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2025-11-21 - 18:30
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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 rackbslot7.osadl.org (updated Fri Nov 21, 2025 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2435321018,58sleep124438-21unixbench_multi07:05:131
2490821009,63sleep024910-21munin-run07:09:280
25010999760,12cyclictest181rcu_preempt10:54:532
2500299963,74cyclictest28359-21ssh09:59:481
25002999480,10cyclictest24980-21cyclictest11:40:001
25010998961,8cyclictest181rcu_preempt08:52:052
24990998957,23cyclictest21636-21threads08:35:000
25002998873,10cyclictest25756-21ssh10:52:341
25002998869,11cyclictest32372-21kworker/u19:3-ext4-rsv-conversion08:19:441
25010998756,10cyclictest181rcu_preempt09:28:322
25002998726,26cyclictest1878-21sh09:12:431
2500299872,59cyclictest16840-21ssh09:40:031
25002998724,26cyclictest0-21swapper/110:15:021
25002998722,31cyclictest355-21runrttasks11:52:221
24990998659,19cyclictest16128-21sh09:39:250
241722867,54sleep224217-21sensors_temp07:05:102
25010998556,21cyclictest24980-21cyclictest11:04:472
25002998557,20cyclictest28195-21latency_hist09:59:291
25002998557,20cyclictest28195-21latency_hist09:59:291
25010998448,8cyclictest181rcu_preempt09:54:522
25010998448,8cyclictest181rcu_preempt09:54:522
25002998464,14cyclictest31190-21kernelversion12:00:141
24990998454,11cyclictest181rcu_preempt09:58:510
24990998454,11cyclictest181rcu_preempt09:58:510
24990998412,53cyclictest7045-21kworker/u19:1+ext4-rsv-conversion09:59:430
25010998364,12cyclictest26202-21kworker/u17:2-rpciod12:12:342
25010998354,8cyclictest181rcu_preempt09:09:282
25002998360,16cyclictest25831-21cstates08:49:421
25002998325,23cyclictest0-21swapper/110:22:151
2499099836,61cyclictest30821-21kworker/u19:0+ext4-rsv-conversion09:04:450
25002998260,15cyclictest347-21lldpd11:22:151
2500299823,65cyclictest30844-21cpu09:04:451
25002998225,26cyclictest28468-21taskset07:18:251
25002998225,26cyclictest28468-21taskset07:18:251
24990998248,11cyclictest181rcu_preempt12:00:030
24990998246,26cyclictest0-21swapper/011:49:270
24990998246,11cyclictest181rcu_preempt10:39:380
24990998241,10cyclictest181rcu_preempt07:14:440
24990998241,10cyclictest181rcu_preempt07:14:440
2499099823,33cyclictest4714-21fschecks_time07:44:450
25010998157,9cyclictest181rcu_preempt10:49:442
25002998127,25cyclictest0-21swapper/109:22:451
24990998152,22cyclictest2577-21latency_hist09:14:270
25010998055,7cyclictest181rcu_preempt11:01:592
25010998055,7cyclictest181rcu_preempt11:01:592
25010998039,17cyclictest181rcu_preempt10:09:282
25010998025,12cyclictest0-21swapper/211:49:402
25002998024,24cyclictest355-21runrttasks09:19:021
25002998024,24cyclictest355-21runrttasks09:19:021
25002998024,21cyclictest0-21swapper/111:55:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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