Vista - x86 multicore app on x64?

I hope I didn't screw myself when I bought my new Dell workstation (Quad core, Zeon, x64 Vista Ultimate) last fall but I am running into a problem now. I run a small CNC machine shop and have two main computer applications - SolidWorks for CAD work and Surfcam for CAM work. Now SW has a x64 version that I have been very happy with but Surfcam is a 32bit app. My latest release of Surfcam is written for 32bit multicore platforms and I'm finding that it is not utilizing the multicores (ie poor performance). The highest CPU load it will show is 25% - which to me means it is only using 1 core (thoeretically). Do I need to downgrade to 32bit Vista? Or is there a way to fix this from my end. Surfware - surfcam's maker doesn't have any plans for a 64bit version anytime soon..

Thanks
JP

Hello JP, and welcome to Vista Forums.

You might see if you may be able to set the processor affinity for Surfcam to see if that may help.

Hope this helps,
Shawn

Hi JP,

Heres a screenshot from a multi-core Application Im developing, The multiple threads of mscorewks (or other names) are a good example of multithreading, Can you run Process Explorer from Microsoft and screenshot the Threads used by that application so I can see what its using?




It will help determine if the application is using threading and using each core properly

Steven

I tried Process Explorer this morning and here is a screen shot of what is going on with Surfcam when it is supposed to be multi coring. If I set the affinity to one core it will max it out (25% total load). If set to all four cores it will use all four with a total cpu load of 25%. With no real change in performace.

Thanks for the help
JP