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Dear PETSc Development Team,</div>
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I hope this message finds you well.</div>
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I am writing to seek your technical assistance regarding two related issues I have encountered while using PETSc in my application.</div>
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## 1. Memory Accumulation Issue</div>
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My application experiences gradual memory accumulation when performing multiple successive simulations. I've observed that PETSc objects (vectors, matrices, etc.) are not being completely cleaned up between simulation runs, even though I call the appropriate
destroy functions.</div>
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Could you please advise:</div>
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- Are there any known issues with memory accumulation in repeated PETSc usage scenarios?</div>
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- What would be the recommended approach to ensure complete cleanup between multiple simulation cycles?</div>
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- Are there any internal cleanup routines that should be called periodically?</div>
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## 2. Undefined Reference to `petscgarbagecleanup_`</div>
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While investigating the memory issue, I came across references to the `petscgarbagecleanup_` function in documentation, which appears to be tagged as a "developer" function. However, I'm unable to link against this function in my build.</div>
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Here's what I've tried:</div>
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- Verified PETSc installation and basic functionality</div>
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- Checked for the symbol in libpetsc.so using `nm -gA` - the function is not present</div>
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- Tried rebuilding PETSc with `--with-debugging=0` configuration option</div>
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- Ensured proper compiler and environment consistency</div>
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My environment:</div>
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- PETSc Version: 3.23</div>
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- Operating System: Ubuntu</div>
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- Compiler: Intel OneAPI with MPI and MKL</div>
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- Installation Method: Source Code from git</div>
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- Configuration options used: ./configure --with-cc=mpicc --with-cxx=mpicxx --with-fc=mpiifort --prefix=/home/icer/petsc-3.23 --with-scalar-type=complex --download-slepc=yes --download-mumps=yes --with-scalapack-dir=$MKLROOT --download-parmetis=yes --download-metis=yes
--download-arpack=yes --force --with-debugging=0</div>
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Questions:</div>
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- Is `petscgarbagecleanup_` a function that requires special configuration flags to be available?</div>
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- Are there alternative functions or approaches to force comprehensive garbage collection in PETSc?</div>
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- Could this be related to my specific PETSc configuration?</div>
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I would greatly appreciate any insights or suggestions you might have on resolving these issues. The memory accumulation is particularly critical for my long-running application workflows.</div>
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Thank you for your time and assistance.</div>
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Best regards,</div>
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Lei Wang</div>
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