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RE: problem with heap, win32 error 487
- To: "'Thorsten Clevorn'" <clevorn at agere dot com>
- Subject: RE: problem with heap, win32 error 487
- From: Peter Buckley <peter dot buckley at cportcorp dot com>
- Date: Fri, 13 Jul 2001 11:53:55 -0400
- Cc: "'cygwin at cygwin dot com'" <cygwin at cygwin dot com>
Have you seen this thread about "heap error" from Dierk Bolton?
There might be more messages, I just grabbed the first one I saw.
Try searching google with
heap error site:cygwin.com
-Peter
>>>>
Thanks, that was exactly to the point. I intended to close each socket but
placed the close statement
into the wrong control block, therefore the socket was only closed when the
server could actually establish a connection to the math-doing client. Most
of the time, however, the client was not done yet with the simulation and
not accepting connections, and the close statement was not executed, thus
creating an increasing number of open sockets! Bad. Anyways, thanks to your
statement explaining the function of this heap, the problem was found
quickly.
Cheers,
Dierk
-----Ursprüngliche Nachricht-----
Von: Corinna Vinschen [mailto:cygwin@cygwin.com]
Gesendet: Wednesday, July 11, 2001 1:08 PM
An: 'cygwin@cygwin.com'
Betreff: Re: heap error
On Wed, Jul 11, 2001 at 11:26:59AM +0200, Bolten, Dierk wrote:
> In this case the server program dies after 2 hours or something with :
>
> couldn't commit memory for cygwin heap, Win 32 error 487
Each Cygwin app gets a special heap area to hold stuff which is
inherited to child processes. Eg. all file descriptor structures
are stored in that heap area (called the "cygheap"). The cygheap
has room for at least 4000 file descriptor structures. But - that's
the clue - it's fixed size. The cygheap can't grow. It's size is
reserved at the application's start and it's blocks are commited
on demand.
For some reason your server application needs all the cygheap
space when running under the described conditions.
Just a guess: Does your server forget to close file descriptors?
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Developer mailto:cygwin@cygwin.com
Red Hat, Inc.
-----Original Message-----
From: Thorsten Clevorn [mailto:clevorn@agere.com]
Sent: Friday, July 13, 2001 8:19 AM
To: cygwin@cygwin.com
Subject: problem with heap, win32 error 487
Hi,
I am trying to run a simulation in C on my Win2K-machine (the simulation
runs perfectly on a Linux-PC)
The problem seems to be with the memory rquirements.
With certain parameters, I get some huge
3-dimensional arrays that require like 20-40MB RAM.
When I have a size of about 22MB the simulation works fine, when I
increase the array size by a factor of ~1.33 (should then still be below
but close to 32MB) it doesn't start with the error message
C:\cygwin\home\clevorn\wlan15\Main.exe: *** Couldn't reserve space for
cygwin's heap (0x20030000) in child, cygheap, Win32 error 487
I tried two solutions posted in the mailing list for similiar problems:
first:
the "gcc -Wl,--heap,50000000,--stack,--50000000 ..." solution
here the simulation fails at small array sizes too.
second:
the "gcc -mno-cygwin ..." solution
here the program does start, but the only thing that happens is, if you
look in the task manager, the process slowly "collects" memory for about
90 seconds until it recaches 32MB (33xxxkB) and than the process crashes
with the windows message " the exception unknown software exception
(0xc00000fd) occured in the application at location 0x6104b9ef". During
that time the VM Size increases with the same rate, only it start at
values like 4xxMB or 6xxMB, depending on the array size (I have 1 GB RAM
so the pure size of these value isn't the real problem).
I think that the size of slightly below or even above 32MB is the cause
of the problem. Is there a general problem with cygwin and running
programs that require this amount of memory. Is there a way around this
problem.
Thanks for your help!
Regards,
Thorsten
$ cygcheck -s -v -r
Cygnus Win95/NT Configuration Diagnostics
Current System Time: Thu Jul 12 15:56:20 2001
WinNT Ver 5.0 build 2195 Service Pack 1, RC 1.1
Path: /usr/local/bin
/usr/bin
/bin
/cygdrive/c/WINNT/system32
/cygdrive/c/WINNT
/cygdrive/c/WINNT/System32/Wbem
/cygdrive/c/Program Files/Dazel/Output Envoy/bin
/cygdrive/c/Program Files/Microsoft Visual
Studio/Common/Tools/WinNT
/cygdrive/c/Program Files/Microsoft Visual
Studio/Common/MSDev98/Bin
/cygdrive/c/Program Files/Microsoft Visual Studio/Common/Tools
/cygdrive/c/Program Files/Microsoft Visual Studio/VC98/bin
SysDir: C:\WINNT\System32
WinDir: C:\WINNT
PWD = `/home/clevorn/wlan15'
USER = `Administrator'
MAKE_MODE = `unix'
HOME = `/home/Administrator'
NUMBER_OF_PROCESSORS = `2'
PROMPT = `$P$G'
LOGONSERVER = `\\PAI820ADDCAG01'
OS2LIBPATH = `C:\WINNT\system32\os2\dll;'
COMSPEC = `C:\WINNT\system32\cmd.exe'
!C: = `C:\cygwin\bin'
SYSTEMDRIVE = `C:'
HOSTNAME = `NJ9620TCLEVORN2'
INCLUDE = `C:\Program Files\Microsoft Visual
Studio\VC98\atl\include;C:\Program Files\Microsoft Visual
Studio\VC98\mfc\include;C:\Program Files\Microsoft Visual
Studio\VC98\include'
PROCESSOR_REVISION = `0806'
MSDEVDIR = `C:\Program Files\Microsoft Visual Studio\Common\MSDev98'
PATHEXT = `.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH'
COMPUTERNAME = `NJ9620TCLEVORN2'
WINDIR = `C:\WINNT'
USERPROFILE = `C:\Documents and Settings\clevorn.AGS'
PS1 = `\[\033]0;\w\007
\033[32m\]\u@\h \[\033[33m\w\033[0m\]
$ '
PROGRAMFILES = `C:\Program Files'
!:: = `::\'
MACHTYPE = `i686-pc-cygwin'
PROCESSOR_IDENTIFIER = `x86 Family 6 Model 8 Stepping 6, GenuineIntel'
OS = `Windows_NT'
OLDPWD = `/home/Administrator'
PROCESSOR_ARCHITECTURE = `x86'
TEMP = `/cygdrive/c/DOCUME~1/clevorn.AGS/LOCALS~1/Temp'
PROCESSOR_LEVEL = `6'
SYSTEMROOT = `C:\WINNT'
HOMEDRIVE = `C:'
LIB = `C:\Program Files\Microsoft Visual Studio\VC98\mfc\lib;C:\Program
Files\Microsoft Visual Studio\VC98\lib'
ALLUSERSPROFILE = `C:\Documents and Settings\All Users'
SHLVL = `1'
APPDATA = `C:\Documents and Settings\clevorn.AGS\Application Data'
COMMONPROGRAMFILES = `C:\Program Files\Common Files'
HOMEPATH = `\'
USERDOMAIN = `AGS'
USERNAME = `clevorn'
SHELL = `/bin/bash'
HOSTTYPE = `i686'
OSTYPE = `cygwin'
TERM = `cygwin'
SMS_LOCAL_DIR = `C:\WINNT'
_ = `/usr/bin/cygcheck'
TZ = `EST5EDT4,M4.1.0/2,M10.5.0/2'
HKEY_CURRENT_USER\Software\Cygnus Solutions
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2
(default) = `/cygdrive'
cygdrive flags = 0x00000022
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/
(default) = `C:/cygwin'
flags = 0x00000002
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/usr/bin
(default) = `C:/cygwin/bin'
flags = 0x00000002
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/usr/lib
(default) = `C:/cygwin/lib'
flags = 0x00000002
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MenuOrd
er\Start
Menu\Programs\Cygnus Solutions
(default) = (unsupported type)
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Program Options
a: fd N/A N/A
c: hd NTFS 17351Mb 36% CP CS UN PA FC
d: cd N/A N/A
C:\cygwin\bin /usr/bin user binmode
C:\cygwin\lib /usr/lib user binmode
C:\cygwin / user binmode
c: /cygdrive/c user binmode,noumount
Found: C:\cygwin\bin\bash.exe
Found: C:\cygwin\bin\cat.exe
Found: C:\cygwin\bin\cpp.exe
Found: C:\cygwin\bin\find.exe
Found: C:\cygwin\bin\gcc.exe
Found: C:\cygwin\bin\gdb.exe
Found: C:\cygwin\bin\ld.exe
Found: C:\cygwin\bin\ls.exe
Found: C:\cygwin\bin\make.exe
Found: C:\cygwin\bin\sh.exe
56k 2000/12/03 C:\cygwin\bin\cygbz21.0.dll - os=4.0 img=1.0 sys=4.0
"cygbz21.0.dll" v0.0 ts=2000/11/20 18:53
45k 2001/04/25 C:\cygwin\bin\cygform5.dll - os=4.0 img=1.0 sys=4.0
"cygform5.dll" v0.0 ts=2001/4/25 1:28
18k 2000/10/23 C:\cygwin\bin\cyggdbm.dll - os=4.0 img=1.0 sys=4.0
"cyggdbm.dll" v0.0 ts=2000/10/22 22:26
17k 2001/06/28 C:\cygwin\bin\cyghistory4.dll - os=4.0 img=1.0 sys=4.0
"cyghistory4.dll" v0.0 ts=2001/1/6 23:34
21k 2001/06/28 C:\cygwin\bin\cyghistory5.dll - os=4.0 img=1.0 sys=4.0
"cyghistory5.dll" v0.0 ts=2001/6/27 22:27
21k 2001/06/20 C:\cygwin\bin\cygintl.dll - os=4.0 img=1.0 sys=4.0
"cygintl.dll" v0.0 ts=2001/6/20 13:09
81k 2000/12/05 C:\cygwin\bin\cygitcl30.dll - os=4.0 img=1.0 sys=4.0
"cygitcl30.dll" v0.0 ts=2000/11/25 20:43
35k 2000/12/05 C:\cygwin\bin\cygitk30.dll - os=4.0 img=1.0 sys=4.0
"cygitk30.dll" v0.0 ts=2000/11/25 20:43
45k 2001/07/04 C:\cygwin\bin\cygjbig1.dll - os=4.0 img=1.0 sys=4.0
"cygjbig1.dll" v0.0 ts=2001/7/3 23:25
119k 2001/06/06 C:\cygwin\bin\cygjpeg6b.dll - os=4.0 img=1.0 sys=4.0
"cygjpeg6b.dll" v0.0 ts=2001/6/6 0:27
26k 2001/04/25 C:\cygwin\bin\cygmenu5.dll - os=4.0 img=1.0 sys=4.0
"cygmenu5.dll" v0.0 ts=2001/4/25 1:27
156k 2001/04/25 C:\cygwin\bin\cygncurses++5.dll - os=4.0 img=1.0
sys=4.0
"cygncurses++5.dll" v0.0 ts=2001/4/25 1:29
226k 2001/04/25 C:\cygwin\bin\cygncurses5.dll - os=4.0 img=1.0 sys=4.0
"cygncurses5.dll" v0.0 ts=2001/4/25 1:17
15k 2001/04/25 C:\cygwin\bin\cygpanel5.dll - os=4.0 img=1.0 sys=4.0
"cygpanel5.dll" v0.0 ts=2001/4/25 1:27
163k 2001/05/06 C:\cygwin\bin\cygpng2.dll - os=4.0 img=1.0 sys=4.0
"cygpng2.dll" v0.0 ts=2001/5/6 0:05
108k 2001/06/28 C:\cygwin\bin\cygreadline4.dll - os=4.0 img=1.0
sys=4.0
"cygreadline4.dll" v0.0 ts=2001/1/6 23:34
135k 2001/06/28 C:\cygwin\bin\cygreadline5.dll - os=4.0 img=1.0
sys=4.0
"cygreadline5.dll" v0.0 ts=2001/6/27 22:27
390k 2000/12/05 C:\cygwin\bin\cygtcl80.dll - os=4.0 img=1.0 sys=4.0
"cygtcl80.dll" v0.0 ts=2000/11/25 20:39
5k 2000/12/05 C:\cygwin\bin\cygtclpip80.dll - os=4.0 img=1.0 sys=4.0
10k 2000/12/05 C:\cygwin\bin\cygtclreg80.dll - os=4.0 img=1.0 sys=4.0
"cygtclreg80.dll" v0.0 ts=2000/11/25 20:39
245k 2001/06/12 C:\cygwin\bin\cygtiff3.dll - os=4.0 img=1.0 sys=4.0
"cygtiff3.dll" v0.0 ts=2001/6/12 13:25
623k 2000/12/05 C:\cygwin\bin\cygtk80.dll - os=4.0 img=1.0 sys=4.0
"cygtk80.dll" v0.0 ts=2000/11/25 20:43
41k 2001/07/04 C:\cygwin\bin\cygXpm-noX4.dll - os=4.0 img=1.0 sys=4.0
"cygXpm-noX4.dll" v0.0 ts=2001/7/3 21:21
45k 2001/07/04 C:\cygwin\bin\cygXpm-X4.dll - os=4.0 img=1.0 sys=4.0
"cygXpm-X4.dll" v0.0 ts=2000/11/19 21:45
49k 2001/02/03 C:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
"cygz.dll" v0.0 ts=2001/2/3 15:35
678k 2001/05/21 C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
"cygwin1.dll" v0.0 ts=2001/5/20 23:28
Cygwin DLL version info:
dll major: 1003
dll minor: 2
dll epoch: 19
dll bad signal mask: 19005
dll old termios: 5
dll malloc env: 28
api major: 0
api minor: 39
shared data: 3
dll identifier: cygwin1
mount registry: 2
cygnus registry name: Cygnus Solutions
cygwin registry name: Cygwin
program options name: Program Options
cygwin mount registry name: mounts v2
cygdrive flags: cygdrive flags
cygdrive prefix: cygdrive prefix
cygdrive default prefix:
build date: Sun May 20 23:28:17 EDT 2001
shared id: cygwin1S3
--
----------------------------------------------------------
Thorsten Clevorn mailto:clevorn@agere.com
----------------------------------------------------------
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