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2026-05-21 - 16:52
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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 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
1507197998883,4cyclictest1594467-21kworker/u8:1+events_unbound11:40:231
1507197998883,4cyclictest1533106-21kworker/u8:3+events_unbound08:30:231
1507197998883,4cyclictest1502604-21kworker/u8:3+events_unbound07:15:251
1507197998882,4cyclictest1552285-21kworker/u8:0+events_unbound09:35:201
1507196998879,6cyclictest1563382-21kworker/u8:0+flush-179:010:55:210
1507197998782,4cyclictest1502604-21kworker/u8:3+events_unbound07:40:231
1507197998774,11cyclictest1605572-21apt-get12:15:001
1507197998676,7cyclictest1524913-21latency_hist08:05:011
1507196998677,6cyclictest1587529-21latency_hist11:20:010
1507197998579,4cyclictest1563382-21kworker/u8:0+events_unbound10:05:211
1507196998570,11cyclictest1609297-21apt-get12:25:010
1507197998479,4cyclictest1563382-21kworker/u8:0+events_unbound10:30:241
1507196998476,5cyclictest1502604-21kworker/u8:3+flush-179:007:15:180
1507196998375,5cyclictest1531268-21kworker/u8:1+events_unbound08:25:010
1507197998277,3cyclictest1599168-21kworker/u8:2+events_unbound12:00:241
1507196998275,4cyclictest1537634-21kworker/u8:3+flush-179:008:50:140
1507197998176,4cyclictest1599168-21kworker/u8:2+events_unbound12:20:241
1507197998176,3cyclictest1537634-21kworker/u8:3+flush-179:008:50:191
1507197998175,4cyclictest1591117-21kworker/u8:3+events_unbound11:45:211
1507196998174,4cyclictest1521749-21kworker/u8:1+flush-179:007:55:220
1507196998173,5cyclictest1502604-21kworker/u8:3+flush-179:007:40:210
1507196998167,9cyclictest1535510-21kworker/u8:1+flush-179:008:45:170
1507197998071,5cyclictest1561802-21latency_hist10:00:011
1507197998070,8cyclictest1579562-21apt-get10:55:111
1507197997973,4cyclictest1573173-21kworker/u8:3+flush-179:010:35:271
1507197997873,4cyclictest1526533-21kworker/u8:0+flush-179:008:35:201
1507197997873,4cyclictest1526533-21kworker/u8:0+flush-179:008:35:201
1507197997873,4cyclictest1486671-21kworker/u8:1+events_unbound07:30:221
1507197997771,4cyclictest1563382-21kworker/u8:0+events_unbound11:15:161
1507196997769,6cyclictest1524504-21kworker/u8:3+flush-179:008:05:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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