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Draft: Add Symmetric Block Cyclic distribution as alternative to 2D Block Cyclic

VERITE Mathieu requested to merge mverite/chameleon:sbc_mapping into master

Additional features:

  • possibility to distribute matrix A according to Symmetric Block Cyclic mapping which generates fewer data transfers for symmetric kernels;
  • possibility to remap A between 2D Block Cyclic and Symmetric Block Cyclic asynchronously.

Issues:

  • remapping not working for POTRI;
  • no output to stdout for POSV using SBC.

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