[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: 960411: "ncvarput: xdr_NC_fill"

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: Re: 960411: "ncvarput: xdr_NC_fill"
  • Date: Thu, 11 Apr 96 16:56:35 -0600
John,

>Date: Thu, 11 Apr 1996 16:56:46 -0400 (EDT) 
>From: address@hidden (John Sheldon)
>Organization: NOAA/GFDL
>Subject: Re: 960411: "ncvarput: xdr_NC_fill" 
>Keywords: 199603281505.AA27313

In the above message you wrote:

> > Please let me know if this fixes your problem.
> 
> I made that change and it did the trick! -- can't say as I have a solid
> understanding of where things went wrong, but at least things are up
> and running.  Thanks!
> 
> Now, the bad news (sorta) - remember I mentioned a while back that I
> saw a large increase in CP time with prefill turned on?  Well, that's
> still happening.  Here's an example:
>                                           From "time":
>                                         ----------------
>       NETCDF_FFIOSPEC                    CP     Sys   Wall     ls -l
> ------------------------------          ------- ------- ----    --------
> cache:32:66 (With prefill)          123.8174u 6.6852s 2:43    46659904
> 
> cache:32:66 (No prefill)              2.2253u 0.7482s 0:26    46659792
> 
> Any intuitive leaps about this one??

Sorry, no.  I'm not a CRAY expert (or novice even) and must defer to 
people like Kuehn.  I've CC'd him on this message.  Hopefully, he'll
have something to say.

> > FYI, our UNICOS 8 CRAYs handle the value -32768.
> 
> That *really* puzzles me! Any idea what could be causing that?  We're
> running UNICOS 8.0.4 - do you have a later version?

(I thought you were running UNICOS 7?)

Anyway, I spoke too soon.  I based my pronouncement on the fact that the
CRAYs can represent -32768 in a short.  In actuality, your CDL file
causes our ncgen(1) to crash just like yours.

--------
Steve Emmerson   <address@hidden>