Performance improvements

As I reported some weeks ago, I’m working in the code optimization. To do it I implemented the following changes:

1. Now all the data (including the output one) is sorted before compute the interactions
2. Hence the permutations vectors are not needed anymore in the interactions stage
3. Some useless output data have been removed
4. The registers pressure have been optimized

Let’s say goodbye to more than 10% of the simulation time!

For the moment the optimized version can be found in the optimization branch of the git repository.
—
P.S. I performed this work with CodeXL by AMD, basically due to NVidia suddenly decided to remove the OpenCL support in the profiler in CUDA 5.
NVidia is expending a lot of resources trying to destroy OpenCL, while AMD is beating them in the hardware side (the real world).
I just hope NVidia people change it’s direction before they reach the final which are deserving.

Also CodeXL is free!

Rates kernel bottleneck

With the last changes implemented in the code the registries pressure during the interactions computations has been dramatically increased, which reduces the computation device occupancy.

This performance lost is my next target to fix (partially at least)…

New input/output interface

A new input/output interface is coming… Following it’s features:

1. An easy way to implement new loaders/savers
2. Improved XML input
3. Capability to save the XML case definition (which allows to continue the simulation from the last saved file)
4. H5Part cleared
5. Improved the post-processing with Paraview (including tools to fix the errors with the locale options)

Actually it is in development in the input_output branch, but hopefully it will be merged soon

 

Web improvement

The web page has been slightly improved introducing a downloads section.

To do it a PHP based templates system has been introduced!

libmatheval

Instead of using a home made math expressions evaluator I moved to the GNU library libmatheval. This change imply more robustness and less maintenance.

Now I can improve the input-output layer (which needs a simple layer to create savers/loaders)

Code styling finished

The code style modification has been completed (for sure style violations can be found, but at least it is not a complete disaster).

So I will consider it as the initial release, and start branching the work!

Initial release

The initial release has been uploaded! You can get it from GitHub typing:

https://github.com/sanguinariojoe/aquagpusph.git

I was waiting like a dumb for the CUSL development stage start in order to upload the initial release, just because the development stage starts when the project is officially accepted (there are not a kick off).

Anyway, it will be awesome!