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2025-11-07 - 11:55
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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 50 highest latencies:
System rackfslot7.osadl.org (updated Fri Nov 07, 2025 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3989490999233,19cyclictest871-21mta-sts-daemon23:55:155
3989490998930,20cyclictest4104809-21/usr/sbin/munin22:30:235
3989490997616,59cyclictest4022381-21ntpq20:05:245
3989490997414,20cyclictest0-21swapper/519:18:435
3989490997333,39cyclictest4113712-21kworker/u32:2+ext4-rsv-conversion00:05:005
3989490997314,0cyclictest0-21swapper/521:28:175
3989490997213,19cyclictest0-21swapper/522:52:375
3989490997213,19cyclictest0-21swapper/521:56:295
3989490997213,19cyclictest0-21swapper/519:41:055
3989490997212,59cyclictest0-21swapper/522:24:045
3989490997212,59cyclictest0-21swapper/519:47:405
3989490997112,19cyclictest0-21swapper/521:12:365
3989490997112,19cyclictest0-21swapper/520:43:055
3989490997112,19cyclictest0-21swapper/519:34:455
3989490997111,59cyclictest0-21swapper/521:04:005
3989490997031,19cyclictest0-21swapper/522:00:035
3989490997029,19cyclictest1-21systemd19:30:015
3989490997012,0cyclictest0-21swapper/523:48:375
3989490997012,0cyclictest0-21swapper/523:48:365
3989490997011,19cyclictest0-21swapper/520:18:055
398949099689,19cyclictest0-21swapper/521:20:175
3989490996829,19cyclictest0-21swapper/522:09:155
398948599689,19cyclictest0-21swapper/021:10:170
398949099668,39cyclictest4056026-21ntpq21:05:195
398949099668,19cyclictest0-21swapper/519:11:245
3989490996425,39cyclictest1-21systemd20:35:015
3989490996425,19cyclictest4127325-21ntp_states23:10:205
3989490996425,19cyclictest0-21swapper/521:51:115
3989490996224,19cyclictest6950ktimers/520:21:515
3989490996223,19cyclictest0-21swapper/500:38:515
398949099613,21cyclictest0-21swapper/520:49:415
398949099602,20cyclictest0-21swapper/522:56:535
3989490995920,0cyclictest0-21swapper/523:53:205
398949099591,20cyclictest0-21swapper/520:29:175
398949099590,59cyclictest0-21swapper/500:17:335
3989490995819,0cyclictest0-21swapper/523:05:255
398949099580,39cyclictest4077911-21basename21:45:185
3989490995738,19cyclictest4020033-21timerwakeupswit20:00:255
3989490995717,19cyclictest871-21mta-sts-daemon22:46:525
3989490995617,39cyclictest1089-21snmpd22:11:025
3989490995616,19cyclictest872-21mta-sts-daemon21:38:045
3989490995616,19cyclictest4135518-21memory23:25:195
3989490995615,0cyclictest0-21swapper/523:20:405
3989490995614,41cyclictest0-21swapper/520:50:135
3989490995516,19cyclictest0-21swapper/523:32:455
3989490995515,19cyclictest0-21swapper/523:15:135
3989490995515,19cyclictest0-21swapper/522:27:175
3989490995515,19cyclictest0-21swapper/520:35:095
3989490995515,19cyclictest0-21swapper/519:53:175
3989490995515,19cyclictest0-21swapper/519:53:175
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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