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- MMMMPPPPIIII____WWWWTTTTIIIIMMMMEEEE((((3333)))) MMMMPPPPIIII____WWWWTTTTIIIIMMMMEEEE((((3333))))
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- NNNNAAAAMMMMEEEE
- MMMMPPPPIIII____WWWWttttiiiimmmmeeee - Returns an elapsed time on the calling processor
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- C:
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- #include <mpi.h>
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- double MPI_Wtime()
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- C++:
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- #include <mpi.h>
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- double Wtime()
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- Fortran:
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- INCLUDE "mpif.h" (or USE MPI)
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- DOUBLE PRECISION TIME
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- TIME=MPI_WTIME()
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- SSSSTTTTAAAANNNNDDDDAAAARRRRDDDDSSSS
- This release implements the MPI 1.2 standard, as documented by the MPI
- Forum in the spring 1997 release of _M_P_I: _A _M_e_s_s_a_g_e _P_a_s_s_i_n_g _I_n_t_e_r_f_a_c_e
- _S_t_a_n_d_a_r_d.
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- The MMMMPPPPIIII____WWWWttttiiiimmmmeeee routine returns the elapsed wall-clock time in seconds
- since some time in the past on the calling processor. This routine is
- intended to be a high-resolution, elapsed (or wall) clock. See
- MMMMPPPPIIII____WWWWttttiiiicccckkkk(3) to determine the resolution of MMMMPPPPIIII____WWWWttttiiiimmmmeeee.
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- RRRREEEETTTTUUUURRRRNNNN VVVVAAAALLLLUUUUEEEESSSS
- Floating-point elapsed time in seconds. Note that calls made at the
- same time to MPI_Wtime() on different nodes running the same program may
- yield different values. The time returned is not necessarily the elapsed
- wall-clock run-time of the calling process.
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- If a program is checkpointed and restarted, values returned by
- MMMMPPPPIIII____WWWWttttiiiimmmmeeee(3) following the restart may be smaller than those returned
- before the checkpoint.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- MMMMPPPPIIII____WWWWttttiiiicccckkkk(3)
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- PPPPaaaaggggeeee 1111
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- MMMMPPPPIIII____WWWWTTTTIIIIMMMMEEEE((((3333)))) MMMMPPPPIIII____WWWWTTTTIIIIMMMMEEEE((((3333))))
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- MMMMPPPPIIII____AAAATTTTTTTTRRRR____GGGGEEEETTTT(3) for the discussion of MPI_WTIME_IS_GLOBAL.
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- PPPPaaaaggggeeee 2222
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