Setting up openCL

I am still developing the procedure that follows. I don't have openCL working yet.

I will use openCL to do radio array computations faster.

I am running Scientific Linux on a Scientific Linux 6.2 system (2.6.32 kernel), Intel P4 3GHz 2CPU 12000 bogomips. My graphics card is an nVidia G92 9800GTX (112 CUDA cores, 512MB RAM, PCIEx16 gen1). This drives a 20 inch Viewsonic 1400x1050 display.

See https://developer.nvidia.com/opencl

Setting up the nVidia driver

• 0) back up /etc/r

• 1) download the NVIDIA driver installer from http://www.nvidia.com/object/linux-display-ia32-310.44-driver.html

• 2) Turn off the nouveau driver.
  • in /etc/grub.conf, add rdblacklist=nouveau to the end of each "kernel" line
• 3) reboot to single user, telinit 3
• 4) run the NVIDIA driver installer. Among other things, this will add /etc/modprobe.d/nvidia-installer-disable-nouveau.conf

This adds a whole bunch of files and modules, including /etc/OpenCL with an nVidia vendor file.

The installed driver is 310.44, NV-Control Version 1.28

Note - I did this before setting up the SDK. The SDK may also have the driver!

Setting up the SDK

• also see http://docs.nvidia.com/cuda/cuda-getting-started-guide-for-linux/index.html

• download CUDA from https://developer.nvidia.com/cuda-downloads

• Yikes! there is no entry for RHEL6 32 bit! Let's try RHEL5 32 bit.
  • Click that button, download the 570MB cuda_5.0.35_linux_32_rhel5.x-1.run
  • run that as root
• modify the PATH to include /usr/local/cuda-5.0/bin . I put this in /etc/profiles.d/cuda.sh:
  • PATH=/usr/local/cuda-5.0/bin:${PATH}
  • export PATH
• I put this in /etc/ld.so.conf.d/cuda.conf:
  • /usr/local/cuda-5.0/lib
• then ran ldconfig as root
• /usr/bin/nvidia-settings . . . nvcc -V . . .

More setup to prepare for samples

• yum install freeglut
• ln -s /usr/lib/libglut.so.3 /usr/lib/libglut.so
• yum install openmpi openmpi-devel
• ln -s /usr/lib/openmpi/bin/mpicxx /usr/local/bin/mpicxx
• yum install libXmu-devel

samples

• sh cuda*run -silent -driver -samples
• cd /usr/local/cuda-5.0/samples . . . . make
• in /usr/local/cuda-5.0/samples/bin/linux/release:
  • smokeParticles
  • randomFog

Comparison of nVidia cards: