Persistence of Vision Raytracer 是一款高质量、完全免费的工具，用于创建令人惊叹的三维图形。
光线追踪是一种渲染技术，它通过模拟光线在现实世界中的传播方式来计算场景的图像。 然而，它的工作方式是反向的。 在现实世界中，光线从光源发出并照亮物体。 光线从物体反射或穿过透明物体。 这种反射的光线会到达我们的眼睛，或者可能是相机镜头。 因为绝大多数光线永远不会到达观察者，所以追踪一个场景将花费非常长的时间。
这类应用程序可以很容易地通过使用 pvmpovray 实现并行化。 Pvmpovray 期望在 Beowulf 风格的集群上工作，并使用 pvm 将负载分散到其他节点。 openMosix 的方法是相同的，但是我们只需在一台机器上执行此操作，并让 openMosix 为您完成负载分散工作！
关于 PVM Povray 的优秀 Howto 将向您展示如何设置 PVMPovray。 以下是一个简短的摘要。
$ cd pvmpov3_1g_2 $ tar xfz ../povuni_s.tgz $ tar xfz ../povuni_d.tgz $ ./inst-pvm Trying to apply the patch. Searching for rejected files $ |
如果您在 RH 8.0 系统上，我已经将 libpng 和 zlib 移动到 .notused 目录。 这是为了防止与其他 libpng 和 zlib 版本出现版本问题。
export PATH=$PATH:/usr/share/pvm3/lib export PVMROOt=/usr/share/pvm3 |
对于新手 pvm 用户来说，最后一个需要注意的是 pvm 确实使用它自己的路径，您必须将 pvmpov 放在该路径中，或者使用完整路径名启动它。
[root@dhcp71 povray31]# /usr/local/bin/pvmpov -L
/usr/src/povray/pvmpov3_1g_2/povray31/include/ +Iskyvase.pov
+Oskyvase.tga +NT16 +NW64 +NH64 +v +w1024 +h768
Persistence of Vision(tm) Ray Tracer Version 3.1g.Linux.gcc
This is an unofficial version compiled by:
Jakob Flierl - PVMPOV Version 3.1g.2
The POV-Ray Team(tm) is not responsible for supporting this version.
Copyright 1999 POV-Ray Team(tm)
Never found section in file
/usr/src/povray/pvmpov3_1g_2/povray31/include/.
Initializing PVMPOV
Spawning /usr/local/bin/pvmpov with 16 PVM tasks on 1 hosts...
...16 PVM tasks successfully spawned.
Waiting up to 120s for first slave to start...
Slave 0 successfully started.
Parsing Options
Input file: skyvase.pov (compatible to version 3.1)
Remove bounds........On Split unions........Off
Library paths: /usr/local/lib/povray31 /usr/local/lib/povray31/include
Output Options
Image resolution 1024 by 768 (rows 1 to 768, columns 1 to 1024).
Output file: skyvase.tga, 24 bpp PNG
Graphic display.....Off
Mosaic preview......Off
CPU usage histogram.Off
Continued trace.....Off Allow interruption...On Pause when
done.....Off
Verbose messages.....On
Tracing Options
Quality: 9
Bounding boxes.......On Bounding threshold: 25
Light Buffer.........On Vista Buffer.........On
Antialiasing........Off
Radiosity...........Off
Animation Options
Clock value.... 0.000 (Animation off)
PVM Options
Block Width.... 64 Block Height... 64
PVM Tasks...... 16
PVM Nice....... 5
PVM Arch.......
PVM Slave...... /usr/local/bin/pvmpov
PVM WorkingDir. /usr/src/povray/pvmpov3_1g_2/povray31
Redirecting 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
Starting frame 0...
Slave 1 at dhcp71.office.be.stone-it.com successfully started.
Slave 2 at dhcp71.office.be.stone-it.com successfully started.
Slave 3 at dhcp71.office.be.stone-it.com successfully started.
Slave 4 at dhcp71.office.be.stone-it.com successfully started.
Slave 5 at dhcp71.office.be.stone-it.com successfully started.
Slave 6 at dhcp71.office.be.stone-it.com successfully started.
Slave 7 at dhcp71.office.be.stone-it.com successfully started.
Slave 8 at dhcp71.office.be.stone-it.com successfully started.
Slave 9 at dhcp71.office.be.stone-it.com successfully started.
Slave 10 at dhcp71.office.be.stone-it.com successfully started.
Slave 11 at dhcp71.office.be.stone-it.com successfully started.
Slave 12 at dhcp71.office.be.stone-it.com successfully started.
Slave 13 at dhcp71.office.be.stone-it.com successfully started.
Slave 14 at dhcp71.office.be.stone-it.com successfully started.
Slave 15 at dhcp71.office.be.stone-it.com successfully started.
0:00:53 86.46 of blocks complete.Not using dhcp71.office.be.stone-it.com
for reassignment (77%)
0:00:53 86.98 of blocks complete.Not using dhcp71.office.be.stone-it.com
for reassignment (67%)
Not using dhcp71.office.be.stone-it.com for reassignment (86%)
Not using dhcp71.office.be.stone-it.com for reassignment (85%)
0:00:55 89.06 of blocks complete. 640 of 768 lines finished (in frame
0).Not using dhcp71.office.be.stone-it.com for reassignment (65%)
0:00:56 91.67 of blocks complete.Not using dhcp71.office.be.stone-it.com
for reassignment (72%)
0:00:56 92.71 of blocks complete.Not using dhcp71.office.be.stone-it.com
for reassignment (80%)
0:00:57 93.75 of blocks complete.
Slave at dhcp71.office.be.stone-it.com has exited.
0:00:57 94.79 of blocks complete.
Slave at dhcp71.office.be.stone-it.com has exited.
Slave at dhcp71.office.be.stone-it.com has exited.
0:00:58 95.83 of blocks complete.
Slave at dhcp71.office.be.stone-it.com has exited.
0:00:58 96.35 of blocks complete. 672 of 768 lines finished (in frame
0).Not using dhcp71.office.be.stone-it.com for reassignment (77%)
Slave at dhcp71.office.be.stone-it.com has exited.
0:00:58 97.14 of blocks complete. 688 of 768 lines finished (in frame
0).
Slave at dhcp71.office.be.stone-it.com has exited.
0:00:59 97.92 of blocks complete.
Slave at dhcp71.office.be.stone-it.com has exited.
0:00:60 98.44 of blocks complete. 704 of 768 lines finished (in frame
0).
Slave at dhcp71.office.be.stone-it.com has exited.
0:01:03 100.00 of blocks complete. 768 of 768 lines finished (in
frame 0).
Finishing frame 0...rtw. 768
Waiting for remaining slave stats.
PVM Task Distribution Statistics:
host name [ done ] [ late ] host name [ done ] [
late ]
dhcp71.office.be.stone-it.com [ 5.21%] [
0.00%]dhcp71.office.be.stone-it.com [ 7.81%] [ 0.07%]
dhcp71.office.be.stone-it.com [ 8.85%] [
1.17%]dhcp71.office.be.stone-it.com [ 4.69%] [ 0.00%]
dhcp71.office.be.stone-it.com [ 8.85%] [
0.98%]dhcp71.office.be.stone-it.com [ 4.17%] [ 0.00%]
dhcp71.office.be.stone-it.com [ 5.21%] [
0.00%]dhcp71.office.be.stone-it.com [ 8.33%] [ 0.52%]
dhcp71.office.be.stone-it.com [ 5.21%] [
0.00%]dhcp71.office.be.stone-it.com [ 5.73%] [ 0.72%]
dhcp71.office.be.stone-it.com [ 7.29%] [
2.73%]dhcp71.office.be.stone-it.com [ 4.17%] [ 0.00%]
dhcp71.office.be.stone-it.com [ 5.21%] [
0.00%]dhcp71.office.be.stone-it.com [ 6.77%] [ 0.13%]
dhcp71.office.be.stone-it.com [ 4.69%] [
0.00%]dhcp71.office.be.stone-it.com [ 7.81%] [ 0.00%]
POV-Ray statistics for finished frames:
skyvase.pov Statistics (Partial Image Rendered), Resolution 1024 x 768
----------------------------------------------------------------------------
Pixels: 303104 Samples: 303104 Smpls/Pxl: 1.00
Rays: 1192710 Saved: 0 Max Level: 0/5
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Cone/Cylinder 1842227 900504 48.88
CSG Intersection 2742731 323346 11.79
CSG Union 1801008 521692 28.97
Plane 20223278 11233348 55.55
Quadric 1801008 1196533 66.44
Sphere 1801008 461786 25.64
Bounding Object 1842227 900504 48.88
----------------------------------------------------------------------------
Calls to Noise: 1201944 Calls to DNoise: 2108954
----------------------------------------------------------------------------
Shadow Ray Tests: 2856188 Succeeded: 85620
Reflected Rays: 889606
----------------------------------------------------------------------------
Smallest Alloc: 9 bytes Largest: 20508
Peak memory used: 5643343 bytes
----------------------------------------------------------------------------
Time For Trace: 0 hours 1 minutes 7.0 seconds (67 seconds)
Total Time: 0 hours 1 minutes 7.0 seconds (67 seconds) |
我获得了 2 到 3 倍于我可用 CPU 数量的良好结果