[MITgcm-support] segmentation fault
Andreas Klocker
andreas.klocker at utas.edu.au
Sun May 20 19:07:55 EDT 2018
Dimitris,
I've done many runs with obcs cut-out from a global setup, but never had
this issue before. So I don't think other setups would help me much, but
they might be of use to others.
My code directory is pretty simple, there's hardly anything changed in
there and the same code directory (apart from changes in the size of the
vertical grid) have been used successfully before.
How do I compile and link with array-bound checks turned on? I haven't
tried that before...
cheers,
Andreas
On 18/05/18 23:04, Dimitris Menemenlis wrote:
> Andreas, I have done something similar quite a few times (i.e., increase
> horizontal and/or vertical resolution in regional domains with obcs
> cut-out from a global set-up) and did not have same issue. If helpful I
> can dig out and commit to contrib some examples that you can compare
> your set-up against. Actually, you remind me that I already promised to
> do this for Gael but that it fell off the bottom of my todo list :-(
>
> Do you have any custom routines in your "code" directory? Have you
> tried compiling and linking with array-bound checks turned on?
>
> Dimitris Menemenlis
> On 05/17/2018 11:45 PM, Andreas Klocker wrote:
> > Matt,
> >
> > I cut all the unnecessary packages and still have the same issue.
> >
> > I also checked 'size mitgcmuv' and compared the size to other runs
> which
> > work - it asks for about half the size of other runs which work fine
> > (same machine, same queue, same compiling options, etc).
> >
> > The tiles are already down to 32x32 grid points, and I'm happily
> running
> > configurations with a tile size almost twice as big and the same amount
> > of vertical layers.
> >
> > I will try some different tile sizes but I think the problem must be
> > somewhere else..
> >
> > Andreas
> >
> >
> >
> >
> > On 18/05/18 00:35, Matthew Mazloff wrote:
> >> Sounds like a memory issue. I think your executable has become too big
> >> for you machine. You will need to reduce tile size or do something
> >> else (e.g. reduce number of diagnostics or cut a package)
> >>
> >> and check
> >> size mitgcmuv
> >> to get a ballpark idea of how much memory you are requesting
> >>
> >> Matt
> >>
> >>
> >>
> >>> On May 16, 2018, at 11:27 PM, Andreas Klocker
> >>> <andreas.klocker at utas.edu.au <mailto:andreas.klocker at utas.edu.au>>
> wrote:
> >>>
> >>> Hi guys,
> >>>
> >>> I've taken a working 1/24 degree nested simulation (of Drake Passage)
> >>> with 42 vertical layers and tried to increase the vertical layers
> to 150
> >>> (without changing anything else apart from obviously my boundary files
> >>> for OBCS and recompiling with 150 vertical layers). Suddenly I get the
> >>> following error message:
> >>>
> >>> forrtl: severe (174): SIGSEGV, segmentation fault occurred
> >>> Image PC Routine Line Source
> >>> libirc.so
> <http://libirc.so>
> <http://libirc.so
> <http://libirc.so>>
> 00002BA1704BC2C9 Unknown
> >>> Unknown Unknown
> >>> libirc.so
> <http://libirc.so>
> <http://libirc.so
> <http://libirc.so>>
> 00002BA1704BAB9E Unknown
> >>> Unknown Unknown
> >>> libifcore.so.5 00002BA1722B5F3F Unknown Unknown Unknown
> >>> libifcore.so.5 00002BA17221DD7F Unknown Unknown Unknown
> >>> libifcore.so.5 00002BA17222EF43 Unknown Unknown Unknown
> >>> libpthread.so.0 00002BA1733B27E0 Unknown Unknown Unknown
> >>> mitgcmuv_drake24_ 00000000004E61BC mom_calc_visc_ 3345
> mom_calc_visc.f
> >>> mitgcmuv_drake24_ 0000000000415127 mom_vecinv_ 3453 mom_vecinv.f
> >>> mitgcmuv_drake24_ 0000000000601C33 dynamics_ 3426 dynamics.f
> >>> mitgcmuv_drake24_ 0000000000613C2B forward_step_ 2229
> forward_step.f
> >>> mitgcmuv_drake24_ 000000000064581E main_do_loop_ 1886
> main_do_loop.f
> >>> mitgcmuv_drake24_ 000000000065E500 the_main_loop_ 1904
> the_main_loop.f
> >>> mitgcmuv_drake24_ 000000000065E6AE the_model_main_ 2394
> >>> the_model_main.f
> >>> mitgcmuv_drake24_ 00000000005C6439 MAIN__ 3870 main.f
> >>> mitgcmuv_drake24_ 0000000000406776 Unknown Unknown Unknown
> >>> libc.so.6 00002BA1737E2D1D Unknown Unknown Unknown
> >>> mitgcmuv_drake24_ 0000000000406669 Unknown Unknown Unknown
> >>>
> >>> First this error pointed to a line in mom_calc_visc.f on which
> >>> calculations regarding the Leith viscosity are done. As a test I then
> >>> used a Smagorinsky viscosity instead and now it crashes with the same
> >>> error, but pointing to a line where Smagorinsky calculations are
> done. I
> >>> assume I must be chasing a way more fundamental problem than one
> related
> >>> to these two viscosity choices...but I'm not sure what this might
> be....
> >>>
> >>> Has anyone got any idea of what could be going wrong here?
> >>>
> >>> Thanks in advance!
> >>>
> >>> Andreas
> >>>
> >>>
> >>>
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> >
> > --
> > ===============================================================
> > Dr. Andreas Klocker
> > Physical Oceanographer
> >
> > ARC Centre of Excellence for Climate System Science
> > &
> > Institute for Marine and Antarctic Studies
> > University of Tasmania
> > 20 Castray Esplanade
> > Battery Point, TAS
> > 7004 Australia
> >
> > M: +61 437 870 182
> > W:http://www.utas.edu.au/profiles/staff/imas/andreas-klocker
> <http://www.utas.edu.au/profiles/staff/imas/andreas-klocker>
> > skype: andiklocker
> > ===============================================================
> >
> >
> >
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--
===============================================================
Dr. Andreas Klocker
Physical Oceanographer
ARC Centre of Excellence for Climate System Science
&
Institute for Marine and Antarctic Studies
University of Tasmania
20 Castray Esplanade
Battery Point, TAS
7004 Australia
M: +61 437 870 182
W: http://www.utas.edu.au/profiles/staff/imas/andreas-klocker
skype: andiklocker
===============================================================
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