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2026-09-20 - 09:48
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackfslot7.osadl.org (updated Sun Sep 20, 2026 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3901567999658,19cyclictest781ktimers/621:55:066
3901567997315,39cyclictest3933241-21meminfo20:05:216
3901567997214,19cyclictest0-21swapper/619:25:566
3901567997213,21cyclictest3905904-21ld19:15:216
3901567997212,21cyclictest3942312-21sed20:20:286
3901567997114,18cyclictest0-21swapper/600:21:416
3901567996830,19cyclictest3918122-21/usr/sbin/munin19:40:026
390156799657,39cyclictest4021232-21/usr/sbin/munin22:45:196
3901567996424,19cyclictest0-21swapper/600:06:296
390156799623,59cyclictest3996540-21ntpq22:00:196
390156399622,59cyclictest0-21swapper/222:50:172
390156799613,39cyclictest3936144-21collect220:10:206
3901567996123,0cyclictest0-21swapper/600:00:246
3901567996121,40cyclictest0-21swapper/620:00:456
3901567996021,39cyclictest3950571-21taskset20:36:246
3901567996021,39cyclictest3950571-21taskset20:36:236
3901567996021,0cyclictest0-21swapper/622:35:176
390156799600,39cyclictest236199-21snmpd19:56:306
3901567995920,39cyclictest7850ktimers/620:18:476
3901567995920,0cyclictest0-21swapper/620:28:276
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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