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2021-09-28 - 09:50

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #1
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rackdslot1.osadl.org (updated Tue Sep 28, 2021 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
730123540,8sleep37274-21sh19:06:263
730123540,8sleep37274-21sh19:06:263
122923180,6sleep01238-21od19:09:030
122923180,6sleep01238-21od19:09:020
2515823020,7sleep225118-21sh19:09:522
2515823020,7sleep225118-21sh19:09:522
1876622840,4sleep118782-21sort19:08:341
1876622840,4sleep118782-21sort19:08:331
119221710,7sleep33074699cyclictest00:20:093
286092910,5sleep028619-21od19:11:010
30743998772,7cyclictest25-21ksoftirqd/122:15:151
3074599840,3cyclictest121rcu_preempt19:25:142
274692790,6sleep227437-21sh19:10:592
130602780,7sleep23074599cyclictest23:15:082
61922770,3sleep16194-21cpuspeed_turbos21:05:191
114691710,2ptp4l0-21swapper/023:17:290
114691690,2ptp4l0-21swapper/023:40:240
44802680,4sleep34458-21diskstats19:10:143
114691680,2ptp4l0-21swapper/323:20:153
30741996757,5cyclictest9-21ksoftirqd/022:30:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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