You cannot use calloc inside of RT tasks: you must statically allocate
space on startup in Linux.
On Wed, Apr 25, 2001 at 07:57:55AM -0600, Steven Fletcher wrote:
>
>
> To ensure that I indeed was not suffering from lack of SRAM I
> just popped in an additional 128M and STILL get the page fault.
> Interestingly enough the stack indicates that the offending
> instruction lies somewhere in __pthread_mutex_trylock.
> Go figure...
>
> >
> > Okay... Here is the issue. I have an rtlinux application
> > that is attempting to allocate 17k using the calloc function.
> > rtl_debug informs me that it is indeed a page fault (exceptionVector = 0xe)
> > and a stack dump in gdb shows this occurs in calloc ( actually
> > in __libc_calloc).
> > I notice that if I dynamically allocate memory in small enough chunks
> > (like less than 128 bytes at a time) I am safe for awhile but eventually
> > will cause a page fault if I go too far.
> > I have 128M of memory in the PC. I have set append="mem=127M" in lilo.conf.
> > Some other interesting facts...
> >
> > The kpm process manager shows the following statistics:
> >
> > mem 124M avail, 26M used
> > 47M buffered, 40M cache
> > 9852K free
> >
> > I am running under rtlinux 3.0 (the 2.2.18-rtl kernel) Red Hat 6.2
> >
> >
> > Can anyone enlighten me... provide hints as to where to look next?
> > I am at a loss and now just want to drink coffee instead of bang my
> > head against this problem any longer.
> >
> >
> > Many thanks for any ideas/suggestions...... Steve
> >
> >
> > Steve Fletcher E_MAIL: [EMAIL PROTECTED]
> > Sr Software Engineer VOICE : (505) 434-7102
> > National Solar Observatory/SP FAX : (505) 434-7029
> > Sunspot, NM 88349 USA WWW : http://www.sunspot.noao.edu
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> >
>
> Steve Fletcher E_MAIL: [EMAIL PROTECTED]
> Sr Software Engineer VOICE : (505) 434-7102
> National Solar Observatory/SP FAX : (505) 434-7029
> Sunspot, NM 88349 USA WWW : http://www.sunspot.noao.edu
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--
---------------------------------------------------------
Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
www.fsmlabs.com www.rtlinux.com
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