is F@H single or double precision?
Posted: Mon Apr 27, 2009 9:06 am
is F@H single or double precision?
I have a wild guess -- single
Jaak
Folding Forum
Community driven support forum for Folding@home
https://foldingforum.org/
is F@H single or double precision?
Page 1 of 1
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 9:38 am
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 10:24 am
I think all the fah cores are single precision, except for the double gromacs cores (79,7b,7c), those are double precision.
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 11:41 am
Here is a list of all cores that have ever been used in FAH with a brief description : http://fahwiki.net/index.php/Cores
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 1:01 pm
I guess the GPU cores are single, because they run on HD 2x00, which do not have double precision.
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 3:51 pm
All cores are single precision except the three DGromacs cores which are double precision, as said by ^w^ing.
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 5:53 pm
woohoo \o/John Naylor wrote:All cores are single precision except the three DGromacs cores which are double precision, as said by ^w^ing.
Re: is F@H single or double precision?
Posted: Mon Apr 27, 2009 8:12 pm
There's someone who know's GPUs.metal03326 wrote:I guess the GPU cores are single, because they run on HD 2x00, which do not have double precision.
Here's another bit of trivia for you to tuck away...mhouston wrote:It's all currently single precision. All 800 on the 48XX SPs can support single precision floating point, leading to a 2.5X increase in peak performance. Double precision on the 48XX is also 2.5X the performance of the 38XX.
VijayPande wrote:With a lot of effort, one can rewrite code that depends on double precision to run in single. It's rare that the whole code requires double -- usually there's just a few precision sensitive parts. By treating these parts carefully (e.g. reordering the numerics to avoid things like adding big numbers to small numbers, etc.) single precision can always work, but with a lot of effort in some cases.
We've already done that effort in GPU1, so the GPU2 code benefits from this today.
Re: is F@H single or double precision?
Posted: Tue May 12, 2009 4:30 pm
Good to know. Thanks guys. 
Re: is F@H single or double precision?
Posted: Sun May 17, 2009 4:30 pm
Indeed.alpha754293 wrote:Good to know. Thanks guys.
Quite.