parallel statistics.

[Matthew Knepley]

On Fri, Sep 11, 2009 at 10:48 AM, Ravi <rxk at cfdrc.com> wrote:

>  Matt,
>
> I see your point: lots of interesting information is given by log_summary.
> However I need to report the total latency time and
> computation/communication for some simulations. How do I get those?
>

We have no way of getting that information. You can try the MPI profiling
tools (like JUMPSHOT).

  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:* Friday, September 11, 2009 10:12 AM
> *To:* PETSc users list
> *Cc:* pjd at cfdrc.com; Vincent Harrand
> *Subject:* Re: parallel statistics.
>
>
>
> 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
>



-- 
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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