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library:computing:xios_impi_troubles [2026/03/19 20:10]
84.88.52.107 old revision restored (2026/03/09 09:15) 		library:computing:xios_impi_troubles [2026/05/08 08:10] (current)
84.88.52.107 old revision restored (2026/03/19 21:23)
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 **Diagnosis:** What we know until now is that compiling NetCDF with P-NetCDF messes up the nc_open function so it cannot be used by NEMO. We are not sure if this problem is produced by NetCDF alone, or if netcdf.hpp header files included with XIOS 2.0 are doing the mess. As stated above, compiling NetCDF ourselves would be needed to know more about the problem. **Diagnosis:** What we know until now is that compiling NetCDF with P-NetCDF messes up the nc_open function so it cannot be used by NEMO. We are not sure if this problem is produced by NetCDF alone, or if netcdf.hpp header files included with XIOS 2.0 are doing the mess. As stated above, compiling NetCDF ourselves would be needed to know more about the problem.
  
-**Solution:** Until we have more information the best solution is to use a NetCDF version that does not have P-NetCDF support. In any case XIOS uses NC4, which is using HDF5 for parallel write.+**Solution:** Until we have more information the best solution is to use a NetCDF version that does not have P-NetCDF support (4.2 and 4.4.0 in MN4). In any case XIOS uses NC4, which is using HDF5 for parallel write.
  
 **More information:** **More information:**
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 [[https://github.com/01org/psm/blob/master/ptl_ips/ips_proto.c]] [[https://github.com/01org/psm/blob/master/ptl_ips/ips_proto.c]]
-==== Issue 4: ====+==== Issue 4: EC-Earth enters in a dead lock when using fabric (OFA network fabrics) module ====
  
 **Environment:** Auto-EC-Earth 3.2.2_develop_MN4 (EC-Earth 3.2 r4063-runtime-unification).  **Environment:** Auto-EC-Earth 3.2.2_develop_MN4 (EC-Earth 3.2 r4063-runtime-unification). 
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   * Flags: -O0 & -O3   * Flags: -O0 & -O3
  
-**Problem:** +**Problem:** When loading module fabric, created by Ops to solve Issue 2 on NEMO (assertion invalid), EC-Earth enters in a deadlock. Our NEMO benchmark was rather running, but MPI_Finalize was not working and jobs never finished until wallclock time limit was reached. 
  
 **Actions taken:** **Actions taken:**
library/computing/xios_impi_troubles.1773951019.txt.gz ยท Last modified: 2026/03/19 20:10 by 84.88.52.107

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