Observation of CreditNew Impact (2)

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Eric Korpela Project Donor
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Message 1406590 - Posted: 22 Aug 2013, 18:03:51 UTC - in response to Message 1406574.  

Eric, is it possible that the differences in credit rates for MB and AP cpu are due to different hardware populations? IE people with higher-end hardware choose not to run AP?


It's possible. The differences between CUDA5 and CUDA2.3 are significantly due to hardware differences. I haven't done statistics on how many people have turned off either astropulse or setiathome. If I get time, maybe I'll try.
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Message 1406591 - Posted: 22 Aug 2013, 18:06:28 UTC - in response to Message 1406589.  
Last modified: 22 Aug 2013, 18:09:09 UTC

I am assuming 1 per GPU. I assume that accounts for the majority of our users and result.

That could be one of the sources of the diferences, most of the big crunchers runs 2 or more WU MB and normaly only 1 AP at a time, at least those who have a NV fermi/keppler based or newer ATI GPUs, as most of the 100 top crunchers have just look the top hosts lists. Sure they have a very large contribution on the GPU´s crunched totals.
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Message 1406613 - Posted: 22 Aug 2013, 18:40:19 UTC

Thanks very much Eric for taking the time and trouble to respond with as much precision.
Really appreciated. It's always good to have answers.
So we have to get used to this new situation. Sniff...
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Message 1406681 - Posted: 22 Aug 2013, 20:46:33 UTC - in response to Message 1406553.  
Last modified: 22 Aug 2013, 20:53:00 UTC

In Astropulse the GPU routines were written directly in OpenCL.

Part was written in Brook+ and ported to OpenCL too.

EDIT: and indeed that table includes only credits per app. W/o hardware classes.
For example, ati_cal gives very low credits per hour. What it means? It just means that app mostly run on very old and slow hardware (as should be).
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Message 1406693 - Posted: 22 Aug 2013, 21:35:55 UTC - in response to Message 1406406.  
Last modified: 22 Aug 2013, 21:50:45 UTC

Every credit method we've ever used, with the exception of FLOP counting punished optimization, especially optimization of the stock apps.

That´s a real paradox, imagine what could happening if you punish your employee because he produce more...


You're not an employee--you're not paid-you choose to run Seti. Please stop using the analogy.


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Message 1406695 - Posted: 22 Aug 2013, 21:51:05 UTC - in response to Message 1406693.  
Last modified: 22 Aug 2013, 21:51:32 UTC

Every credit method we've ever used, with the exception of FLOP counting punished optimization, especially optimization of the stock apps.

That´s a real paradox, imagine what could happening if you punish your employee because he produce more...


You're not an employee--you're not paid-you choose to run Seti. Please stop comparing the two situations.

Sure you don´t read the entire thread, Eric explain why all things happening and now we move to a next level, try to find way the diference apears and if possible find a fix for that.
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Message 1408085 - Posted: 26 Aug 2013, 20:07:34 UTC

This is another way this glitch is affecting people:

This computer never runs out of AP work and has no concerns about the V7 credits. His next step is, I expect, to hide his computers so no one will know what he's doing.

All tasks for computer 6016862

State: All (752) · In progress (391) · Validation pending (261) · Validation inconclusive (13) · Valid (86) · Invalid (0) · Error (1)
Application: All (752) · AstroPulse v6 (703) · SETI@home Enhanced (5) · SETI@home v7 (44)
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Message 1408087 - Posted: 26 Aug 2013, 20:20:02 UTC - in response to Message 1408085.  
Last modified: 26 Aug 2013, 20:21:53 UTC

This is another way this glitch is affecting people:

This computer never runs out of AP work and has no concerns about the V7 credits. His next step is, I expect, to hide his computers so no one will know what he's doing.

All tasks for computer 6016862

State: All (752) · In progress (391) · Validation pending (261) · Validation inconclusive (13) · Valid (86) · Invalid (0) · Error (1)
Application: All (752) · AstroPulse v6 (703) · SETI@home Enhanced (5) · SETI@home v7 (44)

Read this it´s all about his owner, hope he allready stops to recheduling.

http://setiathome.berkeley.edu/forum_thread.php?id=72502

Yes that another good reason why someone must fix that soon.

But give some time to Eric, he post why the diference is happenings and belive he´s allready working on that.
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Message boards : Number crunching : Observation of CreditNew Impact (2)


 
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