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Hi thanks for the first tests. :)<br>
<br>
Well we have to keep in mind that Blender 2.63 and current Trunk
differ a lot in terms of Cycles code (the new BVH code can be
responsible for errors too). <br>
I think I will compile trunk with 4.0 toolkit and 4.2 toolkit to do
a better comparison and upload. <br>
<br>
Best regards,<br>
Thomas<br>
<br>
Am 30.04.2012 20:39, schrieb David Black:
<blockquote cite="mid:4F9EDC6F.6070604@yahoo.co.uk" type="cite">
<meta content="text/html; charset=ISO-8859-1"
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<font face="Calibri"><b>Test 2: (just the GTX 460)</b><br>
Island_Cycles_BMesh_Second Updated<br>
19 Billions of Polygons, not a ridiculous number anymore -
Island<br>
<br>
</font><font face="Calibri"><b>Official Blender 263</b></font><br>
<font face="Calibri">1:00<br>
<br>
</font><font face="Calibri"><b>Blender 263.1 CUDA 4.2.9 test
version</b></font><br>
<font face="Calibri">2:50<br>
<br>
Very slow with new CUDA Toolkit plus same graphical glitches as
before with certain trees. Is it possible CUDA Toolkit 4.2.9 is
not backwards compatible, designed just for GTX 680 cards and
above? Guess we now need someone with a GTX 680 to test your
build, been wondering about getting one due to lower temps and
power usage, but still on the fence until know rendering works
correctly.<br>
<br>
David<br>
</font>
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<p style="font-size:small;"><a moz-do-not-send="true"
href="http://www.3d-designs-davidblack.blogspot.com">3d-designs-davidblack.blogspot.com</a></p>
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<br>
On 30/04/2012 18:32, David Black wrote:
<blockquote cite="mid:4F9ECCBB.2080101@yahoo.co.uk" type="cite">
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<font face="Calibri">Hey Thomas,<br>
<br>
Thank you for the download link. Here are my findings so
far...<br>
Mike Pan BMW test scene: Tried several times, re-rendering
same scene plus closing and opening Blender to being
rendering, no crashes on either GTX 460 or GTX 580M, render
begins almost instantly thanks to Brecht's amazing optimized
BVH building.<br>
<br>
Render times for CUDA Toolkit 4.2.9:<br>
<br>
<b>GTX 460<br>
1:03</b><br>
<br>
<b>GTX 580M<br>
1:09</b><br>
<br>
Can render almost a second faster if use the GTX 580M to run
Blender interface but then interface becomes too sluggish
during long GPU rendering, regrettably <i>(as you previously
mentioned)</i> using integrated Intel graphics to run
Blender interface means no Viewport GPU rendering. Why does
Viewport GPU rendering work using a 9600 GT for display and a
GTX 460 just for compute, it definitely uses the GTX 460 just
for calculations?<br>
<br>
Anyway I digress!<br>
<br>
Only problem with 4.2.9 toolkit, there are errors rendering
certain materials, render results are identical for both GTX
460 and GTX 580M . Below are compare images to highlight the
problem areas.<br>
<b><br>
Official Blender 263</b><br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.pasteall.org/pic/31044">http://www.pasteall.org/pic/31044</a><br>
<br>
<b>Blender 263.1 CUDA 4.2.9 test version</b><br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.pasteall.org/pic/31045">http://www.pasteall.org/pic/31045</a><br>
<br>
Hope this is helpful,<br>
<br>
David<br>
</font>
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<br>
On 30/04/2012 12:40, Thomas Dinges wrote:
<blockquote cite="mid:4F9E7A13.6060903@dingto.org" type="cite">
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Hi David,<br>
thanks for offering help. :)<br>
<br>
Here is a current version of Trunk for win64, compiled with
the Toolkit 4.2 and kernels 13, 20, 21 and 30.<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://blender.dingto.org/builds/trunk_win64_46104.7z">http://blender.dingto.org/builds/trunk_win64_46104.7z</a><br>
<br>
Best regards,<br>
Thomas<br>
<br>
Am 29.04.2012 22:31, schrieb David Black:
<blockquote cite="mid:4F9DA53E.9080200@yahoo.co.uk"
type="cite">
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http-equiv="Content-Type">
<font face="Calibri">Hi Thomas,<br>
<br>
Do you have a download link for your compiled version with
4.2.9? If helpful, can test it for you with both a 1GB
GTX 460 and 2GB GTX 580m then let you know the results, if
it crashes/freezes or not.<br>
<br>
Hope you're having a great weekend!<br>
<br>
David<br>
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<br>
On 29/04/2012 17:29, Thomas Dinges wrote:
<blockquote cite="mid:4F9D6C7A.7060802@dingto.org"
type="cite">
<pre wrap="">Hi everyone,
I did some extensive testing today with the new (stable release 4.2.9)
CUDA Toolkit with Blender 2.63 (45996) and current Trunk.
The results are fine (at least on my GT540 card), could not test other
cards yet.
Render time was the same, or in some cases a few seconds better.
However I experienced 1 serious issue with the Mike Pan BMW Test scene.
2.63 compiled with Toolkit 4.2 did not want to render, it frooze at the
"Packing BVH Triangles". I was unable to kill the Blender process, I had
to force shut down my computer. This happened 2 times (I did not want to
test it further).
I think that this might be a bug in Cycles, because the same scene works
fine in current Trunk (with the improved BVH code).
So I would suggest to stick with Toolkit 4.0 for a possible Blender
2.63a, but switch to Toolkit 4.2 in SVN and for 2.64. I could not find
an issue with it and current Trunk.
Best regards,
Thomas
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