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2022-10-03 - 03:35

x86 Intel Xeon E3-1220L V2 @2300 MHz, Linux 4.4.229-rt200 (Profile)

Latency plot of system in rack #1, slot #2
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 -n -a -t3 -p99 -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 20 highest latencies:
System rack1slot2.osadl.org (updated Mon Oct 03, 2022 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1416423726,0sleep20-21swapper/218:39:192
1398823627,0sleep30-21swapper/318:37:163
1432623324,0sleep10-21swapper/118:41:101
1408222824,0sleep00-21swapper/018:38:210
28005070,0irq/28-eth0-rx-13673-21munin-node20:56:383
144139976,0cyclictest0-21swapper/222:56:422
144129973,0cyclictest15668-21sadc23:01:211
144129970,0cyclictest15232-21sh22:24:361
144129970,0cyclictest0-21swapper/119:37:031
8315060,0irq/26-0000:00:10899-21uptime19:01:522
4160,0ktimersoftd/00-21swapper/021:13:410
339960,0migration/3496-21latency_hist19:21:213
339960,0migration/34919-21sh21:41:503
339960,0migration/33165-21sh00:03:143
339960,0migration/326719-21latency22:46:423
339960,0migration/325695-21sh21:20:133
339960,0migration/320658-21runrttasks21:34:423
339960,0migration/313204-21munin-node22:21:503
339960,0migration/310808-21sh22:40:253
329960,0watchdog/317300-21ntp_states20:36:453
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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