[ODE] (no subject)

[Erwin de Vries]

I made a huge pile of spheres using the previous build.  I could go VERY
high. At least 50 spheres. But at a certain point the framerate went down
very quickly, and about 2 or 3 spheres later it crashed. Didnt get a
stackpointer, but i thought i'd mention.

There is a much quicker way to get a stack overflow i believe. Just throw
many, many boxes at each other. Dont make a perfect stack. Just make sure
every box touches 3 or 4 other boxes. Kaboom!

Erwin

----- Original Message -----
From: "Russ Smith" <russ at q12.org>
To: "Shaul Kedem" <shaul_kedem at yahoo.com>
Cc: <ODE at q12.org>
Sent: Friday, November 09, 2001 02:38
Subject: Re: [ODE] (no subject)


> > Well, I ran it and this is what I got:
> > grabStackPtr, simLoop :0x68bff40
> > and
> > grabStackPtr, dInternalStepIsland_x2 :0x68be1ec
> >
> > shul
>
> that's not a lot of stack being used. i ran the test myself - with
> double precision, the boxstack demo rarely uses more that 10k of stack,
> even with up to 50 boxes. but i wasn't stacking them carefully and
> they were falling all over the place.
>
> a better test is test_chain1. with 50 spheres in the chain, most of
> which are sitting on the ground, the total constraint dimension
> count is M=228, and i got 506620 bytes of stack being used (500k).
> so:
>   stack space ~= 9.7457 M^2
>
> implying about one double precision number per M^2 slots plus a few
> M-sized vectors. so ODE's stack usage is reasonable.
>
> russ.
>
> --
> Russell Smith
> http://www.q12.org
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