[MITgcm-cvs] MITgcm/verification/global_ocean_pressure/results CVS Commit

[Alistair Adcroft]

Update of /u/gcmpack/MITgcm/verification/global_ocean_pressure/results
In directory faulks:/scratch/adcroft/MITgcm/verification/global_ocean_pressure/results

Modified Files:
	output.txt 
Log Message:
Changed the order of operations for global sums of arrays.
 o this *DOES* change output
   - the following results are updated by this change:
        exp4 front_relax global_ocean.cs32x15 global_ocean_pressure
        ideal_2D_oce internal_wave natl_box plume_on_slope
   - changes are primarily due to different cg2d residuals but in some
     the Eta field changes and this changes other fields
 o the global sum used to accumulate sequentially over all tiles on a single
   process and then the result be passed to _GLOBAL_SUM()
 o now we create a sum per tile and accumulate the sums
   - this should fix differences in sum for two tiles on 1 or 2 processors
   - this may help when using more than2 tiles but is not guaranteed
   - introducing a gather operation in GLOBAL_SUM() will fix differences
     for multiple tiles but only for fixed tiles configurations
   - an array based sum function is needed to make this independent of
     tile configuration