Date: Fri, 20 Jul 2001 12:04:00 -0700 From: Jim Pirzyk <Jim.Pirzyk@disney.com> To: Terry Lambert <tlambert2@mindspring.com> Cc: arch@FreeBSD.ORG Subject: Re: Setting the default MAX Stack size Message-ID: <0107201204000G.07804@snoopy> In-Reply-To: <3B585109.ED17E59B@mindspring.com> References: <01071816182904.00720@snoopy> <01071908363603.07804@snoopy> <3B585109.ED17E59B@mindspring.com>
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On Friday 20 July 2001 08:40 am, Terry Lambert wrote:
> Jim Pirzyk wrote:
> > On Thursday 19 July 2001 01:16 am, Terry Lambert wrote:
> > > Jim Pirzyk wrote:
> > > > So I have a need to increase the max stack size in the kernel.
>
> [ ... ]
>
> > > > Suggestions?
> > >
> > > Change your code to not use so much auto variable space; if
> > > you are using this much space, you need to rethink your
> > > algorithm.
> >
> > The program that is being used is by one of our developers and it
> > is using recursion internally to do smog particle simulation over
> > many frames (visual effects). Or systems are installed with
> > 2GB of memory and they set there stack size to 128MB (from 64MB).
> >
> > The program could write its data out to disk, but then the
> > performance gets killed.
> >
> > We also had to knock up the stack size on the linux systems that
> > these programs are actually developed on.
>
> I don't understand why the kernel stack size has anything to
> do with this, unless you are implementing this in the kernel.
>
> If you are running out of kernel stack, we need to know where,
> since that sould be a serious bug.
Ah, here is the disconnect. I am talking the user's max stack
size which is a parameter in the kernel, not the kernel's
stack size. Changing MAXSSIZ in the kernel allows you to type
limit stacksize 262143
- JimP
--
--- @(#) $Id: dot.signature,v 1.10 2001/05/17 23:38:49 Jim.Pirzyk Exp $
__o Jim.Pirzyk@disney.com ------------- pirzyk@freebsd.org
_'\<,_ Senior Systems Engineer, Walt Disney Feature Animation
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