parallel statistics.

[Matthew Knepley]

On Fri, Sep 11, 2009 at 10:09 AM, Ravi <rxk at cfdrc.com> wrote:

>  Hi Matt,
>
> log_summary does give information like time for barrier, zero size
> MPI_send. However interesting statistics like total latency time,
> computation/communication time ratio etc. This is needed by me to study the
> effect of partitions and BCs.
>

It gives these numbers for individual functions, like VecDot(), which is
what is important for solvers. Maybe you can
get generic things from JUMPSHOT, but the interpretation would be
problematic. What routine you you fix if total
latency was high?

  Matt


> Thanks
>
> Ravi
>
>
>
> *From:* petsc-users-bounces at mcs.anl.gov [mailto:
> petsc-users-bounces at mcs.anl.gov] *On Behalf Of *Matthew Knepley
> *Sent:* Thursday, September 10, 2009 2:06 PM
> *To:* PETSc users list
> *Subject:* Re: parallel statistics.
>
>
>
> On Thu, Sep 10, 2009 at 1:22 PM, Ravi <rxk at cfdrc.com> wrote:
>
>  Hi all,
>
>                 This is Ravi Kannan from CFD Research Corporation. Are
> there readily available or installable commands or chunks of code to get the
> parallel statistics including important ones like time spent in waiting and
> latency, communication time, available memory spent in each machine etc.
> when solving AX=B type problem
>
>
> In -log_summary.
>
>   Matt
>
>
>
>
> Thanks in advance
>
> Ravi
>
>
>
> Ravi Kannan, PhD
>
> Research Engineer
>
> CFD Research Corporation
>
> 215 Wynn Drive, Suite 501
>
> Huntsville, AL  35805
>
> (256)726-4851
>
> rxk at cfdrc.com
>
>
>
>
>
>
> --
> 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
>



-- 
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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