[petsc-users] Question about LogSummary

[Matthew Knepley]

On Sun, Mar 24, 2013 at 12:24 PM, Blaise A Bourdin <bourdin at lsu.edu> wrote:

> Hi,
>
> I am trying to do some scaling tests but can't figure out something about
> LogSummary: When no custom stages / events are defined, how come "Main
> Stage" is not 100% of the time? What is not counted? Here is a example of
> what I get:
>

Library loading?

   Matt


> Summary of Stages:   ----- Time ------  ----- Flops -----  --- Messages
> ---  -- Message Lengths --  -- Reductions --
>                         Avg     %Total     Avg     %Total   counts
> %Total     Avg         %Total   counts   %Total
>  0:      Main Stage: 2.5763e+03  65.1%  3.2380e+15 100.0%  1.230e+11
> 100.0%  8.493e+02      100.0%  7.013e+06  97.0%
>
> Where is the missing 35% of the time? I call PetscLogBegin right after
> PetscInitialize.
>
> Blaise
>
>
> --
> Department of Mathematics and Center for Computation & Technology
> Louisiana State University, Baton Rouge, LA 70803, USA
> Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276
> http://www.math.lsu.edu/~bourdin
>
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-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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