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Install CUDA-7.5 on a computer using GTX950 and Tesla K40

I'm trying to do install CUDA-7.5 on Ubuntu 14.04, And I have both GTX950 and Tesla K40 inserted in my motherboard.

and the lspci | grep -i nvidia command gives the following result:

01:00.0 3D controlloer: NVIDIA Corporation GK110BGL [Tesla K40c] (rev a1)
02:00.0 VGA compatible controller: NVIDIA Corporation GM206 [GeForece GTX 950] (rev a1)
02:00.1 Audio device: NVIDIA Corporation Device 0fba (rev a1)

I think I have successfully installed CUDA-7.5 on my computer, because I can actually run ./smokeParticles sample in NVIDIA_CUDA-7.5_Samples/bin/x86_64/linux/release/.

But I have one question:

  • How can I be sure that I'm actually using Tesla K40? Because the ./smokeParticles sample is also successful after I unplug the Tesla K40 form my motherboard. (I assume that GTX 950 is running the sample...)

Is there a command or something that can tell me I'm using Tesla K40?

Solution

  • In cuda sample, deviceQuery is used to test whether cuda is installed correctly and show basic information about each card. This will tell you a device number of each cuda device.

    For example, I run it on my server:

    $ ./deviceQuery |egrep '^Device [0-9]+'
Device 0: "GeForce GTX 980 Ti"
Device 1: "GeForce GTX 980 Ti"
Device 2: "GeForce GTX 980 Ti"
Device 3: "GeForce GTX 980 Ti"

    In your cuda application, use cudaSetDevice() to select card to run. Look into the sample source to see how to use it.