X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: Yes, hits=6.6 required=5.0	tests=AWL,BAYES_00,BOTNET,RCVD_IN_DNSWL_NONE
X-Spam-Check-By: sourceware.org
Message-id: <4E26D160.8010004@valdetaro.com>
Date: Wed, 20 Jul 2011 08:00:16 -0500
From: Luiz Claudio Valdetaro <luizclaudio AT valdetaro DOT com>
User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:5.0) Gecko/20110624 Thunderbird/5.0
MIME-version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: [bash or DLL] Memory leak in childs
References: <loom DOT 20110718T073757-2 AT post DOT gmane DOT org> <loom DOT 20110718T083650-815 AT post DOT gmane DOT org> <loom DOT 20110719T064243-907 AT post DOT gmane DOT org> <loom DOT 20110719T092021-102 AT post DOT gmane DOT org> <loom DOT 20110719T101702-272 AT post DOT gmane DOT org> <loom DOT 20110720T032257-444 AT post DOT gmane DOT org>
In-reply-to: <loom.20110720T032257-444@post.gmane.org>
Content-type: text/plain; charset=ISO-8859-1; format=flowed
Content-transfer-encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

Classic.... this is windows for you. And they want me to get a phone 
based in Windows? Or a Ford Fusion, based on Windows? LOL

On 7/19/2011 8:40 PM, Mark Geisert wrote:
> Heiko Elger writes:
>> I just used another small testcase doing the same.
> [...]
>> $ cat test2.sh
>> #!/bin/sh
>> trap "echo TRAP; exit -1" SIGHUP SIGINT SIGQUIT SIGILL SIGTRAP SIGABRT
>> SIGEMT SIGFPE SIGKILL SIGBUS SIGSEGV SIGSYS SIGPIPE SIGALRM SIGTERM
>> SIGURG SIGSTOP SIGTSTP
>> SIGCONT SIGCHLD SIGTTIN SIGTTOU SIGIO SIGXCPU SIGXFSZ SIGVTALRM SIGPROF
>> SIGWINCH SIGPWR SIGUSR1 SIGUSR2 SIGRTMAX
>>
>> while ./exiter-vs2003.exe ; do
>>      echo -n $?
>> done
>> echo RC=$?
>> ****** snip snip snip ******
>>
>> exiter-vs2003.c.c ist compiled with MS Visual Studio 2003
>> ****** snip snip snip ******
>> $ cat exiter-vs2003.c
>> #include<stdio.h>
>>
>> int main(int argc, char** argv[])
> (I won't point out the error in the above line.)
>
>> {
>>      printf(".");
>>      return 0;
>> }
> Thanks very much for the specific info.  I happened to have VS 2003 around
> so I was able to build the toy program.
>
> The bad news is that I did reproduce what you're seeing on my quad-core 2.6Ghz
> system.  Over a 15 minute span peak memory use went from 227MB to 392MB.  After
> that point the system seemed to go kind of haywire: window title bars were no
> longer being refreshed but rather overwritten, no further output in the window
> running the 10 copies of test2.sh, Task Manager having trouble refreshing its
> displays.  I rebooted the system because I no longer trusted its operation.
>
> The good news is that I was then able to reproduce the issue without Cygwin.
> I coded up a "test2.bat" as follows:
> @echo off
> :again
> exiter-vs2003
> echo %errorlevel%
> if %errorlevel%==0 goto again
>
> ..and a "driver.bat" to launch 10 copies of test2.bat as follows:
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
> start /b test2.bat
>
> I did all that in a Command Prompt window so that Cygwin was not involved in
> any way.  Then I started up driver.bat.
>
> After 15 minutes, peak memory usage had gone from 227MB to 334MB and the
> system went haywire in the same fashion as before.  I rebooted again.
>
> The moral of this story seems to be: Running an executable many thousands of
> times with multiple copies running at once eventually uses up some critical
> Windows internal resource(s) and causes the system to malfunction.  It doesn't
> matter whether the executable is run from a Cygwin environment or a native
> Windows environment.
> HTH,
>
> ..mark
>
>
>
> --
> Problem reports:       http://cygwin.com/problems.html
> FAQ:                   http://cygwin.com/faq/
> Documentation:         http://cygwin.com/docs.html
> Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
>
>

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple