BS2p Speed

Archiver

What is the advertised instructions/second speed of the BS2p?

-Thanks

Martin Hebel
SelmaWare Solutions
StampPlot -- Data Acquisition and Control for Your Micro and Imagination
http://www.selmaware.com

Archiver

>What is the advertised instructions/second speed of the BS2p?
>
>-Thanks
>
>Martin Hebel
>SelmaWare Solutions
>StampPlot -- Data Acquisition and Control for Your Micro and Imagination
>http://www.selmaware.com
>

it claims to do 4k lines per second, but they make no mention how they came
up with that.. it would vary drasticaly if the lines did a lot of math or
not

i'd like to see some honest instruction speed measurements myself

pepsi@c...

Archiver

Due to the structure of variable-length tokens and data in the Stamp, it's
very difficult to come up with an exact figure. Any, yes, mathematics
generally take longer. Since PBASIC is a specialized embedded language, it's
not possible to use "standardized" tests.

-- Jon Williams
-- Parallax


In a message dated 6/29/02 7:20:14 PM Central Daylight Time,
pepsi@c... writes:


> >What is the advertised instructions/second speed of the BS2p?
> >
> >-Thanks
> >
> >Martin Hebel
> >SelmaWare Solutions
> >StampPlot -- Data Acquisition and Control for Your Micro and Imagination
> >http://www.selmaware.com
> >
>
> it claims to do 4k lines per second, but they make no mention how they came
> up with that.. it would vary drasticaly if the lines did a lot of math or
> not
>
> i'd like to see some honest instruction speed measurements myself
>
> pepsi@c...
>




[noparse][[/noparse]Non-text portions of this message have been removed]

Archiver

Hi Martin,

It's possible to make solid comparisons of the speed of individual
instructions or the speed for matching sequences of instructions on
the different stamps.

I have found the BS2p to be about 20% faster than the BS2sx. For
example, to execute the high 1 command, the BS2 takes about 140
microseconds, the BS2sx about 55 microseconds, and the BS2p about 40
microseconds. I have information on timing of individual
instructions posted at
http://www.emesystems.com/BS2speed.htm#timetables
although it is still sparse on the BS2p.

The BS2p uses a 20mhz clock, the same as the clock speed of the
original Stamp 2, and 2/5 the 50mhz clock speed of the BS2sx. But
the BS2p uses an Ubicom SX48 chip running in turbo mode, which
executes instructions up to 4 times faster than the old
"compatibility" mode. The net result is that, despite the slower
resonator, on the average the BS2p is about 20 to 25% faster than the
BS2sx. [noparse][[/noparse]The BS2pe (in beta test for low power operation) uses an
8mhz clock and is about 20 to 25% faster than the BS2 and the BS2e.]

-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com


>Due to the structure of variable-length tokens and data in the Stamp, it's
>very difficult to come up with an exact figure. Any, yes, mathematics
>generally take longer. Since PBASIC is a specialized embedded language, it's
>not possible to use "standardized" tests.
>
>-- Jon Williams
>-- Parallax
>
>
>In a message dated 6/29/02 7:20:14 PM Central Daylight Time,
>pepsi@c... writes:
>
>
> > >What is the advertised instructions/second speed of the BS2p?
> > >
> > >-Thanks
> > >
> > >Martin Hebel
> > >SelmaWare Solutions
> > >StampPlot -- Data Acquisition and Control for Your Micro and Imagination
> > >http://www.selmaware.com
> > >
> >
> > it claims to do 4k lines per second, but they make no mention how they came
> > up with that.. it would vary drasticaly if the lines did a lot of math or
> > not
> >
> > i'd like to see some honest instruction speed measurements myself
> >
> > pepsi@c...
> >

Archiver

>Due to the structure of variable-length tokens and data in the Stamp, it's
>very difficult to come up with an exact figure. Any, yes, mathematics
>generally take longer. Since PBASIC is a specialized embedded language, it's
>not possible to use "standardized" tests.
>
>-- Jon Williams
>-- Parallax
>

i understand that you can't use a standard test to measure the speed, but
an attempt should be made to provide more meaningful data. how did
parallax come up with the figures they boast?

John Butera
pepsi@c...