Hi all,
I have recently reinstalled Code_Saturne 4.0.8 with PT_Scotch support(6.0.4). When I ran a simulation with a mesh density of 22 million the results produced by the installation could not be read. Trying to restart the calculation i get the following error.
SIGSEGV signal (forbidden memory area access) intercepted!
Call stack:
1: 0x2af5c123917b <fvm_selector_create+0xc4b> (libsaturne.so.0)
2: 0x2af5c13330d7 <cs_mesh_init_selectors+0xb7> (libsaturne.so.0)
3: 0x2af5c10f1c05 <cs_preprocess_mesh+0x465> (libsaturne.so.0)
4: 0x2af5c1063c47 <cs_run+0x127> (libsaturne.so.0)
5: 0x2af5c1063a01 <main+0x111> (libsaturne.so.0)
6: 0x2af5c4148b35 <__libc_start_main+0xf5> (libc.so.6)
7: 0x401439 <> (cs_solver)
End of stack
Conversely with a smaller mesh density there are no issues.
I have attached the error outputs and listing files.
Any help is much appreciated
Code_Saturne4.0.8 results cannot be read or restarted
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kchinembiri
- Posts: 18
- Joined: Sun Feb 19, 2017 6:44 pm
Code_Saturne4.0.8 results cannot be read or restarted
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Yvan Fournier
- Posts: 4208
- Joined: Mon Feb 20, 2012 3:25 pm
Re: Code_Saturne4.0.8 results cannot be read or restarted
Hello,
Did the same case run "restarted" under a previous version ?
It is strange, as the error occurs during the preprocessing step, prior to restart, so If the error only occurs upon restart, I suspect a prior memory override bug occuring earlier.
Could you test a debug build (a build configured with "--enable-debug") ? This may catch and report errors earlier, making debugging easier (but is 2 to 3 times slower, so good for testing and seting up a simulation, then switching to a "standard" production build to run iterations).
Also, could you test if you have the same error not using any user subroutines (especially cs_user_parameters.f90; you other subroutines are called later, unless I missed something).
Best regards,
Yvan
Did the same case run "restarted" under a previous version ?
It is strange, as the error occurs during the preprocessing step, prior to restart, so If the error only occurs upon restart, I suspect a prior memory override bug occuring earlier.
Could you test a debug build (a build configured with "--enable-debug") ? This may catch and report errors earlier, making debugging easier (but is 2 to 3 times slower, so good for testing and seting up a simulation, then switching to a "standard" production build to run iterations).
Also, could you test if you have the same error not using any user subroutines (especially cs_user_parameters.f90; you other subroutines are called later, unless I missed something).
Best regards,
Yvan
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kchinembiri
- Posts: 18
- Joined: Sun Feb 19, 2017 6:44 pm
Re: Code_Saturne4.0.8 results cannot be read or restarted
Hi Yvan,
Thank you for replying.
The issue appears to have been linked to the method I used to install code_saturne.
Initially I was installing code_saturne with the automatic installer. The installation appeared
to progress correctly. But results generated by that installation, could not be read in paraview, as I would get a segmentation error and trying to restart the simulation would crash code saturne.
Installing code_saturne manually seems to have resolved some of the issues, I can now read the result in paraview and restart the case. I will try running for longer iterations and restarting the case to confirm everything still works.
I do not understand what caused the earlier issues but it seems to be working now.
Kind regards,
Kenneth
Thank you for replying.
The issue appears to have been linked to the method I used to install code_saturne.
Initially I was installing code_saturne with the automatic installer. The installation appeared
to progress correctly. But results generated by that installation, could not be read in paraview, as I would get a segmentation error and trying to restart the simulation would crash code saturne.
Installing code_saturne manually seems to have resolved some of the issues, I can now read the result in paraview and restart the case. I will try running for longer iterations and restarting the case to confirm everything still works.
I do not understand what caused the earlier issues but it seems to be working now.
Kind regards,
Kenneth