PXI-6515 Benchmarks with NI-DAQmx
Primary Software: LabVIEW Development Systems>>Professional Development System
Primary Software Version: 8.0
Primary Software Fixed Version: N/A
Secondary Software: N/A
Hardware: Digital I/O (DIO)>>Isolated>>PXI-6515
Problem: What are the benchmarks for the PXI-6515?
Solution: The data transfer rates of the NI 6515 are software timed, also called unstrobed or nonlatched, and do not require status and control signals so the transfer speed are completely software/computer dependent. These rates may vary due to programming language and code efficiency, CPU utilization, transfer methods, and so on.
Below are the results of benchmark testing for the PXI-6515 based on 10,000 updates. All tests were executed without software delays or data verification; generated values were toggled each iteration. The VIs used to obtain these results are attached below.
| Hardware Setup |
|
| Device Type |
Model |
Assembly Part Number |
| Test Setup 1 |
| PXI Chassis |
PXI-1000B |
184607B-01 |
| Digital I/O Device |
PXI-6515 |
190318A-01 |
| MXI-4 Kit, Copper Cabling |
PXI-PCI8330
MXI-8330
PCI-8330
MXI-4, 3m Copper Cable |
186773B-01
186943B-01
1324640-4 |
| Test Setup 2 |
| PXI Chassis |
PXI-1010 |
184826C-01 |
| Digital I/O Device |
PXI-6515 |
184607B-01 |
| Controller |
PXI-8176 |
187317E-612 |
| Computer Specifications |
|
Computer 1 |
Computer 2 |
| Operating System |
Window XP Professional
Service Pack 2 |
Window XP Professional
Service Pack 2 |
| Model |
DELL OptiPlex GX260 |
PXI-8176 |
| Processor Speed |
2.39 GHz |
1.26 GHz |
| RAM |
512 MB |
512 MB |
| Bus Chipset |
Intel 845G Chipset
533 MHz Front Side Bus |
Intel 815E chipset
133MHz
|
| HD Access Rate |
ATA 100
7200 RPM |
ATA 100
4200 RPM |
| LabVIEW Version |
8.5 Released |
8.5 Released |
| NI-DAQmx |
8.7 Released |
8.7 Released |
| Acquire 1 Channel |
| Measurement |
Results Computer 1 |
Results Computer 2 |
| Total Time Elapsed |
110.2 ms |
77.5 ms |
| Average Update Rate |
90771 Hz |
128939 Hz |
| Average Update Interval |
11.0 µs |
7.75 µs |
| Acquire 1 Port (8 Channels) |
| Measurement |
Results Setup 1 |
Results Setup 2 |
| Total Time Elapsed |
75.8 ms |
127.6 ms |
| Average Update Rate |
131868 Hz |
78329 Hz |
| Average Update Interval |
7.58 µs |
12.8 µs |
| Acquire All Channels (32 Channels) |
| Measurement |
Results Computer 1 |
Results Computer 2 |
| Total Time Elapsed |
198.0 ms |
293.9 ms |
| Average Update Rate |
50505 Hz |
34026 Hz |
| Average Update Interval |
19.8 µs |
29.4 µs |
| Update 1 Channel |
| Measurement |
Results Computer 1 |
Results Computer 2 |
| Total Time Elapsed |
109.2 ms |
112.8 ms |
| Average Update Rate |
91603 Hz |
88700 Hz |
| Average Update Interval |
10.9 µs |
11.3 µs |
| Update 1 Port (8 Channels) |
| Measurement |
Results Computer 1 |
Results Computer 2 |
| Total Time Elapsed |
105.5 ms |
106.9 ms |
| Average Update Rate |
94787 Hz |
93555 Hz |
| Average Update Interval |
10.6 µs |
10.7 µs |
| Update All Channels (32 Channels) |
| Measurement |
Results Computer 1 |
Results Computer 2 |
| Total Time Elapsed |
149.5 ms |
174.1 ms |
| Average Update Rate |
66889 Hz |
57434 Hz |
| Average Update Interval |
14.9 µs |
17.4 µs |
Related Links: Products and Services: PXI-6515Product Manuals: NI 651x User ManualDeveloper Zone Tutorial: Complete Industrial Digital I/O and Counter/Timer Tutorial
Attachments: 
Report Date: 11/21/2005
Last Updated: 02/20/2008
Document ID: 3RK8M5X6
