"Claimed Credit" - What's Up?

eeqmc2_52
eeqmc2_52
Joined: 10 May 05
Posts: 38
Credit: 3674966915
RAC: 949291
Topic 189950

Starting on 9/26/2005 my claimed credits dropped from a typical 70+ to 58 for doing the same amount of work. Has the system been recalibrated or is this some type of bug?

There are only 10 kind of people in the world, those that understand binary and those that don't!

Tern
Tern
Joined: 27 Jul 05
Posts: 309
Credit: 99440614
RAC: 1

"Claimed Credit" - What's Up?

Claimed credit is calculated by BOINC Manager on your computer, based on the benchmarks that run every five days. Most likely cause for a sudden drop like this is that the last time the benchmarks ran, something very CPU intensive happened to be running at the same time. You can look at the values on the "your computer" page and see if they look low. If so, you can make sure nothing else is running but BOINC, and choose "Run benchmarks" from the menu, then hit "Update" on the projects to send the new values to the servers.

eeqmc2_52
eeqmc2_52
Joined: 10 May 05
Posts: 38
Credit: 3674966915
RAC: 949291

RE: Claimed credit is

Message 17509 in response to message 17508

Quote:
Claimed credit is calculated by BOINC Manager on your computer, based on the benchmarks that run every five days. Most likely cause for a sudden drop like this is that the last time the benchmarks ran, something very CPU intensive happened to be running at the same time. You can look at the values on the "your computer" page and see if they look low. If so, you can make sure nothing else is running but BOINC, and choose "Run benchmarks" from the menu, then hit "Update" on the projects to send the new values to the servers.

This fixed my problem - Thanks.

There are only 10 kind of people in the world, those that understand binary and those that don't!

Stick
Stick
Joined: 24 Feb 05
Posts: 790
Credit: 33119234
RAC: 2279

I have noticed that results

I have noticed that results in a quorum often vary widely in claimed credit. (An example is shown in this WU - http://einsteinathome.org/workunit/2258857.) Notice that one result (mine) claims 107.61 credit with only 32,160.40 cpu sec while another claims only 67.66 credits but used a lot more time - 39,204.44 cpu sec. Is this a "Benchmarking" issue or is there some other explanation?

Pooh Bear 27
Pooh Bear 27
Joined: 20 Mar 05
Posts: 1376
Credit: 20312671
RAC: 0

Claimed Credit explained in

Claimed Credit explained in the Boinc WIKI.

Michael Roycraft
Michael Roycraft
Joined: 10 Mar 05
Posts: 846
Credit: 157718
RAC: 0

RE: I have noticed that

Message 17512 in response to message 17510

Quote:
I have noticed that results in a quorum often vary widely in claimed credit. (An example is shown in this WU - http://einsteinathome.org/workunit/2258857.) Notice that one result (mine) claims 107.61 credit with only 32,160.40 cpu sec while another claims only 67.66 credits but used a lot more time - 39,204.44 cpu sec. Is this a "Benchmarking" issue or is there some other explanation?

Stick,

Long story short - Your benchmarks are nearly twice what the other has, and so your claimed credit/crunchtime ratio is nearly twice as high, also.

microcraft
"The arc of history is long, but it bends toward justice" - MLK

Stick
Stick
Joined: 24 Feb 05
Posts: 790
Credit: 33119234
RAC: 2279

RE: RE: I have noticed

Message 17513 in response to message 17512

Quote:
Quote:
I have noticed that results in a quorum often vary widely in claimed credit. (An example is shown in this WU - http://einsteinathome.org/workunit/2258857.) Notice that one result (mine) claims 107.61 credit with only 32,160.40 cpu sec while another claims only 67.66 credits but used a lot more time - 39,204.44 cpu sec. Is this a "Benchmarking" issue or is there some other explanation?

Stick,

Long story short - Your benchmarks are nearly twice what the other has, and so your claimed credit/crunchtime ratio is nearly twice as high, also.

So, if I understand this correctly, the other guy's computer was supposedly benchmarked at a time when it was also busy doing something else (and therefore got a low score) but it crunched its WU at a time when it wasn't so busy. I didn't notice this to begin with, but the other computer is listed as having 2 cpu's. I wonder if that could have anything to do with it. That is, could there be a bug/flaw in the benchmarking process that doesn't account for multiple cpu's properly?

Michael Roycraft
Michael Roycraft
Joined: 10 Mar 05
Posts: 846
Credit: 157718
RAC: 0

RE: RE: RE: I have

Message 17514 in response to message 17513

Quote:
Quote:
Quote:
I have noticed that results in a quorum often vary widely in claimed credit. (An example is shown in this WU - http://einsteinathome.org/workunit/2258857.) Notice that one result (mine) claims 107.61 credit with only 32,160.40 cpu sec while another claims only 67.66 credits but used a lot more time - 39,204.44 cpu sec. Is this a "Benchmarking" issue or is there some other explanation?

Stick,

Long story short - Your benchmarks are nearly twice what the other has, and so your claimed credit/crunchtime ratio is nearly twice as high, also.

So, if I understand this correctly, the other guy's computer was supposedly benchmarked at a time when it was also busy doing something else (and therefore got a low score) but it crunched its WU at a time when it wasn't so busy. I didn't notice this to begin with, but the other computer is listed as having 2 cpu's. I wonder if that could have anything to do with it. That is, could there be a bug/flaw in the benchmarking process that doesn't account for multiple cpu's properly?

All CPUs benchmark differently, determined by their speed and other factors (architecture, etc). The other computer lists as 2 AMDs, but not as dual-core, and not as Athlon MP, so I am at a loss there. They are either rather old (slow) processors, or they are bottlenecked by some shared resource, or, as you suggest, it may have benchmarked while under intensive use.

The benchmark process is pretty straightforward, simply measuring Dhrystones and Whetstones, as do several other apps you can find, free or otherwise, on the net.

microcraft
"The arc of history is long, but it bends toward justice" - MLK

Stick
Stick
Joined: 24 Feb 05
Posts: 790
Credit: 33119234
RAC: 2279

RE: All CPUs benchmark

Message 17515 in response to message 17514

Quote:

All CPUs benchmark differently, determined by their speed and other factors (architecture, etc). The other computer lists as 2 AMDs, but not as dual-core, and not as Athlon MP, so I am at a loss there. They are either rather old (slow) processors, or they are bottlenecked by some shared resource, or, as you suggest, it may have benchmarked while under intensive use.

The benchmark process is pretty straightforward, simply measuring Dhrystones and Whetstones, as do several other apps you can find, free or otherwise, on the net.

Michael,

Thank you for your help and explanations (both here and on the Cruncher's Corner : Automatic Benchmarking thread which I just found and read through). Now, I think I know why there was such a big difference in claimed credit in the example I cited. It's not the other computer, it's mine. A couple of weeks ago, I decided to try out one of Seti's optimized apps (which BTW cut my average Seti processing time nearly in half). While I was at it, I also installed an optimized 4.45 core client. Although I didn't "notice" any difference in operation after the change, from what I just read on the Automatic Benchmarking thread, the optimized CC yields higher benchmarking scores - thereby facilitating higher claimed credits.

Stick

Wurgl (speak^Wcrunching for Special: Off-Topic)
Wurgl (speak^Wc...
Joined: 11 Feb 05
Posts: 321
Credit: 140550008
RAC: 0

RE: Starting on 9/26/2005

Quote:
Starting on 9/26/2005 my claimed credits dropped from a typical 70+ to 58 for doing the same amount of work. Has the system been recalibrated or is this some type of bug?

Don't complain, be just happy!

here is a box which claimed ZERO credits ...

cmds
cmds
Joined: 1 Aug 05
Posts: 62
Credit: 348073
RAC: 0

He is too humble to ask for

Message 17517 in response to message 17516

He is too humble to ask for thanks!

Happy crunching
Chris
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