Author: Robert Hyatt
Date: 19:24:34 09/03/02
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On September 03, 2002 at 20:48:08, Gian-Carlo Pascutto wrote: >On September 03, 2002 at 20:20:48, Roger D Davis wrote: > >>Wow, this comment is in exceptionally bad taste. You don't question the >>scientific integrity of a researcher lightly, particularly in a public forum. > >I was responding to this post from Robert: > >---quote---- > >[snip]... But that >doesn't mean things were fabricated. > >But if you want to believe so, feel free. It doesn't change a thing either >way... > >------------ > >I don't know what exactly happend with the results. It seems from this thread >that even Robert doesn't know. Just because of this, no matter how they were >produced, I think they are questionable. > >-- >GCP Nah, that is utter nonsense, by any measure you care to name. The _speedup_ was the heart of the DTS results. DTS was about nothing other than producing a reasonable speedup on that particular machine, the Cray. The speedups were directly calculated from log files and checked and re-checked, even during the referee process. The nodes and times were added after the fact. Nodes I now remember _had_ to be calculated as there was no way to "observe" them in the context of a game-like search that doesn't always finish an iteration to reach a good node output point. The times I simply don't remember. But in the conversation this afternoon, it is certainly possible that computing the times would have been a natural thing to do as it was far easier and less error-prone, but I simply don't remember, and won't speculate that it was or wasn't done... If I had the logs, I could easily tell. But I don't, so I can't, so that's pretty much that. But the speedup data is _dead_ right. I think it pretty funny to make an issue about the two values that change the most in a parallel search, same position, different runs. :) There is already a significant error in reporting _any_ node counts, much less reporting "the" node count that really doesn't exist in a decent parallel search.
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