Aggregate Variables A good way to calculate Aggregate Variables?

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello,

I have been trying to find a good method of calculating grid wide aggregate variables in cuda, but have run into some complications. Does anyone know of a good method to calculate such variables?

I was attempting to have each block of threads write their data to a global variable, and then combine those global variables. I have not been able to find a way to ensure that all threads are able to write their data to the variable. I expected things to slow down while threads waited to add their value, but instead many of the threads are just skipped.

Thanks!

>>>Chris
2

You might want to take a look at thrust’s reduction function ( [url=“http://thrust.googlecode.com/svn/trunk/doc/html/group__reductions.html#g268b8b31c9c3a2e6e4b3b6be1f5c202d”]http://thrust.googlecode.com/svn/trunk/doc...4b3b6be1f5c202d[/url] ), or check out the sdk reduction example if you want an example of how to implement it yourself.