• Added "options" input argument for the driver routines. This structure contains all the parameter settings.
  You can call the routine

  set_default_options()

  to set the default values.
• Added "stat" output argument for the driver routines. This structure contains all the statistics collected at run-time.
• The driver routines xGSSV/xGSSVX have new interfaces reflecting the above changes.
  See an example EXAMPLE/dlinsol.c
• Added more examples in EXAMPLE/ directory. See README in that directory.
• Added a "symmetric mode" which gives better performance when the matrix is or diagonally heavy, or symmetric and/or positive definite, or nearly so. In this mode, the algorithm attempts to select pivots on the diagonal.
  See an example in EXAMPLE/dlinsol1.c
• Better Fortran interface. See FORTRAN/ directory, and README in that directory.
  
  
• 06/14/05 :   fixed a bug in the complex drivers sgssvx/zgssvx when the input matrix is stored in compressed row format.
  
  
• 08/01/05 :
  • Prefixed the header files by "slu_".
  • Fixed a memory leak in get_perm_c() when bnz=0.
  • Changed "abs" to "fabs" in izmax1.
  • Upgraded COLAMD to the latest version (2.3).
  
  
• 01/02/06 :
  • Changed the argument of SUPERLU_MALLOC from "int" to "size_t".
    Otherwise the computation of the argument to SUPERLU_MALLOC may cause 32-bit integer overflow.
  • In TESTING/[cdsz]drive.c, moved the forward declaration of the prototype to the top of the file before main().
  • Used standard name for library archive: libsuperlu_3.0.a.

2. SuperLU 3.1 (released August 1, 2008)

• Remove recursive DFS for postordering elimination tree in sp_coletree.c
  (The nonrecursive routine nr_etdfs() was contributed by Cedric Doucet, CEDRAT Group, Meylan, France.)
• Make supermatrix.h the same for all three libraries
• Include an on-line HTML documentation for the source code
• Bug fixes:
  • corrected backward error BERR formula when a component of the RHS and the residual are exactly zero
  • change parameter "delta" to genmmd() from 1 to 0 in get_perm_c
  • remove "static" declaration in EXAMPLE/xlinsolx*.c

3. SuperLU 4.0 (released June 30, 2009)

• Include threshold-based incomplete factorization (ILU)
  
• Removed the static global variables so that it is thread-safe.

4. SuperLU 4.1 (released November 25, 2010)

• Make superlu_options_t{} structure and enum constants the same for both superlu & superlu_dist.
• Replace qsort by "quick select" (qselect) in ILU's secondary dropping.
• Replace mc64ad.f by mc64ad.c using f2c.
• Bug fixes, including:
  • ilu_sdrop_row.c.
  • xgsisx.c, so that when mc64 permutation is used in ILU, the right-hand side is permuted properly.
• Add parameter #7 in sp_ienv(), setting as the maxsuper for ILU code (smaller than parameter #3).
• Update Users Guide.
• Update doxygen code documentation.

5. SuperLU 4.2 (released August 25, 2011)

• Fix a bug in ILU driver routine dgsisx.c, so that on return, the initial row permutation is combined with perm_r[] from partial pivoting.
• Modify 2 ILU examples: EXAMPLE/ditersol.c, EXAMPLE/ditersol1.c
• Update superlu_timer.c

• 09/10/07 :
  • Included support for complex data types. (now has four types: single and double precision / real and complex.)
  • Included OpenMP, in addition to POSIX threads.
  • Removed an explicit recursion in a subroutine, which often causes stack overflow for large problems.
  • A number of bug fixes.
  
  
• 01/15/08 :
  • enable detailed profiling by compiling with -DPROFILE.
  • a number of bug fixes.

• 03/15/03 :   Included the distributed input interface
  • The driver routine for the distributed interface is pdgssvx()
  • The driver routine for the global interface is pdgssvx_ABglobal()
  
  
• 02/23/05 :   Improved the time of the redistribution routines.
  
  
• 08/01/05 :
  • In pdgsrfs_ABXglobal.c / pzgsrfs_ABXglobal.c, put the "static" function prototypes at file scope.
  • Fixed a memory leak in get_perm_c() when bnz=0.
  • Fixed a memory leak in superlu_grid.c: added a call MPI_Group_free( &superlu_grp ).
  • Removed COLAMD ordering option.
  
  
• 01/02/06:
  • Added prototypes to the BLAS routines, in superlu_ddefs.h/superlu_zdefs.h.
  • CBLAS/ directory: made a symbolic link Cnames.h -> ../SRC/Cnames.h
  • Fixed memory leaks related to MPI, in supelu_grid.c
    
    • added MPI_Group_free(&mpi_base_group);
    • added MPI_Type_free( &SuperLU_MPI_DOUBLE_COMPLEX );
  • Added "slamch" in Cnames.h.
  • Use standard name for library archive: libsuperlu_dist_2.0.a.
  • Restricted the length of Fortran names (in FORTRAN/ directory) not exceeding 31 characters.

2. SuperLU_DIST 2.1 (released November 1, 2007)

• 11/01/07 :
  • Included parallel symbolic factorization, which depends on the ParMeTiS parallel ordering code.
    To use this, you need to set one field in the "options" structure as:
    • options.ParSymbFact = YES;
    
    
  • Corrected backward error BERR formula when a component of the RHS and the residual are exactly zero.
  • Made "supermatrix.h" identical for serial SuperLU, SuperLU_MT, and SuperLU_DIST.
  • Fixed a memory leak of the equilibration factors R/C, when Equil and SamePattern_SameRowPerm are set at the same time.

3. SuperLU_DIST 2.2 (released February 20, 2008)

• 02/20/08 :
  • Fixed a number of memory leaks and other bugs related to parallel symbolic factorization.
    
  • Updated files in SRC/ directory:
    • superlu_defs.h
    • psymbfact.c
    • get_perm_c_parmetis.c
    • pdgssvx.c, pzgssvx.c
    • pdsymbfact_distdata.c, pzsymbfact_distdata.c

4. SuperLU_DIST 2.3 (October 15, 2008)

• Improved panel factorization: 20-25% faster overall.
• Improved triangular solve: 60-80% faster.
• Updated the Cnames.h with BLAS name mangling [UPCASE].
• Included an on-line HTML documentation for the source code.
• Fixed a few bugs.
• No change of calling sequences.
• Fixed a few bugs related to 64-bit long long int. (04/04/10)

5. SuperLU_DIST 2.4 (June 9, 2010)

• Updated several headers which are used by a new hybrid solver.
• No change of calling sequences.

6. SuperLU_DIST 2.5 (November 25, 2010)

• Make superlu_options_t{} structure and enum constants the same for both superlu & superlu_dist.
• Update several header files which are needed by a new hybrid solver PDSLin: superlu_defs.h, superlu_ddefs.h.
• Replace mc64ad.f by mc64ad.c using f2c.
• Update Fortran90 interface to handle 64-bit integers properly.
• Update Users Guide.
• Update doxygen code documentation.

7. SuperLU_DIST 3.0 (October 18, 2011)

• Use better task scheduling strategy for LU factorization, which resulted in 2-3x faster than V2.5, especially when using large number of processors.
• Fixed a bug with METIS(A'+A), when the input A is diagonal matrix.
• Add a few options in options_t {...} structure.
• Rename enum constants SINGLE, DOUBLE, EXTRA to SLU_SINGLE, SLU_DOUBLE, SLU_EXTRA, to avoid name clash in Windows.
• Update Users Guide.
• Update doxygen code documentation.

7. SuperLU_DIST 3.1 (May 20, 2012)

• Update (par)metis interface to be compatible with new 64-bit ParMetis 4.0.2.
• Fix a bug in the factorization routine when using 64-bit integer.