dolfin team mailing list archive

[Johan Hake <427534@xxxxxxxxxxxxxxxxxx>]

On Wednesday June 1 2011 09:06:39 Anders Logg wrote:
> On Wed, Jun 01, 2011 at 03:52:43PM -0000, Johan Hake wrote:
> > I have long thought of creating a C++ wrapper of Viper. It should be
> > possible, with passing just NumPy arrays of coordinates, connectivities
> > and data, from DOLFIN to Viper. But I have never got my but around to
> > code it up. To put it clear, it is not one of my highest priorities...
> 
> I think a rewrite of Viper would be a better option...

To be helpfull in this case you need to rewrite Viper in C++, which is 
probably not what you want. 

What is the status of the "new" Viper? In San Diego they are also having 
problems using it due to some license problems, which I do not know what is...

So it looks like no one is really using the new Viper because of license 
problems... There have to be a solution to this. Simula bought shares in 
siliconmed which was used to pay Ola and Arve developing this, so time and 
money is invested, and it is in our interest to sort this out...

> > Have you tried letting Viper read parallel vtk files, or would it still
> > be a problem to call Viper using system?
> 
> Any call to Viper (even from just one process) fails.

Ok

> > Does xterm work on Mac, and Linux, but not on Windos? Maybe you can "fix"
> > it using xterm and then dissable parallel C++ plotting on Windows?
> 
> Xterm won't help here... :-) What I meant was that it's perfectly
> possible to do
> 
>   system("xterm")
> 
> in parallel (even when MPI is initialized). The problem is that will
> only fire up a bunch of Xterms, no plots... :-P

Ok, a small missunderstandment from my part there ;)

Johan

> --
> Anders
> 
> > Johan
> > 
> > On Wednesday June 1 2011 07:59:28 Anders Logg wrote:
> > > I tried to work around this bug but without luck. For some reason, the
> > > combination of MPI, VTK (Viper) and system() leads to errors like
> > > 
> > > routed:binomial: Connection to lifeline [[27229,0],0] lost
> > > 
> > > The error does not show up if the call to viper is replaced by a call
> > > to for example xterm.
> > > 
> > > The error does not show up if MPI::Init() is not called.
> > > 
> > > 
> > > ** Changed in: dolfin
> > > 
> > >        Status: Confirmed => Won't Fix

-- 
You received this bug notification because you are a member of DOLFIN
Team, which is subscribed to DOLFIN.
https://bugs.launchpad.net/bugs/427534

Title:
  Viper plotting does not work in parallel from C++

Status in DOLFIN:
  Won't Fix

Bug description:
  Plotting fails in parallel. To reproduce this bug, uncomment the call
  to not_working_in_parallel in plot.cpp and run the Poisson demo with

    mpirun -n 2 ./demo

  Exits with a message about a lost lifeline.