@@ -23,7 +23,7 @@ Measures measuring the same propriety are grouped together in tables and graphs,
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@@ -23,7 +23,7 @@ Measures measuring the same propriety are grouped together in tables and graphs,
Uses cyclictest from the rt-tests test suite to measure wake-up latency. A real-time thread is run on CPU1, and wakes up at a regular interval (specified by the interval parameter) using clock_nanosleep. It then uses clock_gettime and computes the difference between the scheduled wake-up time and the effective wake-up time measured by clock_gettime. The command used is: cyclictest -p `prio` -a1 -t1 -n -h 200 -q -i `interval`
Uses cyclictest from the rt-tests test suite to measure wake-up latency. A real-time thread is run on CPU1, and wakes up at a regular interval (specified by the interval parameter) using clock_nanosleep. It then uses clock_gettime and computes the difference between the scheduled wake-up time and the effective wake-up time measured by clock_gettime. The command used is: cyclictest -p `prio` -a1 -t1 -n -h 200 -q -i `interval`
An UDP packet is periodically sent from one board to another and sent back as soon as it arrives using a real time thread. The round trip time is computed with clock_gettime on the transmitting board.
An UDP packet is periodically sent from one board to another and sent back as soon as it arrives using a real time thread. The round trip time is computed with clock_gettime on the transmitting board.
**Common test metadata:** Linux kernel version: 4.19-debian, Boot Parameters: isolcpus, Interval: 10000us, ETF qdisc delta: 200us, Task priority: 99, Device and processor load: ssh, Test duration: 0h4, qdisc: pfifo_fast, etf_offset: none, route: switch
**Common test metadata:** Linux kernel version: 4.19-debian, Boot Parameters: isolcpus, Interval: 10000us, ETF qdisc delta: 200us, Task priority: 99, Device and processor load: ssh, Test duration: 0h4, qdisc: pfifo_fast, etf_offset: none, route: switch, Ethernet speed in Mb/s: 100
Minimum | Maximum | Average | Standard deviation | Lost packets
Minimum | Maximum | Average | Standard deviation | Lost packets
@@ -60,15 +60,20 @@ Minimum | Maximum | Average | Standard deviation | Lost packets
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@@ -60,15 +60,20 @@ Minimum | Maximum | Average | Standard deviation | Lost packets
An UDP packet is periodically sent from one board to another using a real time thread. The receiving board calculates the intervals between the packets it receives, and sees how much it differs from the scheduled interval.
An UDP packet is periodically sent from one board to another using a real time thread. The receiving board calculates the intervals between the packets it receives, and sees how much it differs from the scheduled interval.
**Common test metadata:** Boot Parameters: isolcpus, Interval: 1000us, Task priority: 99, Device and processor load: ssh, route: switch
**Common test metadata:** Boot Parameters: isolcpus, Interval: 1000us, Task priority: 99, Device and processor load: ssh
Metadata | Minimum | Maximum | Average | Standard deviation | Lost packets
Metadata | Minimum | Maximum | Average | Standard deviation | Lost packets
An UDP packet is periodically sent from one board to another using a real time thread. The receiving board uses the SO_TIMESTAMPING option to see when the packet entered the kernel, and generates timestamps with clock_gettime once the packets enters userspace to compute the time the packet spent in kernel space.
An UDP packet is periodically sent from one board to another using a real time thread. The receiving board uses the SO_TIMESTAMPING option to see when the packet entered the kernel, and generates timestamps with clock_gettime once the packets enters userspace to compute the time the packet spent in kernel space.
**Common test metadata:** Linux kernel version: 4.19-debian, Boot Parameters: isolcpus, Interval: 1000us, ETF qdisc delta: 160us, Task priority: 99, Device and processor load: ssh, Test duration: 0h59, qdisc: etf, etf_offset: 600us, route: switch
**Common test metadata:** Linux kernel version: 4.19-debian, Boot Parameters: isolcpus, Interval: 1000us, ETF qdisc delta: 160us, Task priority: 99, Device and processor load: ssh, Test duration: 0h59, qdisc: etf, etf_offset: 600us, route: switch, Ethernet speed in Mb/s: 100
Minimum | Maximum | Average | Standard deviation | Lost packets
Minimum | Maximum | Average | Standard deviation | Lost packets