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2022-10-04 - 08:24

x86 Intel Xeon E3-1220 @3100 MHz, Linux 4.19.8-rt6 (Profile)

Latency plot of system in rack #1, slot #0
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 rack1slot0.osadl.org (updated Wed Aug 03, 2022 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
839825835,7sleep10-21swapper/107:07:581
238772580,0sleep30-21swapper/307:45:193
81462570,0sleep28131-21sshd09:29:512
821825533,6sleep30-21swapper/307:06:063
687025443,7sleep00-21swapper/007:05:040
837225038,7sleep20-21swapper/207:07:462
298822280,9sleep395750irq/24-eno1-rx-09:24:033
51262170,0sleep35128-21bash09:14:253
867299154,3cyclictest33-21ksoftirqd/209:16:212
867299134,2cyclictest33-21ksoftirqd/209:11:462
866299135,3cyclictest25-21ksoftirqd/109:18:181
867999120,11cyclictest31749-21systemd-cgroups09:16:263
867299123,3cyclictest33-21ksoftirqd/209:23:502
866299121,3cyclictest18860-21kworker/1:109:20:431
866299120,3cyclictest25-21ksoftirqd/109:27:101
866299100,9cyclictest0-21swapper/109:09:591
866199100,9cyclictest0-21swapper/009:15:470
86729998,0cyclictest0-21swapper/209:01:142
86729998,0cyclictest0-21swapper/207:50:202
86729990,0cyclictest0-21swapper/208:15:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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