[ODE] low CPU utilization ...

[matsuda at mrt.dis.titech.ac.jp]

> If you're on a HyperThreaded P4 and are actively using only one
> thread; then if that thread runs at "full utilization", the OS will
> still report 50% CPU activity (because it treats it like 2 processors,
> and one of them seems idle).

True I use Pen4 w/ HT, but problem is not that.
Actually, I can run my simulator at full utilization w/o
"dsSimulationLoop."
Maybe things haven't been going well in that function.
I don't need simulation window by DrawStuff, so it's ok!

Thank you!

cheerybye,
	yoko