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<div>Berk,</div>
<div>That’s really cool – thanks for testing and passing on the results.</div>
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<div>Alan</div>
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<span style="font-weight:bold">From: </span>ParaView <<a href="mailto:paraview-bounces@paraview.org">paraview-bounces@paraview.org</a>> on behalf of Berk Geveci <<a href="mailto:berk.geveci@kitware.com">berk.geveci@kitware.com</a>><br>
<span style="font-weight:bold">Date: </span>Tuesday, October 20, 2015 at 2:00 PM<br>
<span style="font-weight:bold">To: </span>David Trudgian <<a href="mailto:david.trudgian@utsouthwestern.edu">david.trudgian@utsouthwestern.edu</a>><br>
<span style="font-weight:bold">Cc: </span>"<a href="mailto:paraview@paraview.org">paraview@paraview.org</a>" <<a href="mailto:paraview@paraview.org">paraview@paraview.org</a>><br>
<span style="font-weight:bold">Subject: </span>[EXTERNAL] Re: [Paraview] Volume Rendering 17GB 8.5 billion cell volume<br>
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<div dir="ltr">Hi folks,
<div><br>
</div>
<div>I wanted to close the loop on this. Here are my findings:</div>
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<div>* ParaView master (4.4 should also do) + OpenGL2 + NVIDIA Tesla w 12 GB memory: I verified that I can volume render data up to the capacity of the card. I could volume render a 1400x1400x1400 volume of floats.</div>
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<div>* ParaView master (4.4 should also do) + OpenGL2 + Mesa (OSMesa 11, llvmpipe, swrast): Mesa has some fairly small limits on 3D texture size, which is what we use for volume rendering. So, ~ 1000x1000x1000 will be the upper end of what can be done for now.
In time, we will implement multiple textures / streaming to enable rendering of larger volumes.</div>
<div><br>
</div>
<div>Best,</div>
<div>-berk</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Sep 28, 2015 at 11:00 AM, David Trudgian <span dir="ltr">
<<a href="mailto:David.Trudgian@utsouthwestern.edu" target="_blank">David.Trudgian@utsouthwestern.edu</a>></span> wrote:<br>
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<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Berk,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Thanks very much for looking into this. Look forward to trying things out whenever they’re ready.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">DT<u></u><u></u></span></p>
<span class="">
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black">--</span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><br>
David Trudgian Ph.D.<br>
Computational Scientist, BioHPC<br>
UT Southwestern Medical Center<br>
Dallas, TX 75390-9039<br>
Tel: <a href="tel:%28214%29%20648-4833" value="+12146484833" target="_blank">(214) 648-4833</a></span><span style="font-size:11.0pt;font-family:Consolas;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><u></u> <u></u></span></p>
</span>
<p class="MsoNormal"><b><span style="font-size: 11pt; font-family: Calibri, sans-serif;">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> Berk Geveci [mailto:<a href="mailto:berk.geveci@kitware.com" target="_blank">berk.geveci@kitware.com</a>]
<br>
<b>Sent:</b> Monday, September 28, 2015 9:58 AM</span></p>
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<div class="h5"><br>
<b>To:</b> David Trudgian <<a href="mailto:David.Trudgian@UTSouthwestern.edu">David.Trudgian@UTSouthwestern.edu</a>><br>
<b>Cc:</b> ParaView Mailing List <<a href="mailto:paraview@paraview.org" target="_blank">paraview@paraview.org</a>><br>
<b>Subject:</b> Re: [Paraview] Volume Rendering 17GB 8.5 billion cell volume<u></u><u></u></div>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hi David,<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
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<div>
<p class="MsoNormal">I have been trying to find some cycles to check this out myself with ParaView 4.4. Thanks to hardware issues (i.e. my big workstation's disk dying), I haven't been able to. Good news is that I found issues with OSMesa + OpenGL2 that we
are working through. Give me another 1-1.5 weeks.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Best,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">-berk<u></u><u></u></p>
</div>
</div>
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<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">On Mon, Sep 28, 2015 at 10:46 AM, David Trudgian <<a href="mailto:David.Trudgian@utsouthwestern.edu" target="_blank">David.Trudgian@utsouthwestern.edu</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Hi Berk,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Finally managed to grab an allocation of some Tesla K40 nodes on our cluster, to check GPU rendering of the full 17GB file with 2 x 12GB GPUs. I see
the same thing as I did with OSMesa rendering.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The 9GB downsampled version works great, across 2 nodes both with a single K40. Go up to the 17GB original file and nothing is rendered, no errors.
Same behavior with OPENGL or OPENGL2 backends.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">This is all on paraview 4.3.1 still – I need to find time to build OSMesa / MPI versions of 4.4 here. But, does 4.4. have any fixes that would be
expected to affect this?</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Thanks,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;color:black">--</span><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><br>
David Trudgian Ph.D.<br>
Computational Scientist, BioHPC<br>
UT Southwestern Medical Center<br>
Dallas, TX 75390-9039<br>
Tel: <a href="tel:%28214%29%20648-4833" target="_blank">(214) 648-4833</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size: 11pt; font-family: Calibri, sans-serif;">From:</span></b><span style="font-size: 11pt; font-family: Calibri, sans-serif;"> Berk Geveci [mailto:<a href="mailto:berk.geveci@kitware.com" target="_blank">berk.geveci@kitware.com</a>]
<br>
<b>Sent:</b> Tuesday, September 15, 2015 2:43 PM<br>
<b>To:</b> David Trudgian <<a href="mailto:David.Trudgian@UTSouthwestern.edu" target="_blank">David.Trudgian@UTSouthwestern.edu</a>><br>
<b>Cc:</b> ParaView Mailing List <<a href="mailto:paraview@paraview.org" target="_blank">paraview@paraview.org</a>><br>
<b>Subject:</b> Re: [Paraview] Volume Rendering 17GB 8.5 billion cell volume</span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Hey David,<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">I am hoping to have some time to play around with volume rendering and hopefully tracking this issue, one thing that I wanted to clarify: it sounds from you description that you have a short (2 byte) value. Is that correct?<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Thanks,<u></u><u></u></p>
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<p class="MsoNormal">-berk<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">On Wed, Sep 9, 2015 at 5:00 PM, David Trudgian <<a href="mailto:david.trudgian@utsouthwestern.edu" target="_blank">david.trudgian@utsouthwestern.edu</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hi,<br>
<br>
We have been experimenting with using Paraview to display very volumes from very<br>
large TIFF stacks generated by whole-brain microscopy equipment. The test stack<br>
has dimensions of 5,368x10,695x150. Stack is assembled in ImageJ from individual<br>
TIFFs, exported as a RAW and loaded into paraview. Saved as a .vti for<br>
convenience. Can view slices fine in standalone paraview client on a 256GB machine.<br>
<br>
When we attempt volume rendering on this data across multiple nodes with MPI<br>
nothing appears in the client. Surface view works as expected. On switching to<br>
volume rendering the client's display will show nothing. There are no messages<br>
from the client or servers - no output.<br>
<br>
This is happening when running pvserver across GPU nodes with NVIDIA Tesla<br>
cards, or using CPU only with OSMESA. pvserver memory usage is well below what<br>
we have on the nodes - no memory warnings/errors.<br>
<br>
Data is about 17GB, 8 billion cells. If we downsize to ~4GB or ~9GB then we can<br>
get working volume rendering. The 17GB never works regardless of scaling<br>
nodes/mpi processes. The 4/9GB will work on 1 or 2 nodes.<br>
<br>
Am confused by the lack of rendering, as we don't have memory issues, or an<br>
other messages at all. Am wondering if there are any inherent limitation, or I'm<br>
missing something stupid.<br>
<br>
Thanks,<br>
<br>
Dave Trudgian<br>
<br>
<br>
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