Forum > GPU crunching
Large number of Errors when processing.
_Geordie_:
Pepi - read above please..... ::)
Raistmer - Yep that's because I've reverted back to the stock app in the past day or so to see if my hardware is a problem - I'm getting some app errors but no more than I've seen on other machines - its not screaming through the entire days quota in a couple of minutes now and I've not had one driver crash.
http://setiathome.berkeley.edu/result.php?resultid=1540425786
http://setiathome.berkeley.edu/result.php?resultid=1540423298
http://setiathome.berkeley.edu/result.php?resultid=1540423294
http://setiathome.berkeley.edu/result.php?resultid=1540423290
http://setiathome.berkeley.edu/result.php?resultid=1540423281
That's just a few of the many.
Raistmer:
Reverting to stock not helped much it seems.
Opt app has better means for issues debugging, not only bettter speed.
For example:
After app init: total GPU memory 536870912 free GPU memory 128245760
That is, your GPU has ~512 onboard memory, but only ~128MB is available at moment app started to allocate memory.
This amount on border line, sometimes it's not enough, that's why that result (firts of listed by you) errored out with memory allocation error.
Maybe errors in stock app induced by same shortage of GPU memory, it's the primary cause you need to fight with.
Do you running some graphic-intencive app (like 3D ganes) while crunching with CUDA MB? Do you use some 3D screen-savers? Any another GPU memory consumers maybe?
Try to free more GPU memory, 512MB is more than enough for CUDA MB, but 128MB sometimes not enough...
_Geordie_:
mmmm not sure what could be causing that - definately no game playing. The CUDA app only runs when the machine is idle also - there's nothing running on the box other than 8 optimized clients when the CUDA app starts AFAIK.
Just looked even further back and its the same problem with every one of the sample (10 or so) I looked at.....and yes it looks as if the error with the stock app even though less frequent and not crashing the driver is a consistent error.
Looking at GPU-Z each GPU is apparently only using 21Mb of memory right now. (providing it interogates the GPU correctly?)
As for driver version I'm running 190.38 at the moment - going to try 191.07.
Are there any quirks with the 9800GX2 that could be causing this?
Raistmer:
--- Quote from: _Geordie_ on 11 Mar 2010, 06:55:40 pm ---Are there any quirks with the 9800GX2 that could be causing this?
--- End quote ---
Sorry, don't know. Try to ask on SETI main forums. There are some owners of 9800 cards, maybe they could give some insights...
_Geordie_:
Will do thanks.
Fairly new to CUDA/GPU crunching so learned a few things here anyhow! Appart from obviously not playing games when the app starts is there any way to check and ensure that nothing is running on the GPU?
Just running a memtest on each GPU RAM. Seems ok.
I've changed to 191.07 and reverted back to the optimised app to see if that helps.
I'll see if I can find any 9800GX2 card specific issues.
If I resolve it I'll post back here.
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