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Message boards : Number crunching : Running 2 WU in 1 GPU (GTX560)

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juan BFB
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321 LLR Bronze: Earned 10,000 credits (56,085)Cullen LLR Bronze: Earned 10,000 credits (14,986)PPS LLR Bronze: Earned 10,000 credits (81,754)PSP LLR Bronze: Earned 10,000 credits (30,405)SGS LLR Bronze: Earned 10,000 credits (81,505)TRP LLR Bronze: Earned 10,000 credits (42,404)321 Sieve (suspended) Bronze: Earned 10,000 credits (10,852)Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,357,143)PPS Sieve Sapphire: Earned 20,000,000 credits (43,461,155)TRP Sieve (suspended) Bronze: Earned 10,000 credits (48,716)
Message 40130 - Posted: 8 Sep 2011 | 7:42:23 UTC

Is possible to run 2 WU at the same time in one GTX560?



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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 (suspended) 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 40131 - Posted: 8 Sep 2011 | 8:25:21 UTC - in response to Message 40130.

Yes, you need an App_info file for this.
Inside the xml search for:

<coproc>
<type>CUDA</type>
<count>1.0</count>
</coproc>
...and change it to:
<coproc>
<type>CUDA</type>
<count>0.5</count>
</coproc>

____________
Best wishes. Knowledge is power. by jjwhalen

juan BFB
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321 LLR Bronze: Earned 10,000 credits (56,085)Cullen LLR Bronze: Earned 10,000 credits (14,986)PPS LLR Bronze: Earned 10,000 credits (81,754)PSP LLR Bronze: Earned 10,000 credits (30,405)SGS LLR Bronze: Earned 10,000 credits (81,505)TRP LLR Bronze: Earned 10,000 credits (42,404)321 Sieve (suspended) Bronze: Earned 10,000 credits (10,852)Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,357,143)PPS Sieve Sapphire: Earned 20,000,000 credits (43,461,155)TRP Sieve (suspended) Bronze: Earned 10,000 credits (48,716)
Message 40154 - Posted: 8 Sep 2011 | 16:54:50 UTC

Thanks for the help.

Do you know if running 2 WU in the same GTX450 realy makes diference in PrimeGrid like it does for example in Seti (+/- 50% increase in RAC)?



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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 (suspended) 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 40167 - Posted: 9 Sep 2011 | 0:13:32 UTC - in response to Message 40154.

The parallel calculation of two units can result in a shorter runtime compared to the calculation one after one. It depends of the power of your GPU...
Please try it out and post your result.
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Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,893,273)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (9,648,951)PSP LLR Turquoise: Earned 5,000,000 credits (5,653,927)SoB LLR Jade: Earned 10,000,000 credits (10,558,341)SR5 LLR Turquoise: Earned 5,000,000 credits (5,748,705)SGS LLR Ruby: Earned 2,000,000 credits (3,335,713)TRP LLR Jade: Earned 10,000,000 credits (12,602,818)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve (suspended) Gold: Earned 500,000 credits (740,566)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,673,938)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (43,842,888)GFN Double Silver: Earned 200,000,000 credits (224,648,943)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 40172 - Posted: 9 Sep 2011 | 6:56:35 UTC
Last modified: 9 Sep 2011 | 6:57:25 UTC

I tried a similar experiment, but one which is not directly applicable to the original question because I used two different apps. But hopefully the result will be interesting in its own right. Instead of going the app_info route, I continued to run 1 PPS Sieve WU at a time, one after the other, as usual. Simultaneously, I ran 1 PRPnet GeneferCUDA 262144 task. Note, this is one sieve and one primality test at the same time on one GPU.

Results:

- My PRPnet GeneferCUDA time was almost exactly double what it normally is when run solo. Maybe even just a tad slower than that.
- My PPS Sieve (cuda) WUs have been very steady between 700 and 705 seconds each. During the time GeneferCUDA was running, I had times between 1233-1236 seconds each. Note that PPS Sieve (cuda) uses less than 10% of a CPU (hyper)thread on average. GeneferCUDA uses 100% of a thread.
- I did not notice any significant change in the thermal state of the GPU or CPU or MB.
- Interactive screen response was noticeably more laggy when both were running as opposed to PPS Sieve alone. I don't recall how the responsiveness is when running only GeneferCUDA, so I can't comment on that.

Setup: GTX570 @ 786/2100/1572, per factory. i7 2600K, moderate o/c.

I await news from anyone who runs two sieves via app_info. I generally avoid messing around at that level, but if called for I could take one for the team (Go AtP!)

--Gary
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"I am he as you are he as you are me and we are all together"

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Message 40199 - Posted: 9 Sep 2011 | 23:18:27 UTC - in response to Message 40172.

Gary, i posted some times in the thread run times with a GT440 and later this day (saturday in europe...) i will post new times for a GTS450 eco-version.

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Message 40204 - Posted: 10 Sep 2011 | 6:36:25 UTC

My experience is that the GPU's are kept at a constant 99-100% usage when running either of the sieve jobs. Even when run one at a time.

Doubling up tasks will probably just cause resource contention on the card and may negatively impact cache performance.

Other projects, which frequently do not use 100% of the GPU, it may help to double up the tasks in order to take advantage of the otherwise wasted processing power. One of the MilkyWay apps was like that for me. However, the sieves seem to be very efficient at keeping the GPU running at full load.

My recommendation, for this project, is that you not double up tasks on a GPU.

Even my slow core2 duo can keep a GTX560 busy at 100% GPU usage while crunching other LLR tasks on both CPU cores without a problem.

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Message 40210 - Posted: 10 Sep 2011 | 11:22:16 UTC - in response to Message 40199.

I will test this too on my new GTS450 "eco" later this day.
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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)ESP LLR Ruby: Earned 2,000,000 credits (2,115,978)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,114,360)PPS LLR Ruby: Earned 2,000,000 credits (3,693,420)PSP LLR Ruby: Earned 2,000,000 credits (2,104,190)SoB LLR Sapphire: Earned 20,000,000 credits (20,553,515)SR5 LLR Amethyst: Earned 1,000,000 credits (1,005,730)SGS LLR Turquoise: Earned 5,000,000 credits (9,417,467)TRP LLR Amethyst: Earned 1,000,000 credits (1,552,511)Woodall LLR Ruby: Earned 2,000,000 credits (2,120,819)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,218,011)PPS Sieve Emerald: Earned 50,000,000 credits (65,785,705)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)AP 26/27 Turquoise: Earned 5,000,000 credits (5,025,449)GFN Jade: Earned 10,000,000 credits (10,075,615)WW Sapphire: Earned 20,000,000 credits (30,588,000)PSA Ruby: Earned 2,000,000 credits (3,077,926)
Message 41063 - Posted: 29 Sep 2011 | 3:22:05 UTC

Would the same principles apply to an AMD card instead of a CUDA card? :-)

Some of us are just fans of AMD GPUs, even though they don't perform nearly as well on PrimeGrid.
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Message 41077 - Posted: 29 Sep 2011 | 12:22:34 UTC
Last modified: 29 Sep 2011 | 12:30:52 UTC

Well lol when i see the load which is 98-100% i would not advise you to do that since the load is more then enough, running 2 instances for just 2% is kinda a non go for me.
The gpu is constant jumping between 98 and 100% means in my book a 100% load.
If it was under 90% i would try it, the trick is to just use this when the gpu is not fully loaded and enough percentage is not used to gain some.
The lower the load is over time say for instance the einstein app which does only give a gpu load of 40% so 2 instances is fine. Now here you would think 3 instances would work but einstein is a tricky one because it needs between 300 and 450 Mb video ram. So if your card has 1 gb ram running 3 is out of the question :D
The reason why nvidia cards perform better is because cuda is a much older and mature processing tool.
ATI came later on the gpu processing train, so they have a lot to catchup.
Our hope is that opencl will narrow the gap between them, but ofcourse nivida as being the bigger and richer probably spends more money to research and develop.

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Message 41086 - Posted: 29 Sep 2011 | 13:57:27 UTC - in response to Message 41063.

I don't know the load on an ATI/AMD-card. Try it out and post your results. ;)
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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)ESP LLR Ruby: Earned 2,000,000 credits (2,115,978)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,114,360)PPS LLR Ruby: Earned 2,000,000 credits (3,693,420)PSP LLR Ruby: Earned 2,000,000 credits (2,104,190)SoB LLR Sapphire: Earned 20,000,000 credits (20,553,515)SR5 LLR Amethyst: Earned 1,000,000 credits (1,005,730)SGS LLR Turquoise: Earned 5,000,000 credits (9,417,467)TRP LLR Amethyst: Earned 1,000,000 credits (1,552,511)Woodall LLR Ruby: Earned 2,000,000 credits (2,120,819)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,218,011)PPS Sieve Emerald: Earned 50,000,000 credits (65,785,705)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)AP 26/27 Turquoise: Earned 5,000,000 credits (5,025,449)GFN Jade: Earned 10,000,000 credits (10,075,615)WW Sapphire: Earned 20,000,000 credits (30,588,000)PSA Ruby: Earned 2,000,000 credits (3,077,926)
Message 41091 - Posted: 29 Sep 2011 | 15:10:12 UTC - in response to Message 41086.

I don't know the load on an ATI/AMD-card. Try it out and post your results. ;)


I may just do that once the challenge is over :-)

Although I think PrimeGrid is pretty good about using 100% utilization on an AMD card.

Other projects I think I could see huge benefits however though. I have a dual-gpu card (amd 6990) so it always is running two WUs already anyway, but other projects such as DNETC and some others, like to run a single WU across both GPUs. Which works most of the time, however it always seems that towards the end of a WU that one of the GPUs finished its "half" of processing first and is stuck on idle just waiting for the other GPU to finish. Splitting may be ideal..although for all I know then I'll end up with two WUs, each with half their work on each GPU. :-)
____________

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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 (suspended) 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 41198 - Posted: 30 Sep 2011 | 20:44:09 UTC - in response to Message 41091.

Although I think PrimeGrid is pretty good about using 100% utilization on an AMD card.

I think this is a mistake.
PPS-sieve was designed originally for Cuda and was for the only known basis between both vendors cross-compiled, OpenCL.
IMO, OpenCL is in the same situation like Java. Neither a native language for different hardware vendors nor the holy gral of performance, only platform independend...
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Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 55 mega primesEliminated 7 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 2 Fermat divisors2012 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 Primes2020 Tour de Primes highest prime scoreFound 21 primes in the 2020 Tour de PrimesFound 4 mega primes in the 2020 Tour de PrimesFound 8 primes in the 2021 Tour de PrimesFound 1 mega prime in the 2021 Tour de PrimesFound 21 primes in the 2022 Tour de PrimesFound 1 mega prime in the 2022 Tour de PrimesFound 2 primes in the 2022 Tour de Primes Mountain Stage321 LLR Double Silver: Earned 200,000,000 credits (222,511,049)Cullen LLR Double Silver: Earned 200,000,000 credits (201,409,561)ESP LLR Double Silver: Earned 200,000,000 credits (214,825,147)Generalized Cullen/Woodall LLR Double Silver: Earned 200,000,000 credits (204,939,647)PPS LLR Double Amethyst: Earned 1,000,000,000 credits (1,000,162,904)PSP LLR Double Silver: Earned 200,000,000 credits (201,749,918)SoB LLR Double Silver: Earned 200,000,000 credits (207,028,068)SR5 LLR Double Silver: Earned 200,000,000 credits (242,670,624)SGS LLR Double Silver: Earned 200,000,000 credits (215,395,061)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Silver: Earned 200,000,000 credits (206,215,203)Woodall LLR Double Silver: Earned 200,000,000 credits (201,651,344)321 Sieve (suspended) Double Silver: Earned 200,000,000 credits (235,451,253)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (285,139,652)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,850,838,725)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 Gold: Earned 500,000,000 credits (512,586,204)GFN Double Ruby: Earned 2,000,000,000 credits (2,497,952,831)WW Double Ruby: Earned 2,000,000,000 credits (4,425,680,000)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 41200 - Posted: 30 Sep 2011 | 21:28:41 UTC - in response to Message 41198.

Although I think PrimeGrid is pretty good about using 100% utilization on an AMD card.

I think this is a mistake.
PPS-sieve was designed originally for Cuda and was for the only known basis between both vendors cross-compiled, OpenCL.
IMO, OpenCL is in the same situation like Java. Neither a native language for different hardware vendors nor the holy gral of performance, only platform independend...


True...but even inefficient code can ultimately use the GPU at 100% (i.e., OpenCL code runs slower than CAL even at 100% utilization).


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141941*2^4299438-1 is prime!


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Posts: 1
ID: 142094
Credit: 40,330,889
RAC: 0
Cullen LLR Bronze: Earned 10,000 credits (14,964)PPS LLR Bronze: Earned 10,000 credits (87,091)SGS LLR Bronze: Earned 10,000 credits (66,855)TRP LLR Ruby: Earned 2,000,000 credits (2,488,810)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (360,832)PPS Sieve Sapphire: Earned 20,000,000 credits (31,798,643)TRP Sieve (suspended) Silver: Earned 100,000 credits (493,622)GFN Turquoise: Earned 5,000,000 credits (5,011,425)
Message 55382 - Posted: 12 Jun 2012 | 2:06:25 UTC - in response to Message 40172.

@Gary:

By what mechanism or configuration did you cause 2 WU's to run at the same time, if not with an app_info?

thx

Dave

Profile Gary Craig
Volunteer tester
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Joined: 30 Dec 09
Posts: 3213
ID: 52890
Credit: 1,005,618,748
RAC: 0
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,893,273)Cullen LLR Ruby: Earned 2,000,000 credits (2,440,687)ESP LLR Turquoise: Earned 5,000,000 credits (5,738,876)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,292,626)PPS LLR Turquoise: Earned 5,000,000 credits (9,648,951)PSP LLR Turquoise: Earned 5,000,000 credits (5,653,927)SoB LLR Jade: Earned 10,000,000 credits (10,558,341)SR5 LLR Turquoise: Earned 5,000,000 credits (5,748,705)SGS LLR Ruby: Earned 2,000,000 credits (3,335,713)TRP LLR Jade: Earned 10,000,000 credits (12,602,818)Woodall LLR Ruby: Earned 2,000,000 credits (2,282,622)321 Sieve (suspended) Gold: Earned 500,000 credits (740,566)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,143,068)PPS Sieve Double Gold: Earned 500,000,000 credits (524,673,938)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Sapphire: Earned 20,000,000 credits (43,842,888)GFN Double Silver: Earned 200,000,000 credits (224,648,943)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 55389 - Posted: 12 Jun 2012 | 10:04:11 UTC - in response to Message 55382.

@Gary:

By what mechanism or configuration did you cause 2 WU's to run at the same time, if not with an app_info?

thx

Dave

One on BOINC via the normal mechanism. The other using PRPnet. With many PRPnet instances on your machine, you could run as many as you want at the same time. It would become increasingly inefficient.

This wasn't a recommended configuration. It was just an experiment.

--Gary

Message boards : Number crunching : Running 2 WU in 1 GPU (GTX560)

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