On 06.05.2012 14:27, Matthew Knepley wrote: > On Sun, May 6, 2012 at 7:28 AM, Alexander Grayver > <agrayver at gfz-potsdam.de <mailto:agrayver at gfz-potsdam.de>> wrote: > > Hello, > > I use KSP and random rhs to compute largest singular value: > > > 1) Is this the whole program? If not, this can be caused by memory > corruption somewhere else. This is what I suspect.
Matt, I can reproduce error using attached test programm and this matrix (7 mb): http://dl.dropbox.com/u/60982984/A.dat > > 2) You can put in CHKMEMQ; throughout the code to find exactly where > the memory corruption happens. > > Matt > > ! create solver and set options for singular value estimation > call KSPCreate(MPI_COMM_WORLD,ksp,ierr);CHKERRQ(ierr) > call KSPSetType(ksp,KSPGMRES,ierr);CHKERRQ(ierr) > call > > KSPSetTolerances(ksp,solvertol,PETSC_DEFAULT_DOUBLE_PRECISION,PETSC_DEFAULT_DOUBLE_PRECISION,its,ierr);CHKERRQ(ierr) > call KSPGMRESSetRestart(ksp, its, ierr);CHKERRQ(ierr) > call KSPSetComputeSingularValues(ksp, flg, ierr);CHKERRQ(ierr) > call KSPSetFromOptions(ksp,ierr);CHKERRQ(ierr) > > ! generate random RHS > call PetscRandomCreate(PETSC_COMM_WORLD,rctx,ierr) > call PetscRandomSetFromOptions(rctx,ierr) > call VecSetRandom(b,rctx,ierr) > > !no preconditioning > call KSPGetPC(ksp,pc,ierr);CHKERRQ(ierr) > call PCSetType(pc,PCNONE,ierr);CHKERRQ(ierr) > call KSPSetOperators(ksp,A,A,SAME_PRECONDITIONER,ierr);CHKERRQ(ierr) > !solve system > call KSPSolve(ksp,b,x,ierr);CHKERRQ(ierr) > call KSPComputeExtremeSingularValues(ksp, smax, smin, > ierr);CHKERRQ(ierr) > > call KSPDestroy(ksp,ierr);CHKERRQ(ierr) > > However it crashes: > > [1]PETSC ERROR: > ------------------------------------------------------------------------ > [1]PETSC ERROR: Caught signal number 11 SEGV: Segmentation > Violation, probably memory access out of range > [1]PETSC ERROR: Try option -start_in_debugger or > -on_error_attach_debugger > [1]PETSC ERROR: or see > http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[1]PETSC > ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X > to find memory corruption errors > [1]PETSC ERROR: PetscMallocValidate: error detected at > PetscDefaultSignalHandler() line 157 in > /home/lib/petsc-dev1/src/sys/error/signal.c > [1]PETSC ERROR: Memory at address 0x4aa3f00 is corrupted > [1]PETSC ERROR: Probably write past beginning or end of array > [1]PETSC ERROR: Last intact block allocated in KSPSetUp_GMRES() > line 73 in /home/lib/petsc-dev1/src/ksp/ksp/impls/gmres/gmres.c > [1]PETSC ERROR: --------------------- Error Message > ------------------------------------ > [1]PETSC ERROR: Memory corruption! > [1]PETSC ERROR: ! > [1]PETSC ERROR: > ------------------------------------------------------------------------ > [1]PETSC ERROR: Petsc Development HG revision: > f3c119f7ddbfee243b51907a90acab15127ccb39 HG Date: Sun Apr 29 > 21:37:29 2012 -0500 > [1]PETSC ERROR: See docs/changes/index.html for recent updates. > [1]PETSC ERROR: See docs/faq.html for hints about trouble shooting. > [1]PETSC ERROR: See docs/index.html for manual pages. > [1]PETSC ERROR: > ------------------------------------------------------------------------ > [1]PETSC ERROR: /home/prog on a openmpi-i named node207 by user > Sun May 6 12:58:24 2012 > [1]PETSC ERROR: Libraries linked from > /home/lib/petsc-dev1/openmpi-intel-complex-debug-f/lib > [1]PETSC ERROR: Configure run at Mon Apr 30 10:20:49 2012 > [1]PETSC ERROR: Configure options > --with-blacs-include=/opt/intel/Compiler/11.1/072/mkl/include > > --with-blacs-lib=/opt/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_blacs_openmpi_lp64.a > > --with-blas-lapack-lib="[/opt/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_intel_lp64.a,/opt/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_intel_thread.a,/opt/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_core.a,/opt/intel/Compiler/11.1/072/lib/intel64/libiomp5.a]" > --with-fortran-interfaces=1 > --with-mpi-dir=/opt/mpi/intel/openmpi-1.4.2 > --with-petsc-arch=openmpi-intel-complex-debug-f > --with-precision=double > --with-scalapack-include=/opt/intel/Compiler/11.1/072/mkl/include > > --with-scalapack-lib=/opt/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_scalapack_lp64.a > --with-scalar-type=complex --with-x=0 > PETSC_ARCH=openmpi-intel-complex-debug-f > [1]PETSC ERROR: > ------------------------------------------------------------------------ > [1]PETSC ERROR: PetscMallocValidate() line 138 in > /home/lib/petsc-dev1/src/sys/memory/mtr.c > [1]PETSC ERROR: PetscDefaultSignalHandler() line 157 in > /home/lib/petsc-dev1/src/sys/error/signal.c > > > Call stack from debugger: > > opal_memory_ptmalloc2_int_free, FP=7fffd4765300 > opal_memory_ptmalloc2_free_hook, FP=7fffd4765330 > PetscFreeAlign, FP=7fffd4765370 > PetscTrFreeDefault, FP=7fffd4765520 > KSPReset_GMRES, FP=7fffd4765740 > KSPReset, FP=7fffd4765840 > KSPDestroy, FP=7fffd47659a0 > kspdestroy_, FP=7fffd47659d0 > > > Any ideas? > > Thanks. > > -- > Regards, > Alexander > > > > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which > their experiments lead. > -- Norbert Wiener -- Regards, Alexander -------------- next part -------------- An HTML attachment was scrubbed... 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