Receiving more credit than claimed
5 Dec 2014 21:04:49 UTC
Topic 197853
(moderation:
Boinc 7.2.42
Ubuntu 14.04
Intel 6600 CPU 2.4GHz
I came over to this project recently, when seti@home ran out of work.
Most of the tasks I've run so far have been "Gamma-ray pulsar search #4 v1.04 (FGRP4-SSE2)" which take 9 or 10 hours to run, and most claim about 300 units of credit.
However, they all have been granted 693 units.
The past few days, I'm starting to receive "Gravitational Wave search S6Bucket Follow-up #1 v1.06 (SSE2)" tasks, which take quite a bit longer, and claim between 320 and 350 units.
Although they're each being granted differing amounts of credit, they're all more than claimed, upwards of 400.
In each case, the other user who's processing the same work unit is receiving a similar larger than claimed credit.
Is there a reason for this generosity in granting credit for completed tasks? Is this some sort of newcomer welcome bonus?
Receiving more credit than claimed
)
Yes and No.
The reason is simple: Einstein knows how much work each WU contains, and grants credit based on this information. How long it takes your host to complete the WUs is your matter entirely. The claimed credits are simply ignored, because the system is quote broken anyway: it's based on some benchmark which is not the actual scientific application of any project, hence the performance seen in the benchmark (from which the claimed credits are calculated) is not necessarily related to crunching performance at all. The factor of 2 difference which you observe is actually pretty good for such a method ;)
MrS
Scanning for our furry friends since Jan 2002
As ET stated, Einstein does a
)
As ET stated, Einstein does a fixed credit per project because they do a pre-calculation of the work done. They could remove the claimed credit column, because it is not needed.
The granted credit is not always larger. I am doing Binary Radio Pulsar Search (Arecibo) v1.43 (NEON) and I claim somewhere between 70 and 110, but only get 62.50 per unit.
The time doesn't matter here, because the internal flops of the units are the same, that's why there is a static granted credit.