Case studies constitute a modern interdisciplinary and valuable teaching practice which plays a critical and fundamental role in the development of new skills and the formation of new knowledge. This research studies the behavior and performance of two interdisciplinary and widely adopted scientific kernels, a Fast Fourier Transform and Matrix Multiplication. Both routines are implemented in the two current most popular many-core programming models CUDA and OpenACC. A Fast Fourier Transform (FFT) samples a signal over a period of time and divides it into its frequency components, computing the Discrete Fourier Transform (DFT) of a sequence. Unlike the traditional approach to computing a DFT, FFT algorithms reduce the complexity of the problem from O(n2) to O(nLog2n). Matrix multiplication is a cornerstone routine in Mathematics, Artificial Intelligence and Machine Learning. This research also shows that the nature of the problem plays a crucial role in determining what many-core model will provide the highest benefit in performance.
Project starts off with smaller tests between the different methods.
- Radix-2 FFT Sequential VS OpenACC VS CUDA Global Memory VS CUDA Shared Memory
- Matrix Multiplication Sequential VS OpenACC VS CUDA Global Memory VS CUDA Shared Memory
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.
Latest Nvidia drivers
CUDA 9.0 Toolkit
GCC and G++ compilers
OpenACC PGI Compiler
PGI Account
Installing Adapted from here
Linux Standard Base, lsb, must be present for the license utilities to work properly. Enter the command lsb_release to see if you have lsb, and, if so, which version. PGI installations require version 3.0 or newer. To install lsb, try running one of the following command
$ sudo apt–get install lsb
Create an account at www.pgroup.com. Go to www.pgroup.com/register to create an account.
When ready, you can download the proper package(s) at www.pgroup.com/ support/downloads.php. The file sizes can be large. Will be used later.
Install Nvidia CUDA 9.0 Toolkit from https://developer.nvidia.com/cuda-downloads
Unpack the PGI software. In the instructions that follow, replace with the name of the file that you downloaded. Use the following command sequence to unpack the tar file before installation.
$ tar xpfz <tarfile>.tar.gz
Run the installation script and follow on-screen instructions.
$ sudo ./install
Make PGI products accessible. In the terminal: NOTE: the directory with the version number 17.10 may vary according to your installation. Verify that it is correct or change accordingly
export PGI=/opt/pgi;
export PATH=/opt/pgi/linux86-64/17.10/bin:$PATH;
export MANPATH=$MANPATH:/opt/pgi/linux86-64/17.10/man;
export LM_LICENSE_FILE=$LM_LICENSE_FILE:/opt/pgi/license.dat;
That should be it for the community version.
The Microsoft Windows Software Development Kit (SDK) is a prerequisite for all Windows installs. Download the Windows SDK at http://www.pgroup.com/microsoftsdk.
The PGI Community Edition on Windows requires that Microsoft Visual Studio 2015 with Visual C++ be installed first.
Install CUDA Toolkit and drivers just like the linux instructions.
Download the software from www.pgroup.com or another electronic distribution site. Select the install package appropriate for your OS.
Run the installation executables as Administrator.
That should be it for the community version.
- Shady Boukhary
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