CUDA 1.1 device file not initialized

Accelerated Computing CUDA CUDA Programming and Performance
1

Just an FYI…we recently upgraded from CUDA 1.0 to CUDA 1.1 on our GPU computing cluster. The techs had to run the commands listed below on each host at reboot to get things working properly. Not sure why this was necessary; the techs speculated that it might be necessary because the cluster nodes don’t run X, which probably initializes the device files on its own.

Setup Nvidia device files

mknod /dev/nvidiactl c 195 255
for n in 0 1 2 3 ; do
mknod /dev/nvidia$n c 195 $n
done
chmod a+w /dev/nvidia*

2

I was under the impression that this was always required with CUDA if you didn’t load X first (including previous CUDA releases).

3

Yes,
that was always required.