Forum > GPU crunching
x38g reports
perryjay:
This is one of the long ones http://setiathome.berkeley.edu/result.php?resultid=2000429739 and this is one of the short ones http://setiathome.berkeley.edu/result.php?resultid=2000429745 No idea what is happening to the run time.
Oh, and all I had to do was hit the post button again. I hit my back button without checking to make sure the post had gone through.
Jason G:
--- Quote from: perryjay on 18 Jul 2011, 03:59:24 pm ---This is one of the long ones http://setiathome.berkeley.edu/result.php?resultid=2000429739 and this is one of the short ones http://setiathome.berkeley.edu/result.php?resultid=2000429745 No idea what is happening to the run time.
--- End quote ---
Were you running the longer one alongside Raistmer's OpenCL APs ? You could try use Fred's priority thingy, or Process Lasso or similar to jack up the priority on the Cuda app. Doing other stuff on the machine ?
You get any sticky downclocks still? How's the temperatures etc ?
Jason
perryjay:
Temp is 69c, no sticky down clocks, and I was running Raistmers' app at the same time for both of them. I'm only running one MB and one AP on my GPU so it would finish like the short one then do the long one. That or a couple of short ones in a row then a long one. I've mostly been changing the unroll on his app trying to find a sweet spot but it doesn't seem to matter as to how fast or slow the MBs are.
Raistmer:
--- Quote from: perryjay on 18 Jul 2011, 04:10:42 pm ---I've mostly been changing the unroll on his app trying to find a sweet spot but it doesn't seem to matter as to how fast or slow the MBs are.
--- End quote ---
But it can matter. Different unrolls take different amount of GPU memory. So, at least different memory layouts for CUDA app. And with higher unrolls it can have memory shortage...
perryjay:
I've been keeping an eye on the times as I make the changes if I change while a WU is running then I watch how fast it was running as compared to what it does after the change. I've also made the change before the WU runs and compare it to another run before the change. The longer WUs seemed to pause for a minute or two even though the elapsed time kept climbing. It didn't seem to have anything to do with what the AP app was doing. This without me doing any piddling around.
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