[Dune] UG grid problem: ID overflow DDD_HdrConstructor

[Eike Mueller]

Hi Oliver,

thanks a lot, that would be great. My desktop is a 32bit machine, where sizeof(long) = sizeof(int) = 4, so I'm not sure if 
recompiling everything with GID=long there will make a difference.

Eike

Oliver Sander wrote:
> Thanks for the backtrace.  I'll try and see whether I can reproduce the 
> crash
> on my machine. If that's not possible things will be a bit difficult :-)
> -- 
> Oliver
> 
> Am 26.11.2012 18:39, schrieb Eike Mueller:
>> Hi Markus and Oliver,
>>
>> to get to the bottom of this I recompiled everything (UG+Dune+my code) 
>> with -O0 -g, and that way I was able to get some more information out 
>> of the core dump. On 1 processor it runs fine now, but when running on 
>> 6, this is what I get, looks like it crashes in loadBalance(), but I 
>> can't make sense of what's happening inside UG. It always seems to 
>> crash inside ifcreate.c, either in line 482 or 489:
>>
>> Program terminated with signal 11, Segmentation fault.
>> #0  0x0000000000a438b0 in UG::D3::IFCreateFromScratch (tmpcpl=0x1462ad0,
>>     ifId=1) at if/ifcreate.c:489
>> 489                     ifHead->nItems++;
>> (gdb) backtrace
>> #0  0x0000000000a438b0 in UG::D3::IFCreateFromScratch (tmpcpl=0x1462ad0,
>>     ifId=1) at if/ifcreate.c:489
>> #1  0x0000000000a44dae in UG::D3::IFRebuildAll () at if/ifcreate.c:1059
>> #2  0x0000000000a44e71 in UG::D3::IFAllFromScratch () at 
>> if/ifcreate.c:1097
>> #3  0x0000000000a4bd89 in UG::D3::DDD_XferEnd () at xfer/cmds.c:869
>> #4  0x0000000000a65b5c in UG::D3::TransferGridFromLevel (theMG=0x1441880,
>>     level=0) at trans.c:835
>> #5  0x0000000000a5df4b in UG::D3::lbs (argv=0x7fffffffa390 "0",
>>     theMG=0x1441880) at lb.c:659
>> #6  0x0000000000a0bd83 in UG::D3::LBCommand (argc=4, argv=0x7fffffffab90)
>>     at commands.c:10658
>> #7  0x00000000004a1e2d in Dune::UG_NS<3>::LBCommand (argc=4,
>>     argv=0x7fffffffab90) at ../../../dune/grid/uggrid/ugwrapper.hh:979
>> #8  0x00000000004a8df9 in Dune::UGGrid<3>::loadBalance (this=0x134e490,
>>     strategy=0, minlevel=0, depth=2, maxLevel=32, minelement=1)
>>     at uggrid.cc:556
>> #9  0x00000000004077bf in Dune::UGGrid<3>::loadBalance (this=0x134e490)
>>     at 
>> /home/n02/n02/eike/work/Library/Dune2.2/include/dune/grid/uggrid.hh:738
>> #10 0x0000000000400928 in main (argc=3, argv=0x7fffffffb5a8)
>>     at testsphericalgridgenerator.cc:65
>>
>> but I sometimes also get:
>>
>> Core was generated by `./testsphericalgridgenerator 
>> sphericalshell_cube_6.dgf 4'.
>> Program terminated with signal 11, Segmentation fault.
>> #0  0x0000000000a438b0 in UG::D3::IFCreateFromScratch (tmpcpl=0x1462ad0,
>>     ifId=1) at if/ifcreate.c:482
>> 482                             ifAttr->nAB    = ifAttr->nBA   = 
>> ifAttr->nABA   = 0;
>> (gdb) backtrace
>> #0  0x0000000000a438b0 in UG::D3::IFCreateFromScratch (tmpcpl=0x1462ad0,
>>     ifId=1) at if/ifcreate.c:482
>> #1  0x0000000000a44dae in UG::D3::IFRebuildAll () at if/ifcreate.c:1049
>> #2  0x0000000000a44e71 in UG::D3::IFRebuildAll () at if/ifcreate.c:1057
>> #3  0x0000000000a4bd89 in UG::D3::DDD_XferEnd () at xfer/cmds.c:850
>> #4  0x0000000000a65b5c in UG::D3::TransferGridFromLevel (theMG=0x1441880,
>>     level=0) at trans.c:824
>> #5  0x0000000000a5df4b in UG::D3::lbs (argv=0x7fffffffa390 "0",
>>     theMG=0x1441880) at lb.c:644
>> #6  0x0000000000a0bd83 in UG::D3::LBCommand (argc=4, argv=0x7fffffffab90)
>>     at commands.c:10644
>> #7  0x00000000004a1e2d in Dune::UG_NS<3>::LBCommand (argc=0,
>>     argv=0x7fffffffa420) at ../../../dune/grid/uggrid/ugwrapper.hh:977
>> #8  0x00000000004a8df9 in Dune::UGGrid<3>::loadBalance (this=0x134e490,
>>     strategy=0, minlevel=0, depth=2, maxLevel=32, minelement=1)
>>     at uggrid.cc:554
>> #9  0x00000000004077bf in 
>> std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count 
>> (this=0x134e490, __in_chrg=<optimized out>)
>>     at /opt/gcc/4.6.3/snos/include/g++/bits/shared_ptr_base.h:550
>> #10 0x0000000000400928 in main (argc=0, argv=0x520)
>>     at testsphericalgridgenerator.cc:66
>>
>> I've tried different load balancing strategies, but for all I get a 
>> segfault.
>>
>> Cheers,
>>
>> Eike
>>
>>
>> Markus Blatt wrote:
>>> On Mon, Nov 26, 2012 at 01:57:15PM +0000, Eike Mueller wrote:
>>>> thanks a lot for the patch, unfortunately I still get a segfault 
>>>> when I run on HECToR.
>>>>
>>>
>>> I feared that, but it was still worth a shot. The change probably
>>> interferes with the memory allocation in ddd.
>>>
>>> Markus
>>
>>
> 


-- 
Dr Eike Mueller
Research Officer

Department of Mathematical Sciences
University of Bath
Bath BA2 7AY, United Kingdom

+44 1225 38 5633
e.mueller at bath.ac.uk
http://people.bath.ac.uk/em459/