Re: NCL hangs

From: Mary Haley <haley_at_nyahnyahspammersnyahnyah>
Date: Mon, 27 Jul 2009 08:08:27 -0600 (MDT)

Hi Oliver,

Thanks for the detailed information and scripts/data. I'll take a look
later this morning.

--Mary

On Mon, 27 Jul 2009 Oliver.Fuhrer_at_meteoswiss.ch wrote:

> Hi all!
>
> I'm trying to compute some power spectra of kinetic energy from model
> output. I use NCL to compute the spectra and save the results in an
> ASCII file. No graphics are done. I run the script over several hours of
> model output and average the results. If I run the time loop only over
> one or two hours (setting the variable hstop=6 or 7 in the script) the
> script runs fine. If I let the loop run over the full forecast starting
> at +6h up to +24h (by setting hstop=24) NCL simply hangs and doesn't
> continue. Looking at "top" on the machine, NCL is using 100% CPU. This
> should not be a memory issue, as according to "top" NCL is using only
> ~100 MB and the node has 8GB available. The 3 fields that are read in
> from the Grib1 file have the dimensions 520x350x60.
>
> Thanks for any help,
> Oli
>
> - I've attached the script to this email
>
> - I am using the following NCL version...
>
> 5.1.1
>
> - I am running on the following machine...
>
> Linux buin2 2.6.5-7.283-ss #4 SMP Fri Sep 28 13:24:48 PDT 2007 x86_64
> x86_64 x86_64 GNU/Linux
>
> - The example (including code, data and grib tables) can be found
> here...
>
> https://twiki.cscs.ch/twiki/bin/viewfile/Main/OliverFuhrerDownloads?rev=
> 1;filename=ncl_bug.tar.gz
>
> - Instructions to run...
>
>> /bin/tcsh
>> cd ncl_bug
>> source setenv.csh
>> ncl comp_spec.ncl
>
> - The script gives the following output when running into the hang...
>
> ...
> (0) debug 60
> (0) debug 70
> (0) debug 80
> (0) debug 90
> (0) Opening file data/lfff00230000
> warning:NclGRIB: Unknown grib parameter ...
> warning:NclGRIB: Unknown grib parameter ...
> warning:NclGRIB: Unknown grib parameter ...
> warning:NclGRIB: Unknown grib parameter ...
> warning:NclGRIB: Unknown grib parameter ...
> warning:NclGRIB: Unknown grib parameter ...
> (0) working on direction E-W
> (0) detrending and tapering
> (0) computing FFT
> (0) computing kinetic energy density
> (0) debug 10
> (0) debug 20
> (0) debug 30
> (0) debug 40
> (0) debug 50
> (0) debug 60
> (0) debug 70
> (0) debug 80
> (0) working on direction N-S
> (0) detrending and tapering
> (0) computing FFT
> (0) computing kinetic energy density
> (0) debug 10
> (0) debug 20
> (0) debug 30
> (0) debug 40
> (0) debug 50
> (0) debug 60
> (0) debug 70
> (0) debug 80
> (0) debug 90
>
>
> ________________________________________
>
> Oliver Fuhrer
> Numerical Models
>
> Federal Departement of Home Affairs FDHA
> Federal Office of Meteorology and Climatology MeteoSwiss
>
> Kraehbuehlstrasse 58, P.O. Box 514, CH-8044 Zurich, Switzerland
>
> Tel. +41 44 256 93 59
> Fax +41 44 256 92 78
> oliver.fuhrer_at_meteoswiss.ch
> www.meteoswiss.ch - First-hand information
>
>
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Received on Mon Jul 27 2009 - 08:08:27 MDT

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