Commit 0125d4fc authored by Joanne Hugé's avatar Joanne Hugé

Merge branch 'measure-analysis' into dev

parents 99dcbff7 b117373c
......@@ -584,6 +584,9 @@ class MeasureSet:
data['measure_sets'].append(measure_set)
if measure_set['measure_type'] == 'cyclictest_wake-up_latency':
break
return data
def compute_duration(self):
......
......@@ -20,4 +20,19 @@ Measures measuring the same propriety are grouped together in tables and graphs,
* **route**: How the boards are connected. switch means they are connected by a switch (cheap, unmanaged), E2E
* **qdisc**: qdisc used to send packets
### cyclictest_wake-up_latency results
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`
**Common test metadata:** Task priority: 98, Interval: 1000us, Boot Parameters: isolcpus,rcu_nocbs,irqaffinity, ETF qdisc delta: None, Device and processor load: None, qdisc: pfifo_fast
Metadata | Minimum | Maximum | Average | Standard deviation | Lost packets
---------------------------- | ------------------- | ------------------- | ------------------- | ------------------- | ------------
**dev, ker, duration** | **Wake-up latency** | **Wake-up latency** | **Wake-up latency** | **Wake-up latency** |
Shuttle, 4.19, 1h9 (4186784) | 1.0000us | 10.0000us | 1.0149us | 0.1467us | 0
A20, 5.6, 1h10 (4205937) | 8.0000us | 29.0000us | 9.0929us | 0.3028us | 0
![alt text](measures/graphs/cyclictest_wake-up_latencyWake-up latency.png "cyclictest_wake-up_latency Graph")
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\ No newline at end of file
{"measure_sets": [{"measure_type": "cyclictest_wake-up_latency", "props_names": ["Wake-up latency"], "units": ["us"], "middle": 0, "props": [[0, 0, 0, 0, 0, 0, 0, 0, 5247, 3808223, 390802, 1250, 143, 65, 36, 33, 29, 15, 20, 21, 17, 9, 4, 2, 4, 7, 6, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], "props_type": "histogram", "metadata": {"dev": "A20", "ker": "5.6", "prio": "98", "i": "1000us", "boot_p": "isolcpus,rcu_nocbs,irqaffinity", "delta": "None", "load": "None", "duration": "1h10", "speed": "1000", "etf_offset": "500us", "route": "E2E", "qdisc": "pfifo_fast", "lost_packets": "0"}}]}
\ No newline at end of file
{}
\ No newline at end of file
{"cyclictest_wake-up_latency": {"ids": [0, 1], "next_id": 2}}
\ No newline at end of file
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