[petsc-dev] examples/benchmarks for weak and strong scaling exercise

[Aron Ahmadia]

What is going on with those results?  In both cases the first parallel code
is seriously outperforming the single-core.  I'd be interested in seeing
the two log_summary outputs.

I can only assume that the PETSc developers have an (if (serial);
sleep(10);) buried somewhere in the src from their last Gordon Bell run :)

A


On Thu, Apr 11, 2013 at 6:33 PM, Chris Kees <cekees at gmail.com> wrote:

> Thanks a lot. I did a little example with the Bratu problem and posted it
> here:
>
> https://proteus.usace.army.mil/home/pub/17/
>
> I used boomeramg instead of geometric multigrid because I was getting
> an error with the options above:
>
> %mpiexec -np 4 ./ex5 -mx 129 -my 129 -Nx 2 -Ny 2 -pc_type mg -pc_mg_levels
> 2
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------
> [0]PETSC ERROR: Argument out of range!
> [0]PETSC ERROR: New nonzero at (66,1) caused a malloc!
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
>
> I like the ice paper and will try to get the contractor started on
> reproducing those results.
>
> -Chris
>
> On Wed, Apr 10, 2013 at 1:13 PM, Nystrom, William D <wdn at lanl.gov> wrote:
> > Sorry.  I overlooked that the URL was using git protocol.  My bad.
> >
> > Dave
> >
> > ________________________________________
> > From: Jed Brown [five9a2 at gmail.com] on behalf of Jed Brown [
> jedbrown at mcs.anl.gov]
> > Sent: Wednesday, April 10, 2013 12:10 PM
> > To: Nystrom, William D; For users of the development version of PETSc;
> Chris Kees
> > Subject: Re: [petsc-dev] examples/benchmarks for weak and strong scaling
> exercise
> >
> > "Nystrom, William D" <wdn at lanl.gov> writes:
> >
> >> Jed,
> >>
> >> I tried cloning your tme-ice git repo as follows and it failed:
> >>
> >> % git clone --recursive git://github.com/jedbrown/tme-ice.git tme_ice
> >> Cloning into 'tme_ice'...
> >> fatal: unable to connect to github.com:
> >> github.com[0: 204.232.175.90]: errno=Connection timed out
> >>
> >> I'm doing this from an xterm that allows me to clone petsc just fine.
> >
> > You're using https or ssh to clone PETSc, but the git:// to clone
> > tme-ice.  The LANL network is blocking that port, so just use the https
> > or ssh protocol.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20130411/59765d35/attachment.html>