00001 /* ========================================================================== */ 00002 /* === umfpack_tictoc ======================================================= */ 00003 /* ========================================================================== */ 00004 00005 /* -------------------------------------------------------------------------- */ 00006 /* UMFPACK Version 4.3 (Jan. 16, 2004), Copyright (c) 2004 by Timothy A. */ 00007 /* Davis. All Rights Reserved. See ../README for License. */ 00008 /* email: davis@cise.ufl.edu CISE Department, Univ. of Florida. */ 00009 /* web: http://www.cise.ufl.edu/research/sparse/umfpack */ 00010 /* -------------------------------------------------------------------------- */ 00011 00012 void umfpack_tic (double stats [2]) ; 00013 00014 void umfpack_toc (double stats [2]) ; 00015 00016 00017 /* 00018 Syntax (for all versions: di, dl, zi, and zl): 00019 00020 #include "umfpack.h" 00021 double stats [2] ; 00022 umfpack_tic (stats) ; 00023 ... 00024 umfpack_toc (stats) ; 00025 00026 Purpose: 00027 00028 umfpack_tic returns the CPU time and wall clock time used by the process. 00029 The CPU time includes both "user" and "system" time (the latter is time 00030 spent by the system on behalf of the process, and is thus charged to the 00031 process). umfpack_toc returns the CPU time and wall clock time since the 00032 last call to umfpack_tic with the same stats array. 00033 00034 Typical usage: 00035 00036 umfpack_tic (stats) ; 00037 ... do some work ... 00038 umfpack_toc (stats) ; 00039 00040 then stats [1] contains the time in seconds used by the code between 00041 umfpack_tic and umfpack_toc, and stats [0] contains the wall clock time 00042 elapsed between the umfpack_tic and umfpack_toc. These two routines act 00043 just like tic and toc in MATLAB, except that the both process time and 00044 wall clock time are returned. 00045 00046 This routine normally uses the sysconf and times routines in the POSIX 00047 standard. If -DNPOSIX is defined at compile time, then the ANSI C clock 00048 routine is used instead, and only the CPU time is returned (stats [0] 00049 is set to zero). 00050 00051 umfpack_tic and umfpack_toc are the routines used internally in UMFPACK 00052 to time the symbolic analysis, numerical factorization, and the forward/ 00053 backward solve. 00054 00055 Arguments: 00056 00057 double stats [2]: 00058 00059 stats [0]: wall clock time, in seconds 00060 stats [1]: CPU time, in seconds 00061 */
1.4.6