Message boards :
Number crunching :
Credits Given per WU
Message board moderation
Author | Message |
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Luke Send message Joined: 31 Dec 06 Posts: 2546 Credit: 817,560 RAC: 0 |
Hi Everyone I do not seem to understand how credit is given per every WU... I have also done a bit of searching through my pending credit and have discovered these main types of WU's: 19 credits = seem to be shorter WU's running in at about 500-100 seconds on my machine. 50 credits = Running in @ 2500-3300 seconds. 52 credits = Appear to be the same as WU's with 50 given credits. 63 credits = Takes about 4000-4500 seconds. 78 credits = Takes the same time as WU's with 63 given credits... Not all of this seems to match up by time, is there another factor involved that determines the outcome and granted credit? Luke. - Luke. |
W-K 666 Send message Joined: 18 May 99 Posts: 19064 Credit: 40,757,560 RAC: 67 |
The thread Estimates and Deadlines Revisited will maybe give you some insight into the non-lineararity of the AR/CR curve. Credits are calculated from the number of Floating Point operations (FPops or FLops) performed to process the unit. But FLops are not equal, think difficulty Add and Multiply Versus Divide and Sqrt. Also the processing performed at different AR's is different, e.g. Gaussians are only looked for in the central part of the AR curve. |
Luke Send message Joined: 31 Dec 06 Posts: 2546 Credit: 817,560 RAC: 0 |
The thread Estimates and Deadlines Revisited will maybe give you some insight into the non-lineararity of the AR/CR curve. Thanks for the thread WinterKnight.... Luke. - Luke. |
W-K 666 Send message Joined: 18 May 99 Posts: 19064 Credit: 40,757,560 RAC: 67 |
Another link, to another of Joe's post, Variation in Requested Credit |
Clyde C. Phillips, III Send message Joined: 2 Aug 00 Posts: 1851 Credit: 5,955,047 RAC: 0 |
The object to the game is to get constant credits per hour, provided that the processor is giving full devotion to Seti (or other Boinc projects). Unfortunately that's impossible because it's harder to perform some types of flops than others. But, I see, at least for my machines, that credit-per-hour has been more constant the past couple of months, maybe since I had started using Alex Kan's cruncher. It looks like the high-credit workunits (like 75 to 100) and the low credit units (like 12 to 19) give the most credit-per-hour now. It used to be that the 25-to-30 credit units gave poor credit per hour. That's not true anymore. Results may be different with other (like AMD) processors. |
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