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2022-10-04 - 08:52

x86 Intel Xeon E5620 @2400 MHz, Linux 4.19.127-rt55 (Profile)

Latency plot of system in rack #c, 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 -Up99 -i200 -h400 --smi -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 rackcslot0.osadl.org (updated Tue Oct 04, 2022 00:43:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2698721810,1sleep12081099cyclictest21:52:161
2702321400,7sleep82082199cyclictest22:07:0514
202352130103,22sleep00-21swapper/019:17:090
647521250,4sleep00-21swapper/021:49:020
20018212590,29sleep20-21swapper/219:14:148
1827821240,0sleep20-21swapper/222:54:528
3207021210,1sleep111051ktimersoftd/1122:17:343
3162121200,1sleep00-21swapper/022:37:110
2466521160,1sleep50-21swapper/522:50:5511
2466521160,1sleep50-21swapper/522:50:5511
1778721160,1sleep120-21swapper/1221:41:294
2093021150,0sleep40-21swapper/422:45:3310
2093021150,0sleep40-21swapper/422:45:3310
2442421050,2sleep60-21swapper/600:22:2512
1008721050,0sleep30-21swapper/323:08:489
275762970,0sleep60-21swapper/622:11:5212
174442970,1sleep80-21swapper/821:50:4614
94292960,0sleep130-21swapper/1323:13:315
43292960,0sleep10-21swapper/123:27:451
158642960,5sleep02080999cyclictest22:44:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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