[MITgcm-support] FW: R1 code

[Ed Hill]

> Hello,
> 
> My name is Sophie RICCI. I work as a post doc at JPL with Ichiro
> Fukumori. I work with your MITgcm code, the version I have is 2 years
> old, named R1. Dimitris Menemenlis  who also works in the team
> downloaded the latest version recently.
> 
> I noticed on the 2 years old version that there are tiles boundaries 
> problems when you change the number of processors.  Please find attached
> as ps1.ps the difference of rms between 2 runs ( one on 64 and the other
> on 32 CPU) for a 60 days period.  Have you seen this problem before? Has
> it been corrected in the latest version of the code?
> 
> Trying to answer this question myself I switched to the latest version
> of the code.  It appears that this tiles boundaries problem is not
> visible anymore ( see ps2 that computes the rms difference between 64
> and 32 CPU runs for the new version of code).
> 
> My problem is that the comparison between old 64 processors and new 64
> processors version show pretty big differences ( see ps3 that computes
> rms  diff between old and new 64 proc. runs).  Before eventually
> switching to the new version of the code I would like to understand
> where this differences come from and what are the major changes that
> occurred on the code between the 2 versions I have.


Hi Sophie,

Our mailman list software keeps rejecting the three attachments due to
their size so I put copies at:

  http://mitgcm.org/eh3/people/sricci/

Ed

-- 
Edward H. Hill III, PhD
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