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OSADL Articles:
2023-11-12 12:00
Open Source License Obligations Checklists even better now![]() Import the checklists to other tools, create context diffs and merged lists
2022-07-11 12:00
Call for participation in phase #4 of Open Source OPC UA open62541 support project![]() Letter of Intent fulfills wish list from recent survey
2022-01-13 12:00
Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed![]() Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached
2021-02-09 12:00
Open Source OPC UA PubSub over TSN project phase #3 launched![]() Letter of Intent with call for participation is now available
2017-09-12 12:00
OSADL project to create Open Source license checklists![]() Facilitate Open Source software delivery |
OSADL QA Farm on Real-time of Mainline Linux
About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards
Real-time Ethernet (Powerlink) packet interval and jitter analysis
Wakeup latency of all systems - Real-time optimization - Peer-to-peer UDP duplex link - OPC UA PubSub over TSN - Powerlink - Ethercat - Network load - kvm - Sleep states
One of the Linux real-time test systems (rack #b, slot #5) runs a Powerlink master kernel module that is connected to a B&R X20BC0083 Powerlink I/O node and is continuously sending cyclic system data at an interval of 500 µs. The packet stream is monitored using a B&R X20ET8819 Powerlink network analyzer (a figure of the setup is available in the related section of the QA Farm "About" page). The plots below are generated from 5-minute minimum, mean and maximum values of the packet interval as determined by the network analyzer. Considering a cycle time of 500 µs, the interval data and the jitter of the below 30-h plots are each based on a total of 216,000,000 individual timed cycles. In addition, the maxima per week, per month and per year can be displayed separately, and irregular events, if any, are stored in a data base. Manufacturers may use such long-term data for certification and similar purposes.
Last update 3 minutes ago
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- Please note that the recorded values represent minimum, mean and maximum values of 5-min intervals. Thus, the data in the columns labeled "Min:", "Avg:" and "Max:" are only relevant for the variables min, mean and max, respectively.
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- Please note that the recorded value represents maxima of 5-min intervals. Thus, the data in the columns labeled "Min:" and "Avg:" should not be considered; the only relevant result is the maximum of consecutive 5-min maxima at the rightmost column labeled "Max:".