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After starting CPU/SMP Folding GPU PPD cuts in half

post #1 of 7
Thread Starter 




I finally got my smp bigadv going and as soon as I started it both of my GPU's PPD cut in half. (I was getting around 35,000 total before) Any suggestions? Please and thanks

Also this sporadic gpu usage started happening after I setup SMP

Wuuuuuuuut.


Edited by derickwm - 10/24/11 at 3:22am
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post #2 of 7
it takes some cpu power to fold on the gpus and since its all based on bonus points because of how fast you fold even a 10% hit on the cpu can do alot to the ppd. i normally only fold gpu or cpu in a rig and with it being cold again its about time to start back up.
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post #3 of 7
cyanmcleod is right, you need some CPU to run the GPU client, so when running both multi-CPU and GPU client there's some contention for CPU resources. Try running only the GPU client and set the CPU affinity to one,two, three cores, etc until you see the GPU is properly fed data and the GPU clients gets to the desired 35kppd. Then start the multi-CPU client and set its affinity to the remaining CPU cores, but leave one free to be used by the OS.

This way the GPU client has all the CPU cores it needs, the OS has its core for whatever it may need it and the CPU SMP client has all the rest.
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post #4 of 7
GPUs shouldn't take a hit due to SMP Folding; it's always the other way around.

What drivers are you using for your GPUs?
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post #5 of 7
Thread Starter 
I updated to 285.62 whql last night. I let just my cpu fold all night and got around 13k ppd. Starting my GPUs back on right now.

Yup getting about 28,000 now after activating both gpus and letting my cpu continue. At this rate its not even worth it to fold on my processor. I get more from the GPUs by themselves >.>
Edited by derickwm - 10/24/11 at 12:06pm
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post #6 of 7
Can / Have you set the bigadv to use -smp 7 (i.e only use 7 threads, and leave one open to feed the GPUs)?
post #7 of 7
Thread Starter 
Quote:
Originally Posted by dragosmp View Post
cyanmcleod is right, you need some CPU to run the GPU client, so when running both multi-CPU and GPU client there's some contention for CPU resources. Try running only the GPU client and set the CPU affinity to one,two, three cores, etc until you see the GPU is properly fed data and the GPU clients gets to the desired 35kppd. Then start the multi-CPU client and set its affinity to the remaining CPU cores, but leave one free to be used by the OS.

This way the GPU client has all the CPU cores it needs, the OS has its core for whatever it may need it and the CPU SMP client has all the rest.
Quote:
Originally Posted by omega17 View Post
Can / Have you set the bigadv to use -smp 7 (i.e only use 7 threads, and leave one open to feed the GPUs)?
Thanks you two. Set the cores to use for 7 instead of 8. Getting about 43k ppd now! YAYYYYYYYYY IT FINALLY WORKS 24/7 folding here I come!

Make that 47k
Edited by derickwm - 10/24/11 at 2:21pm
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Verktøy Cu
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