Cuda tasks not using GPU

I have a Dell M6300 laptop (http://setiathome.berkeley.edu/show_host_detail.php?hostid=6840544) with an Core 2 Extreme and an Nvidia Quadro 1600M graphics processor. I just installed Windows 8 on it and installed the latest cuda drivers for it. I then downloaded new SETI tasks and I see that one of the tasks which is running is supposed to be utilizing the GPU, but it's utilizing ~50% of the main processor and according to GPU Shark (which is the GPU utilization task that I downloaded), the GPU is running a 0% utilization.

I've included a screen shot showing the BOINC Manager process status and the Task Manager showing both SETI processes each using about 50% of the processor. What's going on here?

-- Geoff


____________

Thanks for the info. I switched themes, basically shutting off Aero & got a lot of memory back. However, now I get the following. Is this just a fools errand to try to use this GPU?

-- Geoff

<message>
Incorrect function. (0x1) - exit code 1 (0x1)
</message>
<stderr_txt>
setiathome_CUDA: Found 1 CUDA device(s):
Device 1 : Quadro FX 1600M
totalGlobalMem = 268435456
sharedMemPerBlock = 16384
regsPerBlock = 8192
warpSize = 32
memPitch = 2147483647
maxThreadsPerBlock = 512
clockRate = 1250000
totalConstMem = 65536
major = 1
minor = 1
textureAlignment = 256
deviceOverlap = 1
multiProcessorCount = 4
setiathome_CUDA: CUDA Device 1 specified, checking...
Device 1: Quadro FX 1600M is okay
SETI@home using CUDA accelerated device Quadro FX 1600M
setiathome_enhanced 6.09 Visual Studio/Microsoft C++
libboinc: 6.3.22

Work Unit Info:
...............
WU true angle range is : 2.715301
Optimal function choices:
-----------------------------------------------------
name
-----------------------------------------------------
v_BaseLineSmooth (no other)
v_GetPowerSpectrum 0.00019 0.00000
v_ChirpData 0.01584 0.00000
v_Transpose4 0.00315 0.00000
FPU opt folding 0.00166 0.00000
CUFFT error in file 'c:/sw/gpgpu/seti/seti_boinc/client/cuda/cudaAcc_fft.cu' in line 62.
____________

This is actually an old machine of mine that I'm giving to my 91yo dad, so I'm not going to worry about this. I just installed the GPU drivers for desktop and new laptop, so we'll see how those go. Thanks for the help! Hopefully I won't need it with my systems.

-- Geoff
____________

I just got a nvidia GeForce GTX 650 with 2 GB of memory & installed it on a core i7 machine running Windows 8. All of my tasks are now aborting immediately with the following errors. The card has plenty of free memory and is running cool. Any ideas?

http://setiathome.berkeley.edu/result.php?resultid=2766312292

<core_client_version>7.0.28</core_client_version>
<![CDATA[
<message>
Incorrect function. (0x1) - exit code 1 (0x1)
</message>
<stderr_txt>
setiathome_CUDA: Found 1 CUDA device(s):
Device 1 : GeForce GTX 650
totalGlobalMem = -2147483648
sharedMemPerBlock = 49152
regsPerBlock = 65536
warpSize = 32
memPitch = 2147483647
maxThreadsPerBlock = 1024
clockRate = 1058500
totalConstMem = 65536
major = 3
minor = 0
textureAlignment = 512
deviceOverlap = 1
multiProcessorCount = 2
setiathome_CUDA: CUDA Device 1 specified, checking...
Device 1: GeForce GTX 650 is okay
SETI@home using CUDA accelerated device GeForce GTX 650
setiathome_enhanced 6.09 Visual Studio/Microsoft C++
libboinc: 6.3.22

Work Unit Info:
...............
WU true angle range is : 0.415212
Optimal function choices:
-----------------------------------------------------
name
-----------------------------------------------------
v_BaseLineSmooth (no other)
v_GetPowerSpectrum 0.00018 0.00000
v_ChirpData 0.01113 0.00000
v_Transpose4 0.00284 0.00000
FPU opt folding 0.00402 0.00000
CUFFT error in file 'd:/Projects/SETI/seti_boinc/client/cuda/cudaAcc_fft.cu' in line 62.

</stderr_txt>
]]>

Check the 2nd part ( 2) Kepler cards unsupported ) of this post out, http://setiathome.berkeley.edu/forum_thread.php?id=69735#1296126, as it maybe your problem.

Cheers.
____________

Thanks for the quick reply. As per the suggestions, I set the environment variable CUDA_GRID_SIZE_COMPAT to 1 and restarted BOINC and it's no longer aborting.

Another question: It appears that only 1 CUDA task can run as once and I see that the GPU is only typically running at about 60-70%. I also see that the estimated run time on the CUDA task is ~17 minutes and the actual run time is ~24 minutes, so if the GPU were running at 100%, the actual run time would be right around 17 minutes. Is setting this environmental variable causing some bottleneck?

-- Geoff
____________

edit app_info
<count>1</count
to
<count>.5</count>
for all of the count entries in the app_info.xml file.
This will do 2 wu instead of 1 and gpu useage will go up.

So where do I find this alpha version?

-- Geoff
____________