Inspired by an article compared performance between Away3D vs. Papervision3D, I’ve just wanted to compare simple performance Sandy 3D (3.1 AS3) vs. Papervision 3D (2.0. Revision 849. Code name: Greate White) in rendering 1,000 objects.
As a result, the papervision3D is faster than Sandy3D by roughly 2~3 times or even more. My benchmark implementations of both Sandy and Papervision3D and source codes are available.
Optimization advice of Sandy can be found here.
I’ve found a very good introduction about how to parallelize applications from http://www.cs.princeton.edu/courses/archive/spr08/cos598A/parallelization_course.pdf
Especially, a few tools are very helpful to analyze the code at the beginning stage:
1. gprof – profiler. Help to decide which part should look at. Consider to use a pthread wrapper available at http://sam.zoy.org/writings/programming/gprof.html
2. helgrind – To detect race conditions
In order to try OpenMP3.0, I had been trying to install gcc-4.3.2 on an x86_64 Linux box without any luck. I got the following error in building gcc-4.3.2
/usr/bin/ld: crti.o: No such file: No such file or directory
It turns out that I need 32bit libc for cross-compilation which I can’t install since I’m not a superuser. The workaround is to disable this feature by using “--disable-multilib” option as follow:
./configure –-disable-multilib
make
After installation, if you meet the following error in compiling OpenMP file:
gcc: libgomp.spec: No such file or directory,
find libgomp.spec under /path/to/gcc/lib64 and make a symbolic link under /path/to/gcc/lib/gcc/x86_64-unknown-linux-gnu/4.3.2 (See [2])
Reference:
[1] gcc-help mailing list
[2] OpenMP in 30 Minutes
