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2022-08-16 - 05:31

ARM Broadcom BCM2711 @1500 MHz, Linux 5.10.52-rt47-v7l (Profile)

Latency plot of system in rack #4, slot #1
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 376 highest latencies:
System rack4slot1.osadl.org (updated Mon Aug 15, 2022 19:20:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
215572790,2chrt0-21swapper/219:17:092
215572790,2chrt0-21swapper/219:17:092
187682680,10sleep121-21ksoftirqd/119:12:021
187682680,10sleep121-21ksoftirqd/119:12:021
18570995113,7cyclictest131rcu_preempt19:11:592
18570995113,7cyclictest131rcu_preempt19:11:592
1856899351,28cyclictest20603-21cut19:16:520
180592346,21sleep30-21swapper/319:08:543
180592346,21sleep30-21swapper/319:08:543
180242316,19sleep20-21swapper/219:08:292
180242316,19sleep20-21swapper/219:08:292
179922316,19sleep10-21swapper/119:08:041
179922316,19sleep10-21swapper/119:08:041
180382306,18sleep00-21swapper/019:08:390
180382306,18sleep00-21swapper/019:08:390
1856899256,3cyclictest141rcub/019:12:140
1856899223,5cyclictest131rcu_preempt19:17:110
1856899223,5cyclictest131rcu_preempt19:17:110
1856999206,3cyclictest21-21ksoftirqd/119:17:111
1856999206,3cyclictest21-21ksoftirqd/119:17:111
1857199192,11cyclictest0-21swapper/319:16:493
1857199192,11cyclictest0-21swapper/319:16:493
1857199127,4cyclictest33-21ksoftirqd/319:20:563
1857199127,4cyclictest33-21ksoftirqd/319:20:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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