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From: aslam@m.cs.uiuc.edu
Newsgroups: comp.sys.encore
Subject: EPT THREAD(disaster) - memory alloc
Message-ID: <37500008@m.cs.uiuc.edu>
Date: 8 Sep 89 03:10:00 GMT
Lines: 40
Nf-ID: #N:m.cs.uiuc.edu:37500008:000:1485
Nf-From: m.cs.uiuc.edu!aslam    Sep  7 22:10:00 1989



I am using the EPT (Encore Parallel Threads) package for a numerical
analysis application. The setup is rather simple: THREADgo followed by
a series of THREADcreate. The THREADcreate calls fail, perhaps due to
small stack size. This is what EPT reports:

--------------------------------------------
Memory allocation statistics 
free:	 0 255 122 48 29 0 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
used:	 0 1 6 16 3 0 1 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
	Total in use: 18512, total free: 18352

THREAD(disaster): pid 30359 (0): out of memory
IOT trap
--------------------------------------------

How do I interpret this information? EPT is out of memory but which memory
is it referring it to? I ask for a pretty large chunk in my THREADgo call.
I am liberal with stacks also. What do the two lines

free:	 0 255 122 48 29 0 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
used:	 0 1 6 16 3 0 1 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

mean?

I am using UMAX 4.2, R3.2.0 on a 10 processor Multimax.

An aside: how can use cdb to debug programs using EPT? CDB can keep
track of processes as they are forked but how do I step through the
program section as a thread executes it? Commands like '0 P', '1 P'
allow me to switch between processes but these are unix processes that
are servicing the threads I have created.

Sohail Aslam
Department of Computer Science
University of Illinois
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