============ Changes: 3.7 ============ .. rubric:: General: - -log_summary is deprecated, you should use -log_view - PetscViewerSetFormat() is deprecated, you should use PetscViewerPushFormat() followed after the viewing with PetscViewerPopFormat() - PetscMemoryShowUsage() and -memory_info changed to PetscMemoryView() and -memory_view - PetscOptionsSetValue() may now be called BEFORE PetscInitialize() and any options set then will be used in the initialization process. These options are overwritten by command line options. - The following routines now take an optional *PetscOptions* object as the first argument, use NULL to get the previous behavior. :: PetscOptionsHasName(PetscOptions,const char[],const char[],PetscBool *); PetscOptionsGetInt(PetscOptions,const char[],const char [],PetscInt *,PetscBool *); PetscOptionsGetBool(PetscOptions,const char[],const char [],PetscBool *,PetscBool *); PetscOptionsGetReal(PetscOptions,const char[],const char[],PetscReal *,PetscBool *); PetscOptionsGetScalar(PetscOptions,const char[],const char[],PetscScalar *,PetscBool *); PetscOptionsGetIntArray(PetscOptions,const char[],const char[],PetscInt[],PetscInt *,PetscBool *); PetscOptionsGetRealArray(PetscOptions,const char[],const char[],PetscReal[],PetscInt *,PetscBool *); PetscOptionsGetScalarArray(PetscOptions,const char[],const char[],PetscScalar[],PetscInt *,PetscBool *); PetscOptionsGetBoolArray(PetscOptions,const char[],const char[],PetscBool [],PetscInt *,PetscBool *); PetscOptionsGetString(PetscOptions,const char[],const char[],char[],size_t,PetscBool *); PetscOptionsGetStringArray(PetscOptions,const char[],const char[],char*[],PetscInt*,PetscBool *); PetscOptionsGetEList(PetscOptions,const char[],const char[],const char*const*,PetscInt,PetscInt*,PetscBool *); PetscOptionsGetEnum(PetscOptions,const char[],const char[],const char*const*,PetscEnum*,PetscBool *); PetscOptionsGetEnumArray(PetscOptions,const char[],const char[],const char*const*,PetscEnum*,PetscInt *,PetscBool *); PetscOptionsSetAlias(PetscOptions,const char[],const char[]); PetscOptionsSetValue(PetscOptions,const char[],const char[]); PetscOptionsClearValue(PetscOptions,const char[]); PetscOptionsAllUsed(PetscOptions,PetscInt*); PetscOptionsUsed(PetscOptions,const char *,PetscBool*); PetscOptionsView(PetscOptions,PetscViewer); PetscOptionsInsert(PetscOptions,int*,char ***,const char[]); PetscOptionsInsertFile(MPI_Comm,PetscOptions,const char[],PetscBool ); PetscOptionsInsertString(PetscOptions,const char[]); PetscOptionsPrefixPush(PetscOptions,const char[]); PetscOptionsReject(PetscOptions,const char[],const char[]); PetscOptionsGetAll(PetscOptions,char*[]); - PetscLogBegin() is now PetscLogDefaultBegin(). .. rubric:: Configure/Build: - Added --download-packages-dir=directory to support easy use of --download-xxx behind firewalls - --download-package for externalpackage with a gitrepo will never be stale. Each time configure is invoked - it will do a 'git fetch' and 'git checkout commit-id'. And if the commit-id changes from the previous build - the package will be rebuilt. To prevent this sync [and use previous snapshot] - one can use --download-package-commit=HEAD - Added --with-libpng/--with-giflib/--with-libjpeg and cooresponding --download versions to support PNG/GIF/JPEG image generation - Removed support for AfterImage in favor of libpng/GIFLIB/libjpeg .. rubric:: IS: .. rubric:: PetscDraw: - Added option -draw_cmap to use a named colormap (e.g., hue (default), jet, coolwarm, parula, viridis) in the drawing of contour plots. - Support for saving images and movies was improved. Support for generating binary PPM images is built-in, but the format is uncompressed and images are large (640x480 pixels ~ 900 KiB). PETSc can optionally generate PNG/GIF/JPEG images using the libpng/GIFLIB/libjpeg packages (configure --with-package/--download-package). These libraries are popular, well maintained, and available through most packages managers (dnf/yum, apt, brew). For most users, PNG images should be enough. - Added routine PetscDrawSave(), users should explicitly call it to save images after configuring with PetscDrawSetSave(). - The PetscDrawSynchronizedXXX() routines were removed, the corresponding PetscDrawXXX() are now collective. .. rubric:: PF: .. rubric:: Vec: - For complex numbers VecNorm(v,NORM_1,) will return the traditional 1 norm of the 2 norm of the complex numbers; that is the 1 norm of the absolute values of the complex entries. Previously it returned the 1 norm of the 1 norm of the complex entries (what is returned by the BLAS routine asum()). Both are valid norms but most people expect the former. .. rubric:: VecScatter: .. rubric:: PetscSection: .. rubric:: Mat: .. rubric:: PC: - If the DM has a CreateRestriction() function the PCMG automatically uses that to create the restriction operator instead of defaulting to using the transpose of the interpolation - Added -pc_hypre_boomeramg_nodal_coarsen - where n is from 1 to 6 (see HYPRE_BOOMERAMGSetNodal()) - Added -pc_hypre_boomeramg_vec_interp_variant where v is from 1 to 4 (see HYPRE_BoomerAMGSetInterpVecVariant()) - see PCHYPRE to allow taking advantage of MatSetNearNullSpace() for hypre BoomerAMG - Added PCTelescope which supports running solvers on sub-communicators. This PC allows re-partitioning of coarse levels solves within PCMG when using Galerkin coarse level operators. .. rubric:: KSP: - KSPSetMonitor(KSPMonitorXXX, calls now require passing a viewer as the final argument, you can no longer pass a NULL) - -ksp_monitor_solution now takes arguments of the form [viewertype[:filename[:formatoption]]] allowing viewing the solution in many ways. To get back the previous behavior use -ksp_monitor_solution draw - A Flexible Conjugate Gradient (FCG) implementation has been added as KSPFCG. - New implementations for pipelined, flexible Krylov methods have been added as KSPPIPEFGMRES, KSPPIPEFCG, and KSPPIPEGCR. .. rubric:: SNES: - SNESSetMonitor(SNESMonitorXXX, calls now require passing a viewer as the final argument, you can no longer pass a NULL) - -snes_monitor_solution/residual/solution_update now takes arguments of the form [viewertype[:filename[:formatoption]]] allowing viewing the solution in many ways. To get back the previous behavior use -ksp_monitor_solution draw .. rubric:: SNESLineSearch: - -snes_linesearch_monitor now takes an optional [:filename] arguement, changed SNESLineSearchSet/GetMonitor to SNESLineSearchSet/GetDefaultMonitor - Added SNESLineSearchMonitorSet() - Partial support for -snes_linesearch_monitor_solution_update .. rubric:: TS: - You must call TSSetExactFinalTime() or use the option -ts_exact_final_time before calling TSSolve() - TSSetMonitor(TSMonitorXXX, calls now require passing a viewer as the final argument, you can no longer pass a NULL) - -ts_monitor_solution now takes arguments of the form [viewertype[:filename[:formatoption]]] allowing viewing the solution in many ways. To get back the previous behavior use -ksp_monitor_solution draw - -ts_monitor_binary_solution filename should now be written as -ts_monitor_solution binary:filename - Renamed TSSetEventMonitor() to TSSetEventHandler(). Updated many TS implementations to support event detection. - Updated TSTHETA, TSBEULER, and TSCN to support time adaptivity by estimating the local truncation error with a BDF-2 formula. - Updated TSALPHA implementation. Removed TSAlphaSetAdapt() and TSAlphaAdaptDefault(), use TSAlphaUseAdapt() instead. - Added TSBDF, an implementation of backward difference formulas using constant order (1 to 6) and supporting time adaptivity. - Implemented new interface for second-order systems to avoid using a first-order system formulation. Added TSALPHA2 implementation (generalized-alpha, Chung & Hubert 1993) featuring user-controlled damping of high-frequency modes and time adaptivity through a BDF-2 formula. .. rubric:: DM/DA: - Added DMShellSetCreateRestriction - Added the generic option prefix interfaces: DMGetOptionsPrefix(), DMAppendOptionsPrefix() - DMLabel labels are now available to all DM objects, not just DMPlex object - DMClone() now handles copying the coordinates, so that DMCopyCoordinates() is no longer necessary .. rubric:: DMPlex: .. rubric:: PetscViewer: - Replaced PetscViewerASCIISynchronizedAllow() with PetscViewerASCIIPushSynchronized() PetscViewerASCIIPopSynchronized() .. rubric:: SYS: .. rubric:: Tao: - Removed convergence tolerances -tao_fatol and tao_frtol also remove these two parameters from TAOSetTolerance() and TaoGetTolerance() .. rubric:: AO: .. rubric:: Sieve: .. rubric:: Fortran: