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*Updated* AMD GPU Folding on 12.11 beta drivers and 13.1 WHQL drivers - Page 10

post #91 of 365
Quote:
Originally Posted by tictoc View Post

Your CPU will still be at close to 100% when set to smp-3. This is because the gpu is using one core, or roughly 25%, and the other 3 cores, or 75%, are being used to fold smp.
When you set it to smp-2 you are restricting the smp folding to 2 cores or 50%, and the gpu is using the other 30%. Thus, the 80% usage on your CPU.
The v7 client does not use core affinity locking by default and that is why you are seeing work being done on all four cores. The windows scheduler is moving the process around from core to core. I have not tried to use core affinity locking, and the folding results of parking certain workloads on certain cores seems to be mixed.
I have been folding with smp-5 for two months with no problems. smp-3 should not be a problem. It is only higher values like smp-7 that have problems with some WU's.

Ahh that must be what I was thinking of. I've seen the suggestion of going straight to smp6 with 8 threaded CPUs.

Affinity lock should help. No wasted CPU bandwidth moving the thread from core to core.
post #92 of 365
Alright so first off even though that advice was not directed at me I chose to play around with it and would like to say thank you for posting that. finally having the modded drivers installed properly and then finding that locking it to 3 cores has actually helped quite a bit ppd is now showing at about 10k
5k processor
5k gpu
(figured this out by stopping GPU while CPU was still running.)
This is roughly the number I'm seeing but it is also still leveling out.

Now the question that I have is what exactly does affinity lock do? I mean I understand the 3 cores and the gpu using one of the cores as well. (Though I may very well unlock this thing to five cores and get a little extra in XD). I know that it is probably a stupid question but I'm kinda curious
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post #93 of 365
Thread Starter 
Core affinity lock attempts to park tasks on specific cores. In normal operation tasks will be spread out over all cores, so if you were loading a quad-core cpu to 25% the load would be split between the 4 cores. Depending on the application it could run most of the tasks on one core or spread it out across all cores. If the tasks was evenly split between all cores you would see usage of 6%,6%,6%, and 7% on the individual cores.

Core affinity attempts to put all of the specified tasks on one core. With a task locked to a single core, that loads the processor to 25%, you should see 100% usage on one core and no usage on the remaining cores. This can help to speed up some tasks since there is no time lost moving the processes from core to core.

Gains are dependent upon the underlying programming of the specific tasks.
post #94 of 365
And its not just instructions bouncing around from core to core, all the data in cache and registers have to be moved as well. When SMP first came out I know there was a gain. It should be a gain as long as folding doesnt have to wait for the other concurrent threads to complete a frame/% before continuing because one core got some cycles taken away by another process.
post #95 of 365
Thank you both for the information. I had a feeling it was something like this but wanted to be certain about it. I'm probably going to leave that alone for now and work on getting a stable OC with 5/6 cores unlocked. eventually I plan on building a rig strictly for folding but until then XD.

Thank you both!
+rep for both!
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post #96 of 365
Quote:
Originally Posted by tictoc View Post

............It is only higher values like smp-7 that have problems with some WU's.

This^ I understand very well. wink.gif

Also, what AMD GPU would produce the most PPD, gaming be damned? (lolrite?) thumb.gif
 
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post #97 of 365
Quote:
Originally Posted by InsideJob View Post


OMG[oldschool]winz. wheee.gif
 
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post #98 of 365
Quote:
Originally Posted by XPD541 View Post

Quote:
Originally Posted by tictoc View Post

............It is only higher values like smp-7 that have problems with some WU's.

This^ I understand very well. wink.gif

Also, what AMD GPU would produce the most PPD, gaming be damned? (lolrite?) thumb.gif

Currently: 5800>6900>6800>7000

Stanford keeps making promises but haven't seen anything happen.
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post #99 of 365
Quote:
Originally Posted by Krusher33 View Post

Currently: 5800>6900>6800>7000
Stanford keeps making promises but haven't seen anything happen.

lol stanford will never honor a promise to amd crowd i mean the 5870 came out in 2009 and yet they still havet optimzed anything for amd gpus really.
post #100 of 365
Quote:
Originally Posted by XPD541 View Post

OMG[oldschool]winz. wheee.gif

What are you quoting redface.gif lol
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