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Message boards : The Riesel Problem : difference in credit granted

Author Message
pabliedungProject donor
Volunteer tester
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Joined: 2 Jan 11
Posts: 87
ID: 79535
Credit: 215,204,556
RAC: 1
Eliminated 1 conjecture "k"Discovered 1 Sophie Germain pair321 LLR Turquoise: Earned 5,000,000 credits (5,084,460)Cullen LLR Turquoise: Earned 5,000,000 credits (5,116,758)ESP LLR Turquoise: Earned 5,000,000 credits (5,193,429)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,066,828)PPS LLR Turquoise: Earned 5,000,000 credits (5,069,151)PSP LLR Turquoise: Earned 5,000,000 credits (5,102,730)SoB LLR Turquoise: Earned 5,000,000 credits (6,758,211)SR5 LLR Turquoise: Earned 5,000,000 credits (5,422,257)SGS LLR Turquoise: Earned 5,000,000 credits (5,063,747)TRP LLR Turquoise: Earned 5,000,000 credits (5,366,251)Woodall LLR Turquoise: Earned 5,000,000 credits (5,224,737)321 Sieve Turquoise: Earned 5,000,000 credits (5,106,170)Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,903,006)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,213)PPS Sieve Emerald: Earned 50,000,000 credits (50,293,728)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,054,382)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,057,704)AP 26/27 Turquoise: Earned 5,000,000 credits (5,061,836)GFN Sapphire: Earned 20,000,000 credits (20,168,983)PSA Emerald: Earned 50,000,000 credits (50,030,975)
Message 54012 - Posted: 6 May 2012 | 17:13:00 UTC

I have two machines each with a quad core i7 (no HT enabled) that get very different credits granted for the TRP LLR wu's:

iMac i7 - OSX 10.6
http://www.primegrid.com/workunit.php?wuid=274073519
CPU time: 49,910 seconds
Credit: 468.03

Ubuntu Linux i7
http://www.primegrid.com/workunit.php?wuid=274073509
CPU time: 47,254 seconds
Credit: 1,300

What is driving the difference in credit awarded for very similar wu's on seamingly identical CPU's?


____________

Profile j.sheridanProject donor
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Joined: 21 Mar 11
Posts: 437
ID: 91622
Credit: 679,433,675
RAC: 0
321 LLR Ruby: Earned 2,000,000 credits (3,002,360)Cullen LLR Ruby: Earned 2,000,000 credits (3,040,127)PPS LLR Ruby: Earned 2,000,000 credits (4,146,102)PSP LLR Turquoise: Earned 5,000,000 credits (5,432,836)SoB LLR Turquoise: Earned 5,000,000 credits (5,623,361)SR5 LLR Gold: Earned 500,000 credits (640,957)SGS LLR Ruby: Earned 2,000,000 credits (4,053,556)TRP LLR Ruby: Earned 2,000,000 credits (3,826,598)Woodall LLR Ruby: Earned 2,000,000 credits (3,123,627)321 Sieve Silver: Earned 100,000 credits (237,768)Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (265,102,350)PPS Sieve Double Silver: Earned 200,000,000 credits (292,642,933)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,801,812)GFN Emerald: Earned 50,000,000 credits (82,759,285)
Message 54023 - Posted: 6 May 2012 | 19:54:01 UTC - in response to Message 54012.

boinc thinks 1 pc is approx 3x faster than the other so is awarding approx 3x the credits

Linux 2.6.38-12-generic: Measured integer speed 16788.66 million ops/sec
Darwin11.3.0: Measured integer speed 5193.7 million ops/sec

Message boards : The Riesel Problem : difference in credit granted

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