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valleo
Joined: 17 Aug 2011
Posts: 33
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 Posted: Sun Jul 29, 2012 2:37 pm Post subject: GPU+CPU Processing slower than GPU/CPU only (OS X 10.8) |
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I'm on Retina MacBook Pro (OS X 10.8, CUDA drivers 5.0.17) and when I activate CPU+GPU processing in Neat Video (latest version 3.2) the speed is much slower than CPU/GPU only.
Is this a known bug? |
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NVTeam
Joined: 01 Sep 2005
Posts: 1449
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| Posted: Sun Jul 29, 2012 9:30 pm Post subject: |
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Please post the log from Optimize window in NV preferences.
Thank you,
Vlad
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Neat Video team 
noise reduction for video and photo |
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valleo
Joined: 17 Aug 2011
Posts: 33
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| Posted: Sun Jul 29, 2012 9:58 pm Post subject: |
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Frame: 1920x1080 progressive, 32 bits per channel, Radius: 1 frame
Running the test data set on up to 8 CPU cores and on up to 1 GPU
CPU only (1 core): 1.71 frames/sec
CPU only (2 cores): 3.4 frames/sec
CPU only (3 cores): 4.69 frames/sec
CPU only (4 cores): 5.41 frames/sec
CPU only (5 cores): 5.18 frames/sec
CPU only (6 cores): 5.15 frames/sec
CPU only (7 cores): 4.93 frames/sec
CPU only (8 cores): 4.9 frames/sec
GPU only (GeForce GT 650M): 2.42 frames/sec
CPU (1 core) and GPU (GeForce GT 650M): 2.17 frames/sec
CPU (2 cores) and GPU (GeForce GT 650M): 3.76 frames/sec
CPU (3 cores) and GPU (GeForce GT 650M): 4.95 frames/sec
CPU (4 cores) and GPU (GeForce GT 650M): 5.65 frames/sec
CPU (5 cores) and GPU (GeForce GT 650M): 5.62 frames/sec
CPU (6 cores) and GPU (GeForce GT 650M): 5.41 frames/sec
CPU (7 cores) and GPU (GeForce GT 650M): 5.32 frames/sec
CPU (8 cores) and GPU (GeForce GT 650M): 5.26 frames/sec
Best combination: CPU (4 cores) and GPU (GeForce GT 650M)
Hm...now it's faster. One minute ago, GPU speed was about 1 fps, CPU speed is just constant. Crazy! |
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NVTeam
Joined: 01 Sep 2005
Posts: 1449
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| Posted: Sun Jul 29, 2012 11:08 pm Post subject: |
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The CPU seems to be twice faster than that GPU, so it is probably better to use the CPU alone. Mobile GPUs are typically not very fast (as compared with desktop versions) so it is not abnormal for a modern CPU to be that faster than GPU.
Vlad
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valleo
Joined: 17 Aug 2011
Posts: 33
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| Posted: Thu Aug 02, 2012 8:27 am Post subject: |
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Okay, thank you very much.
But there is still a problem with the GTX 650M and Neat Video. Everytime I start denoising, the Terminal jumps in and says I'm out of memory. |
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NVTeam
Joined: 01 Sep 2005
Posts: 1449
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| Posted: Thu Aug 02, 2012 8:40 am Post subject: |
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Does that happen even if you disable use of GPU in NV Preferences?
Vlad
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valleo
Joined: 17 Aug 2011
Posts: 33
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| Posted: Thu Aug 02, 2012 8:46 am Post subject: |
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| No, just when I use GPU only or both together. |
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NVTeam
Joined: 01 Sep 2005
Posts: 1449
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| Posted: Thu Aug 02, 2012 9:08 am Post subject: |
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Apparently there is some problem with that GPU, perhaps the CUDA driver needs to be updated by NVidia.
Anyway, since that specific GPU is slower than CPU, I recommend to simply disable GPU and use the CPU alone.
Vlad
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Neat Video team
noise reduction for video and photo |
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