Hi Werner,
Thanks for this bug report that pins things down for us. We had
one earlier bug report on matlab, but our local matlab was an earlier
matlab, and so we couldn't reproduce the bug.
I've now moved to a local cluster here that has a more recent matlab.
(Kapil and others, if you want to reproduce the bug, try it on the
'discovery' cluster at the university.)
I can now reproduce the bug. When I run:
gdb --args bin/dmtcp_launch matlab -nodisplay -nojvm
it appears to hang. But then I type ^C to interrupt, and 'where' to
see the stack. From there, I'm seeing a call to std::terminate()
from within eh_terminate.cc (C++ standard library: exception
handler: terminate). This calls ' boost::call_once()' which then hangs.
So, something in 'matlab' created a C++ exception that couldn't be
handled.
Is this consistent with what you're seeing? Either way, I'll look more
deeply into this.
Thanks for the bug report,
- Gene
On Mon, Dec 01, 2014 at 11:54:37AM +0100, Werner Hack wrote:
> Hi all,
>
> I want to use dmtcp with matlab.
> I have dmtcp 2.3.1 installed but problems using it with newer releases of
> matlab.
> For testing I used a simple script with a counter in a loop which prints its
> result
> to the display (like your testprogram dmtcp1).
>
> Using matlab R2012a it seems to work.
> I can create checkpoints and the counter is printed to the display.
> Restarting from checkpoint continues counting as expected.
>
> But using matlab R2012b and above no output is printed anymore.
> I also tried to print to a file but same result.
> A checkpoint can be done but is useless in this context.
>
> Is this a known issue?
> Or have you an idea what goes wrong here?
>
> Any hint will be appreciated.
> Regards
> Werner
>
> #-------------------------------------------------------------------------------
> Output from dmtcp_coordinator while doing a checkpoint:
>
> [20384] NOTE at dmtcp_coordinator.cpp:1271 in startCheckpoint;
> REASON='starting checkpoint,
> suspending all nodes'
> s.numPeers = 1
> [20384] NOTE at dmtcp_coordinator.cpp:1273 in startCheckpoint;
> REASON='Incremented Generation'
> compId.generation() = 3
> [20384] NOTE at dmtcp_coordinator.cpp:615 in updateMinimumState;
> REASON='locking all nodes'
> [20384] NOTE at dmtcp_coordinator.cpp:621 in updateMinimumState;
> REASON='draining all nodes'
> [20384] NOTE at dmtcp_coordinator.cpp:627 in updateMinimumState;
> REASON='checkpointing all nodes'
> [20384] NOTE at dmtcp_coordinator.cpp:641 in updateMinimumState;
> REASON='building name service database'
> [20384] NOTE at dmtcp_coordinator.cpp:657 in updateMinimumState;
> REASON='entertaining queries now'
> [20384] NOTE at dmtcp_coordinator.cpp:662 in updateMinimumState;
> REASON='refilling all nodes'
> [20384] NOTE at dmtcp_coordinator.cpp:693 in updateMinimumState;
> REASON='restarting all nodes'
>
> #-------------------------------------------------------------------------------
> Output from dmtcp_launch while doing a checkpoint:
>
> [95000] NOTE at writeckpt.cpp:513 in preprocess_special_segments;
> REASON='bottom-most page of stack
> (page with highest address) was
> invisible in /proc/self/maps. It is made visible again now.'
>
>
> --
>
> -----------------------------------------------------------------------
> Werner Hack
> Universität Ulm
> Institut für Nachrichtentechnik
> -----------------------------------------------------------------------
>
>
> ------------------------------------------------------------------------------
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