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2024-11-22 - 16:48
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rackbslot1.osadl.org (updated Fri Nov 22, 2024 12:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4143732211187,14sleep10-21swapper/107:06:211
4145872209181,19sleep30-21swapper/307:09:023
4143842203174,19sleep20-21swapper/207:06:292
4146092197169,19sleep00-21swapper/007:09:200
66652121390,1sleep0666510-21snmp_ryswitch.c11:55:020
51524921050,2sleep20-21swapper/209:00:152
6577272860,1sleep1657705-21snmp_wanpowerct11:45:051
6577272860,1sleep1657705-21snmp_wanpowerct11:45:051
414842996258,3cyclictest409982-21kworker/u8:3+flush-179:007:20:000
6651972560,0chrt665194-21ntpq11:50:283
414845995649,5cyclictest518452-21/usr/share/muni09:05:111
414845995649,5cyclictest518452-21/usr/share/muni09:05:101
414850995449,3cyclictest657585-21snmp_wanswitch.11:45:032
414850995449,3cyclictest657585-21snmp_wanswitch.11:45:022
414842995350,2cyclictest577256-21kworker/u8:3+flush-179:010:45:050
414852995046,3cyclictest564900-21/usr/share/muni10:00:053
414852995044,4cyclictest491706-21/usr/share/muni08:35:093
7030732490,1chrt703072-21apache_accesses12:35:142
414842994945,3cyclictest544502-21/usr/share/muni09:35:090
414852994832,15cyclictest242500-1kworker/3:2H+kblockd10:29:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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