[petsc-users] Debugging with valgrind

[Medane TCHAKOROM]

Re:

Thanks for your prompts reply


On 08/02/2022 19:47, Barry Smith wrote:
>    Yes, these come from other packages or the OS so you cannot do anything about them.
>
>    Barry
>
>
>> On Feb 8, 2022, at 1:08 PM, Medane TCHAKOROM <medane.tchakorom at univ-fcomte.fr> wrote:
>>
>> Hello ,
>>
>> I have been debugging my code with valgrind, and found many memory leakage that i removed so far.
>>
>> But i keep having the type of lines in my logs
>>
>>
>> --------------------
>>
>> ==26817== 384 bytes in 1 blocks are still reachable in loss record 1,107 of 1,151
>> ==26817==    at 0x483877F: malloc (vg_replace_malloc.c:307)
>> ==26817==    by 0x67BC429: MPIR_T_CVAR_REGISTER_impl (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libmpi.so.12.1.8)
>> ==26817==    by 0x66D6B41: MPIR_T_cvar_init (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libmpi.so.12.1.8)
>> ==26817==    by 0x65D61F2: MPIR_T_cvar_env_init (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libmpi.so.12.1.8)
>> ==26817==    by 0x65D62AE: MPIR_T_env_init (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libmpi.so.12.1.8)
>> ==26817==    by 0x655D059: PMPI_Init_thread (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libmpi.so.12.1.8)
>> ==26817==    by 0x49BB19D: PetscInitialize (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libpetsc.so.3.14.2)
>> ==26817==    by 0x10B65E: main (in /home/mtchakorom/petsc-3.14.2/src/ksp/ksp/tutorials/code_multisplitting_async)
>> ----------
>>
>>
>> and this
>>
>>
>> ------------------------
>>
>>   65,536 bytes in 1 blocks are definitely lost in loss record 1,149 of 1,151
>> ==26817==    at 0x48386AF: malloc (vg_replace_malloc.c:306)
>> ==26817==    by 0x483ADE7: realloc (vg_replace_malloc.c:834)
>> ==26817==    by 0x87B284F: ???
>> ==26817==    by 0x87B9DF3: ???
>> ==26817==    by 0x8790778: ???
>> ==26817==    by 0x8796B87: ???
>> ==26817==    by 0x873C3E7: ???
>> ==26817==    by 0x76F66A2: ??? (in /usr/local/cuda-11.2/targets/x86_64-linux/lib/libOpenCL.so.1.0.0)
>> ==26817==    by 0x76F88CB: ??? (in /usr/local/cuda-11.2/targets/x86_64-linux/lib/libOpenCL.so.1.0.0)
>> ==26817==    by 0x72AF34E: __pthread_once_slow (pthread_once.c:116)
>> ==26817==    by 0x76F6C70: clGetPlatformIDs (in /usr/local/cuda-11.2/targets/x86_64-linux/lib/libOpenCL.so.1.0.0)
>> ==26817==    by 0x67F4409: hwloc_opencl_discover (in /home/mtchakorom/petsc-3.14.2/linux-gnu-debug/lib/libmpi.so.12.1.8)
>>
>> --------
>>
>>
>> Should i consider this as normal output for valgrind on a petsc program ?
>>
>>
>> Thanks
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