Re: [9fans] 9pi + apple keyboard

["Lluís Batlle i Rossell" <viric@viric.name>]

On Wed, Jan 23, 2013 at 04:10:48PM -0500, erik quanstrom wrote:
> On Wed Jan 23 10:49:47 EST 2013, quanstro@quanstro.net wrote:
> > > Interesting results, thank you!
> > > The difference between the Pi and the Sheeva is quite huge,
> > > I wasn't excepting such difference.  This seems to confirm my
> > > initial thoughts regarding the Atom perfs.
> > 
> > that's just for floating point, which the sheeva doesn't have.
> > the newer model from the same line does have floating point:
> > 
> > http://www.globalscaletechnologies.com/p-58-mirabox-development-kit.aspx
> 
> richard, thanks for the floating point.  this is good stuff.
> this is better than 100x faster:
> 
> 	; >/dev/null time factor 281476419553081
> 	146.60u 0.01s 148.24r 	 factor 281476419553081
> 	; >/dev/null time /sys/src/cmd/5.factor 281476419553081
> 	1.20u 0.01s 1.22r 	 /sys/src/cmd/5.factor 281476419553081

Umh how does 'factor' relate to a FPU?
I don't have a plan9 running there, but the gnu 'factor' runs in 2.2s in
a raspberrypi, and 0.05s in a sheevaplug, here.

> (burncycles calculates the digits of pi using a taylor series
> expansion.  it uses all the tricks in the book to generate as
> few bits of the result per cycle possible, without being verbose,
> obtuse, or off task.  obviously, it was an accident.
> the very fast machines have the advantage of non-emulated
> vlongs, running amd64 kernels)

What are these emulated vlongs? Would that mean an atom computer would run
relevantly faster i686 code over x86_64 code?

Regards,
Lluís.