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Re: [MANTA] Manta benchmark: float vs. double
Chronological
Thread
<
Chronological
>
<
Thread
>
From
: Aaron Knoll <knolla@cs.utah.edu>
To
: manta@sci.utah.edu
Subject
: Re: [MANTA] Manta benchmark: float vs. double
Date
: Thu, 13 Oct 2005 16:37:05 -0600
Interesting... I guess it boils down to what Steve said in 6620 about
"optimize only where you need to".
Are the triangle intersections still double?
-Aaron
On Thursday 13 October 2005 16:28, you wrote:
>
James corrected all of the manta code so that we can switch the Real
>
typedef between float and double and still recompile.
>
>
I ran a few benchmarks comparing the code before all of his changes
>
(r622), with the Real=float and Real=double (r623). There wasn't much of
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a difference in the Boeing777 code, however Real=double was faster for
>
scene0.
>
>
Much of the performance critical code in the kdtree is hard coded float.
>
We did a more limited experiment earlier and found a speedup from making
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that switch. (So the only difference in the path1 and path2 tests is in
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all of the core manta support code.
>
>
Boeing 777:
>
http://www.sci.utah.edu/~abe/manta_doc/mantatype-bench/path1.html
>
http://www.sci.utah.edu/~abe/manta_doc/mantatype-bench/path2.html
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http://www.sci.utah.edu/~abe/manta_doc/mantatype-bench/path2-720x405.html
>
>
Scene 0:
>
http://www.sci.utah.edu/~abe/manta_doc/mantatype-bench/scene0-720x405.html
>
>
Abe
[MANTA] Manta benchmark: float vs. double
,
Abe Stephens, 10/13/2005
Re: [MANTA] Manta benchmark: float vs. double
,
Aaron Knoll, 10/13/2005
Re: [MANTA] Manta benchmark: float vs. double
,
Abe Stephens, 10/13/2005
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