Observation of CreditNew Impact

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Message 1385528 - Posted: 28 Jun 2013, 20:09:45 UTC - in response to Message 1385432.  
Last modified: 28 Jun 2013, 20:12:05 UTC

...

0. One axiom: RAC matters. If you have robust mental health and laugh off things like this then you would have a hard time caring about CreditNew.

1. The new stock MB apps are closer to the optimized apps in performance than they were before V7.

2. The amount of computation has been increased per MB workunit.

3. CreditNew has been implemented in such a way that credit per MB workunit processed by stock has remained constant.

4. AP processing still generates RAC at the same rate as before.

Point 1. means that either RAC generated by stock had to go up or RAC generated by optimized had to go down.

Point 3. caused the latter to occur.

... nor has anyone come up with a practical way to make such a link in the mixed CPU/GPU world. ...

The thing that's indefensible as I see it is the difference in RAC generation between the current versions of optimized MB and AP. MB v7 increased the amount of computation while maintaining (stock) or decreasing (optimized) RAC. AP has not changed.

That means you can now receive a *lot* more credit by processing AP. ...


Thanks for a very good summary!

"Point 0" means a lot of heat generated on the forums. That likely also indicates that a lot of the people on the forums are the ones sensitive about credit/reward/recognition.

"Point 3" means that all the high energy optimised apps crunchers are now knocked back down into the realms of being averaged out with everyone else. Hence the angst?

The skew between MB and AP is bound to be a problem being as the MB application has changed whereas AP hasn't... Yet the credit calculations are changing as the CreditNew system catches up to the sudden stepwise change to the system inputs.


As to what to do?...

Well, the credits are pretty much arbitrary in any case. Hopefully, this event will spur some interest to look at CreditNew anew to allow a more sympathetic response to changes in the Boinc applications and to try to be more consistent in how credit is totaled.


Some time for the near future, I anticipate a huge upset for everyone with CreditNew once a GPU host (or even an APU host) encroaches to become the median machine...

Happy faster crunchin',
Martin
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Grant (SSSF)
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Message 1385543 - Posted: 28 Jun 2013, 20:55:50 UTC - in response to Message 1385528.  
Last modified: 28 Jun 2013, 20:56:13 UTC

Well, the credits are pretty much arbitrary in any case.

And that is the problem.
They are meant to be representaive of the amount of work done across projects. They're not.
So the problem needs to be fixed.


BTW- RAC is still falling on my faster system. It seems to have bottomoed out on the slower one.
Grant
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kittymanProject Donor
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Message 1385547 - Posted: 28 Jun 2013, 21:07:45 UTC - in response to Message 1385482.  

I wonder why I'm having so much trouble finding AP wu's to run?

What could be causing that? Hm.

Dunno........I have lots.
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Tutankhamon
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Message 1385550 - Posted: 28 Jun 2013, 21:14:19 UTC - in response to Message 1385547.  

I wonder why I'm having so much trouble finding AP wu's to run?

What could be causing that? Hm.

Dunno........I have lots.


Me too, I'm at the limit on my Q8200/ATI HD7870, and I got what I need and want on my other low producing computers too.

However, there's not much left to split of APs now, but I'm not even near panic mode yet :-)
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Rolf

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Message 1385903 - Posted: 29 Jun 2013, 21:27:52 UTC - in response to Message 1384143.  

My RAC dropped from 13300 (end of May 2013) to about 7100 (15th June 2013) at more or less constant speed.
Then it started increasing again but only at half the speed it was decreasing.
Will watch it carefully!

It seems to stabilize at about 60% of my "old" (13300) value, i.e. at about 8000. So "earnings" are 40% lower than in the good old days!
I'll leave it running like that!
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Message boards : Number crunching : Observation of CreditNew Impact


 
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