[nightly] IMPORTANT : vtk huge rendering performance drop ?

[Volpe, Christopher R (CRD)]

And the strange things is, my stats are MUCH worse than his, both before and after his noted
performance drop:

Best results, summary :
  - intel running Windows NT 4.0
  - Tcl/Tk 8.2.0
  - Win32OpenGL (visual is truecolor/truecolor/32)
  - window was 400 x 400
   1) 128x128 : 1066.9 kpolys/s : [stripper]
   2) 128x128 :  595.5 kpolys/s : [small_sphere]
   3) 128x128 :  595.5 kpolys/s : [transparency]
   4) 128x128 :  589.7 kpolys/s : []
   5) 128x128 :  543.3 kpolys/s : [texture, transparency]
   6) 128x128 :  538.5 kpolys/s : [texture]
   7) 128x128 :  439.1 kpolys/s : [wireframe]

Chris
________________________________________
Christopher R. Volpe
Computer Scientist
Computer Graphics & Systems Program
GE Corporate Research & Development
Bldg KW, Room C215
P.O. Box 8, Schenectady, NY 12301

e-mail: volpecr at crd.ge.com    
web: http://www.crd.ge.com/~volpecr
(518) 387-7766, Dial Comm: 8*833-7766, Fax: (518) 387-6981
e-mail: volpecr at crd.ge.com    web: http://www.crd.ge.com/~volpecr


|> -----Original Message-----
|> From: Sebastien Barre [mailto:barre at sic.sp2mi.univ-poitiers.fr]
|> Sent: Tuesday, November 02, 1999 9:49 AM
|> To: vtkusers at gsao.med.ge.com
|> Subject: [nightly] IMPORTANT : vtk huge rendering performance drop ?
|> 
|> 
|> Hi
|> 
|> Last week Christopher Volpe (CRD) send me strange benchmarks results
|> (http://www.hds.utc.fr/~barre/vtk/sphere-bench.html). 
|> Although he was using
|> the same graphics board as mine (maxVision Titan II aka 
|> 3Dlabs GMX2000) and
|> a Pentium II *faster* than mine (400 Mhz against 266 Mhz 
|> overclocked to 300
|> Mhz), his results were *much lower* ! I was puzzled. We 
|> noticed that I was
|> using VTK 2.4 official, and he was using VTK 2.4 nightly.
|> 
|> Now for some news : I have just built VTK 2.4 official AND nightly
|> (yesterday release) on my Visual SGI 320 (NT4), and the 
|> results are *very*
|> annoying :
|> 
|>   - Tcl/Tk 8.0.5
|>   - Win32OpenGL (visual is truecolor/truecolor/32)
|> 
|> VTK 2.4 official
|> 
|>    1) 256x256 : 3224.3 kpolys/s : [stripper]
|>    2) 256x256 : 1950.7 kpolys/s : [small_sphere]
|>    3) 256x256 : 1950.7 kpolys/s : []
|>    4) 256x256 : 1950.7 kpolys/s : [transparency]
|>    5) 256x256 : 1393.4 kpolys/s : [texture]
|>    6) 256x256 : 1388.4 kpolys/s : [texture, transparency]
|>    7) 256x256 :  888.7 kpolys/s : [wireframe]
|> 
|> VTK 2.4 nightly
|> 
|>    1) 256x256 : 2393.5 kpolys/s : [stripper]
|>    2) 256x256 : 1950.7 kpolys/s : [small_sphere]
|>    3) 256x256 : 1283.4 kpolys/s : []
|>    4) 256x256 : 1266.7 kpolys/s : [transparency]
|>    5) 256x256 : 1258.5 kpolys/s : [texture, transparency]
|>    6) 256x256 : 1250.5 kpolys/s : [texture]
|>    7) 256x256 :  665.8 kpolys/s : [wireframe]
|> 
|> Notice the huge performance drop for stripped geometry (3224 
|> kpolys -> 2393
|> kpolys ), as well as for all other (1950 kpolys -> 1200).
|> 
|> Christopher told me about Mutex stuff being added all over 
|> the place in the
|> source. Is it related ?
|> 
|> Losing such frame/s is a bit problematic. Did anyone notice 
|> the same ? I
|> have not been following the Quality Dashboard every day 
|> looking for Timing
|> Change, but I guess someone had ? 
|> 
|> I could kept using the official release, but I need Python 
|> support (thanks
|> to David Gobbi). 
|> 
|> Thanks
|> -- 
|> Sebastien BARRE
|> IRCOM-SIC, UMR-CNRS 6615 - Universite de Poitiers 
|> Bat. SP2MI, Bvd 3 - Teleport 2, BP 179 F-86960 Futuroscope Cedex 
|> Tel. : +33 (0)5 49 49 65 95 / 65 83, Fax : +33 (0)5 49 49 65 70 
|> http://www-sic.univ-poitiers.fr/ 
|> 
|> 
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|> 


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