parallel statistics.

[Ravi]

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? 

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

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