CODEWITHSUNDEEP
cuda
Gejun
Gejun

Reputation: 4572

Confusing cuda versions

I just installed the latest CUDA 9.1 on Ubuntu 16.04 according to the official instruction. But when I run the command nvcc -V, it still shows my cuda version is 7.5 like below.

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2015 NVIDIA Corporation
Built on Tue_Aug_11_14:27:32_CDT_2015
Cuda compilation tools, release 7.5, V7.5.17

Also, which nvcc gave me /usr/bin/nvcc which is not under /usr/local folder. Is this normal? Is this a compatibility issue? I have a GTX 1080 Ti and a GTX 980. I added commands below to .bashrc file, but it still didn't work.

export PATH=/usr/local/cuda-9.1/bin${PATH:+:${PATH}}
export LD_LIBRARY_PATH=/usr/local/cuda-9.1/lib64${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

Upvotes: 2

Views: 2910

Answers (1)

Robert Crovella
Robert Crovella

Reputation: 152113

The best thing to do here is to remove all traces of CUDA binaries from the /usr/bin directory, and in the future always install the CUDA toolkit in the "default" locations at /usr/local/cuda-XX

To remove CUDA items from /usr/bin, just use the linux rm command as a root user. Not sure what to remove? Take a look in an "ordinary" CUDA install bin directory, such as /usr/local/cuda-8.0/bin

By having your CUDA install at the default locations e.g. /usr/local/cuda-8.0 and /usr/local/cuda-9.0 (for example), you can have "side-by-side" installs, and switch between them by modifying the PATH and LD_LIBRARY_PATH variables accordingly.

Upvotes: 6

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