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2026-08-11 - 08:20
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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 792 highest latencies:
System rack6slot5.osadl.org (updated Tue Aug 11, 2026 00:43:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
233409996495112,4527cyclictest2986-21kworker/0:119:15:310
233409974663981,3442cyclictest2986-21kworker/0:119:14:050
231502779186,202sleep00-21swapper19:09:040
233409950452,438cyclictest3728-21diskmemload22:44:090
233409949529,453cyclictest32219-21kworker/u2:222:17:210
233409949331,402cyclictest31190-21ssh00:35:270
233409949144,386cyclictest4285-21lldpd23:38:500
233409948835,439cyclictest3728-21diskmemload21:24:290
233409948834,440cyclictest14634-21ssh21:33:240
233409948734,439cyclictest29460-21ssh23:19:070
233409948734,439cyclictest23577-21ssh00:16:590
233409948635,438cyclictest12279-21ssh21:27:490
233409948633,440cyclictest3728-21diskmemload21:18:150
233409948532,439cyclictest14826-21ssh23:57:590
233409948432,439cyclictest4305-21snmpd00:02:220
233409947935,384cyclictest4305-21snmpd00:32:480
233409947534,380cyclictest23333-21cyclictest23:31:570
233409947031,378cyclictest19892-21mailstats00:10:140
233409946833,375cyclictest9786-21smartctl23:46:170
233409946439,365cyclictest0-21swapper21:12:460
233409945114,87cyclictest4924-21runrttasks22:27:480
233409944932,355cyclictest31434-21chrt23:22:460
233409942555,357cyclictest3728-21diskmemload22:08:190
233409941833,370cyclictest4224-21lldpd21:57:000
233409941829,375cyclictest19307-21ssh22:55:480
233409941238,374cyclictest0-21swapper23:03:510
233409941156,176cyclictest7248-21kworker/u2:322:52:340
233409941154,296cyclictest4924-21runrttasks00:05:170
233409941152,300cyclictest4924-21runrttasks20:50:410
233409941136,360cyclictest7849-21ssh23:41:390
233409941056,294cyclictest23980-21cut21:55:030
233409941037,373cyclictest0-21swapper23:09:350
233409940951,344cyclictest11098-21awk23:50:230
233409940934,362cyclictest27771-21idleruntime19:20:170
233409940932,363cyclictest4924-21runrttasks22:47:250
233409940918,377cyclictest10362-21sshd22:35:460
233409940853,295cyclictest3728-21diskmemload22:10:540
233409940852,342cyclictest3765-21ssh22:21:000
233409940834,361cyclictest19174-21ssh21:43:410
233409940755,293cyclictest25324-21munin-node23:10:350
233409940750,343cyclictest7790-21ssh22:30:330
233409940734,253cyclictest4924-21runrttasks21:03:450
233409940653,339cyclictest27371-21chrt20:45:270
233409940635,358cyclictest12-21rcu_preempt00:22:280
233409940552,292cyclictest14977-21grep20:10:540
233409940354,289cyclictest12991-21python20:05:480
233409940333,356cyclictest6946-21df19:50:280
233409940332,358cyclictest21632-21ssh21:49:450
233409940254,288cyclictest32189-21awk23:25:230
233409940232,356cyclictest16988-21ssh21:39:010
233409940074,312cyclictest3728-21diskmemload22:03:480
233409939737,250cyclictest21322-21kworker/u2:200:26:540
233409939618,365cyclictest18737-21fschecks_time20:20:550
233409939349,344cyclictest0-21swapper21:08:360
233409939219,360cyclictest4305-21snmpd19:43:190
233409939173,304cyclictest4924-21runrttasks19:55:510
233409939127,351cyclictest19491-21munin-node20:25:120
233409939034,341cyclictest31476-21basename19:30:170
233409938752,163cyclictest24705-21seq20:38:010
233409938632,340cyclictest30306-21strings19:25:400
233409938255,313cyclictest32421-21date21:00:030
233409937731,346cyclictest0-21swapper20:17:580
233409937333,279cyclictest22012-21cut20:30:330
233409937231,327cyclictest4759-21df19:45:180
233409937132,280cyclictest876-21ntp_states19:35:140
233409936931,278cyclictest11791-21sshd20:03:460
233409933735,289cyclictest0-21swapper20:42:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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