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hi,
Ash Holsenback <no### [at] spam com> wrote:
> On 9/18/20 7:22 AM, William F Pokorny wrote:
> > On 9/18/20 6:36 AM, William F Pokorny wrote:
> > ...
> >>
> >> I don't think we have a fat rabbit to chase here.
> >>
> >> Of course run time improvements with am3 would be welcome. I have on
> >> my list to do some profiling with parametrics. Might take a side look
> >> at am3 too while I've got those compiles about. I've got the color
> >> shift issue to replicate and run down someday too. Hmm, wonder if I
> >> can trigger it with your simpler test cast Ton.
> >>
> >
> > We can indeed! All one needs do is change:
> >
> > background { color srgb <0, 0, 0> }
> >
> > to:
> >
> > #declare Acajou = srgb <0.29804,0.18431,0.15294>;
> > background { color Acajou }
> >
> > and the cpu time jumps.
> >
> > 16.918 -> 3443.029 ---> 20251.28%
> >
> > Plus the results are to my eye not as good.
> >
> > Does uberpov has the same behavior:
> >
> > 16.172 -> 3512.926 ---> 21622.27%
> >
> > A fat rabbit.
> >
> > Bill P.
>
> tried changing my am3 test file like above ... cannot duplicate issue
fwiw, same here, also alpha.10064268. in fact the coloured bg version is
faster,
edited transcript:
Script started on Fri 18 Sep 2020 20:58:43 BST
jr@crow:1:tmp$ c### [at] ngtonpov
#version 3.8;
global_settings {
assumed_gamma 1
noise_generator 2
}
#ifndef (global.N)
#declare N = 0;
#end
#if (N)
background {color srgb <.29804,.18431,.15294>}
#else
background {color srgb 0}
#end
union {
#for (I, -25, 25, 1)
cylinder {
<-20, 0, 0>, <20, 0, I>, 0.01
}
#end
pigment {
color srgb<1, 1, 1>
}
}
light_source {
<25, 8, 0>, rgb<1, 1, 1>
}
camera {
location <25, 8, 0>
right <image_width / image_height, 0, 0>
look_at <12, 0, 0>
}
jr@crow:2:tmp$ pov38 ngton.pov +d +p +q9 +am3 +a0.1 +ac0.9 +r6
Persistence of Vision(tm) Ray Tracer Version 3.8.0-alpha.10064268.unofficial
(g++ 4.8.2 @ x86_64-slackware-linux-gnu)
...
Support libraries used by POV-Ray:
ZLib 1.2.8, Copyright 1995-2012 Jean-loup Gailly and Mark Adler
LibPNG 1.4.20, Copyright 1998-2012 Glenn Randers-Pehrson
LibJPEG 8, Copyright 1991-2016 Thomas G. Lane, Guido Vollbeding
LibTIFF 3.9.7, Copyright 1988-1997 Sam Leffler, 1991-1997 SGI
Boost 1.54, http://www.boost.org/
OpenEXR 1.7.1 and IlmBase 1.0.3, Copyright (c) 2002-2011 Industrial Light &
Magic.
Dynamic optimizations:
CPU detected: Intel,SSE2,AVX
Noise generator: avx-intel (hand-optimized by Intel)
Parser Options
Input file: ngton.pov
Remove bounds........On
Split unions.........Off
Library paths:
/home/jr/.local/povray/include
/usr/local/share/povray-3.8/extra
/usr/local/share/povray-3.8/include
/usr/share/fonts/local
Clock value: 0.000 (Animation off)
Image Output Options
Image resolution.....960 by 720 (rows 1 to 720, columns 1 to 960).
Output file..........ngton.png, 24 bpp PNG
Dithering............Off
Graphic display......On (gamma: sRGB transfer function)
Mosaic preview.......Off
Continued trace......Off
Information Output Options
All Streams to console..........On
Debug Stream to console.........On
Fatal Stream to console.........On
Render Stream to console........On
Statistics Stream to console....On
Warning Stream to console.......On
==== [Parsing...] ==========================================================
----------------------------------------------------------------------------
Parser Statistics
----------------------------------------------------------------------------
Finite Objects: 51
Infinite Objects: 0
Light Sources: 1
Total: 52
----------------------------------------------------------------------------
Parser Time
Parse Time: 0 hours 0 minutes 0 seconds (0.001 seconds)
using 1 thread(s) with 0.000 CPU-seconds total
Bounding Time: 0 hours 0 minutes 0 seconds (0.000 seconds)
using 1 thread(s) with 0.000 CPU-seconds total
----------------------------------------------------------------------------
Render Options
Quality: 9
Bounding boxes.......On Bounding threshold: 3
Antialiasing.........On (Method 3, Threshold 0.100, Depth 6, Jitter 1.00,
Gamma 2.50)
==== [Rendering... Press p to pause, q to quit] ============================
----------------------------------------------------------------------------
Render Statistics
Image Resolution 960 x 720
----------------------------------------------------------------------------
Pixels: 691200 Samples: 0 Smpls/Pxl: 0.00
Rays: 5249224 Saved: 0 Max Level: 1/5
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Cone/Cylinder 123247827 1250084 1.01
Bounding Box 187640060 147701275 78.72
----------------------------------------------------------------------------
Shadow Ray Tests: 1226634 Succeeded: 0
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Render Time:
Photon Time: No photons
Radiosity Time: No radiosity
Trace Time: 0 hours 0 minutes 11 seconds (11.444 seconds)
using 2 thread(s) with 22.876 CPU-seconds total
==== [Paused... Press p to resume] =========================================
Press p, q, enter or click the display to continue...
POV-Ray finished
jr@crow:3:tmp$ pov38 ngton.pov +d +p +q9 +am3 +a0.1 +ac0.9 +r6 declare=N=1
Persistence of Vision(tm) Ray Tracer Version 3.8.0-alpha.10064268.unofficial
(g++ 4.8.2 @ x86_64-slackware-linux-gnu)
...
----------------------------------------------------------------------------
Render Statistics
Image Resolution 960 x 720
----------------------------------------------------------------------------
Pixels: 691200 Samples: 0 Smpls/Pxl: 0.00
Rays: 2283041 Saved: 0 Max Level: 1/5
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Cone/Cylinder 51037867 472363 0.93
Bounding Box 77941671 61111153 78.41
----------------------------------------------------------------------------
Shadow Ray Tests: 463586 Succeeded: 0
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Render Time:
Photon Time: No photons
Radiosity Time: No radiosity
Trace Time: 0 hours 0 minutes 5 seconds (5.006 seconds)
using 2 thread(s) with 9.995 CPU-seconds total
==== [Paused... Press p to resume] =========================================
Press p, q, enter or click the display to continue...
POV-Ray finished
'pov38' is a BASH alias for 'nice -n 19 povray'.
regards, jr.
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