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2026-05-24 - 20:45
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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 rackeslot6.osadl.org (updated Sun May 24, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
140215799126115,8cyclictest1460180-21latency_hist10:10:020
140215799118107,8cyclictest1508523-21latency_hist12:40:010
14021609911199,9cyclictest1485922-21latency_hist11:30:011
14021609910899,7cyclictest1213033-21systemd-journal09:10:001
14021579910899,6cyclictest1473913-21kworker/u8:1+flush-179:011:05:170
14021579910698,5cyclictest1429640-21kworker/u8:1+flush-179:008:50:000
14021609910494,7cyclictest1494133-21latency_hist11:55:011
14021609910090,7cyclictest1419857-21latency_hist08:05:001
1402157999989,7cyclictest1418260-21latency_hist08:00:010
1402160999885,9cyclictest1213033-21systemd-journal09:55:001
1402160999284,5cyclictest1436011-21kworker/u8:0+flush-179:009:00:181
1402157999282,7cyclictest1437604-21kworker/u8:2+flush-179:009:15:220
1402160999181,7cyclictest1464963-21latency_hist10:25:001
1402157999081,6cyclictest1495726-21latency_hist12:00:010
1402157998982,5cyclictest1213033-21systemd-journal07:30:000
1402157998980,6cyclictest1448757-21kworker/u8:2+flush-179:009:35:160
1402157998978,8cyclictest1414276-21kworker/u8:1+flush-179:008:25:220
1402157998877,8cyclictest1-21systemd09:55:010
1402157998578,5cyclictest1419892-21kworker/u8:3+flush-179:008:10:260
1402160998478,4cyclictest1414276-21kworker/u8:1+events_unbound07:50:001
1402157998374,6cyclictest1445631-21kworker/u8:1+flush-179:009:30:160
140215799820,80cyclictest1484343-21turbostat11:29:550
1402160998176,4cyclictest1445631-21kworker/u8:1+flush-179:010:10:231
1402160998176,4cyclictest1445631-21kworker/u8:1+flush-179:010:10:221
1402160998175,4cyclictest1450435-21kworker/u8:3+flush-179:009:45:151
1402160998173,6cyclictest1442382-21kworker/u8:0+flush-179:009:15:001
1402157998172,7cyclictest1441066-21apt-get09:10:110
1402157998069,8cyclictest1488310-21diskstats11:35:140
1402160997969,7cyclictest1429897-21kworker/u8:3+flush-179:008:45:231
1402157997970,7cyclictest1213033-21systemd-journal09:04:590
1402157997872,5cyclictest1461218-21kworker/u8:2+events_unbound10:15:000
1402157997872,5cyclictest1461218-21kworker/u8:2+events_unbound10:15:000
1402157997871,5cyclictest1427000-21kworker/u8:2+events_unbound08:30:130
1402160997771,5cyclictest1482783-21kworker/u8:2+events_unbound11:35:001
1402160997770,5cyclictest1402020-21latency_hist07:10:011
1402160997770,5cyclictest1402020-21latency_hist07:10:011
1402157997772,4cyclictest1439259-21kworker/u8:3+flush-179:009:20:250
1402157997768,6cyclictest1490943-21kworker/u8:0+events_unbound11:50:230
1402160997671,4cyclictest1482783-21kworker/u8:2+events_unbound11:45:011
1402160997669,5cyclictest1490943-21kworker/u8:0+flush-179:011:55:211
1402160997669,5cyclictest1479534-21kworker/u8:3+flush-179:012:20:211
1402160997669,5cyclictest1405481-21kworker/u8:2+flush-179:007:25:161
1402160997568,6cyclictest1416896-21kworker/u8:0+flush-179:008:10:011
1402157997569,4cyclictest1479534-21kworker/u8:3+flush-179:012:30:160
1402157997568,5cyclictest1416896-21kworker/u8:0+events_unbound08:10:010
1402157997567,6cyclictest1464944-21kworker/u8:2+flush-179:010:30:210
1402160997367,4cyclictest1405481-21kworker/u8:2+flush-179:007:35:171
1402160997265,5cyclictest744157-21kworker/u8:1+events_unbound07:30:161
1402160997264,6cyclictest1442382-21kworker/u8:0+flush-179:009:40:021
1402157997266,4cyclictest1469694-21kworker/u8:0+flush-179:010:45:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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