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2026-08-19 - 01:15
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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 Tue Aug 18, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8905099148137,8cyclictest140568-21latency_hist09:50:011
8905099135128,5cyclictest150428-21kworker/u8:3+events_unbound10:50:001
8905099135126,6cyclictest143758-21latency_hist10:00:011
8905099132123,7cyclictest1213033-21systemd-journal11:15:001
8905099132120,9cyclictest1213033-21systemd-journal07:45:001
8905099130124,4cyclictest155137-21kworker/u8:0+flush-179:011:00:011
8905099130118,10cyclictest510-21rs:main1
8905099127117,8cyclictest98705-21kworker/u8:0+flush-179:007:55:011
8905099126120,4cyclictest155137-21kworker/u8:0+flush-179:011:00:251
8904799126114,9cyclictest131009-21latency_hist09:20:000
8905099122116,4cyclictest180072-21kworker/u8:0+events_unbound11:50:251
8904799122111,8cyclictest145348-21latency_hist10:05:000
8905099121115,4cyclictest189435-21kworker/u8:0+events_unbound12:40:011
8905099120114,4cyclictest173427-21kworker/u8:1+events_unbound12:04:591
8905099120113,5cyclictest86648-21kworker/u8:1+flush-179:007:35:001
8905099120112,5cyclictest86648-21kworker/u8:1+events_unbound07:15:141
8905099117111,3cyclictest150428-21kworker/u8:3+events_unbound10:55:011
8904799117107,6cyclictest180072-21kworker/u8:0+flush-179:011:50:010
8905099115107,6cyclictest146396-21kworker/u8:2+flush-179:010:10:151
8905099115103,5cyclictest88848-21kworker/u8:3+events_unbound07:40:001
8904799115105,7cyclictest146396-21kworker/u8:2+flush-179:010:30:170
890509911388,17cyclictest119400-21kworker/u8:3+flush-179:008:55:241
8905099113103,7cyclictest1213033-21systemd-journal08:35:011
8905099112102,7cyclictest143145-21kworker/u8:0+events_unbound10:05:241
8905099111105,4cyclictest127606-21kworker/u8:0+events_unbound09:20:231
8905099111104,5cyclictest98705-21kworker/u8:0+flush-179:008:30:001
8905099111103,6cyclictest155137-21kworker/u8:0+flush-179:011:25:001
8904799111101,7cyclictest113978-21journal-offline08:25:220
890509911097,11cyclictest1213033-21systemd-journal09:10:001
8905099110104,4cyclictest173427-21kworker/u8:1+flush-179:011:45:211
8905099110104,4cyclictest143145-21kworker/u8:0+flush-179:010:00:241
8905099110101,6cyclictest104391-21kworker/u8:1+flush-179:008:10:201
8905099108103,4cyclictest173427-21kworker/u8:1+flush-179:011:45:001
890479910898,7cyclictest88782-21latency_hist07:10:030
890479910895,9cyclictest148530-21apt-get10:15:010
8905099107101,4cyclictest86648-21kworker/u8:1+flush-179:007:25:251
890479910791,12cyclictest95485-21kworker/u8:2+flush-179:007:45:210
890509910699,6cyclictest185107-21kworker/u8:3+flush-179:012:10:241
890509910396,5cyclictest124736-21kworker/u8:1+flush-179:009:15:231
890509910296,4cyclictest127606-21kworker/u8:0+flush-179:009:25:151
890509910296,4cyclictest101868-21kworker/u8:3+events_unbound07:55:201
890509910295,6cyclictest132656-21kworker/u8:3+flush-179:009:50:241
890509910292,8cyclictest150648-21apt-get10:20:121
890509910289,4cyclictest173427-21kworker/u8:1+events_unbound12:05:241
890509910196,4cyclictest109225-21kworker/u8:2+flush-179:008:45:271
890509910195,4cyclictest173427-21kworker/u8:1+flush-179:011:30:211
890509910192,6cyclictest138981-21latency_hist09:45:001
890509910096,3cyclictest119400-21kworker/u8:3+flush-179:009:00:211
890509910095,4cyclictest109225-21kworker/u8:2+flush-179:008:45:001
89050999994,4cyclictest189435-21kworker/u8:0+flush-179:012:15:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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