RE: [pooma-dev] Further improving guard update

[James Crotinger]

Hi Richard,

Wish you had been doing this a couple of years ago, when exponential decay hadn't set in so firmly. :)

I had been looking at similar ideas back in '99. I had considered adding a Smarts DataObject for each face in order to allow independent face-to-face dependency tracking (one would need to be careful with the corners here). There were complications to the idea, though I'm afraid I can't recall what they were. I still think this is probably the way to go - SMARTs uses these objects to build a dependency graph and then evaluates that graph in some "smart" order, hoping to reuse cache, etc. The prioritization algorithm was something we had planned to play with some more. (There were also some ideas about ways to produce fewer small iterates as these really kill you, and guard filling makes a lot of these.)

If I have time in the next week or so (I'm taking a bit of a break over the holidays), I'll see if I have my old email archive on one of my computers. There may be some ideas in old email. I don't think these ever reached the level of a white paper.

There are some published papers on SMARTs. The only one I have on my shelf is the Proceedings from ICS '99, p. 302. I'm sure there were some SuperComputing 9x papers as well.

Cheers,

        Jim

-----Original Message-----
From: Richard Guenther [mailto:address@hidden]
Sent: Saturday, December 27, 2003 2:28 PM
To: Richard Guenther
Cc: address@hidden
Subject: Re: [pooma-dev] Further improving guard update

On Fri, 26 Dec 2003, Richard Guenther wrote:

> - pass down the evaluation domain to the data object at request time (this
>   may be hard, as we're handling views here and need to go back to the
>   brick domain)

Ok, I convinced myself that the above should be the way to go.  But is it
possible at all?  At least one should be able to template it on the domain
type, so we can use AllDomain here for all requests we cannot (now) update
to the new mechanism.

How does SMARTS handle all its data analysis?

Thanks for any suggestions,

Richard.