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2025-02-11 - 00:50
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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 Mon Feb 10, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
69528499117102,11cyclictest766070-21apt-get11:15:000
69528699111102,6cyclictest785692-21kworker/u8:1+flush-179:012:30:151
69528699110101,6cyclictest749128-21kworker/u8:1+events_unbound10:20:131
6952869910991,10cyclictest710066-21/usr/sbin/munin07:55:251
6952869910893,5cyclictest713799-21kworker/u8:1+events_unbound08:30:231
6952869910799,6cyclictest762616-21kworker/u8:2+events_unbound11:20:181
69528699107101,4cyclictest729980-21kworker/u8:0+flush-179:009:05:211
6952849910699,5cyclictest719422-21kworker/u8:0+flush-179:008:25:200
6952849910699,5cyclictest700018-21kworker/u8:0+events_unbound07:55:140
6952869910595,7cyclictest700018-21kworker/u8:0+events_unbound07:50:231
6952869910595,7cyclictest700018-21kworker/u8:0+events_unbound07:50:231
6952869910493,7cyclictest744340-21kworker/u8:3+events_unbound09:55:191
6952849910188,10cyclictest722818-21apt-get08:35:120
695286999993,4cyclictest774583-21kworker/u8:0+events_unbound11:55:241
695286999992,5cyclictest689390-21kworker/u8:2+events_unbound07:25:021
695284999991,5cyclictest700018-21kworker/u8:0+events_unbound07:55:010
695284999991,5cyclictest700018-21kworker/u8:0+events_unbound07:55:000
695284999891,5cyclictest767876-21kworker/u8:3+events_unbound11:30:000
695284999889,6cyclictest766017-21kworker/u8:0+events_unbound11:15:140
695286999787,7cyclictest788324-21latency_hist12:40:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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