Problem: cuda version and video games
7 Mar 2010 6:40:24 UTC
Topic 194806
(moderation:
It seems that everytime I play a video game the cuda app will refuse to work afterwards. The wu's will give a "computation error" after attempting to start and failing. I end up having to restart X and reload the nvidia module. Then things work fine.
I've tryed updating my nvidia drivers to the latest beta 195.30 but this didn't change anything. I'm using linux with a gts250.
Is this an nvidia bug or an einstein bug ?
Problem: cuda version and video games
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Hi sterling,
It would certainly help if you could provide us with the ID of the result/task that failed. You can find it in your account's task list. This way we could take a look at the error message. I suspect the there's not enough free video memory available, hence our app aborts. If that's the case we can't do anything about it. Whether X or NVIDIA is to blame is hard to tell. In my opinion the driver should take care of freeing up unused memory, e.g. when a process (your game) quits - apparently that's not the case...
Cheers,
Oliver
Einstein@Home Project
It would also be nice to know
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It would also be nice to know where you got your BOINC version from. Did you compile it yourself, and if so from which revision? I ask as 6.11.1 isn't on the horizon yet and may even never show up.
http://einstein.phys.uwm.edu/
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http://einsteinathome.org/workunit/69635480
http://einsteinathome.org/workunit/69635461
here are two of them and the memory that was free to them when this happened
Detected 1 GPU
^^^^ Device: 0
^^^^ Free : 439463424 bytes (429163 KB) (419 MB)
^^^^ Used : 97079808 bytes (94804 KB) (92 MB)
^^^^ Total: 536543232 bytes (523968 KB) (511 MB)
^^^^ 81.906433% free, 18.093567% used
they errored with 419MB of free mem
restarting X only results in 3 more MB of mem becoming available.
how much does einstein require ?
I'm using a custom boinc 6.11.1 as observed, havn't had a problem with gpugrid or seti cuda.
^^^^ Free : 439463424 bytes
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^^^^ Free : 439463424 bytes (429163 KB) (419 MB) Returning control to BOINC, delaying restart for at least five minutes...
------> If this problem persists you should consider aborting this task.
btw i've got an nvidia bug report form open, so lemme know what you think
thanks
RE: how much does einstein
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450MB free.
Where did you get it from? Crunch3r?
RE: RE: how much does
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It's my own modified version of the 6.11.1 svn, some slight scheduler tweeks and some extra messages output.
450MB is quite a bit, does this mean a 1GB card would fix this issue ?
are 256MB cards incompatible with einstein ?
I was thinking maybe they'd use some host memory to compensate, or use something similar to opencl's CL_MEM_ALLOC_HOST_PTR
So this would suggest I am infact running out of memory.
On a 1GB card would it use more than 450MB by any chance ?
bump for an answer from a dev
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bump for an answer from a dev to my 3 last questions.
thanks
"Our group has about 20
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"Our group has about 20 members including professors, scientists, graduate students and undergraduates who work closely together on the cutting-edge research."
Is 20 all einstein@home needs ?
I'd like to contribute.
Is this an oss project whose source code can be obtained ?
RE: 450MB is quite a bit,
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Maybe, that depends on whether or not that tasks will hang up in that one as well, as then you only need 2 before you have the problem again.
Yes, minimum GPU memory requirement is 450MB.
Probably. But not much more.
On your other question, look at http://einstein.phys.uwm.edu/license.php
I think i've discovered the
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I think i've discovered the problem.
Changing my resolution at all results in caches being cleared and 100MB of vid mem being freed instantly :)
This is a valuable suggestion to anyone who encounters the same problem as I did
(atleast for linux: just ctrl-alt-+/-)