a wild program damaging Helios
>resources on that transputer?

This happens even if *no* user programs are running.

Thank You for Your Reply.

--------------
Dieter Homeister, Universitaet Stuttgart,
Institut fuer parallele und verteilte Hoechstleistungsrechner (IPVR)
7000 Stuttgart 1, Azenbergstr. 12, Tel 0711-121-1342, W-Germany
e-mail homeister@informatik.uni-stuttgart.dbp.de