mdcore Code

Things that need to be done, in no particular order:


Things to do with useability:

* 2010/12/14: Find a way to set OMP_WAIT_POLICY=PASSIVE in test.c.
* 2011/01/03: Make a single header file "mdcore.h".
* 2011/01/03: Add functions to set the engine time and dt in a more elegant way.
* 2011/01/03: Add a function engine_map to call a function on each particle.


Things to do with documentaiton:

* 2011/01/04: Try to somehow make bulk text on doxygen.
* 2011/01/04: Add a long description for each structure detailing what it does,
              how it should be created and how it should be used.
* 2011/02/03: Write-up a tutorial based on examples/test.c.
* 2011/03/07: Go through each file and update the function headers, make more
              verbose/explicit with details of what is being done exactly and
              how to call, especially for external function!
* 2011/03/07: Make doxygen headers for runner_spu.c, make sure it's in the
              documentation path.


Things to do with functionality:

* 2010/12/03: Use B-Tree to map particle vids to the actual particle data
              inside the engine.
* 2010/12/03: Somehow add bonded interactions to cell pairs or some
              mechanism to treat bonds, angles and torsions in parallel
* 2010/12/03: Keep track of particles that wander into a ghost layer
              or out of the domain (is this really needed?).
* 2010/12/22: Add one-sided potentials for grid point pseudo-particles.
* 2010/12/22: Add explicit electrostatics to the SPU code.
* 2011/01/17: Add potential functions using automatic vectorization for gcc,
              check if this is significantly slower than using SSE/SSE2
              intrinsics directly.
* 2011/01/24: What happens to the local ids when the user removes a part?
* 2011/02/21: Use Metis to approximate the optimal tuples.
* 2011/03/07: Add a way of passing engine flags to the SPU, use it to
              pass an option potential_eval_vec or potential_eval_vec2.
              
              
Things to do with the configuration process:

* 2011/03/07: AX_EXT only works for x86 CPUs.
* 2011/03/07: Add a check for "make".
* 2011/03/07: Different versions of spu-gcc and ppu-gcc don't allow
              array-like access of vector types.

             
Things to do with testing:
              
* 2011/01/17: Test explicit electrostatics.
* 2011/02/27: Test if the engine_flag_prefetch actually does any good.
* 2011/03/07: Test AltiVec version of potential_eval_vec_4single.


Things to do with speed:

* 2010/12/14: Use local on-stack copy of eng->p in runner_dopair and
              runner_sortedpair?
* 2010/12/14: Write-back force of outer-loop particle only at the end
              of the outer loop?
* 2011/01/03: Use FMA when available (SSE4?).
* 2011/01/03: Add support for AltiVec instructions.
* 2011/01/17: Use sorting networks to improve sorted interactions?
* 2011/01/24: Use integer sorting for the sorted interactions in runner_spu.
* 2011/02/04: Make the struct potential and its data share the same chunk of
              memory (watch out for alignment!)?
* 2011/02/04: More refined use of __builtin_prefetch on cell particle lists?