[Paraview] slow rendering speed

[Moreland, Kenneth]

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
>
>
>