GPU ROUNDING PROBLEM

Hi, I am consumer of GeForce 9400 GT. I am first user for CUDA programming. in may final task result of my mini-thesis have half result in this site below:

http://uboiz.webs.com/GPURounding.html

my problem is, what my work taht is true? what GPU rounding error was different every calculation although with same code and same parameter. thank for your help. I am sorry for my english… :rolleyes:

If you are getting different results on each run, you must have some kind of non-determinism in your CUDA code, perhaps multiple threads writing to the same location in memory?

I’am sorry I am not understand what you mind about ‘non-determinism’, can u give me an example? thank for your help