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Reply-To: aek AT pumpkininc DOT com
From: "Andrew Kalman" <aektravel AT hotmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: vfork problems on Win98 -- is there a fix? 
Date: Sat, 08 Sep 2001 22:19:14 -0700
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X-OriginalArrivalTime: 09 Sep 2001 05:19:14.0855 (UTC) FILETIME=[F77BEB70:01C138EE]

I have some more data on my vfork problem ...

The recursive Makefile calls only two programs outside the Cygwin realm -- 
picc.exe (a compiler) and libr.exe (the associated librarian).

I did a test where I called these two programs from an MS-DOS batch file 
using the same command-line arguments as I use in the Makefile, and I looped 
it to run continuously. No memory leaks were observed (Win98 machine).

I then rank Win2000's Task Manager while I ran the Makefile on that machine. 
Physical Memory was reduced by 22MB over the course of 1 hour, during which 
140 libraries were built. After 1 hour (59 minutes to be exact), picc.exe 
was unable to write a particular object file, and make terminated 
abnormally. During this hour, the shell was invoked by make 140 times, make 
was called recursively 140 times, there were 140*50 (number of source files) 
= 7,000 calls to picc.exe, and 140 calls to libr.exe.

From this I conclude that there's a memory leak in either make, vfork (which 
I assume is what allows me to invoke the bash shell from inside make), or 
the shell itself.

Am I right? And as before, is there a fix?

--------------------------
Andrew E. Kalman, Ph.D.  aek AT pumpkininc DOT com


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