-erik

On Mon, Dec 12, 2011 at 5:49 PM, Yosef Zlochower <yosef@astro.rit.edu> wrote:

On 12/12/2011 01:21 PM, Erik Schnetter wrote:

prolongation='none' is one of the possibilities; there are other
prolongation types, e.g. sync, restrict, or copy.

To find out what is going on, we need to find out which thorn called on
Carpet to interpolate in time for what reason. A stack backtrace or
similar information would be useful.

-erik

Here is the backtrace

Backtrace from rank 1 pid 32125:
1. /lib64/tls/libc.so.6 [0x2a97164300]
2. gdata::find_source_timelevel(std::vector<double, std::allocator<double> > const&, double, int, operator_type, int&, int&)(./cactus_lazev)
3. gdata::transfer_from(comm_state&, std::vector<gdata const*, std::allocator<gdata const*> > const&, std::vector<double, std::allocator<double> > const&, bbox<int, 3> const&, bbox<int, 3> const&, int, int, double, int, int)(./cactus_lazev)
4. ggf::transfer_from_all(comm_state&, int, int, int, std::vector<sendrecv_pseudoregion_t, std::allocator<sendrecv_pseudoregion_t> > const dh::fast_dboxes::*, std::vector<int, std::allocator<int> > const&, int, int, double const&, bool, bool)(./cactus_lazev)
5. ggf::recompose_fill(comm_state&, int, bool)(./cactus_lazev)
6. dh::recompose(int, bool)(./cactus_lazev)
7. gh::recompose(int, bool)(./cactus_lazev)
8. Carpet::Recompose(_cGH const*, int, bool)(./cactus_lazev)
9. ./cactus_lazev [0x10c01c5]
a. Carpet::Evolve(tFleshConfig*)(./cactus_lazev)
b. ./cactus_lazev(main+0x9f) [0x4eb0cf]
c. /lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x2a9715

On Mon, Dec 12, 2011 at 12:45 PM, Yosef Zlochower <yosef@astro.rit.edu
<mailto:yosef@astro.rit.edu>> wrote:

On 12/12/2011 12:11 PM, Erik Schnetter wrote:

Other causes for a timer interpolation may be a spatial
interpolation at
a time where the coarse grid does not exist, or a reduction
operation at
such a time (e.g. for scalar output).

I haven't declared it with prolongation=none, but I never interpolate
it, reduce it, or sync it.

How do you declare this variable? You may need to explicitly
tell Carpet
to leave this variable alone, or to report an error when such an
operation is attempted.

How do I do this?

-erik

On Mon, Dec 12, 2011 at 11:35 AM, Frank Loeffler
<knarf@cct.lsu.edu <mailto:knarf@cct.lsu.edu>
<mailto:knarf@cct.lsu.edu <mailto:knarf@cct.lsu.edu>>> wrote:

On Mon, Dec 12, 2011 at 10:32:55AM -0500, Yosef Zlochower wrote:
> -> Internal error: extrapolation in time.
variable=LAZEV::dotalp
> time=118.90625 times=[118.9375]
>
> I am unsure how the times could have gotten out of sync at such a
late
> time in the simulation without getting out of sync earlier. I
also
> do not understand why a time interpolation should have been
attempted
> in the first place. I don't sync or attempt to interpolate
this GF.

Do you regrid at that time? It might happen that in order to
regrid at
that particular time Carpet would need to interpolate in
time, and it
didn't do before because levels might have been lined up at
the time of
regridding.

Frank

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--
Dr. Yosef Zlochower
Center for Computational Relativity and Gravitation
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School of Mathematical Sciences
Rochester Institute of Technology
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Erik Schnetter <schnetter@cct.lsu.edu <mailto:schnetter@cct.lsu.edu>>
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--
Dr. Yosef Zlochower
Center for Computational Relativity and Gravitation
Assistant Professor
School of Mathematical Sciences
Rochester Institute of Technology
85 Lomb Memorial Drive
Rochester, NY 14623

Office:74-2067
Phone: +1 585-475-6103

yosef@astro.rit.edu

CONFIDENTIALITY NOTE: The information transmitted, including
attachments, is intended only for the person(s) or entity to which it
is addressed and may contain confidential and/or privileged material.
Any review, retransmission, dissemination or other use of, or taking
of any action in reliance upon this information by persons or entities
other than the intended recipient is prohibited. If you received this
in error, please contact the sender and destroy any copies of this
information.

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Erik Schnetter <schnetter@cct.lsu.edu> http://www.cct.lsu.edu/~eschnett/