labwindows errors with intel duo core

[l3]

I have just acquired a laptop with the new intel duo core in it. After installing and trying to run software I have developed in LabWindows on a non-duo core I am starting to see strange behavior. I seem to be having problems with TCP connections, I'm not sure if this is a problem with port numbers or not though. The other problem I am seeing appears to be related to strings and displaying them to the screen.

Has anyone else seen issues when migrating software developed on a non-duo core to a duo core?

Thanks

[sarahk]

Hi, I3.

I just did some searching, and I haven't found any references to issues with dual-core systems and any of the recent CVI versions. I did find an issue with CVI 2, but I bet you're not using that. 😃

Can you tell me a little about the problems you're having?

[markus kossmann]

Does your code use threads ? Then using the code on a dual core or SMP machine may show up bugs in locking between the threads because on such a machine two threads may run really in parallel, whereas on a single processor machine the threads are run sequentially.

[l3]

I'm not really sure if the probelm was really related to the duo core or not, but I installed a copy of LabWindows 8.0.1 and the problem no longer exists. The previous version of LabWindows I was using was 7.0.

[menchar]

We had issues with multicore processors and serial ports.  CVI 7.0.

Now we use NI 843x board with kernel mode serial driver advertised by NI to be "hyper thread compatible".  No problems with multi-threaded programs running on PC's with XP Pro and hyperthreading enabled.

There is a class of errors that can exist that you only see on a machine with true concurrency as opposed to pseudo-concurrency like you have with a single CPU core.  But a properly designed mult-threaded app won't have these 😉

Menchar