[Sidefx-houdini-list] stability of mantra on multi core machines?

paul simpson paul at realisestudio.com
Mon Jul 28 09:30:08 EDT 2008


wow - that sucks!  we had a similar problem and found that mantra exits
pretty disgracefully when it's out of memory.  you approaching any memory
limits when rendering?  (try verbose level 2).



2008/7/28 Michael O'Brien <mobrien at pixar.com>

> Hola~
>
> I'm trying to render a scene that around a million particles as transparent
> sprites. I've turned off ray tracing, no gather, no other geometry. The
> shaders are a layer and a mantra sprite procedural. The scene was more for
> testing than anything else.
>
> I've had no problems on a machine with two cores. However, on an eight core
> machine, my record is rendering 122 frame in a row without a crash or
> deadlock. Usually I get less than 10 frames before the process freezes.
>
> MO
>
> --
> Michael K O'Brien                               Production Engineering
> Pixar                                                mobrien at pixar.com
>
> REMY: What is that?
> EMILE: I don't really know.
> REMY: You don't know... and you're eating it.
> > -----Original Message-----
> > From: sidefx-houdini-list-bounces at sidefx.com [mailto:
> sidefx-houdini-list-
> > bounces at sidefx.com] On Behalf Of paul simpson
> > Sent: Monday, July 28, 2008 4:45 AM
> > To: sidefx-houdini-list at sidefx.com
> > Subject: Re: [Sidefx-houdini-list] stability of mantra on multi core
> > machines?
> >
> > we've been using mantra in multi-threaded mode extensively recently and
> > have
> > found it to be pretty rock solid!  this is both in pbr mode as well as
> mp.
> > also using the gather construct a lot - all seems fine and dandy.  can
> you
> > be more specific with what your doing?  ie, passing information using
> > gather?  importing vars from other contexts (displacement, light),
> > volumes,
> > sub-d's, dof etc. etc....?
> >
> >
> >
> > 2008/7/26 Michael K O'Brien <mobrien at pixar.com>
> >
> > > Hola~
> > >
> > > I'm getting mantra (that ships with 9.1.179) to wedge fairly
> > consistently
> > > on
> > > a dual proc/8 core machine. When I use it on a dual and single proc
> > > machines, I haven't had these problems.
> > >
> > > Anyone else out there rendering multiple frames on Linux with a multi-
> > core
> > > machine?
> > >
> > > When it goes thru, it is incredibly fast. I'm getting 6-7x speedup from
> > > single processor.
> > >
> > > MO
> > >
> > > --
> > > Michael K O'Brien
> > > mobrien at pixar.com
> > > Pixar
> > >
> > > JEN: Just because it's Taco Bell doesn't mean it's not dinner!
> > >
> > >
> > >
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