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2026-05-22 - 03:06
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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 rackeslot6.osadl.org (updated Thu May 21, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
150719799127110,12cyclictest1213033-21systemd-journal10:30:001
15071979910798,6cyclictest1577719-21latency_hist10:50:011
15071979910599,5cyclictest1502604-21kworker/u8:3+flush-179:007:35:211
15071969910392,7cyclictest1600833-21kworker/u8:3+flush-179:012:05:000
15071969910092,5cyclictest1544330-21kworker/u8:3+flush-179:009:25:220
1507197999991,6cyclictest1542658-21kworker/u8:1+flush-179:009:25:001
1507197999691,4cyclictest1599168-21kworker/u8:2+flush-179:012:35:231
1507197999589,4cyclictest1591117-21kworker/u8:3+events_unbound11:35:151
1507196999579,10cyclictest1486671-21kworker/u8:1+flush-179:007:30:160
1507197999386,5cyclictest1520363-21kworker/u8:0+events_unbound07:55:141
1507197999382,7cyclictest1611122-21latency_hist12:30:001
1507196999381,9cyclictest1536062-21latency_hist08:40:010
1507196999381,9cyclictest1536062-21latency_hist08:40:010
1507197999288,3cyclictest1544330-21kworker/u8:3+events_unbound09:10:261
1507197999286,4cyclictest1600833-21kworker/u8:3+events_unbound12:05:131
1507197999284,6cyclictest1555391-21kworker/u8:1+events_unbound09:50:221
1507197999186,4cyclictest1526533-21kworker/u8:0+flush-179:008:40:231
1507197999085,4cyclictest1555391-21kworker/u8:1+events_unbound09:40:231
1507197998983,5cyclictest1600833-21kworker/u8:3+events_unbound12:15:031
1507197998983,5cyclictest1600833-21kworker/u8:3+events_unbound12:15:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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