[petsc-users] FLOPS vs FLOPS/sec from PETSc -log_summary

[Justin Chang]

"Flops" here simply stands for floating point operations, not floating
point operations per second.

On Wed, Feb 15, 2017 at 12:58 PM, Ajit Desai <aero.aju at gmail.com> wrote:

> Hello everyone,
>
> I am little unclear between Flops and Flops/sec in the performance profile
> obtained for my solver using *-log_summary*.
> Usually, FLOPS stands for (Floating Point Operations Per Second) then what
> is Flops/sec produced by PETSc log_summary and how it is different from
> Flops?
>
> I have included the output for the reference below.
>
>                                              Max          Max/Min
>  Avg            Total
> Time (sec):                     6.782e+02      1.00003   6.782e+02
> Objects:                          7.400e+01      1.02778   7.206e+01
> Flops:                              5.451e+11      1.99585   4.518e+11
>  3.181e+14
> Flops/sec:                       8.038e+08      1.99585   6.662e+08
>  4.690e+11
> MPI Messages:               0.000e+00      0.00000   0.000e+00  0.000e+00
> MPI Message Lengths:   0.000e+00      0.00000   0.000e+00  0.000e+00
> MPI Reductions:             1.000e+00      1.00000
>
> Thanks in advance.
> *Ajit Desai*
>  PhD Scholar, Carleton University, Canada
>
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