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Message 8665 - Posted: 5 Feb 2005, 10:24:36 UTC

Hi there, I'm new to CP. Until now I've only been participating by SETI.
I'm wondering if the system of validation is the same here and there. By SETI you process a WU and then it's compared with 2 more users, and the middle is taken as granted credit. Is the same here, or do you get the amount of credit that you claime?
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Message 8666 - Posted: 5 Feb 2005, 10:47:59 UTC

Hello and welcome!

The system is different.
The WUs are much bigger, and they 'trickle' intermediate results every now and than. To be precise, every (CPU-time per WU) divided by 72, because they trickle 72 times. On my machine here (the AMD) thats about 0,9 times a day (I run S@H and PP@H as well)

The amount of credit for each trickle is always the same (94,5).
There seems to be some kind os validation, because it sometimes lasts a few minutes from uploading to granting, but just a few minutes.

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Message 8673 - Posted: 5 Feb 2005, 11:15:38 UTC

There may me a hour before credit is granted but you always get the credit claimed. The same WU can generate different results due to different maths libraries being used and this is compounded by the butterfly effect. The experiment was designed to cope with this butterfly effect/chaos in the weather.
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Message 8686 - Posted: 5 Feb 2005, 16:00:36 UTC

So if I understand this 1 trickle is about 1.4% of whole WU ?
And how long does it take you to finish one trickle, and later a WU. Please answer me in hours. Thanks
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Message 8687 - Posted: 5 Feb 2005, 16:12:16 UTC - in response to Message 8686.  
Last modified: 5 Feb 2005, 16:14:22 UTC

> So if I understand this 1 trickle is about 1.4% of whole WU ?
> And how long does it take you to finish one trickle, and later a WU. Please
> answer me in hours. Thanks

On my machine:
<i>CPU type</i> AuthenticAMD AMD Athlon(tm) XP 2200+
<i>Number of CPUs</i> 1
<i>Operating System</i> Microsoft Windows XP Professional Edition, Service Pack 1, (05.01.2600.00)
<i>Memory</i> 511.48 MB
<i>Cache</i> 976.56 KB
<i>Swap space</i> 1248.5 MB
<i>Total disk space</i> 23.52 GB
<i>Free Disk Space</i> 18.36 GB
<i>Measured floating point speed</i> 1680.7 million ops/sec
<i>Measured integer speed</i> 3997.9 million ops/sec

it takes about 14h CPU-time per trickle.
That was as long as I just crunched S@H and CPDN nearly once a day, now it's a wee bit less.
But I changed the preferences a bit to CPDN, so I'll still be close;-)
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Message 8689 - Posted: 5 Feb 2005, 17:03:48 UTC

So far my AMD XP2800+ 220MB of RAM proccesed 0,48% of WU. Time taken: 8h 35min
Is this normal?
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Message 8693 - Posted: 5 Feb 2005, 18:23:36 UTC - in response to Message 8689.  

&gt; So far my AMD XP2800+ 220MB of RAM proccesed 0,48% of WU. Time taken: 8h
&gt; 35min
&gt; Is this normal?

Perhaps I should wait until some of the wiser wizzards say something, but AFAIK crunching time is depenidng on CPU-type and RAM.
You've got a faster CPU but less RAM.
I need about 14h for 1,39%, so I guess, you're fine, and RAM is important;-)

Disclaimer: I'm neither developer nor otherwise insider, just browsed the fora for some time!
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Message 8695 - Posted: 5 Feb 2005, 19:39:50 UTC

Well, it's not a desktop, it's a laptop, wich means I have an AMD mobile. That's also the main reason for less ram.My desktop is an AMD XP2600+ with 512 MB RAM.
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Message 8864 - Posted: 7 Feb 2005, 20:56:16 UTC - in response to Message 8689.  

&gt; So far my AMD XP2800+ 220MB of RAM proccesed 0,48% of WU. Time taken: 8h
&gt; 35min
&gt; Is this normal?

I can't say if that's typical for your hardware, but you've now sent back your first trickle. Calculating from your average timesteps per second it took 25h 43m of CPU time.
"The ultimate test of a moral society is the kind of world that it leaves to its children." - Dietrich Bonhoeffer
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