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Message boards : Seventeen or Bust : A new record for long task

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Profile NickProject donor
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Joined: 11 Jul 11
Posts: 2075
ID: 105020
Credit: 7,862,404,126
RAC: 3,467,976
Discovered 9 mega primesFound 5 primes in the 2020 Tour de PrimesFound 2 mega primes in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de PrimesFound 3 primes in the 2022 Tour de Primes321 LLR Emerald: Earned 50,000,000 credits (50,515,691)Cullen LLR Emerald: Earned 50,000,000 credits (50,743,293)ESP LLR Emerald: Earned 50,000,000 credits (50,849,415)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,473,530)PPS LLR Emerald: Earned 50,000,000 credits (78,166,592)PSP LLR Emerald: Earned 50,000,000 credits (51,069,305)SoB LLR Emerald: Earned 50,000,000 credits (51,885,310)SR5 LLR Emerald: Earned 50,000,000 credits (50,409,361)SGS LLR Emerald: Earned 50,000,000 credits (50,445,782)TRP LLR Double Bronze: Earned 100,000,000 credits (100,402,493)Woodall LLR Emerald: Earned 50,000,000 credits (75,425,462)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,380,527)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (744,531)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,007,004)PPS Sieve Double Gold: Earned 500,000,000 credits (636,648,331)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,181)AP 26/27 Double Silver: Earned 200,000,000 credits (202,222,774)GFN Double Gold: Earned 500,000,000 credits (637,023,067)WW Double Turquoise: Earned 5,000,000,000 credits (5,700,000,000)
Message 151590 - Posted: 21 Sep 2021 | 13:33:59 UTC
Last modified: 21 Sep 2021 | 13:35:30 UTC

I have whined about some tasks taking longer on my AVX512 computers - but this one!
65,489 sec FFT 3200K using 16 threads on a 10980XE
https://www.primegrid.com/result.php?resultid=1256248602
Compared to
https://www.primegrid.com/result.php?resultid=1253902931
With FFT 3360K and half the time?

Wanting to shoot electrons in the right direction.

Profile GrebulonerProject donor
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Joined: 2 Nov 09
Posts: 468
ID: 49572
Credit: 2,738,849,648
RAC: 3,597,660
Discovered 3 mega primesFound 2 primes in the 2018 Tour de PrimesFound 4 primes in the 2019 Tour de PrimesFound 3 primes in the 2020 Tour de PrimesFound 1 mega prime in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de PrimesFound 7 primes in the 2022 Tour de PrimesFound 1 mega prime in the 2022 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (46,943,088)Cullen LLR Sapphire: Earned 20,000,000 credits (22,038,566)ESP LLR Sapphire: Earned 20,000,000 credits (20,453,074)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,327,156)PPS LLR Emerald: Earned 50,000,000 credits (63,340,486)PSP LLR Sapphire: Earned 20,000,000 credits (20,571,669)SoB LLR Emerald: Earned 50,000,000 credits (50,873,282)SR5 LLR Sapphire: Earned 20,000,000 credits (23,807,284)SGS LLR Sapphire: Earned 20,000,000 credits (22,230,633)TRP LLR Sapphire: Earned 20,000,000 credits (24,211,899)Woodall LLR Sapphire: Earned 20,000,000 credits (24,238,438)321 Sieve (suspended) Emerald: Earned 50,000,000 credits (55,630,889)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,178,073)Generalized Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (56,046,594)PPS Sieve Double Gold: Earned 500,000,000 credits (521,014,891)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (9,468,384)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,076,645)AP 26/27 Double Gold: Earned 500,000,000 credits (515,101,493)GFN Double Silver: Earned 200,000,000 credits (278,220,852)WW Double Gold: Earned 500,000,000 credits (794,004,000)PSA Double Bronze: Earned 100,000,000 credits (126,200,096)
Message 151594 - Posted: 21 Sep 2021 | 16:51:50 UTC - in response to Message 151590.

I have whined about some tasks taking longer on my AVX512 computers - but this one!
65,489 sec FFT 3200K using 16 threads on a 10980XE
https://www.primegrid.com/result.php?resultid=1256248602
Compared to
https://www.primegrid.com/result.php?resultid=1253902931
With FFT 3360K and half the time?

Wanting to shoot electrons in the right direction.


It's not just you. I'm experiencing the same issue where one task with slightly different FFT is taking double or more of the time for only a smidgen more credit, also on a 10980XE. I can also confirm that my CPU's cooling is well up to snuff and it is locked in at 3.6GHz all core AVX-512 with very reasonable temps.

https://www.primegrid.com/results.php?hostid=1024816&offset=0&show_names=0&state=0&appid=13
____________
Eating more cheese on Thursdays.

Profile NickProject donor
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Joined: 11 Jul 11
Posts: 2075
ID: 105020
Credit: 7,862,404,126
RAC: 3,467,976
Discovered 9 mega primesFound 5 primes in the 2020 Tour de PrimesFound 2 mega primes in the 2020 Tour de PrimesFound 4 primes in the 2021 Tour de PrimesFound 2 mega primes in the 2021 Tour de PrimesFound 3 primes in the 2022 Tour de Primes321 LLR Emerald: Earned 50,000,000 credits (50,515,691)Cullen LLR Emerald: Earned 50,000,000 credits (50,743,293)ESP LLR Emerald: Earned 50,000,000 credits (50,849,415)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,473,530)PPS LLR Emerald: Earned 50,000,000 credits (78,166,592)PSP LLR Emerald: Earned 50,000,000 credits (51,069,305)SoB LLR Emerald: Earned 50,000,000 credits (51,885,310)SR5 LLR Emerald: Earned 50,000,000 credits (50,409,361)SGS LLR Emerald: Earned 50,000,000 credits (50,445,782)TRP LLR Double Bronze: Earned 100,000,000 credits (100,402,493)Woodall LLR Emerald: Earned 50,000,000 credits (75,425,462)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,380,527)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (744,531)Generalized Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,007,004)PPS Sieve Double Gold: Earned 500,000,000 credits (636,648,331)TRP Sieve (suspended) Bronze: Earned 10,000 credits (21,181)AP 26/27 Double Silver: Earned 200,000,000 credits (202,222,774)GFN Double Gold: Earned 500,000,000 credits (637,023,067)WW Double Turquoise: Earned 5,000,000,000 credits (5,700,000,000)
Message 151596 - Posted: 21 Sep 2021 | 20:24:58 UTC - in response to Message 151594.

And it isn't just a 10980XE, also 9980XE, 9960X
I keep my PCs cool - they all have the same case (well not the exact same one - they have their own)
When it is challenge time, I think I have been able to curse these tasks away by running them for about 2 minutes. Could it be the 2 cores running faster? It may not be a GPU interaction because this happens on my 9960X which has no GPU activity. Is there another parameter in addition to FFT? Just curiosity. I only select tasks when it is a challenge.

Message boards : Seventeen or Bust : A new record for long task

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