[petsc-users] Memory leak in PetscRandom?

[Barry Smith]

   Thanks for the report. I ran the example with those options under Linux with valgrind and found no memory leaks, I cannot run valgrind on my Mac. I suspect the issue is related to some internal library memory problems on the Apple and is not in the PETSc library or that example.

   Barry

> On Feb 25, 2015, at 10:44 AM, Sascha Schnepp <mail at saschaschnepp.net> wrote:
> 
> Hello,
> 
> when I run ksp/ksp/examples/tutorials/ex2 through valgrind with random exact vector enabled (-random_exact_sol) it shows some lost memory. Patrick Sanan discovered this playing around with random positions of multiple inclusions for ex43 but that is in a fork/branch of his. The part of the valgrind output concerning the memory loss for ex2 with -random_exact_sol is identical.
> 
> Cheers,
> Sascha
> 
> sascha at geop-304 …/ksp/examples/tutorials [master ↓333|?19]
> 02/25/15 [17:29:26] $ valgrind --leak-check=full --dsymutil=yes  ./ex2 ./ex2 -ksp_monitor_short -m 5 -n 5 -ksp_gmres_cgs_refinement_type refine_always -random_exact_sol==68417== Memcheck, a memory error detector
> ==68417== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
> ==68417== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
> ==68417== Command: ./ex2 ./ex2 -ksp_monitor_short -m 5 -n 5 -ksp_gmres_cgs_refinement_type refine_always -random_exact_sol
> ==68417==
> --68417-- run: /usr/bin/dsymutil "./ex2"
> --68417-- run: /usr/bin/dsymutil "/Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libmpifort.12.dylib"
> --68417-- run: /usr/bin/dsymutil "/Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libmpicxx.12.dylib"
> --68417-- run: /usr/bin/dsymutil "/Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libmpi.12.dylib"
> --68417-- run: /usr/bin/dsymutil "/Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libpmpi.12.dylib"
>  0 KSP Residual norm 2.28401
>  1 KSP Residual norm 0.541581
>  2 KSP Residual norm 0.114601
>  3 KSP Residual norm 0.0109825
>  4 KSP Residual norm 0.00112854
>  5 KSP Residual norm 8.41066e-05
> Norm of error 9.07246e-05 iterations 5
> ==68417==
> ==68417== HEAP SUMMARY:
> ==68417==     in use at exit: 44,377 bytes in 387 blocks
> ==68417==   total heap usage: 1,999 allocs, 1,612 frees, 328,837 bytes allocated
> ==68417==
> ==68417== 1,060 bytes in 1 blocks are possibly lost in loss record 85 of 95
> ==68417==    at 0x66BB: malloc (vg_replace_malloc.c:300)
> ==68417==    by 0x234DFC3: __emutls_get_address (in /opt/local/lib/libgcc/libgcc_s.1.dylib)
> ==68417==
> ==68417== 2,080 (1,040 direct, 1,040 indirect) bytes in 1 blocks are definitely lost in loss record 92 of 95
> ==68417==    at 0x66BB: malloc (vg_replace_malloc.c:300)
> ==68417==    by 0x25175AE: atexit_register (in /usr/lib/system/libsystem_c.dylib)
> ==68417==    by 0x25176E9: __cxa_atexit (in /usr/lib/system/libsystem_c.dylib)
> ==68417==    by 0x1E3CC27: _GLOBAL__sub_I_initcxx.cxx (initcxx.cxx:110)
> ==68417==    by 0x7FFF5FC3D15F: ???
> ==68417==    by 0x1E3C28F: MPI::Datatype::Get_name(char*, int&) const (in /Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libmpicxx.12.dylib)
> ==68417==    by 0x10480D61F: ???
> ==68417==    by 0x7FFF5FC11C2D: ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) (in /usr/lib/dyld)
> ==68417==    by 0x7FFF5FC3D15F: ???
> ==68417==    by 0x100000011: ??? (in ./ex2)
> ==68417==    by 0x1E35297: ??? (in /Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libmpicxx.12.dylib)
> ==68417==    by 0x1E3555F: ??? (in /Users/sascha/Documents/codes/PETSc/petsc-dev/arch-osx-master-debug/lib/libmpicxx.12.dylib)
> ==68417==
> ==68417== LEAK SUMMARY:
> ==68417==    definitely lost: 1,040 bytes in 1 blocks
> ==68417==    indirectly lost: 1,040 bytes in 1 blocks
> ==68417==      possibly lost: 1,060 bytes in 1 blocks
> ==68417==    still reachable: 5,318 bytes in 15 blocks
> ==68417==         suppressed: 35,919 bytes in 369 blocks
> ==68417== Reachable blocks (those to which a pointer was found) are not shown.
> ==68417== To see them, rerun with: --leak-check=full --show-leak-kinds=all
> ==68417==
> ==68417== For counts of detected and suppressed errors, rerun with: -v
> ==68417== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 17 from 17)
> 
> <configure.log><make.log>