Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread Mathieu Lonjaret
And it even makes a very decent christmas tree, with all the pretty lights! ;)

On Tue, Nov 30, 2010 at 6:56 PM, ron minnich rminn...@gmail.com wrote:
 Here is our latest minicluster design.

 We used the gumstix stagecoach.

 It's nice, 196 Ovaros in a box. We had a number of failed attempts on
 an enclosure design:
 http://picasaweb.google.com/rminnich/Strongbox?authkey=Gv1sRgCI6PwZXM57iZ8gE#

 That was my first design, it was really quite compact and fun, and it
 was a huge pain to assemble. It hit the basic high points however: 7
 nodes per stagecoach, 7 stagecoaches per shelf, a switch per shelf
 that reduced the outgoing enet cables to one. Power was a huge issue;
 5V 80A per shelf, which was not fun. 10 GA wires never are.

 I know at least some people on this list know Mitch Williams. He came
 up with this:
 http://picasaweb.google.com/rminnich/StrongboxAtSC10?authkey=Gv1sRgCJbWpcfci73HxwE#
 It's quite elegant: self-contained shelves, with power supply,
 Rigrunner for fuses,
 continues the use of an 8-port switch per shelf, so each shelf has one
 120V power cable and one enet cable coming out.

 Plan 9 is in the works. This is a nice test and development platform
 for software. We're going to make the design available in a way that
 people can easily build their own.

 ron





Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread Richard Miller
Very nice, and very reminiscent of the processor farms we used to
build out of gumstix-sized transputer TRAM modules in the late '80s.

Of course you'd need a whole boxful of 20Mhz transputers to compete
with a single 600Mhz omap, but the transputer did make it surprisingly
easy to get linear speedups by adding more processors, thanks to the
low latency of communication on its serial links.  Because link
read/write was performed with a single instruction, with process
scheduling and interrupt handling microcoded into the cpu (no kernel
required), the overhead for a send or receive (from user code to bits
on the wire or vice versa) was about 20 cycles, or 1μs.  I would be
interested to know the equivalent figure for overo's ethernet (with
linux or plan 9 helping out).




Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread Skip Tavakkolian
Very cool!  more lights than the WOPR and slightly less than the
Connection Machine :)

The Stagecoach board seems to be available on gumstix site. Anyone order it yet?

-Skip

On Tue, Nov 30, 2010 at 9:56 AM, ron minnich rminn...@gmail.com wrote:
 Here is our latest minicluster design.

 We used the gumstix stagecoach.

 It's nice, 196 Ovaros in a box. We had a number of failed attempts on
 an enclosure design:
 http://picasaweb.google.com/rminnich/Strongbox?authkey=Gv1sRgCI6PwZXM57iZ8gE#

 That was my first design, it was really quite compact and fun, and it
 was a huge pain to assemble. It hit the basic high points however: 7
 nodes per stagecoach, 7 stagecoaches per shelf, a switch per shelf
 that reduced the outgoing enet cables to one. Power was a huge issue;
 5V 80A per shelf, which was not fun. 10 GA wires never are.

 I know at least some people on this list know Mitch Williams. He came
 up with this:
 http://picasaweb.google.com/rminnich/StrongboxAtSC10?authkey=Gv1sRgCJbWpcfci73HxwE#
 It's quite elegant: self-contained shelves, with power supply,
 Rigrunner for fuses,
 continues the use of an 8-port switch per shelf, so each shelf has one
 120V power cable and one enet cable coming out.

 Plan 9 is in the works. This is a nice test and development platform
 for software. We're going to make the design available in a way that
 people can easily build their own.

 ron





Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread ron minnich
On Wed, Dec 1, 2010 at 11:32 AM, Skip Tavakkolian
skip.tavakkol...@gmail.com wrote:
 Very cool!  more lights than the WOPR and slightly less than the
 Connection Machine :)

 The Stagecoach board seems to be available on gumstix site. Anyone order it 
 yet?

we ordered them :-)

ron



Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread Steve Simon
 Very cool!  more lights than the WOPR and slightly less than the
 Connection Machine :)

I have never forgotten the day I asked about changing the baud rate on a serial
line on my colleges Honeywell level 66 mainframe. They took me into the machine 
room
and opened one of the cupboards to show me the wirewrap that would need to be 
changed.

I don't remember the details as I was mesmerised by the thousands of flashing 
LEDs,
wonderful stuff.

The good news from Ron's photos is it seems they do make 'em like they used to,
abet a little smaller.

-Steve



Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread Skip Tavakkolian
good to know; for some reason I thought you were getting early
engineering samples.

-Skip

On Wed, Dec 1, 2010 at 11:39 AM, ron minnich rminn...@gmail.com wrote:
 On Wed, Dec 1, 2010 at 11:32 AM, Skip Tavakkolian
 skip.tavakkol...@gmail.com wrote:
 Very cool!  more lights than the WOPR and slightly less than the
 Connection Machine :)

 The Stagecoach board seems to be available on gumstix site. Anyone order it 
 yet?

 we ordered them :-)

 ron





Re: [9fans] latest minicluster: ARM fun

2010-12-01 Thread Lucio De Re
 The good news from Ron's photos is it seems they do make 'em like they used 
 to,
 abet a little smaller.

And the biblical number seven is also back, although not in the
seventy times seven form yet :-)

++L




[9fans] latest minicluster: ARM fun

2010-11-30 Thread ron minnich
Here is our latest minicluster design.

We used the gumstix stagecoach.

It's nice, 196 Ovaros in a box. We had a number of failed attempts on
an enclosure design:
http://picasaweb.google.com/rminnich/Strongbox?authkey=Gv1sRgCI6PwZXM57iZ8gE#

That was my first design, it was really quite compact and fun, and it
was a huge pain to assemble. It hit the basic high points however: 7
nodes per stagecoach, 7 stagecoaches per shelf, a switch per shelf
that reduced the outgoing enet cables to one. Power was a huge issue;
5V 80A per shelf, which was not fun. 10 GA wires never are.

I know at least some people on this list know Mitch Williams. He came
up with this:
http://picasaweb.google.com/rminnich/StrongboxAtSC10?authkey=Gv1sRgCJbWpcfci73HxwE#
It's quite elegant: self-contained shelves, with power supply,
Rigrunner for fuses,
continues the use of an 8-port switch per shelf, so each shelf has one
120V power cable and one enet cable coming out.

Plan 9 is in the works. This is a nice test and development platform
for software. We're going to make the design available in a way that
people can easily build their own.

ron