Forum > GPU crunching

AMD 12.1 previe driver performance

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Raistmer:
3 VLARs running, BOINC just started

Jason G:

--- Quote from: Raistmer on 01 Jan 2012, 06:12:30 pm ---Well, in existing apps I relied on OS/driver to cleanup GPU state when process terminated.
It's possible that new AMD drivers can't cleanup properly and need help from application.
So I will not go further in optimization and implement full OpenCL objects cleanup inside app instead. Maybe this could help with this issue.
--- End quote ---

Probably that'll be along the right lines.  Similar (with slighlty different symptoms) was originally happening under Cuda, resolved by making sure safe exit shutdown code was used, rather than terminating the process/thread during mid kernel execution or memory transfers.  The side effects on Cuda devices/drivers were more along the lines of sending the driver into failsafe/sticky-downclock, but I can see that similar mechanisms might result in resource leaks or other unpredictable problems like that.

Jason

Claggy:
One ATI_r521 AP task running slowly, then GPUs suspended and resummed



Claggy

skildude:
for giggles I decided to try 4 WU's on my 6970.  All seems well

Frizz:
On my 6970 I get the highest RAC when running 4 Astropulse WUs in parallel. At least at times when there were such things as AP units  ;)

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