Threaded 6.4 code compiled under 9.0 uses a lot more memory?..

[Alan Cox]

On Wed, Oct 31, 2012 at 2:06 PM, Konstantin Belousov <kostikbel at gmail.com>wrote:

> On Wed, Oct 31, 2012 at 11:52:06AM -0700, Adrian Chadd wrote:
> > On 31 October 2012 11:20, Ian Lepore <freebsd at damnhippie.dyndns.org>
> wrote:
> > > I think there are some things we should be investigating about the
> > > growth of memory usage.  I just noticed this:
> > >
> > > Freebsd 6.2 on an arm processor:
> > >
> > >   369 root 1   8  -88  1752K   748K nanslp   3:00  0.00% watchdogd
> > >
> > > Freebsd 10.0 on the same system:
> > >
> > >   367 root 1 -52   r0 10232K 10160K nanslp  10:04  0.00% watchdogd
> > >
> > > The 10.0 system is built with MALLOC_PRODUCTION (without that defined
> > > the system won't even boot, it only has 64MB of ram).  That's a crazy
> > > amount of growth for a relatively simple daemon.
> >
> > Would you please, _please_ do some digging into this?
> >
> > It's quite possible there's something in the libraries that are
> > allocating some memory upon first call invocation - yes, that's
> > jemalloc, but it could also be other things like stdio.
> >
> > We really, really need to fix this userland bloat; it's terribly
> > ridiculous at this point. There's no reason a watchdog daemon should
> > take 10megabytes of RAM.
> Watchdogd was recently changed to mlock its memory. This is the cause
> of the RSS increase.
>
>
Is it also statically linked?

Alan