[Paraview] slow rendering speed

[Biao She]

Thanks your help again, Ken.
You figure out my problem. I indeed connect to localhost:10.0. I am a newbie
of Linux and ssh, I don't know how to connect to localhost:0.0 instead of
10.0. After I ssh to the cluster, the DISPLAY automatically set to
localhost:10.0. I use "/usr/bin/env DISPLAY=localhost:0" command to set it
back. Then, when I try to connect to the paraview server, I get an error
like this "DISPLAY is not accessible on the server side".
I know that if I start pvserver from the cluster directly, the DISPLAY is
localhost:0, but the cluster doesn't have any keyboard and monitor.
How can I connect to localhost:0 remotely?
Thanks!

Aaron


On Wed, Sep 10, 2008 at 7:09 AM, Moreland, Kenneth <kmorel at sandia.gov>wrote:

> First, let me just say that you should not expect the parallel rendering of
> such a small data set to be faster than just rendering it locally.  The
> parallel rendering has a constant overhead involving the readback of
> pixels,
> the transfer of data, and the computation of compositing operations.
>
> That said, based on the error it looks like your DISPLAY environment is set
> wrong.  You should be connecting to localhost:0.0, not localhost:10.0.  You
> are probably forwarding all of your rendering commands back to the desktop
> you logged in from though ssh forwarding.  That, of course, will really
> slow
> things down because all the rendering commands are being shoved through the
> network and all are being processed on a single machine.
>
> Make sure that you are actually rendering to the local GPU.  See the
> ParaView Wiki for more advice.
>
>  http://www.paraview.org/Wiki/Setting_up_a_ParaView_Server
>
> -Ken
>
>
> On 9/9/08 4:24 PM, "Biao She" <shebiao at gmail.com> wrote:
>
> > Hi there.
> > I use the client/server mode of paraview to render a small data(about
> 4M), but
> > the speed is very slow.
> > Below is how I do it:
> > I first ssh to the cluster and start the pvserver by this command: mpirun
> -np
> > 4 ./pvserver. The cluster is SGI Altix 4000. The operating system on the
> > cluster is SUSe linux, 64 bits system.
> > Then, I launch the paraview client on my local windows computer. After
> the
> > client connected to the server, there are two types of errors:
> > 1. Xlib: extension "XFree86-DRI" missing on display "localhost:10.0"
> > 2. unaligned access to 0x600000000197a1bc, ip=0x2000000003568e0
> > Paraview works regardless of these errors, but the problem is that the
> > rendering speed is way too slow.
> > I am wondering what could cause the slow down? Maybe the paraview doesn't
> use
> > GPU on the clusters at all? How could I tell if the paraveiw use GPU or
> not?
> > Or the unaligned access slow down the speed? These errors keep on
> repeating
> > whenever I change the viewplane.
> > I have stalled by this problem for days, any idea would be highly
> appreciated.
> >
> > Thanks!
> >
> > Aaron
> >
> >
> >
>
>
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