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2026-01-07 - 16:54
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Wed Jan 07, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7799911952,16cyclictest10488-21ssh11:50:140
7799911952,16cyclictest10488-21ssh11:50:140
47721096,15sleep00-21swapper/007:07:460
7799910710,45cyclictest20501-21apt-get08:09:510
2718221040,7sleep027171-21ssh09:40:000
2718221040,7sleep027171-21ssh09:40:000
7799910279,17cyclictest7601-21kworker/u19:0+flush-179:008:24:520
35542950,7sleep30-21swapper/311:39:523
779999463,11cyclictest181rcu_preempt09:24:490
779999256,14cyclictest181rcu_preempt10:44:500
787999071,13cyclictest4324-21systemd-run12:34:371
779999063,21cyclictest17214-21sh12:01:270
779998933,11cyclictest181rcu_preempt12:07:480
317822887,54sleep231749-21apt-get07:05:072
793998669,11cyclictest1915-21rm10:44:392
79399863,49cyclictest21004-21apt-get08:09:522
793998567,11cyclictest8462-21kworker/u17:1-xprtiod09:10:002
779998553,9cyclictest181rcu_preempt12:17:390
779998546,18cyclictest181rcu_preempt10:11:360
779998456,20cyclictest17364-21latency_hist11:09:400
779998456,19cyclictest7787-21latency_hist07:29:410
79799832,61cyclictest21017-21chrt08:09:573
787998368,8cyclictest0-21swapper/110:55:081
787998359,16cyclictest21735-21/usr/sbin/munin12:10:121
779998362,15cyclictest3036-21cron11:39:360
779998236,30cyclictest6076-21kworker/u17:3+rpciod12:35:570
77999822,26cyclictest28126-21sort12:19:580
779998211,61cyclictest28416-21apt-get10:34:510
779998211,61cyclictest28416-21apt-get10:34:510
317462826,58sleep30-21swapper/307:04:483
787998166,8cyclictest0-21swapper/111:29:391
779998161,14cyclictest26764-21ssh11:24:540
779998152,20cyclictest32136-21sh09:48:030
779998146,15cyclictest181rcu_preempt07:19:380
779998143,13cyclictest181rcu_preempt08:45:500
779998143,13cyclictest181rcu_preempt08:45:500
779998137,13cyclictest32500-21rm10:40:140
77999813,34cyclictest1153-21tune2fs07:10:000
787998062,8cyclictest0-21swapper/108:09:401
779998058,15cyclictest767-21cyclictest08:20:230
779998058,15cyclictest767-21cyclictest08:20:230
779998052,20cyclictest6530-21latency_hist09:59:400
793997958,14cyclictest19047-21ssh12:05:002
787997959,14cyclictest8167-21diskmemload12:00:051
787997951,19cyclictest32293-21latency_hist08:44:411
787997951,19cyclictest32293-21latency_hist08:44:411
779997959,15cyclictest28513-21kworker/u18:1+events_unbound10:59:360
793997859,12cyclictest277-21dbus-daemon08:09:392
793997858,13cyclictest21999-21latency_hist10:24:412
793997838,30cyclictest9721-21cut07:35:012
787997863,9cyclictest5628-21latency09:00:031
787997859,13cyclictest767-21cyclictest10:10:101
78799785,63cyclictest28459-21ssh10:34:551
78799785,63cyclictest28459-21ssh10:34:551
787997856,17cyclictest31-21ksoftirqd/107:44:351
787997820,24cyclictest7262-21ssh10:00:031
779997865,8cyclictest19615-21ssh10:20:060
779997865,8cyclictest19615-21ssh10:20:060
779997856,16cyclictest21028-21fschecks_count09:29:590
77999783,41cyclictest25120-21/usr/sbin/munin10:30:110
779997828,14cyclictest181rcu_preempt11:01:370
3258527826,25sleep10-21swapper/107:05:561
793997753,15cyclictest6076-21kworker/u17:3-rpciod11:55:052
793997747,23cyclictest7524-21sshd07:29:012
793997653,12cyclictest0-21swapper/210:05:172
779997659,13cyclictest767-21cyclictest11:30:340
77999765,40cyclictest5463-21cut10:49:590
779997653,13cyclictest6789-21ssh09:59:530
77999762,33cyclictest20185-21idleruntime-cro11:14:370
77999762,33cyclictest20185-21idleruntime-cro11:14:370
793997559,10cyclictest6274-21ssh12:36:452
793997558,10cyclictest0-21swapper/211:47:272
793997555,9cyclictest0-21swapper/212:20:012
793997530,22cyclictest0-21swapper/211:01:592
787997554,16cyclictest767-21cyclictest10:07:131
787997553,15cyclictest1-21systemd07:29:011
787997552,15cyclictest9325-21runrttasks11:49:391
78799753,53cyclictest327-21apt-get08:44:521
78799753,53cyclictest327-21apt-get08:44:521
779997561,10cyclictest767-21cyclictest10:07:240
779997547,19cyclictest14239-21latency_hist07:49:410
779997537,10cyclictest0-21swapper/011:55:020
77999752,41cyclictest24700-21ssh12:14:400
793997454,12cyclictest0-21swapper/209:09:402
793997449,19cyclictest1-21systemd10:52:002
793997447,17cyclictest0-21swapper/208:24:402
793997447,17cyclictest0-21swapper/208:24:402
793997442,22cyclictest1-21systemd12:34:382
793997424,34cyclictest39-21ksoftirqd/209:52:242
779997449,9cyclictest181rcu_preempt12:24:510
779997449,9cyclictest181rcu_preempt12:24:510
779997444,11cyclictest181rcu_preempt08:35:000
77999744,34cyclictest26578-21apt09:39:370
779997413,28cyclictest9172-21modprobe11:49:360
793997353,11cyclictest0-21swapper/208:49:592
793997353,11cyclictest0-21swapper/208:49:592
793997349,18cyclictest32457-21latency_hist08:44:392
793997349,18cyclictest32457-21latency_hist08:44:392
793997348,19cyclictest27945-21apt-key10:34:382
793997348,18cyclictest23520-21cut09:34:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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