Re: [Beowulf] Fortran Array size question

2009-11-04 Thread C. Bergström
Michael H. Frese wrote: I think Gus has it right. Your two arrays are 200 million floating point words each, perhaps 8 bytes per word, and therefore are approximately about 3 gigabytes total. That's too big for the default 'small' memory model. Certainly, there are no limits to array sizes

Re: [Beowulf] A look at the 100-core Tilera Gx

2009-11-04 Thread Greg Lindahl
On Wed, Nov 04, 2009 at 08:03:28AM -0600, Gerry Creager wrote: > And, > in the only reasonable space I can build out to expand into, power's $90K > and cooling another $100K to expand, allowing an additional 20 racks. Uh, I'm missing how this is a big problem... $200k or $300k of capital costs t

Re: [Beowulf] A look at the 100-core Tilera Gx

2009-11-04 Thread Gerry Creager
I think it was the recent IEEE Spectrum, where they talk about using the Tilera 100-core chips for HPC, tuned to a specific problem using FPGA for optimizing the chips to the problem. The argument is to use a lower-power system with huge numbers of cores and efficient on-chip switching, to rep