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kateiacy
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Re: Minnesota Crunchers

Bearcat -- One more thing. I'm finding SN2S WUs are running really slowly on the A10. I'd been running nothing but CFSW when we first got the A10 machine, and it ran those about 10% slower than my AMD Phenom II X4 910e. Now I've switched to SN2S, and the A10 is running those about twice as slowly as the 910e. I don't know whether my husband changed some settings on the machine, or whether it's the difference between Linux and Windows compilers for this science, or whether this chip hates SN2S. I'll investigate further and get back to you on that as well as the attempt at the GPU temp assessment.

Doesn't the APU processor share floating point? If it does, try crunching with 2 processes on your quad core and see if your crunching time changes. Just wondering if the bottleneck is waiting for that shared floating point operation. Or, its like you said your husband maybe changed something.

Good thought. I'll give it a try. It'll take a couple days to run enough WUs to see whether there's a real difference with just 2 cores. SN2S Wus aren't nearly as consistent in runtime as the CFSW ones were.
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Bearcat
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Re: Minnesota Crunchers

Finally broke under 400 by points. Sitting at 398 and closing in at 100 million WCG points. Starting to wonder if folks are backing off.
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kateiacy
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Re: Minnesota Crunchers

Finally broke under 400 by points. Sitting at 398 and closing in at 100 million WCG points. Starting to wonder if folks are backing off.

Congratulations!! 100 million WCG points is awesome, as is getting under 400 in ranks.

I'm happy that I'm getting close to 4000 in points rank.... tongue
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kateiacy
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smile Re: Minnesota Crunchers

Well, I'm pumped! The university Center on Aging here has an educational program for older adults. Yesterday I met with the director to discuss my offering a class on volunteer computing. Once she understood what volunteer computing (with WCG as the example) is, she was very enthusiastic. A university student and I will present the class in late March.

I'm planning on a two-session class. At the first session, we'll introduce what volunteer computing is, how easy it is to participate, and some of the projects available. If I can figure out a way to get easy wireless access for the class participants, then we'll encourage them to bring their laptops to the second session and will help them get set up with BOINC and WCG.
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Sgt.Joe
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Re: Minnesota Crunchers

Well, I'm pumped! The university Center on Aging here has an educational program for older adults. Yesterday I met with the director to discuss my offering a class on volunteer computing. Once she understood what volunteer computing (with WCG as the example) is, she was very enthusiastic. A university student and I will present the class in late March.

I'm planning on a two-session class. At the first session, we'll introduce what volunteer computing is, how easy it is to participate, and some of the projects available. If I can figure out a way to get easy wireless access for the class participants, then we'll encourage them to bring their laptops to the second session and will help them get set up with BOINC and WCG.


Great idea biggrin
Cheers
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Bearcat
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Re: Minnesota Crunchers

Congrats Kate. Hope it works out. Now that GPU crunching went main stream, if you get a chance kate, see what your temps are at please. Still not sure if I want to go with the A10 series or multilpe GPU's in one system.
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kateiacy
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Re: Minnesota Crunchers

Sorry I didn't get that checking done, Bearcat. I'll give it a go this evening. Now that there seems to be a steady supply of HCC GPU Wus, that should work out. POEM doesn't use the GPU nearly as intensively as HCC, so the temps I got with it wouldn't be very relevant.
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kateiacy
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Re: Minnesota Crunchers

Bearcat, I did get GPUtemp installed on the AMD 5700, and it runs, but the results look maybe too good to be true. It shows the GPU temp hovering around 28-30 C when the GPU is going full blast. The GPU load readings look reasonable -- staying mostly at 99% while an HCC GPU WU is running, with occasional dips presumably while data is exchanging with the CPU.

The room temp is around 70 F, so GPU going up only to around 85 F seems wrong. GPU Temp did correctly identify the GPU, though. And this machine has a full-sized desktop case, so the fan cooling may be pretty good.

I also monitored for a while with Core Temp, and the temps stayed around 42-45 C with all 4 CPU cores and the GPU going full blast (that was 3 CPU cores running their own WUs and one servicing the GPU). The bad news was that the core frequencies sometimes dropped really low - from 1800 something to 698.
I had read that this processor throttles down the CPU cores when the GPU is in heavy use so as not to exceed its TDP, and now I've seen that in action.

That explains why the SN2S WUs have been running so slowly on that machine. When we first got this machine, I was running CFSW on all 4 cores -- nothing on the GPU. Then when I got my sapphire, I switched to SN2S + POEM and the CPU slowdown occurred.

Let me know if there's anything else you want me to try for you.
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Sgt.Joe
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Re: Minnesota Crunchers

I had read that this processor throttles down the CPU cores when the GPU is in heavy use so as not to exceed its TDP, and now I've seen that in action.

Very interesting. I don't suppose there is way to disable this function ?

Cheers
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Bearcat
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Re: Minnesota Crunchers

Thanks Kate. Try looking in the power settings if you can change performance to high. If not, check your BIOS to see if there is a setting to maximize CPU frequency. Do you have a dedicated GPU in the case with the APU?
Am wondering if using a inexpensive quad core cpu, such as AMD, with multiple GPU's, would be the best bang for the buck for GPU crunching. Heck, with a APU and 2 cards installed, thats 3 GPU wu's to crunch at a time. The newer cards are pretty energy efficient to do this. Decisions decisions. Of course this would backfire if the GPU wu's dry up.

Just looked at my power settings. Anyone ever go into the advance settings? There is a spot about power state, minimum and maximum. Both are at 100%. Curious if changing that minimum to say 50% would have any effect. I don't think it would but am unsure.
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[Edit 2 times, last edit by Bearcat at Oct 12, 2012 3:29:00 AM]
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