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4th BOINC Pentathlon - May 5th - 18th, 2013 - Page 77

post #761 of 1424
how do you have the gpu crunch more than one WU at a time?
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post #762 of 1424
Quote:
Originally Posted by Finrond View Post

Well the number of waiting for validation tasks on the Einstein server status page has been steadily decreasing from ~38k down to 24k over the last hour so you should probably start to see your numbers decrease as well.

http://einstein.phys.uwm.edu/server_status.html

Now my pending queue is down to 1000 tasks, over 300 tasks got validated in last couple of hours. Looks like I'll make my second million very quickly biggrin.gif
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post #763 of 1424
In the Einstein config on their website, change the GPU Utilization Factor. 1.0 = 1 unit per card. 0.5 = 2 units per card. 0.33 = 3 units per card. 0.25 = 4 units per card and so on.

[edit] We've moved into a tie for 9th overall with ESL thanks to us taking over 8th in Einstein from ESL thumb.gif


Edited by Angrybutcher - 5/8/13 at 10:25am
 
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post #764 of 1424
Thanks duder, we must crunch harder!
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post #765 of 1424
5th place in Einstein is starting to look very much possible
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post #766 of 1424
With our production the past 6 hours, rank 5 is in our grasp for Einstein. Need more production to hit #4 however. I'll update my chart after lunch thumb.gif
 
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post #767 of 1424
I've got 3 tasks per card going on all 4 cards. 2 tasks = 28 - 30 minutes. 3 tasks = 36 - 38 minutes on the 7950's. I'm giving them 0.25 CPU so I get 7 x WCG work units going on the 3770K and 3 x WCG work units on the 3570K. It's weird - the WCG work units complete in around 3.5 hrs on the 3570K and take around double the time on the 3770K. Maybe because of the hyperthreading being weaker than a full core? I've only had the i7 for a few days so have no experience with this redface.gif
 
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post #768 of 1424
Quote:
Originally Posted by Angrybutcher View Post

For those crunching Einstein, I highly recommend you look into doing at least 2 units per card. I just did the math on mine and here's what I got

7970 @1ghz - 1 unit per card, about 780 seconds of work, = 55k ppd per card
7970 @ 975mhz - 2 units per card, about 908 seconds of work, = 95k ppd per card (or 47k ppd per unit)

I'll bump it up to 3 units tonight and see what happens but 2 nearly doubles the output. I didn't expect it to be that close to double.

Does that also apply for lower spec cards? It might be the level of parallelism doesn't use all the stream processors / shaders?
Quote:
Originally Posted by Angrybutcher View Post

In the Einstein config on their website, change the GPU Utilization Factor. 1.0 = 1 unit per card. 0.5 = 2 units per card. 0.33 = 3 units per card. 0.25 = 4 units per card and so on.
The Einstein@Home site says 1.0 is max GPU usage, so I guess it's pretty misleading. I thought it was like the CPU time settings

I read http://boinc.berkeley.edu/dev/forum_thread.php?id=7643 and http://www.setiusa.us/showthread.php?3538-Einstein-Einstein-Home-GPU-Application-for-ATI-AMD-Graphics-Cards&s=630f6df2be71967395d9137aa9b6d48d&p=41655&viewfull=1#post41655
Quote:
1 = 1 task per GPU
.5 = 2 tasks per GPU
.33 = 3 tasks per GPU, etc.

FYI, the upper limit is the memory of the GPU. Per the admin, you can run 2-3 tasks per 1gb of VRAM.

&
Quote:
The OpenCL GPU application here at Einstein likes it best when it can utilize a full CPU core. In order to do that, you set up BOINC to use all cores minus one, e.g. on your 4 core CPU, set your preferences (*) to "On multiprocessors, use at most 75% of the processors". That way, yes, only 3 tasks will run on the CPU cores, but at least that last CPU core will now be fully utilized by the GPU application. And that speeds up the work.
http://einstein.phys.uwm.edu/forum_thread.php?id=9445

Unlike Folding it isn't very straightforward -.-
Edited by AlphaC - 5/8/13 at 11:31am
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post #769 of 1424
Unfortunately do to lack of employment/job I won't be participating in this BOINC pentathalon darn it. Hope you guys crank out some serious numbers! thumb.gif
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post #770 of 1424
Quote:
Originally Posted by AlphaC View Post

Does that also apply for lower spec cards? It might be the level of parallelism doesn't use all the stream processors / shaders?

It wont have as dramatic an effect on lower spec cards, but I still see an improvement with my 6950 and GTX 465. The GTX 275 sees some benefit as well, but not nearly as much and it only hits 75 percent GPU with 2 tasks running.
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