Plugin: PhaseSpace with Long Edge SuperCell

[ax3l]

Implement a more variable phase space binning.

First step:

• [x] First: Reduce the binning to stay under 48 KB (or to be a bit more strict 32 KB) shared memory. Relevant for change in precision of float_PS and for changed super cells ("long edge problem").
• [ ] Later: Accept any binning and run over the particles multiple times with a striding in momentum direction for each round.
  • allow setting of num_pbins in phaseSpace.param (feature)
  • set functor related options there, too (feature)

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The phase space plugin does not run it's kernels for a 2D sim with 8x16 or 16x16 tile sizes.

(but works fine for 3D 8x8x4; 2D 8x8) Fixed with #480

[ax3l]

The problem is caused by the available shared memory. each block is called for a super cell with max(TILE_X, TILE_Y, TILE_Z) times 1024 elements in phase space.

with the default setting (max=8) and float that uses 32KB shared (<48KB). Using a super cell with a larger edge or using double usually blows the maximum available shared mem.

One could add a compile-time check now, if the setting will fit the shared memory available.

An extension proposed by @psychocoderHPC and me would be to walk over the particle list N-times and to split the local phase space section into N slices in momentum direction.

[ax3l]

Oh I already transformed the "bug report" in an to-be-implemented feature. So let me open this again :)

[psychocoderHPC]

oh sry for closing I pressed the wrong bottom on my mobile phone

[ax3l]

classic first world hipster problem :smile: