[MITgcm-support] Changing the number of cores in ECCOv4

Mon Dec 19 10:40:46 EST 2016

Hi Dan,
please try sNx=sNy=15, nPx=360, and nPy=1 which should give SIZE.h+blankList=360+108=468=4*117
Cheers,
Gael

On Dec 17, 2016, at 4:18 AM, Dan Jones <dcjones.work at gmail.com> wrote:

> Hi Gael,
> 
> As I mentioned, the nprocs=192 case is working, but I am having trouble with the nprocs=384 case.  In SIZE.h, I set sNx=sNy=15, nPx=192, and nPy=2.  In data.exch2, I uncommented the 'blankList' entry for the 15x15 case:
> 
> http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/input/data.exch2?view=markup
> 
> (BTW, the comment for the 15x15 case lists nprocs=360 - is that a typo, or have I missed something obvious?  I guess it should be nprocs=384.)
> 
> Here's the run-time error:
>  STOP ABNORMAL END: S/R W2_SET_MAP_TILES
> 
> (PID.TID 0000.0001) *** ERROR *** W2_SET_MAP_TILES: Domain Total # of tiles =   468 does
> 
> 
> (PID.TID 0000.0001) *** ERROR *** W2_SET_MAP_TILES:  not match (SIZE.h+blankList)=   492
> 
> What am I missing?  Thanks again for the help.
> 
> Best,
> Dan
> 
> 
> On Thu, Dec 15, 2016 at 5:00 PM, <mitgcm-support-request at mitgcm.org> wrote:
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>    1. Changing the number of cores in ECCOv4 (Dan Jones)
>    2. Re: Changing the number of cores in ECCOv4 (gael forget)
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> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 15 Dec 2016 13:02:51 +0000
> From: Dan Jones <dcjones.work at gmail.com>
> To: mitgcm-support at mitgcm.org
> Subject: [MITgcm-support] Changing the number of cores in ECCOv4
> Message-ID:
>         <CAPj3iHTghBD9xBXdg3JToTFk3NkqTaq61ZNS8eYqJQxgbSrbRQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Hi all,
> 
> I'm running ECCOv4, and I would like to double the number of cores.  I
> haven't used exch2 before, so I'm not sure how to do that.
> 
> I've read this discussion thread:
> http://mitgcm.org/pipermail/mitgcm-support/2014-December/009660.html
> 
> So I believe that I should set nPx=192 in SIZE.h, but I'm not sure what
> else needs to be changed.  I'm used to conserving the total number of grid
> points (by changing sNx and sNy), but I'm not sure how exch2 handles that.
> 
> I'm also not sure what to do in data.exch2.  I've uncommented the
> 'blankList' for nprocs=192 and commented out the 'blankList' for
> nprocs=96.  Is there anything else?
> 
> Thanks in advance, exch2 experts!
> 
> -Dan
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> ------------------------------
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> Message: 2
> Date: Thu, 15 Dec 2016 09:34:16 -0500
> From: gael forget <gforget at mit.edu>
> To: mitgcm-support at mitgcm.org
> Subject: Re: [MITgcm-support] Changing the number of cores in ECCOv4
> Message-ID: <6F89820D-9735-41AD-9790-98704EAC2510 at mit.edu>
> Content-Type: text/plain; charset="windows-1252"
> 
> Hi Dan,
> you seem to be on the right track. Unless I forget something all you want to do is indeed
> - change sNx & nPx jointly, e.g., to make them 15 & 192 in http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/code/SIZE.h?view=markup
> - uncomment the 'blankList? line for nprocs=192 and comment out the one for nprocs=96 in http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/ECCO_v4_r2/input/data.exch2?view=markup
> Cheers,
> Gael
> 
> 
> 
> 
> On Dec 15, 2016, at 8:02 AM, Dan Jones <dcjones.work at gmail.com> wrote:
> 
> > Hi all,
> >
> > I'm running ECCOv4, and I would like to double the number of cores.  I haven't used exch2 before, so I'm not sure how to do that.
> >
> > I've read this discussion thread:
> > http://mitgcm.org/pipermail/mitgcm-support/2014-December/009660.html
> >
> > So I believe that I should set nPx=192 in SIZE.h, but I'm not sure what else needs to be changed.  I'm used to conserving the total number of grid points (by changing sNx and sNy), but I'm not sure how exch2 handles that.
> >
> > I'm also not sure what to do in data.exch2.  I've uncommented the 'blankList' for nprocs=192 and commented out the 'blankList' for nprocs=96.  Is there anything else?
> >
> > Thanks in advance, exch2 experts!
> >
> > -Dan
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
> 
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