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2019-07-17 - 03:23

(undisclosed), Linux 4.9.20-rt16 (Profile)

Latency plot of system in rack #7, 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 -Sp99 -i200 -h400 -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 rack7slot1.osadl.org (updated Mon Jul 15, 2019 00:46:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4493211854,59sleep20-21swapper/219:07:162
4460211655,56sleep00-21swapper/019:06:500
4691211353,55sleep30-21swapper/319:09:383
4585210550,50sleep10-21swapper/119:08:141
214042530,1sleep024426-21stress22:15:440
4923994915,14cyclictest0-21swapper/000:04:100
214022470,1sleep324428-21stress22:15:433
211442470,1sleep024428-21stress23:33:580
13482440,1sleep224426-21stress00:02:332
492399435,36cyclictest0-21swapper/020:15:090
4923994025,13cyclictest0-21swapper/020:01:100
4943993915,22cyclictest0-21swapper/321:41:003
4923993925,13cyclictest0-21swapper/019:26:200
4923993915,21cyclictest0-21swapper/023:00:190
493199388,15cyclictest0-21swapper/121:15:251
493199386,16cyclictest0-21swapper/122:05:051
493199385,15cyclictest0-21swapper/123:17:521
4923993824,13cyclictest0-21swapper/019:48:090
97912375,13sleep30-21swapper/319:19:413
94652375,14sleep20-21swapper/219:15:542
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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