Optimized Einstein@Home App
21 Oct 2006 17:19:50 UTC
Topic 191968
(moderation:
Hi everyone, I have 3 question here.
1. Is the App version on the "Faster all-sky pulsar search" already optimized to those cpu support SSE3?
2. If the App remove the graphic display code, will it run faster?
3. If the graphic is removed, is there a version that is "no graphic" and cpu optimized? (Just like the SETI@Home)
Thank you for answering my questions.
Optimized Einstein@Home App
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Bernd says he was unable to gain any speedup using SSE3 over the base SSE code. Since Akos was able to get a benefit with the s4 code and was hired on as a consultant for S5 I'm not sure why they weren't able to use SSE3 rounding to benefit the current app. One possibility is that the faster rounding came at a slight increase in inaccuracy, and with the longer integration time it builds up to a nontrivial level. That speculation is purely a SWAG on my part however.
There's not a no gfx version of the app, and since akos never chopped it out when he was hacking s4 to optimize it I'd assume there's no penalty to having it disabled.
I see, thank you for
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I see, thank you for answering my questions.
Hello, RE: Bernd says he
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Hello,
The SSE3 trunctaion is absolutely perfect, so there aren't any differences between the results. The SSE3 optimised code is about 15-20% faster.
You are right.
RE: The SSE3 trunctaion is
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Akos, do you refer to the current code or an older one (the one we started S5R1 with or even the 4.37 from S4)? I thougt that in the current code FISTTP is not of much use, and definitely not speeds up the overall computation by 20 or even 15%.
BM
BM
Hello
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Hello Bernd!
I have found that the current official 4.24 windows application didn't use any SSE3 instructions. I didn't understand the reason of it, but i though that you didn't want to release it because of compatibility or something else. So, i tried to implemet the SSE3 code snipetts that you also have and i found that it is a bit faster. I'm terrible sorry my inactivity, but i don't have any time.
RE: I'm terrible sorry my
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We're quite busy, too, getting the new hierarchical search code running which we intend to use for the next run. I doubt that I will have any time left for any more work on the current code.
BM
BM
where can i find these aps
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where can i find these aps and which one is the right one for me
RE: where can i find these
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You are running it now.
;-)
TTYL
Richard
o its automatic
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o its automatic
RE: o its automatic Once
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Once the science app is offical it's downloaded automatically.
New science apps that are improved (for whatever reason) are beta tested prior to their release. There is usually a notice of new apps in this forum when they become available and you can help test them on your pc then. However, from what I read in this thread, there doesn't appear to be much chance of that happening in this science run.
TTYL
Richard