[petsc-users] Parallel writing in HDF5-1.12.0 when some processors have no data to write

[Danyang Su]

Hi All,

 

After updating to HDF5-1.12.0, I got some problem if some processors have no data to write or not necessary to write. Since parallel writing is collective, I cannot disable those processors from writing. For the old version, there seems no such problem. So far, the problem only occurs on Linux using GNU compiler. The same code has no problem using intel compiler or latest gnu compiler on MacOS.

 

Looks like it is caused by zero memory space. However, as documented in 

 

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