All technical blog posts written by people of the Stream HPC team.
There is a lot going on at the path to GPGPU 2.0 – the libraries on top of OpenCL and/or CUDA. Among many solutions we see for example Microsoft with C++ AMP on top of DirectCompute, NVidia (and more) with OpenACC, and now AccelerEyes (most known for their Matlab-extension Jacket and libJacket) with ArrayFire. I want you to
AccelerEyes ArrayFire Read More »
There are two overviews I use during my training, and I would like to share with you. Normally I write them on a whiteboard, but it has advantages having it in a digital form. Transfer speeds per bus The below image gives an idea of theoretical transfer speeds, so you know how a fast network
Theoretical transfer speeds visualised Read More »
Does your computer have OpenCL-capable hardware? Read on and find out if your computer is compatible… If you want to know what other non-PC hardware (phones, tablets, FPGAs, DSPs, etc) is running OpenCL, see the OpenCL SDK page. For people who only want to run OpenCL-software and have recent hardware, just read this paragraph. If you have
Do your (X86) CPU and GPU support OpenCL? Read More »
In the OpenCL-code, you have run-time and compile-time of the C-code. It is very important to make this clear when you talk about compile-time of the kernel as this can be confusing. Compile-time of the kernel is at run-time of the software after the compute-devices have been queried. The OpenCL-compiler can make better optimised code
Basic concepts: Function Qualifiers Read More »
Intel, AMD and NVidia have all written implementations of the Black-Scholes algorithm for their devices. Intel has described a kernels in their OpenCL optimisation-document (page 28 and further) with 3 random factors as input: S, K and T, and two configuration-constants R and V. NVidia is easy to compare to Intel’s, while AMD chose to write down the
Black-Scholes mixing on SandyBridge, Radeon and Geforce Read More »
HTML5 has the future, now Flash and Silverlight are abandoning the market to make the way free for HTML5-video. There is one big problem and that is that it is hard to protect the content – before you know the movie is on the free market. DRM is only a temporary solution and many times
OpenCL potentials: Watermarked media for content-protection Read More »
This article will be of interest if you don’t want to read the whole new specifications [PDF] for OpenCL 1.2. As always, feedback will be much appreciated. After many meetings with the many members of the OpenCL task force, a lot of ideas sprouted. And every 17 or 18 months a new version comes out of OpenCL to
Differences from OpenCL 1.1 to 1.2 Read More »
Typos are a programmers worst nightmare, as they are bad for concentration. The code in your head is not the same as the code on the screen and therefore doesn’t have much to do with the actual problem solving. Code highlighting in the IDE helps, but better is to use the actual OpenCL compiler without
Basic Concepts: online kernel compiling Read More »
Disclaimer: I am not a lawyer and below is my humble opinion only. The post is for insights only, not for legal matters. GPL was always a protection that somebody or some company does not run away with your code and makes the money with it. Or at least force that improvements get back into
Kernels and the GPL. Are we safe and linking? Read More »
In the series Basic Concepts I try to give an alternative description to what is said everywhere else. This time my eye fell on alternative convenience methods in two cases which were introduced there to be nice to devs with i.e. C/C++ and/or graphics backgrounds. But I see it explained too often from the convenience functions and
Basic Concepts: OpenCL Convenience Methods for Vector Elements and Type Conversions Read More »