I am trying to compare TDMS write performance between similar systems to determine if I stand a chance of being able to capture data from my cameras at anywhere near the speed needed (240fps at 640x480 is my basic target).
The two systems are:
Windows 7 laptop with LV2014, 16GB of memory, Core I7 2.5GHZ, 500GB ST500 hard drive (SCSI)
PXIe-8135 RT (PharLap 13.1), 4GB memory, Core I7 2.8GHz, 500GB hard drive (SCSI)
I have a VI which simulates storing video frame data to a TDMS file (Raw U8) (Attached). When this is run on the laptop, with all of the heavy applications like antivirus, on-access scanning, etc.. I get about twice the storage performance that I get when the same VI is run on the PXIe-8135. Given their similar hardware specifications, that has taken me by surprise and I fear that the entire system may be non-viable. I would have expected better performance from the PXIe-8135 in fact (Even with the lower total memory given that this test isn't even scratching the surface of the available memory).
So, I suspect I am missing something fundamental about how to get higher performance disk I/O out of LabView RT and would like to hear any suggestions that may be available. Or does labView RT simply have this poor of performance compared to a Windows 7 installation?
Thanks,
Robert