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2021-01-19 - 06:12

Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, Linux 5.9.0-rc2-rt1 (Profile)

Latency plot of system in rack #4, slot #6
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 -h200 -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 rack4slot6.osadl.org (updated Tue Jan 19, 2021 00:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1483729065,12sleep70-21swapper/719:09:507
2334528961,12pltrace0-21swapper/019:05:570
1458728956,11sleep30-21swapper/319:06:173
2334528756,12pltrace0-21swapper/419:08:354
1473728570,11sleep20-21swapper/219:08:242
1452228358,12sleep50-21swapper/519:05:225
1472728166,11sleep10-21swapper/119:08:151
1481627155,12sleep60-21swapper/619:09:326
83452630,0sleep10-21swapper/122:44:361
204782580,0sleep70-21swapper/700:00:207
1511599241,22cyclictest0-21swapper/619:15:156
32062200,1sleep649-21ksoftirqd/620:50:016
276192200,3sleep61511599cyclictest19:35:036
234392190,0chrt0-21swapper/321:18:583
188442170,0sleep70-21swapper/700:30:177
233452160,1pltrace0-21swapper/523:44:595
233452150,1pltrace0-21swapper/123:25:151
1510299151,2cyclictest0-21swapper/422:20:064
1509199151,9cyclictest0-21swapper/221:50:002
1509199150,9cyclictest0-21swapper/219:55:002
1509199150,11cyclictest0-21swapper/222:45:072
133462150,0sleep40-21swapper/423:54:574
233452142,5pltrace0-21swapper/022:31:570
233452140,2pltrace7452-21ssh22:42:440
233452140,1pltrace0-21swapper/121:30:061
233452140,1pltrace0-21swapper/000:30:090
233452140,1pltrace0-21swapper/000:05:040
193252140,1chrt0-21swapper/621:47:376
174732140,0sleep20-21swapper/222:17:062
168592140,2sleep3311ksoftirqd/319:10:163
1511599141,12cyclictest0-21swapper/623:10:156
1510299140,13cyclictest0-21swapper/419:15:074
1509199141,2cyclictest0-21swapper/222:00:002
1509199141,1cyclictest0-21swapper/223:05:212
1509199140,10cyclictest0-21swapper/223:37:532
1509199140,10cyclictest0-21swapper/222:07:242
233452130,3pltrace0-21swapper/121:00:091
233452130,1pltrace0-21swapper/122:35:081
233452130,1pltrace0-21swapper/000:35:220
15115991312,1cyclictest0-21swapper/620:55:166
1511599130,12cyclictest0-21swapper/600:20:196
1510299131,1cyclictest16117-21tr21:45:054
1510299130,2cyclictest20362-21processes00:00:184
1510299130,2cyclictest1995-21processes20:45:144
1510299130,2cyclictest0-21swapper/420:20:104
1509199131,2cyclictest0-21swapper/200:39:592
1509199131,10cyclictest0-21swapper/220:45:012
1509199130,12cyclictest0-21swapper/222:39:592
1509199130,12cyclictest0-21swapper/221:05:092
233452120,4pltrace0-21swapper/122:51:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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