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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20090911/46f67af2/attachment.htm>
