[MITgcm-support] RE: conversion from local tile index to global new I/O format index

['Andrew Eichmann']

* Ichiro Fukumori <if at pacific.jpl.nasa.gov> wrote on Tue, Mar 30, 2004 at 04:32:26PM -0800
> Do myXGlobalLo myYGlobalLo give the same thing?   -- Ichiro

No - those are used for non-exch2 configurations.

-Andy


> 
> At 03:42 PM 3/30/2004 -0500, Chris Hill wrote:
> >Yes that is the loop.
> >For a 510x510 cube that will return global i {1:510*6} and global j 
> >{1:510}.
> >
> >
> >Chris
> >
> >> -----Original Message-----
> >> From: Ichiro Fukumori [mailto:if at pacific.jpl.nasa.gov]
> >> Sent: Tuesday, March 30, 2004 3:33 PM
> >> To: 'Andrew Eichmann'; Dimitris Menemenlis
> >> Cc: Chris Hill
> >> Subject: Re: conversion from local tile index to global new
> >> I/O format index
> >>
> >> Hi Andrew,
> >>
> >> Could you give me the exact do loop to get the global i (1 to
> >> Nx) and global j (1 to Ny) index at point, (i,j,bi,bj) within
> >> a tile?  Is it
> >>
> >> i_global_io_index = exch2_txglobalo(W2_myTileList(bi))+i-1
> >> j_global_io_index = exch2_tyglobalo(W2_myTileList(bi))+j-1
> >>
> >> Thanks,
> >> Ichiro
> >>
> >> At 02:14 PM 3/30/2004 -0500, 'Andrew Eichmann' wrote:
> >> >* Dimitris Menemenlis <menemenlis at jpl.nasa.gov> wrote on
> >> Tue, Mar 30,
> >> >2004 at 10:01:37AM -0800
> >> > >
> >> > > Chris, Andy,
> >> > >
> >> > > >          i_global_io_index =
> >> exch_tx_globallo(W2_myTileList(bi))+i-1
> >> > > >          j_global_io_index =
> >> > > > exch_ty_globallo(W2_myTileList(bi))+j-1
> >> > >
> >> > > is not exactly what we need.  Two problems, the first is that the
> >> > > exch_tx_globallo and exch_ty_globallo variables do not exist.  I
> >> > > assume you
> >> >
> >> >They're exch2_txglobalo and exch2_tyglobalo.  There's a
> >> mismatch in the
> >> >comments that we should clean up.
> >> >
> >> > > mean exch2.  The second problem is that these variables seem to
> >> > > point
> >> > to face
> >> > > corners, not tile corners.  So some more tile gymnastics must be
> >> > > needed
> >> > to get
> >> >
> >> >They should point to the tile corners within the face.  That, plus
> >> >exch2_mydnx, exch2_mydny (which I just realised I haven't
> >> documented -
> >> >these are dimensions of the faces, indexed to the tile), and
> >> >exch2_myFace should get you what you need.
> >> >
> >> > > P.P.S.  Anybody running the mitgcm using cygwin?
> >> >
> >> >Would this be for performance tuning? ;-)
> >> >
> >> >-A
> >>
> >> ===============================================================
> >> Ichiro Fukumori               | Jet Propulsion Laboratory
> >> e-mail: fukumori at jpl.nasa.gov | Mail Stop 300-323
> >> phone: +1 (818) 354-6965      | 4800 Oak Grove Drive
> >> fax: +1 (818) 393-6720        | Pasadena, California 91109, U.S.A.
> >> ===============================================================
> >>
> >
> >_______________________________________________
> >MITgcm-support mailing list
> >MITgcm-support at mitgcm.org
> >http://dev.mitgcm.org/mailman/listinfo/mitgcm-support
> 
> ===============================================================
> Ichiro Fukumori               | Jet Propulsion Laboratory
> e-mail: fukumori at jpl.nasa.gov | Mail Stop 300-323
> phone: +1 (818) 354-6965      | 4800 Oak Grove Drive
> fax: +1 (818) 393-6720        | Pasadena, California 91109, U.S.A.
> ===============================================================
> 
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