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2026-09-02 - 04:44
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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 Wed Sep 02, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
160876699145136,7cyclictest1672093-21kworker/u8:2+events_unbound22:40:001
160876399145126,16cyclictest1213033-21systemd-journal21:15:000
160876699142131,8cyclictest1713783-21latency_hist00:35:011
160876699142127,12cyclictest1702633-21cupsd00:00:011
160876399142133,5cyclictest1697798-21latency_hist23:45:000
160876699136126,6cyclictest1705814-21latency_hist00:10:011
160876399136128,5cyclictest1646113-21kworker/u8:3+events_unbound21:20:010
160876699128122,4cyclictest1710577-21kworker/u8:4+flush-179:000:25:011
160876399126117,6cyclictest1693557-21kworker/u8:1+flush-179:023:40:020
160876699124118,4cyclictest1659049-21kworker/u8:1+flush-179:022:10:221
160876399123114,5cyclictest1659049-21kworker/u8:1+events_unbound21:50:010
160876399123109,9cyclictest1638086-21kworker/u8:1+flush-179:020:45:210
160876699122117,4cyclictest1694589-21kworker/u8:2+events_unbound23:40:251
160876699119110,6cyclictest1641005-21kworker/u8:2+events_unbound21:25:191
160876699118114,3cyclictest1623025-21kworker/u8:3+flush-179:020:00:251
160876699116108,7cyclictest1672093-21kworker/u8:2+events_unbound23:05:021
160876399116104,9cyclictest1213033-21systemd-journal21:00:210
160876699115108,5cyclictest1646113-21kworker/u8:3+events_unbound21:10:201
160876399115103,8cyclictest1632790-21kworker/u8:0+flush-179:020:30:180
160876699114106,6cyclictest1632790-21kworker/u8:0+events_unbound20:55:031
160876699114106,6cyclictest1618257-21kworker/u8:2+events_unbound20:05:231
160876699112107,4cyclictest1689795-21kworker/u8:0+flush-179:023:30:221
160876399112102,7cyclictest1681602-21latency_hist22:55:020
160876399112102,7cyclictest1681602-21latency_hist22:55:010
160876699111106,3cyclictest1659049-21kworker/u8:1+events_unbound22:25:151
160876699111105,4cyclictest1646113-21kworker/u8:3+flush-179:021:30:211
160876699111104,6cyclictest1667244-21kworker/u8:0+events_unbound22:20:251
160876699111103,6cyclictest1672093-21kworker/u8:2+events_unbound22:55:221
160876399111101,6cyclictest1632790-21kworker/u8:0+flush-179:020:25:180
160876699110106,3cyclictest1693557-21kworker/u8:1+events_unbound23:35:251
160876699109101,5cyclictest1646113-21kworker/u8:3+events_unbound21:40:141
160876699108103,4cyclictest1678466-21kworker/u8:1+events_unbound22:45:281
16087669910797,8cyclictest1712196-21latency_hist00:30:001
160876699107102,4cyclictest1689795-21kworker/u8:0+events_unbound23:20:151
16087639910797,7cyclictest1678466-21kworker/u8:1+flush-179:023:05:210
16087669910698,6cyclictest1697776-21kworker/u8:0+events_unbound23:55:001
16087669910694,9cyclictest1689826-21latency_hist23:20:011
16087669910598,5cyclictest1672093-21kworker/u8:2+flush-179:022:50:151
16087669910598,5cyclictest1672093-21kworker/u8:2+flush-179:022:50:151
16087669910595,7cyclictest1672093-21kworker/u8:2+events_unbound22:40:181
16087669910587,6cyclictest1655848-21kworker/u8:0+events_unbound21:35:141
16087669910587,6cyclictest1655848-21kworker/u8:0+events_unbound21:35:131
16087669910499,4cyclictest1618257-21kworker/u8:2+flush-179:020:15:251
16087669910498,4cyclictest1662465-21kworker/u8:2+flush-179:022:05:151
16087669910498,4cyclictest1614994-21kworker/u8:1+events_unbound19:40:231
16087669910497,5cyclictest1707153-21kworker/u8:0+events_unbound00:10:251
16087669910396,5cyclictest1602648-21kworker/u8:0+flush-179:019:25:201
16087669910392,8cyclictest1629610-21latency_hist20:15:011
16087639910393,7cyclictest1615026-21latency_hist19:30:010
16087669910196,3cyclictest1662465-21kworker/u8:2+events_unbound22:00:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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