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Message boards : Generalized Fermat Prime Search : GeneferOpenCL for ATI: How much interest is there?

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Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 52163 - Posted: 27 Mar 2012 | 23:53:08 UTC

With the recent release of the GTX 680 -- and its utterly underwhelming double precision performance -- I've been thinking about porting GeneferCUDA to OpenCL.

Porting it to OpenCL and running it on NVIDIA would probably be pretty straightforward. Getting it to run on ATI would be somewhat more complex. Getting it to run quickly and efficiently on ATI might be significantly more complicated.

But ATI might be the way to go, if NVIDIA is intent on crippling the DP performance of their GeForce cards in order to protect their Tesla sales. Ironically, I think they may simply drive their would-be Tesla customers over to team Red.

Anyway, I'm going to look into this OpenCL stuff and possibly start on a port. How may people with double precision ATI cards would be interested in running GeneferOpenCL? This would require significant user testing since I don't have an ATI GPU to test with.
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PPS LLR Silver: Earned 100,000 credits (227,770)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,169,730)PPS Sieve Turquoise: Earned 5,000,000 credits (8,808,423)TRP Sieve (suspended) Bronze: Earned 10,000 credits (17,004)GFN Jade: Earned 10,000,000 credits (14,075,598)
Message 52165 - Posted: 28 Mar 2012 | 0:01:46 UTC

If you need a tester, I'd be happy to help. I have an ATI HD4870 (I believe, either that or 4850) and would be happy to help test the OpenCL application.

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321 LLR Silver: Earned 100,000 credits (346,575)Cullen LLR Silver: Earned 100,000 credits (119,890)PPS LLR Amethyst: Earned 1,000,000 credits (1,149,242)PSP LLR Silver: Earned 100,000 credits (161,710)SoB LLR Bronze: Earned 10,000 credits (13,000)SGS LLR Gold: Earned 500,000 credits (633,326)TRP LLR Silver: Earned 100,000 credits (224,572)Woodall LLR Silver: Earned 100,000 credits (275,235)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,879,611)PPS Sieve Sapphire: Earned 20,000,000 credits (27,663,307)GFN Gold: Earned 500,000 credits (638,284)PSA Ruby: Earned 2,000,000 credits (4,600,255)
Message 52166 - Posted: 28 Mar 2012 | 0:08:12 UTC

I like both approaches you mention. As a point of interest, were there to be ATI OpenCL support, I'd migrate to a 7970 over a workstation NV card. I was planning on purchasing a 680 to replace my 570, but will now wait to see where this initiative might lead.

Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 52170 - Posted: 28 Mar 2012 | 1:10:14 UTC - in response to Message 52166.
Last modified: 28 Mar 2012 | 1:11:47 UTC

I like both approaches you mention. As a point of interest, were there to be ATI OpenCL support, I'd migrate to a 7970 over a workstation NV card. I was planning on purchasing a 680 to replace my 570, but will now wait to see where this initiative might lead.


If GFN is primarily what you're interested in, I would opt for the 580 instead of the 680 since he 680 is slower.

I have no idea yet how long this will take, or even if it will happen. Therefore, I wouldn't base your purchase decision on my thinking about maybe, sometime, writing an application for hardware I don't own. :)
____________
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321 LLR Bronze: Earned 10,000 credits (13,022)Cullen LLR Bronze: Earned 10,000 credits (10,455)ESP LLR Bronze: Earned 10,000 credits (17,261)PPS LLR Bronze: Earned 10,000 credits (40,984)PSP LLR Gold: Earned 500,000 credits (547,988)SoB LLR Gold: Earned 500,000 credits (822,367)SGS LLR Bronze: Earned 10,000 credits (10,477)TRP LLR Gold: Earned 500,000 credits (510,102)Woodall LLR Bronze: Earned 10,000 credits (16,233)321 Sieve Bronze: Earned 10,000 credits (21,376)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (21,514)PPS Sieve Turquoise: Earned 5,000,000 credits (7,542,090)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (322,345)TRP Sieve (suspended) Bronze: Earned 10,000 credits (27,055)AP 26/27 Silver: Earned 100,000 credits (208,155)PSA Bronze: Earned 10,000 credits (33,391)
Message 52171 - Posted: 28 Mar 2012 | 3:45:47 UTC

I can help test with a hd5870, and would like to run GeneferOpenCL

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321 LLR Turquoise: Earned 5,000,000 credits (8,621,121)Cullen LLR Ruby: Earned 2,000,000 credits (4,950,887)ESP LLR Gold: Earned 500,000 credits (663,102)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,153,582)PPS LLR Turquoise: Earned 5,000,000 credits (5,148,031)PSP LLR Jade: Earned 10,000,000 credits (10,328,524)SoB LLR Turquoise: Earned 5,000,000 credits (8,005,312)SR5 LLR Ruby: Earned 2,000,000 credits (4,333,965)SGS LLR Ruby: Earned 2,000,000 credits (3,448,025)TRP LLR Turquoise: Earned 5,000,000 credits (9,490,291)Woodall LLR Ruby: Earned 2,000,000 credits (3,099,078)321 Sieve Gold: Earned 500,000 credits (616,637)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (21,417,361)PPS Sieve Double Gold: Earned 500,000,000 credits (719,295,164)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,113,744)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,887,407)AP 26/27 Sapphire: Earned 20,000,000 credits (30,160,780)GFN Double Bronze: Earned 100,000,000 credits (164,396,481)PSA Emerald: Earned 50,000,000 credits (51,112,166)
Message 52172 - Posted: 28 Mar 2012 | 3:54:20 UTC - in response to Message 52171.

Hi
I will do some testing with 4 6970 and a couple of 7970s
Open CL is the way to go!
Cheers
Ross*
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Eliminated 1 conjecture "k"321 LLR Turquoise: Earned 5,000,000 credits (5,005,512)Cullen LLR Turquoise: Earned 5,000,000 credits (5,014,519)ESP LLR Turquoise: Earned 5,000,000 credits (5,076,956)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (28,669,000)PPS LLR Turquoise: Earned 5,000,000 credits (5,005,087)PSP LLR Turquoise: Earned 5,000,000 credits (5,016,050)SoB LLR Turquoise: Earned 5,000,000 credits (5,013,831)SR5 LLR Jade: Earned 10,000,000 credits (10,974,187)SGS LLR Turquoise: Earned 5,000,000 credits (5,076,722)TRP LLR Turquoise: Earned 5,000,000 credits (5,412,265)Woodall LLR Turquoise: Earned 5,000,000 credits (5,018,004)321 Sieve Ruby: Earned 2,000,000 credits (2,312,621)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,969,265)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,000,094)PPS Sieve Emerald: Earned 50,000,000 credits (51,368,787)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,001,345)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,224,085)AP 26/27 Sapphire: Earned 20,000,000 credits (25,288,965)GFN Sapphire: Earned 20,000,000 credits (39,205,178)PSA Sapphire: Earned 20,000,000 credits (28,861,785)
Message 52176 - Posted: 28 Mar 2012 | 5:47:52 UTC - in response to Message 52172.

me to,
have a HD5870

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Discovered 5 mega primesEliminated 3 conjecture "k"sFound 2 primes in the 2018 Tour de PrimesFound 1 prime in the 2018 Tour de Primes Mountain Stage2019 Tour de Primes largest primeFound 4 primes in the 2019 Tour de PrimesFound 1 mega prime in the 2019 Tour de PrimesFound 1 prime in the 2019 Tour de Primes Mountain Stage321 LLR Emerald: Earned 50,000,000 credits (50,556,284)Cullen LLR Sapphire: Earned 20,000,000 credits (48,333,336)ESP LLR Sapphire: Earned 20,000,000 credits (22,668,198)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (50,309,119)PPS LLR Emerald: Earned 50,000,000 credits (81,141,206)PSP LLR Sapphire: Earned 20,000,000 credits (23,462,639)SoB LLR Emerald: Earned 50,000,000 credits (67,865,553)SR5 LLR Emerald: Earned 50,000,000 credits (50,320,316)SGS LLR Sapphire: Earned 20,000,000 credits (22,598,870)TPS LLR (retired) Bronze: Earned 10,000 credits (43,033)TRP LLR Emerald: Earned 50,000,000 credits (57,441,313)Woodall LLR Sapphire: Earned 20,000,000 credits (27,534,884)321 Sieve Sapphire: Earned 20,000,000 credits (24,560,842)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,142,109)Generalized Cullen/Woodall Sieve Emerald: Earned 50,000,000 credits (50,504,945)PPS Sieve Double Gold: Earned 500,000,000 credits (504,377,255)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,288,222)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,149,354)AP 26/27 Double Bronze: Earned 100,000,000 credits (176,624,105)GFN Double Gold: Earned 500,000,000 credits (614,303,774)PSA Double Gold: Earned 500,000,000 credits (531,236,492)
Message 52178 - Posted: 28 Mar 2012 | 9:34:03 UTC

Sure, go ahead, 7950 ready for testing.
____________
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321 LLR Silver: Earned 100,000 credits (101,692)Cullen LLR Silver: Earned 100,000 credits (104,876)ESP LLR Silver: Earned 100,000 credits (101,979)PPS LLR Silver: Earned 100,000 credits (148,018)PSP LLR Silver: Earned 100,000 credits (140,441)SoB LLR Silver: Earned 100,000 credits (119,475)SR5 LLR Silver: Earned 100,000 credits (120,939)SGS LLR Silver: Earned 100,000 credits (122,783)TRP LLR Silver: Earned 100,000 credits (100,115)Woodall LLR Silver: Earned 100,000 credits (107,459)321 Sieve Silver: Earned 100,000 credits (202,757)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,908,135)PPS Sieve Sapphire: Earned 20,000,000 credits (25,450,104)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (130,966)TRP Sieve (suspended) Silver: Earned 100,000 credits (201,525)AP 26/27 Silver: Earned 100,000 credits (100,015)GFN Silver: Earned 100,000 credits (246,369)PSA Silver: Earned 100,000 credits (226,594)
Message 52185 - Posted: 28 Mar 2012 | 17:25:29 UTC - in response to Message 52165.

If you need a tester, I'd be happy to help. I have an ATI HD4870 (I believe, either that or 4850) and would be happy to help test the OpenCL application.

If AMD has not changed their OpenCL engagement for the HD4000 series, then you have only beta support for OpenCL.
I suggest to stay on an older driver version (APP-driver) or at least an older SDK. The newer SDK versions bring only support for OpenCL and no Brook/CAL-support.

On the other side is the HD4000 series not good suited for OpenCL, means lousy performance in comparison to HD5000 and newer. Maybe this is the root cause for the beta state of the HD4000 series in OpenCL calculations.
____________
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Discovered 24 mega primesEliminated 1 conjecture "k"Found 3 primes in the 2018 Tour de PrimesFound 2 mega primes in the 2018 Tour de Primes2019 Tour de Primes highest prime scoreFound 4 primes in the 2019 Tour de PrimesFound 1 mega prime in the 2019 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (40,123,542)Cullen LLR Jade: Earned 10,000,000 credits (12,048,927)ESP LLR Sapphire: Earned 20,000,000 credits (40,003,507)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (45,815,726)PPS LLR Double Silver: Earned 200,000,000 credits (244,063,459)PSP LLR Sapphire: Earned 20,000,000 credits (36,206,048)SoB LLR Emerald: Earned 50,000,000 credits (58,077,507)SR5 LLR Sapphire: Earned 20,000,000 credits (29,215,459)SGS LLR Jade: Earned 10,000,000 credits (14,755,915)TRP LLR Sapphire: Earned 20,000,000 credits (49,012,758)Woodall LLR Jade: Earned 10,000,000 credits (13,880,115)321 Sieve Silver: Earned 100,000 credits (200,282)Cullen/Woodall Sieve (suspended) Turquoise: Earned 5,000,000 credits (6,081,963)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (13,723,448)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,111,509,432)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (14,372,149)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (11,393,528)AP 26/27 Sapphire: Earned 20,000,000 credits (20,598,860)GFN Double Amethyst: Earned 1,000,000,000 credits (1,167,639,862)PSA Double Silver: Earned 200,000,000 credits (226,139,676)
Message 52207 - Posted: 28 Mar 2012 | 20:34:27 UTC

hi HD7970 ready

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Eliminated 1 conjecture "k"Found 1 prime in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (7,698,294)Cullen LLR Turquoise: Earned 5,000,000 credits (6,655,866)ESP LLR Turquoise: Earned 5,000,000 credits (8,198,062)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,817,032)PPS LLR Jade: Earned 10,000,000 credits (10,016,096)PSP LLR Jade: Earned 10,000,000 credits (10,891,779)SoB LLR Jade: Earned 10,000,000 credits (11,111,741)SR5 LLR Turquoise: Earned 5,000,000 credits (7,278,494)SGS LLR Turquoise: Earned 5,000,000 credits (7,457,856)TRP LLR Turquoise: Earned 5,000,000 credits (7,714,186)Woodall LLR Turquoise: Earned 5,000,000 credits (5,726,778)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,094,130)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (11,628,594)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,040,865,445)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,235,150)TRP Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,376,844)AP 26/27 Jade: Earned 10,000,000 credits (11,615,539)GFN Double Silver: Earned 200,000,000 credits (427,593,017)PSA Double Bronze: Earned 100,000,000 credits (125,462,363)
Message 52209 - Posted: 28 Mar 2012 | 21:01:41 UTC

I've got two 5830s and a 1GB memory 4850 for testing.

Using OpenCL my 4850 takes just over 3 times longer at Donate@Home and 2 .5 times longer at Milky Way then my 5830s. Collatz takes just under twice as long with their CAL app. Milky Way's old Brooke/CAL app would take about twice as long too, but now is a little slower with OpenCL. So yeah, HD4000 series does suffer more from OpenCL.

NM*
____________
Largest Primes to Date:
As Double Checker: SR5 109208*5^1816285+1 Dgts-1,269,534
As Initial Finder: SR5 243944*5^1258576-1 Dgts-879,713


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Discovered 8 mega primesEliminated 2 conjecture "k"sDiscovered 2 AP26sDiscovered 1 twin prime2017 Tour de Primes highest prime count2017 Tour de Primes most Mountain Stage primes2018 Tour de Primes most Mountain Stage primesFound 4 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 4 primes in the 2018 Tour de Primes Mountain StageFound 1 mega prime in the 2018 Tour de Primes Mountain StageFound 1 prime in the 2019 Tour de PrimesFound 1 mega prime in the 2019 Tour de Primes321 LLR Emerald: Earned 50,000,000 credits (52,964,603)Cullen LLR Emerald: Earned 50,000,000 credits (58,024,172)ESP LLR Emerald: Earned 50,000,000 credits (53,384,998)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (80,870,183)PPS LLR Double Bronze: Earned 100,000,000 credits (108,743,530)PSP LLR Emerald: Earned 50,000,000 credits (51,603,689)SoB LLR Double Silver: Earned 200,000,000 credits (227,162,653)SR5 LLR Emerald: Earned 50,000,000 credits (67,207,513)SGS LLR Emerald: Earned 50,000,000 credits (55,734,444)TRP LLR Double Bronze: Earned 100,000,000 credits (121,641,577)Woodall LLR Emerald: Earned 50,000,000 credits (58,962,100)321 Sieve Double Bronze: Earned 100,000,000 credits (101,250,415)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (30,879,764)Generalized Cullen/Woodall Sieve Double Bronze: Earned 100,000,000 credits (100,428,955)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (3,008,139,439)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Bronze: Earned 100,000,000 credits (101,857,516)TRP Sieve (suspended) Emerald: Earned 50,000,000 credits (50,936,081)AP 26/27 Double Gold: Earned 500,000,000 credits (868,108,917)GFN Double Ruby: Earned 2,000,000,000 credits (3,989,827,069)PSA Double Turquoise: Earned 5,000,000,000 credits (5,435,455,200)
Message 52217 - Posted: 28 Mar 2012 | 23:23:00 UTC

One 5850 available for testing.

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Discovered 1 Fermat divisor321 LLR Amethyst: Earned 1,000,000 credits (1,044,451)Cullen LLR Amethyst: Earned 1,000,000 credits (1,012,570)PPS LLR Ruby: Earned 2,000,000 credits (2,818,774)PSP LLR Silver: Earned 100,000 credits (123,174)SoB LLR Jade: Earned 10,000,000 credits (18,119,601)SR5 LLR Gold: Earned 500,000 credits (519,595)SGS LLR Turquoise: Earned 5,000,000 credits (9,292,019)TRP LLR Amethyst: Earned 1,000,000 credits (1,552,511)Woodall LLR Silver: Earned 100,000 credits (296,881)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,218,011)PPS Sieve Emerald: Earned 50,000,000 credits (63,008,001)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Gold: Earned 500,000 credits (884,469)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,608,252)GFN Turquoise: Earned 5,000,000 credits (8,987,537)PSA Ruby: Earned 2,000,000 credits (3,077,926)
Message 52225 - Posted: 29 Mar 2012 | 11:07:57 UTC

my dual gpu 6990 is always available for extensive testing!
____________

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Message 52260 - Posted: 29 Mar 2012 | 20:49:16 UTC - in response to Message 52225.

One 6850 with 1 GB of memory ready for testing :)

____________
271643232^131072+1 GENERALIZED FERMAT :)
93*10^1029523-1 REPDIGIT PRIME
31*332^367560+1 CRUS PRIME
Proud member of team Aggie The Pew. Go Aggie!

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Message 52262 - Posted: 29 Mar 2012 | 22:29:48 UTC

I have an HD5x00 ready to go, I can't remember exactly what it is and I am at work at the moment.
____________
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Message 52283 - Posted: 30 Mar 2012 | 12:06:41 UTC
Last modified: 30 Mar 2012 | 12:08:11 UTC

Two Radeon HD 7950s, Two Radeon HD 6850s, and one Radeon HD 4870. It is a mistake to not support AMD and OpenCL from the getgo. MilkyWay@Home and POEM@Home greatly benefit from the superior AMD performance over NVIDIA cards, and the sheer number of bitminers with 10-100+ AMD GPUs may easily opt in if they feel the need to donate cycles. Just look at those nice hashrates.

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 52286 - Posted: 30 Mar 2012 | 13:11:33 UTC - in response to Message 52283.

It is a mistake to not support AMD and OpenCL from the getgo.


Not a mistake, but definitely unfortunate. In addition to the reasons you stated, being limited to double precision Nvidia GPUs almost precludes any Mac computers from participating.

As for supporting XYZ from the beginning, that's not the way things work here. There's no CEO to decide "We're going to do THIS. You, over there, make it happen." The person with the idea to create an application is usually a developer in his spare time at home, who then goes and creates the application. Sometime after that, a discussion may occur regarding whether it's an appropriate application to crunch at PrimeGrid.

Generally speaking, that developer is going to write the software to run on whatever hardware they personally own. In this case, the developer of GeneferCUDA owned an Nvidia GPU, so that's what he wrote it for.

To get an application for another platform requires either another person to develop the software (nobody has volunteered), or for one of the existing developers to write the software without having an actual AMD GPU to run the code on. That's what I'm considering doing.

It will be interesting to see how well this goes, since I don't have an AMD GPU to test with. At best, it will be a long process.

____________
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Message 52287 - Posted: 30 Mar 2012 | 13:25:19 UTC - in response to Message 52286.
Last modified: 30 Mar 2012 | 13:26:00 UTC

It is a mistake to not support AMD and OpenCL from the getgo.


Not a mistake, but definitely unfortunate. In addition to the reasons you stated, being limited to double precision Nvidia GPUs almost precludes any Mac computers from participating.

As for supporting XYZ from the beginning, that's not the way things work here. There's no CEO to decide "We're going to do THIS. You, over there, make it happen." The person with the idea to create an application is usually a developer in his spare time at home, who then goes and creates the application. Sometime after that, a discussion may occur regarding whether it's an appropriate application to crunch at PrimeGrid.

Generally speaking, that developer is going to write the software to run on whatever hardware they personally own. In this case, the developer of GeneferCUDA owned an Nvidia GPU, so that's what he wrote it for.

To get an application for another platform requires either another person to develop the software (nobody has volunteered), or for one of the existing developers to write the software without having an actual AMD GPU to run the code on. That's what I'm considering doing.

It will be interesting to see how well this goes, since I don't have an AMD GPU to test with. At best, it will be a long process.



Maybe I have an idea for you to get your hands on a card, without having to buy it. Maybe one of the people offering their cards to test is willing to allow you access to their system using SSH or something similar for windows. That way you have access to a card, without having to buy it.

If I would've had such a card I would have gladly given you access, unfortunately I'm running an nVidia card and don't much feel like going out and spending a couple of hundred bucks on second gpu ;)
____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)

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Message 52295 - Posted: 30 Mar 2012 | 20:44:39 UTC

TeamViewer and nothing more needed. ;)

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Message 52329 - Posted: 31 Mar 2012 | 23:44:25 UTC
Last modified: 31 Mar 2012 | 23:44:57 UTC

If AMD has not changed their OpenCL engagement for the HD4000 series, then you have only beta support for OpenCL.
I suggest to stay on an older driver version (APP-driver) or at least an older SDK. The newer SDK versions bring only support for OpenCL and no Brook/CAL-support.

On the other side is the HD4000 series not good suited for OpenCL, means lousy performance in comparison to HD5000 and newer. Maybe this is the root cause for the beta state of the HD4000 series in OpenCL calculations.


I've been using my ATI card for OpenCL calculations for quite some time. The performance of the card is generally half as fast as my 550GTX Ti, so it is a bit slow.

Since no beta application will be likely released for this for a while, I might even upgrade beforehand.

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Message 52487 - Posted: 2 Apr 2012 | 17:27:53 UTC

One 6470 with 1 GB available for testing!
____________

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Message 53001 - Posted: 14 Apr 2012 | 9:53:11 UTC

Hello there,

although I've been browsing this forum for a while now, this is only my very first post here.

I would like to emphasize the fact that the new AMD "Tahiti" cards are really, theoretically, powerful when speaking of DP computation : with an o/c 7970, you can reach 1TFlops just for DP calculations !

This is why I believe, regardless of how many people showed interest here, it would be a benefit on the long term to develop an OpenCL version of the Genefer client.

Of course, I do know it's not something you can do in a blink of an eye, but nevertheless it's something worth considering...not to mention that the next GK110 might be still crippled to death, rendering the full Kepler generation useless for GeneferCUDA, and making an OpenCL version waaaaaaay more efficient.

Kudos to all PG team anyway.

MasterSam. [currently with an HD5850, considering an HD7970 for the summer]

PS : as English is not my mother tongue, please forgive any mistake I could have made previously.

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Message 53003 - Posted: 14 Apr 2012 | 11:28:36 UTC
Last modified: 14 Apr 2012 | 11:30:12 UTC

Crunch-Chi and Menipe: Just to let you know, the 6470 and 6850 cards aren't DP, unfortunately. I'm in the same boat with one of my PCs, as it has a 6670 - just about the fastest completely silent card I could get at the time, but I forgot to check whether it was DP-capable or not.

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Message 53041 - Posted: 15 Apr 2012 | 11:20:00 UTC

2x 5850 awaiting GeneferOpenCL.

Will be adding 7970 when Ivy becomes available locally; hopefully 2 more weeks.

All the best.

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Message 53087 - Posted: 16 Apr 2012 | 9:44:28 UTC

OK, I have a lot of R7970. Michael, when do we start? ;)
____________

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Message 53104 - Posted: 16 Apr 2012 | 16:22:26 UTC - in response to Message 53087.

@Robert:

We know.

Lots of 7970 - mad credits over at DTRG. :)

____________

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Message 53787 - Posted: 3 May 2012 | 22:59:28 UTC

Okay, have a new 6850 ready for testing the OpenCL... runs a lot better than my 4870. :P

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Message 54762 - Posted: 20 May 2012 | 20:59:42 UTC

Is DP really necessary? No way to do a rewrite for SP? My card is not fast, it is a HD5450 passiv cooling. But it is still faster then CPU and has 1gb memory.

Christoph
____________
Greetings, Christoph

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Message 54779 - Posted: 21 May 2012 | 16:53:29 UTC
Last modified: 21 May 2012 | 16:53:55 UTC

As explained to me by Michael Goetz:

Technically, no, this could be done with single precision, but the FFT size would be at least twice as big (maybe more than that since the mantissa in single precision is LESS than half the size of the mantissa in double precision), so the FFTs would be a lot slower.




The current ATI-OpenCL plan is to continue to use DP.
____________

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Message 54915 - Posted: 24 May 2012 | 9:49:38 UTC - in response to Message 54779.

Ok, thank you. So I have to wait till I can afford a better GPU.
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Message 55774 - Posted: 22 Jun 2012 | 9:17:42 UTC

Well if someone gives me the code for the GeneferCUDA I can see if I can port it over and probably have a device I could test it on as well. New laptop came with 7670m ATI graphics card. :)
Note: I will not give a definite yes it would work or no it will not work I will TRY TO GET IT TO WORK ONLY. If it does than I have nothing to complain if it doesn't there goes my time.
Btw I will only have limited testing since I DO NOT WANT MY CARD DAMAGED. USE AT YOUR OWN RISK. If you do decide to download and when I release a beta or pre-alpha well consider your self fortunate that there is one. For OpenCL.

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Message 55780 - Posted: 22 Jun 2012 | 9:55:32 UTC - in response to Message 55774.

Well if someone gives me the code for the GeneferCUDA I can see if I can port it over and probably have a device I could test it on as well. New laptop came with 7670m ATI graphics card. :)
Note: I will not give a definite yes it would work or no it will not work I will TRY TO GET IT TO WORK ONLY. If it does than I have nothing to complain if it doesn't there goes my time.
Btw I will only have limited testing since I DO NOT WANT MY CARD DAMAGED. USE AT YOUR OWN RISK. If you do decide to download and when I release a beta or pre-alpha well consider your self fortunate that there is one. For OpenCL.


https://subversion.assembla.com/svn/genefer/


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Message 55781 - Posted: 22 Jun 2012 | 9:59:08 UTC - in response to Message 55780.

Is there one for linux I can see it unfortunately

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Message 55783 - Posted: 22 Jun 2012 | 10:04:48 UTC - in response to Message 55781.

Is there one for linux I can see it unfortunately


That source code builds Genefer80, Genefer, GenefX64, and GeneferCUDA for Windows, Linux, and MacIntel.

You can build all 12 builds from the repository.
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Message 55812 - Posted: 23 Jun 2012 | 9:49:37 UTC - in response to Message 55783.


That source code builds Genefer80, Genefer, GenefX64, and GeneferCUDA for Windows, Linux, and MacIntel.

Which part of it is difficult to port to opencl, is it the use of the cudafft?

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Message 55818 - Posted: 23 Jun 2012 | 11:48:01 UTC - in response to Message 55812.


That source code builds Genefer80, Genefer, GenefX64, and GeneferCUDA for Windows, Linux, and MacIntel.

Which part of it is difficult to port to opencl, is it the use of the cudafft?


I'm not sure anyone has said porting it to OpenCl is difficult -- in fact, from what I could see it looks rather straightforward.

ATI has their own FFT library, so that shouldn't be a problem either.

Probably the difficult part would be optimizing the code for ATI's GPUs. A very slow ATI wouldn't be much of an advantage. The reason I haven't attempted it because I don't own an ATI GPU, nor a computer I could easily put one into even if I had one.


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Message 55922 - Posted: 26 Jun 2012 | 22:44:41 UTC - in response to Message 55818.

I'm not sure anyone has said porting it to OpenCl is difficult -- in fact, from what I could see it looks rather straightforward.

I think its is difficult to create an opencl application, now I said it :s


ATI has their own FFT library, so that shouldn't be a problem either.

Does it work on intel/nvidia hardware?

Probably the difficult part would be optimizing the code for ATI's GPUs. A very slow ATI wouldn't be much of an advantage. The reason I haven't attempted it because I don't own an ATI GPU, nor a computer I could easily put one into even if I had one.

I started looking around, found the following website, http://www.bealto.com/gpu-fft2_real-type.html, but I cannot determine its value. Also building for opencl is difficult. I succeeded creating an vector add though.... Maybe that is a start :)

But maybe you are right in creating an ATI specific version, why not use CAL?

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Message 55928 - Posted: 27 Jun 2012 | 2:06:22 UTC - in response to Message 55922.

But maybe you are right in creating an ATI specific version, why not use CAL?


CAL is deprecated and not really supported anymore.

The best bet is probably to write in OpenCL for both cards -- but understanding that you'll still probably have to write two versions of the code anyway, and possibly need two different development environments as well.

But not having actually one it, I'd take my words with a huge grain of salt.
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Message 55941 - Posted: 27 Jun 2012 | 12:39:55 UTC - in response to Message 55922.

I'm not sure anyone has said porting it to OpenCl is difficult -- in fact, from what I could see it looks rather straightforward.

I think its is difficult to create an opencl application, now I said it :s


I disagree on that. If you know how to program, it isn't that difficult. Optimizing OpenCL code (parallelizing) is the hard part.

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Message 55950 - Posted: 27 Jun 2012 | 16:53:34 UTC - in response to Message 55941.

I'm not sure anyone has said porting it to OpenCl is difficult -- in fact, from what I could see it looks rather straightforward.

I think its is difficult to create an opencl application, now I said it :s


I disagree on that. If you know how to program, it isn't that difficult. Optimizing OpenCL code (parallelizing) is the hard part.


Created a simple OpenCL application yesterday. It was not that difficult but it doesn't do much :) (adding two arrays of floats together)

While searching the web for help I found some interesting things like:
- the cl kernels are compiled runtime ...
- the ati fft library doesn't work well on nvidia gpu's ...
- you can develop with the ati sdk and run them on nvidia cpu ...

I also tested the wwwwcl application on nvidia. How did you manage to create one without a cl file?

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Message 55952 - Posted: 27 Jun 2012 | 18:04:15 UTC - in response to Message 55950.

I'm not sure anyone has said porting it to OpenCl is difficult -- in fact, from what I could see it looks rather straightforward.

I think its is difficult to create an opencl application, now I said it :s


I disagree on that. If you know how to program, it isn't that difficult. Optimizing OpenCL code (parallelizing) is the hard part.


Created a simple OpenCL application yesterday. It was not that difficult but it doesn't do much :) (adding two arrays of floats together)

While searching the web for help I found some interesting things like:
- the cl kernels are compiled runtime ...
- the ati fft library doesn't work well on nvidia gpu's ...
- you can develop with the ati sdk and run them on nvidia cpu ...

I also tested the wwwwcl application on nvidia. How did you manage to create one without a cl file?


There is a perl script (included in the source) that converts the .cl file to a .h file. It basically creates one lengthy null-terminated string from the input.

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Message 56066 - Posted: 3 Jul 2012 | 7:28:33 UTC
Last modified: 3 Jul 2012 | 7:31:42 UTC

actually when writing opencl the devices on the tutorials have it to run on all computing devices so you don't need to write one for Nvidia and one for ATi, you can write one for both under one code and under one library.
BTW I am at 8% completion of the code expecting it in November after studies and other assorted events. :)
BTW I am 14. :D

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Message 56138 - Posted: 5 Jul 2012 | 7:03:23 UTC
Last modified: 5 Jul 2012 | 7:21:27 UTC

ok update the coding has been slowed down by my ATi card burning out and I have to replace it so it will now halt until I can replace it so I can continue with testing section by section of the code as I write it.
Ok might have found out why it burned out. I need to refine my C programming skills and other areas.
Now effectively pushed to at least January 2013

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Message 56178 - Posted: 7 Jul 2012 | 11:45:03 UTC - in response to Message 55952.
Last modified: 7 Jul 2012 | 11:45:24 UTC

There is a perl script (included in the source) that converts the .cl file to a .h file. It basically creates one lengthy null-terminated string from the input.


Thanks for pointing that out. I continued with that website that shows how to create radix-N kernels. I have a simple example running that calculates the FFT for an input of length 8, but I dont know if it is correct. (though it shows the same results as the fftw and cufft references)

Input array in[0]={ 1, 0 } in[1]={ 2, 0 } in[2]={ 6, 0 } in[3]={ 5, 0 } in[4]={ 48, 0 } in[5]={ 6, 0 } in[6]={ 5, 0 } in[7]={ 2, 0 } Out array out[0]={ 75, 0 } out[1]={ -51.9497, -0.292893 } out[2]={ 38, -1 } out[3]={ -42.0503, 1.70711 } out[4]={ 45, 0 } out[5]={ -42.0503, -1.70711 } out[6]={ 38, 1 } out[7]={ -51.9497, 0.292893 }

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Message 56724 - Posted: 26 Jul 2012 | 13:58:34 UTC

I've an AMD 6950 which is collecting dust at the moment.
Should there be an alpha release ready, I could install the card and test it.
But don't expect any help with programming from me, HTML and a little bit of java is as far as my knowledge about programming goes.

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Message 56755 - Posted: 29 Jul 2012 | 4:49:54 UTC - in response to Message 56724.

Well there won't be one until I can stop making my burn up. It somehow sets on fire. :( And that is the last I am buying. I officially quit......

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Message 57305 - Posted: 26 Aug 2012 | 12:34:59 UTC

Is there anyone still working on a Genefer OpenCL app for Ati/AMD? If so what's the status?

NM*
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As Double Checker: SR5 109208*5^1816285+1 Dgts-1,269,534
As Initial Finder: SR5 243944*5^1258576-1 Dgts-879,713


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Message 57311 - Posted: 26 Aug 2012 | 14:28:01 UTC - in response to Message 57305.

Is there anyone still working on a Genefer OpenCL app for Ati/AMD? If so what's the status?


Unfortunately, it doesn't look like anyone is working on it right now.
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Message 58101 - Posted: 5 Oct 2012 | 22:40:58 UTC

Unfortunately, it doesn't look like anyone is working on it right now.


Was any progress made? I now have a 7970 ready for any OpenCL testing.

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Message 58103 - Posted: 6 Oct 2012 | 0:28:08 UTC - in response to Message 58101.

Nothing has changed.
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Message 58122 - Posted: 6 Oct 2012 | 17:56:30 UTC

Sad to hear. Did you lose interest? OpenCL would be a valuable port. CUDA is going downhill, as you pointed out yourself.

If writing the new program is straightforward, but boring, then I'd be happy to pitch in time to help with actual coding. We can port it without parallelism for NVIDIA and then worry about optimization as it proceeds forward. Of course, under me, the end result would be optimized only for later series ATI cards.

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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 58123 - Posted: 6 Oct 2012 | 18:55:18 UTC - in response to Message 58122.

Sad to hear. Did you lose interest?


I don't have an ATI GPU. Furthermore, I don't have a computer with a 64 bit AMD CPU, so I can't run AMD's OpenCL on a CPU either.
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Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 13 mega primesEliminated 7 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 1 Fermat divisor2012 Tour de Primes highest prime count2012 Tour de Primes most Mountain Stage primes2015 Tour de Primes highest prime count2016 Tour de Primes highest prime countFound 23 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 2 primes in the 2018 Tour de Primes Mountain Stage2019 Tour de Primes highest prime countFound 22 primes in the 2019 Tour de Primes321 LLR Double Bronze: Earned 100,000,000 credits (100,829,118)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,870,990)ESP LLR Double Bronze: Earned 100,000,000 credits (103,603,483)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (108,461,080)PPS LLR Double Silver: Earned 200,000,000 credits (339,247,040)PSP LLR Double Bronze: Earned 100,000,000 credits (108,003,110)SoB LLR Double Bronze: Earned 100,000,000 credits (135,747,083)SR5 LLR Double Bronze: Earned 100,000,000 credits (175,267,447)SGS LLR Double Bronze: Earned 100,000,000 credits (160,088,881)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Bronze: Earned 100,000,000 credits (121,443,822)Woodall LLR Double Bronze: Earned 100,000,000 credits (101,447,725)321 Sieve Double Silver: Earned 200,000,000 credits (203,510,966)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve Double Silver: Earned 200,000,000 credits (285,139,652)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,107,644,468)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Silver: Earned 200,000,000 credits (203,523,358)TRP Sieve (suspended) Double Silver: Earned 200,000,000 credits (201,489,157)AP 26/27 Double Bronze: Earned 100,000,000 credits (119,562,131)GFN Double Amethyst: Earned 1,000,000,000 credits (1,170,370,549)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 58125 - Posted: 6 Oct 2012 | 19:21:47 UTC - in response to Message 58122.

... CUDA is going downhill, as you pointed out yourself...


I do not recall Mike saying that CUDA was an issue, only that NVidia had opted for a lower double precision capability in the Kepler cards. Are you suggesting that CUDA is being dropped (as did AMD with the CAL/Brook+ code for their cards)?

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Message 58126 - Posted: 6 Oct 2012 | 19:44:37 UTC - in response to Message 58125.

I'd like to point out the the impetus for developing an openCL version of Genefer was and is entirely due to a desire to allow AMD GPUs to run this project. That desire exists regardless of how good or bad any other platform might be.
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Message 58133 - Posted: 7 Oct 2012 | 3:17:09 UTC

I don't have an ATI GPU. Furthermore, I don't have a computer with a 64 bit AMD CPU, so I can't run AMD's OpenCL on a CPU either.


I know. I was the first to speak up about the idea of rigorous testing because you didn't have any such parts.

OpenCL is able to be run on NVIDIA cards with or without an AMD processor involved, but porting it over to ATI cards will be a pain without the native hardware.

I do not recall Mike saying that CUDA was an issue, only that NVidia had opted for a lower double precision capability in the Kepler cards. Are you suggesting that CUDA is being dropped (as did AMD with the CAL/Brook+ code for their cards)?


Sorry, I mislead you with that statement. What I meant to say was that the latest NVIDIA cards have poor CUDA performance (unless they are from the Tesla series, in which case they have amazing performance). OpenCL performance, however, is higher with these cards when comparing the 600 series with the 500.

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Message 58134 - Posted: 7 Oct 2012 | 4:33:19 UTC - in response to Message 58133.
Last modified: 7 Oct 2012 | 4:42:05 UTC

... What I meant to say was that the latest NVIDIA cards have poor CUDA performance (unless they are from the Tesla series, in which case they have amazing performance). OpenCL performance, however, is higher with these cards when comparing the 600 series with the 500.


Uh, pretty much everything in that paragraph is completely wrong. I'm afraid you may have misunderstood some of what's been said.

What I meant to say was that the latest NVIDIA cards have poor CUDA performance


The Kepler cards have GREAT CUDA performance. What they are poor at is double precision arithmetic. They are excellent at sieving, for example. Just not Genefer (or LLR), which use double precision math.

(unless they are from the Tesla series, in which case they have amazing performance)


Oddly enough, Tesla cards seem to have worse performance than the consumer GeForce GPUs. Go figure. Everyone expected the Tesla cards to be incredible crunching machines -- but they're not.

OpenCL performance, however, is higher with these cards when comparing the 600 series with the 500.


As for OpenCL, the 600 series cards will perform with OpenCL exactly the same as they will with CUDA. They're exceptionally fast, unless you're doing double precision math. If you're doing double precision in OpenCL on a 680, it will be the same 20% slower than the 580.
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Message 58159 - Posted: 8 Oct 2012 | 5:56:30 UTC

Yikes, I guess I did misunderstand what you were saying. Although, with a number of different projects, 680 CUDA < 580 CUDA < 680 OpenCL. I think they are just weird cards.

I've never purchased a Tesla GPU thankfully. It's disappointing that they don't really do that well.

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Message 58162 - Posted: 8 Oct 2012 | 10:58:47 UTC - in response to Message 58159.


I've never purchased a Tesla GPU thankfully. It's disappointing that they don't really do that well.


Well...maybe. The issue wit the Tesla (and high end Quadro) is that NVidia drastically lowers all the clocks (25%-50% lower), which more than overwhelms the double-precision boost. They do this because these cards are made for high end computation with effort to minimizes any errors (Thus, the ECC RAM used on these cards). Given the extreme costs (and frankly, lousing stock cooling) of these cards, pushing the clocks to see the real performance boost is hard to justify and unlikely to see.

That said, I may have an opportunity to see what can be done with the Tesla as a research group here is getting some in for a machine in the next month or so and, knowing what I do here, have asked if I can "stress test" their cards for a few days before they apply them to their research. <<insert evil grin here>>



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Message 58164 - Posted: 8 Oct 2012 | 12:29:29 UTC - in response to Message 58162.

That said, I may have an opportunity to see what can be done with the Tesla as a research group here is getting some in for a machine in the next month or so and, knowing what I do here, have asked if I can "stress test" their cards for a few days before they apply them to their research. <<insert evil grin here>>


That's an interesting opportunity.

Here's a hypothesis: The computation errors we see are caused by video memory errors.

That makes some sense because the errors seem to be more sensitive to memory clock changes than to GPU/shader clock changes.

If that's correct, the ECC ram might eliminate the errors completely, at least single bit errors. You might be able to increase the memory clock rate significantly without breaking Genefer.

On the other hand, I'm at a loss to explain why Genefer would be affected by a memory error like that more than other applications.

I wonder if there's any way to find out the error correction rate on the ECC ram. Typically, that kind of hardware doesn't record correctable errors, but I haven't worked with that kind of stuff indecades and things might have changed.
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Message 58180 - Posted: 8 Oct 2012 | 20:43:56 UTC

I would love to have more prime searches for ATI cards. The more Prime Searches for ATI, the merrier.

I would willing to beta test with a 7850.

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Message 58192 - Posted: 9 Oct 2012 | 14:46:38 UTC

That said, I may have an opportunity to see what can be done with the Tesla as a research group here is getting some in for a machine in the next month or so and, knowing what I do here, have asked if I can "stress test" their cards for a few days before they apply them to their research. <<insert evil grin here>


Oooh. :D
Let us know if and when you do these "stress tests." I'd like to see the results.

Here's a hypothesis: The computation errors we see are caused by video memory errors.

That makes some sense because the errors seem to be more sensitive to memory clock changes than to GPU/shader clock changes.


The late 500 series "Ti" cards are proof of that, I think. I believe it was you who I spoke to about my former Genefer card inducing lots of errors (however, that system also had a bad piece of RAM in it previously that caused BSoDs, so it might not be limited to that). Since then, using a 580 has only caused errors when the (very rare) crash occurs from improper drivers.

On the other hand, I'm at a loss to explain why Genefer would be affected by a memory error like that more than other applications.


Perhaps double-precision computing requires a greater use of video memory?

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Message 58200 - Posted: 9 Oct 2012 | 17:08:13 UTC - in response to Message 58192.


On the other hand, I'm at a loss to explain why Genefer would be affected by a memory error like that more than other applications.


Perhaps double-precision computing requires a greater use of video memory?



Probably not in this case. For example, the Wieferich and Wall-Sun-Sun searches on PRPnet use single precision but actually have quite high memory usage without these kinds of errors. My guess is that Genefer is highly sensitive to memory timing issues, or conversely, has a typical sensitivity to memory timings of most applications (though more than single precison especially when it comes to rounding errors), but VRAM is subject to more memory errors than standard RAM perhaps due to higher clocking/timing. In other words, DDR3 is just making its way to the CPU architecture over the last year or two, but video RAM has been available in GDDR5 for about that same time. Thus, GPU manufacturers may be allowing a higher error rate than do CPU makers to get the faster VRAM into production since demand is for more FPS in gaming with little concern for an errant pixel or two that flash on the screen for a second or two here and there in the game. The ECC on the Tesla cards (with slower clocks) is built to avoid these errors in scientific work rather than gaming, and thus, may provide a good test for this hypothesis regarding the errors...as Mike suggested.

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Message 58262 - Posted: 12 Oct 2012 | 18:07:47 UTC - in response to Message 58162.


That said, I may have an opportunity to see what can be done with the Tesla as a research group here is getting some in for a machine in the next month or so and, knowing what I do here, have asked if I can "stress test" their cards for a few days before they apply them to their research. <<insert evil grin here>>

Are they getting the new K20s? They should be fast in double precision compared to the 600 series.

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Message 58264 - Posted: 12 Oct 2012 | 20:15:38 UTC - in response to Message 58262.


That said, I may have an opportunity to see what can be done with the Tesla as a research group here is getting some in for a machine in the next month or so and, knowing what I do here, have asked if I can "stress test" their cards for a few days before they apply them to their research. <<insert evil grin here>>

Are they getting the new K20s? They should be fast in double precision compared to the 600 series.


Nope...I think they are getting 4 of the K10s. I'll have to check , though. Their rack is in, but the board and GPUs are still going through the university's purchasing bureaucracy.

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Message 58296 - Posted: 14 Oct 2012 | 9:37:46 UTC - in response to Message 58264.


That said, I may have an opportunity to see what can be done with the Tesla as a research group here is getting some in for a machine in the next month or so and, knowing what I do here, have asked if I can "stress test" their cards for a few days before they apply them to their research. <<insert evil grin here>>

Are they getting the new K20s? They should be fast in double precision compared to the 600 series.


Nope...I think they are getting 4 of the K10s. I'll have to check , though. Their rack is in, but the board and GPUs are still going through the university's purchasing bureaucracy.



The K10 is also a nice card if you do not need the double precision performance that GFN needs. Good luck with the bureaucracy.

Nvidia announces Tesla K10 and K20 GPUs

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Message 60912 - Posted: 1 Jan 2013 | 6:43:08 UTC

Hopefully I get the OpenCL coding done before the race/challenge, it is now compiling and I will test with my Nvidia 9300M GS card when I randomly select one of the tasks that come to the CPU and let it do that and I will submit that CPU when it is done on the GPU.
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 60930 - Posted: 1 Jan 2013 | 13:14:08 UTC - in response to Message 60912.

Hopefully I get the OpenCL coding done before the race/challenge, it is now compiling and I will test with my Nvidia 9300M GS card when I randomly select one of the tasks that come to the CPU and let it do that and I will submit that CPU when it is done on the GPU.


Don't rush it. Even if you had fully working and tested code, there's no way it could be put in production before the challenge.
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Message 60958 - Posted: 2 Jan 2013 | 1:21:34 UTC
Last modified: 2 Jan 2013 | 1:23:41 UTC

Well I tested it and I got the result and compared it with my manual calculations and the result is not the same. I tested it one of the old WU so it won't appear in the database so the WU is 16541^569386+1 and the result came back non-matching so there is something I misplaced or miscalculated in the code so I have to revise it and then retest with the same WU. See ya all while I try the manual calculations again
EDIT: Oops I mistyped and didn't put 1 in front of the 6 so it should look like this: 16541^569386+1
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 60961 - Posted: 2 Jan 2013 | 1:48:31 UTC - in response to Message 60958.

Well I tested it and I got the result and compared it with my manual calculations and the result is not the same. I tested it one of the old WU so it won't appear in the database so the WU is 16541^569386+1 and the result came back non-matching so there is something I misplaced or miscalculated in the code so I have to revise it and then retest with the same WU. See ya all while I try the manual calculations again
EDIT: Oops I mistyped and didn't put 1 in front of the 6 so it should look like this: 16541^569386+1



That is not a valid GFN and the Genefer algorithm can not test that number. If you tried to run that through any variant of Genefer, it should immediately detect that this is not a GFN because 569386 is not a power of two and abort the calculation. Also, b must be even:

C:\PRPNet\prpclient-5.0.8-windows-gpu\prpclient-1-gpu>genefer -q "16541^569386+1" genefer 2.3.0-0 (WINDOWS x86 32-bit) Copyright 2001-2003, Yves Gallot Copyright 2009, Mark Rodenkirch, David Underbakke Copyright 2010-2012, Shoichiro Yamada, Ken Brazier Copyright 2011-2012, Iain Bethune, Michael Goetz, Ronald Schneider Command line: genefer -q 16541^569386+1 Priority change succeeded. Cannot test. b is odd, thus b^m+1 is odd. C:\PRPNet\prpclient-5.0.8-windows-gpu\prpclient-1-gpu>genefer -q "16542^569386+1" genefer 2.3.0-0 (WINDOWS x86 32-bit) Copyright 2001-2003, Yves Gallot Copyright 2009, Mark Rodenkirch, David Underbakke Copyright 2010-2012, Shoichiro Yamada, Ken Brazier Copyright 2011-2012, Iain Bethune, Michael Goetz, Ronald Schneider Command line: genefer -q 16542^569386+1 Priority change succeeded. Cannot test. m is not a power of 2.

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Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

Kiska
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Joined: 13 Apr 12
Posts: 47
ID: 138397
Credit: 17,708,498
RAC: 10,683
321 LLR Silver: Earned 100,000 credits (247,170)Cullen LLR Silver: Earned 100,000 credits (116,382)ESP LLR Bronze: Earned 10,000 credits (20,281)PPS LLR Silver: Earned 100,000 credits (181,960)PSP LLR Bronze: Earned 10,000 credits (41,231)SoB LLR Silver: Earned 100,000 credits (458,390)SR5 LLR Silver: Earned 100,000 credits (279,600)SGS LLR Silver: Earned 100,000 credits (246,706)TRP LLR Silver: Earned 100,000 credits (130,323)Woodall LLR Bronze: Earned 10,000 credits (15,204)Generalized Cullen/Woodall Sieve Amethyst: Earned 1,000,000 credits (1,530,367)PPS Sieve Turquoise: Earned 5,000,000 credits (5,841,943)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,347,045)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,103,794)AP 26/27 Silver: Earned 100,000 credits (141,505)GFN Amethyst: Earned 1,000,000 credits (1,960,894)PSA Bronze: Earned 10,000 credits (44,611)
Message 60965 - Posted: 2 Jan 2013 | 2:47:30 UTC - in response to Message 60961.
Last modified: 2 Jan 2013 | 2:51:03 UTC

Problem is that when I tested that number it gave back a result, when I translated the code to OpenCL I sort of ignored some lines that I determined detrimental for the computations, so I just snipped and cutted them out. I tried one of the numbers that is proved to be a prime: 40734^262144+1 and I looked at the result for that old WU and I seem to type things wrong for some reason unless I copy and paste I get it wrong, here it is: 20234^212142+1. Both gave back an answer and I believe they are correct the proven prime I don't need to check but the other one needs to be checked for confirmation that it is so more manual calculations.
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 prime in the 2019 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,063,182)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,145,754)PPS LLR Ruby: Earned 2,000,000 credits (2,768,012)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (34,034,802)SR5 LLR Turquoise: Earned 5,000,000 credits (8,180,910)SGS LLR Ruby: Earned 2,000,000 credits (2,011,264)TRP LLR Ruby: Earned 2,000,000 credits (2,737,347)Woodall LLR Ruby: Earned 2,000,000 credits (2,195,123)321 Sieve Ruby: Earned 2,000,000 credits (4,828,383)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (5,059,304)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (7,090,096)GFN Emerald: Earned 50,000,000 credits (64,586,585)PSA Jade: Earned 10,000,000 credits (10,135,447)
Message 60969 - Posted: 2 Jan 2013 | 3:42:46 UTC - in response to Message 60965.

Problem is that when I tested that number it gave back a result, when I translated the code to OpenCL I sort of ignored some lines that I determined detrimental for the computations, so I just snipped and cutted them out. I tried one of the numbers that is proved to be a prime: 40734^262144+1 and I looked at the result for that old WU and I seem to type things wrong for some reason unless I copy and paste I get it wrong, here it is: 20234^212142+1. Both gave back an answer and I believe they are correct the proven prime I don't need to check but the other one needs to be checked for confirmation that it is so more manual calculations.



20234^212142+1 also isn't a GFN and should be rejected by the Genefer program. N must be a power of 2, such as 262144.

Assuming you've only changed the code that does the math, and left the surrounding framework intact, the best way to check if the program is doing the calculations correctly is to run with the -t (test) and -r (residual) switches. These will, respectively, run the program against a set of known prime and known composite numbers, and verifies that the results are as expected.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!

My lucky number is 75898524288+1

Kiska
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Joined: 13 Apr 12
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321 LLR Silver: Earned 100,000 credits (247,170)Cullen LLR Silver: Earned 100,000 credits (116,382)ESP LLR Bronze: Earned 10,000 credits (20,281)PPS LLR Silver: Earned 100,000 credits (181,960)PSP LLR Bronze: Earned 10,000 credits (41,231)SoB LLR Silver: Earned 100,000 credits (458,390)SR5 LLR Silver: Earned 100,000 credits (279,600)SGS LLR Silver: Earned 100,000 credits (246,706)TRP LLR Silver: Earned 100,000 credits (130,323)Woodall LLR Bronze: Earned 10,000 credits (15,204)Generalized Cullen/Woodall Sieve Amethyst: Earned 1,000,000 credits (1,530,367)PPS Sieve Turquoise: Earned 5,000,000 credits (5,841,943)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,347,045)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,103,794)AP 26/27 Silver: Earned 100,000 credits (141,505)GFN Amethyst: Earned 1,000,000 credits (1,960,894)PSA Bronze: Earned 10,000 credits (44,611)
Message 60972 - Posted: 2 Jan 2013 | 6:40:18 UTC - in response to Message 60969.
Last modified: 2 Jan 2013 | 6:45:15 UTC

Problem is that when I tested that number it gave back a result, when I translated the code to OpenCL I sort of ignored some lines that I determined detrimental for the computations, so I just snipped and cutted them out. I tried one of the numbers that is proved to be a prime: 40734^262144+1 and I looked at the result for that old WU and I seem to type things wrong for some reason unless I copy and paste I get it wrong, here it is: 20234^212142+1. Both gave back an answer and I believe they are correct the proven prime I don't need to check but the other one needs to be checked for confirmation that it is so more manual calculations.



20234^212142+1 also isn't a GFN and should be rejected by the Genefer program. N must be a power of 2, such as 262144.

Assuming you've only changed the code that does the math, and left the surrounding framework intact, the best way to check if the program is doing the calculations correctly is to run with the -t (test) and -r (residual) switches. These will, respectively, run the program against a set of known prime and known composite numbers, and verifies that the results are as expected.

whoops that means I changed alot of the code to meet the OpenCL standards I'll just retranslate it and should be able to detect these errors. Also I don't understand the math involved I just translate the code. So that maybe why I chuck irregular numbers and expect a result. :(
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321 LLR Silver: Earned 100,000 credits (102,413)Cullen LLR Silver: Earned 100,000 credits (111,491)ESP LLR Bronze: Earned 10,000 credits (12,283)PPS LLR Silver: Earned 100,000 credits (113,688)PSP LLR Silver: Earned 100,000 credits (121,711)SoB LLR Silver: Earned 100,000 credits (132,062)SR5 LLR Bronze: Earned 10,000 credits (41,014)SGS LLR Bronze: Earned 10,000 credits (28,778)TRP LLR Bronze: Earned 10,000 credits (18,951)Woodall LLR Silver: Earned 100,000 credits (105,643)PPS Sieve Sapphire: Earned 20,000,000 credits (41,379,025)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (11,081)TRP Sieve (suspended) Bronze: Earned 10,000 credits (41,456)GFN Turquoise: Earned 5,000,000 credits (9,137,128)
Message 65456 - Posted: 17 May 2013 | 4:15:53 UTC

Responding to the original post in this thread, I am HIGHLY interested in a being able to do Genefer with my ATI card. I'm not sure where we're at with this as I only read maybe 1/5 of the few hundred posts on this thread now, so I apologize if I'm covering old ground.

I bought my GTX680s and then sadly discovered afterward that they aren't up to the task for DP projects. I then decided to upgrade the ATI card on my other PC so that I could do more DP projects with it, thinking this may be one of my main projects for that card. I knew I had done a lot of PPS Sieve tasks with my HD6950 and thought my new HD7950 would be able to handle those and the Genefer tasks. I then sadly discovered Genefer is CUDA only.

Any support for ATI cards would surely get my support. As it is, my AMD/ATI PC runs Milkyway 24/7 since it seems to have the best support for ATI cards that I've found. I would be very willing to throw it into this project if I were able to.

Message boards : Generalized Fermat Prime Search : GeneferOpenCL for ATI: How much interest is there?

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