PXI Xnet slow

[ChaoZ]

Hi all,

I have a CAN Communication program which is to read and write CAN messages.

On my Thinkpad PC, the time delay between different CAN read functions is only 2ms. This is using NI-USB CAN.

But On PXIe-8840, the time delay between different CAN read functions is about 16ms. Is there anything wrong with the PXI system? The NI IO traces are in attachments. This is using NI PXI CAN.

PXI chasis and PXI CAN should be faster than my pc and USB CAN. Why is it so slow?

Any one knows why? 

Thanks,
Chao