How is claimed credit determined?

b.e.wilson
b.e.wilson
Joined: 20 Feb 05
Posts: 8
Credit: 13127
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Topic 187929

I've tried the documentation and the FAQ, and can find no explanation of how claimed credit is calculated. It does not seem to be determined by time alone.

I ask because most of my returned WU's claim 50 points, while many others claim about 100. In the end I get the 100 or so points because the validator uses the middle value of the many validated, but I'd rather not be the one that pulls someone's high credit WU down in points.

Steve Dundes
Steve Dundes
Joined: 22 Jan 05
Posts: 6
Credit: 7522
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How is claimed credit determined?

Bruce
The easy formula to use is this
claimed credit = ([whetstone]+[dhrystone]) * wu_cpu_time_in_sec / 1728000
Since two of your computers are using HT your benchmarks will be lower than if you had just one cpu. If you check the other results that claimed 100 you will probably see that they have only 1 cpu. The good thing about it is you get more credit and can run two WU's at the same time.

BTW nice photos. For img_4141, it is sad that others felt the need to write on and around it.

Cochise
Cochise
Joined: 11 Feb 05
Posts: 38
Credit: 3717
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Credit is granted in

Credit is granted in "cobblestones" and a cobblestone is 1/100 day of CPU time on a reference machine that does 1000 whetstones and 1000 Dhrystones for the benchmarks. So that's how the benchmark influences credit claimed and credit granted.

Thats the best I can come up with ;-/

Maybe someone else can do better...

Ooops I see someone did, Excellent! :-)

Great photos Bruce!

Paul D. Buck
Paul D. Buck
Joined: 17 Jan 05
Posts: 754
Credit: 5385205
RAC: 0

> I've tried the

> I've tried the documentation and the FAQ, and can find no explanation of how
> claimed credit is calculated. It does not seem to be determined by time
> alone.
>
> I ask because most of my returned WU's claim 50 points, while many others
> claim about 100. In the end I get the 100 or so points because the validator
> uses the middle value of the many validated, but I'd rather not be the one
> that pulls someone's high credit WU down in points.

I see what is missing. You wanted the FORMULA ...

why didn't you complain to the management? :)

I will add the formula to the Glossary entry for Claimed Credit ...

Also note that there are still discrepancies between the claims made by different platforms, the benchmark scores of your computers will vary quite a bit, and so, the claim per WU will vary over time ...

Paul D. Buck
Paul D. Buck
Joined: 17 Jan 05
Posts: 754
Credit: 5385205
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Steve, > The easy formula

Message 4902 in response to message 4899

Steve,

> The easy formula to use is this
> claimed credit = ([whetstone]+[dhrystone]) * wu_cpu_time_in_sec / 1728000

Where did you find this?

I mean it seems to be accurate, I was just wondering ...

Paul D. Buck
Paul D. Buck
Joined: 17 Jan 05
Posts: 754
Credit: 5385205
RAC: 0

> I've tried the

> I've tried the documentation and the FAQ, and can find no explanation of how
> claimed credit is calculated. It does not seem to be determined by time
> alone.

Now I have examples for how this calculation plays out ...

Enjoy!

b.e.wilson
b.e.wilson
Joined: 20 Feb 05
Posts: 8
Credit: 13127
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Thanks, guys. I've been

Thanks, guys.

I've been on a lot of boards (ham radio, photography, web coding, etc) and this is by far the most responsive and helpful of them all!

Paul D. Buck
Paul D. Buck
Joined: 17 Jan 05
Posts: 754
Credit: 5385205
RAC: 0

> Thanks, guys. You are

Message 4905 in response to message 4904

> Thanks, guys.

You are welcome! :)

I am always trying (I know, very trying), along with others to make it easiser and better for all participants.

Did the examples I drew up help?

> I've been on a lot of boards (ham radio, photography, web coding, etc) and
> this is by far the most responsive and helpful of them all!

Yes, well, we also have our few that sometimes seem more interested in strife than anything else. So, we are not perfect either ...

And I have been known to get "cross" a time or two ...

Steve Dundes
Steve Dundes
Joined: 22 Jan 05
Posts: 6
Credit: 7522
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> Steve, > > > The easy

Message 4906 in response to message 4902

> Steve,
>
> > The easy formula to use is this
> > claimed credit = ([whetstone]+[dhrystone]) * wu_cpu_time_in_sec /
> 1728000
>
> Where did you find this?
>
> I mean it seems to be accurate, I was just wondering ...
>
Paul
I got the formula from a thread on seti that I think Benher had posted. He had the long and simplified version of the formula. If you want to know the longer version here is what I copied from that thread.

Credit is claimed according to the following formula:
claimed credit = ([whetstone]+[dhrystone])/1000 * 100 / (2 * secs_per_day) * wu_cpu_time
or to simplify the equation, claimed credit = ([whetstone]+[dhrystone]) * wu_cpu_time / 1728000
Note: wu_cpu_time is the time taken to process the unit in seconds.

I guess I should have mentioned and you may want to put it in your documentation that the formula will not work for CPDN since they have a set amount of credit.

b.e.wilson
b.e.wilson
Joined: 20 Feb 05
Posts: 8
Credit: 13127
RAC: 0

> > Did the examples I drew

Message 4907 in response to message 4905

>
> Did the examples I drew up help?
>

Yes they did, Paul, but you refer to an image in your explanation that I didn't see.

John McLeod VII
John McLeod VII
Moderator
Joined: 10 Nov 04
Posts: 547
Credit: 632255
RAC: 0

> Bruce > The easy formula to

Message 4908 in response to message 4899

> Bruce
> The easy formula to use is this
> claimed credit = ([whetstone]+[dhrystone]) * wu_cpu_time_in_sec / 1728000
> Since two of your computers are using HT your benchmarks will be lower than if
> you had just one cpu. If you check the other results that claimed 100 you will
> probably see that they have only 1 cpu. The good thing about it is you get
> more credit and can run two WU's at the same time.
>
> BTW nice photos. For img_4141, it is sad that others felt the need to write on
> and around it.
>
There is a project specific constant that is be applied to the formula to reflect how much of the work is Floating Point and how much is Integer.

claimed credit - ( a * whetstone + (1 - a) * dhrystone) * wu_cpu_time_in_sec / 1728000.

where a is the fraction that should be attributed to the whetstone portion of the computation. I can never remember which is which.

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