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2021-01-17 - 22:46

Intel(R) Xeon(R) CPU E3-1578L v5 @ 2.00GHz, Linux 4.19.1-rt3 (Profile)

Latency plot of system in rack #5, slot #3
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 -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 50 highest latencies:
System rack5slot3.osadl.org (updated Sun Jan 17, 2021 12:49:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24797994543,1cyclictest3922-21apt-get07:30:027
2474699430,0cyclictest0-21swapper/207:25:042
24788994210,12cyclictest121rcu_preempt08:55:146
24797993838,0cyclictest0-21swapper/707:50:017
24788993810,10cyclictest121rcu_preempt10:23:466
24769993737,0cyclictest0-21swapper/410:05:024
24761993735,1cyclictest0-21swapper/308:20:093
24761993710,3cyclictest0-21swapper/309:53:253
24788993510,17cyclictest0-21swapper/608:25:046
24797993434,0cyclictest0-21swapper/709:50:127
2478899340,33cyclictest0-21swapper/607:50:016
24788993310,21cyclictest0-21swapper/611:21:166
24788993310,21cyclictest0-21swapper/608:40:006
24788993310,14cyclictest121rcu_preempt10:03:016
24788993210,15cyclictest0-21swapper/609:51:506
24788993210,13cyclictest0-21swapper/608:50:006
24788993110,17cyclictest0-21swapper/609:56:066
24779993131,0cyclictest0-21swapper/509:55:095
24737993130,1cyclictest0-21swapper/108:20:101
2478899300,0cyclictest0-21swapper/607:20:036
2478899290,28cyclictest0-21swapper/607:55:146
24797992828,0cyclictest0-21swapper/708:40:037
24788992813,6cyclictest121rcu_preempt08:40:016
24788992810,13cyclictest0-21swapper/608:50:156
24746992810,7cyclictest0-21swapper/208:40:072
24737992810,11cyclictest0-21swapper/108:55:131
2477999270,26cyclictest0-21swapper/508:50:175
24761992710,7cyclictest0-21swapper/310:01:313
2473799270,0cyclictest0-21swapper/109:57:591
24797992626,0cyclictest0-21swapper/707:15:097
2478899260,25cyclictest0-21swapper/607:20:006
24797992510,0cyclictest0-21swapper/707:10:257
24788992510,9cyclictest0-21swapper/607:45:166
24788992510,11cyclictest121rcu_preempt07:25:066
24761992510,4cyclictest0-21swapper/307:20:083
24761992510,3cyclictest0-21swapper/308:55:143
24746992525,0cyclictest0-21swapper/210:22:582
24746992525,0cyclictest0-21swapper/208:55:092
24746992510,7cyclictest0-21swapper/211:20:142
2473799251,12cyclictest0-21swapper/107:45:151
24727992510,7cyclictest0-21swapper/008:25:040
24779992423,0cyclictest0-21swapper/508:00:065
24727992424,0cyclictest0-21swapper/008:55:090
24788992310,3cyclictest0-21swapper/607:30:036
24769992321,1cyclictest763-21nscd10:01:034
2474699230,0cyclictest0-21swapper/208:45:022
24737992310,5cyclictest0-21swapper/108:50:031
24737992310,4cyclictest0-21swapper/108:40:031
24797992210,6cyclictest0-21swapper/708:45:097
24779992222,0cyclictest30781-21apt-get08:25:045
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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