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2026-09-22 - 09:56
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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 Tue Sep 22, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25531212112,70sleep024596-21/usr/sbin/munin19:04:300
26096991192,27cyclictest22920-21proc_pri21:44:160
26096991192,27cyclictest22920-21proc_pri21:44:160
896921100,10sleep08954-21apt-get23:08:550
260969911052,9cyclictest4595-21kworker/u17:1+rpciod22:44:190
260969911052,9cyclictest4595-21kworker/u17:1+rpciod22:44:190
26096991098,33cyclictest29996-21apt-get23:43:580
260969910810,79cyclictest18693-21sh23:24:450
261139910668,9cyclictest181rcu_preempt22:14:102
2612099963,74cyclictest19361-21chrt00:19:153
26096999660,13cyclictest26525-21kworker/u17:1+xprtiod23:50:110
26096999638,17cyclictest16679-21ssh23:20:550
2496729420,40sleep10-21swapper/119:04:141
26113999269,16cyclictest5503-21latency_hist19:43:472
26096999260,23cyclictest6935-21gpgv19:48:480
26113999175,10cyclictest16020-21unixbench_multi23:19:202
2609699896,29cyclictest18663-21apt-get00:19:020
26096998959,22cyclictest30057-21kworker/u18:1-events_unbound19:13:480
26096998761,17cyclictest777-21diskmemload21:24:190
26104998673,8cyclictest0-21swapper/123:58:441
26113998546,16cyclictest8457-21ssh21:19:512
26113998539,11cyclictest0-21swapper/221:52:212
26104998567,12cyclictest365-21lldpd23:29:061
26104998567,12cyclictest365-21lldpd23:29:061
26096998554,22cyclictest3203-21fschecks_time22:59:040
26113998458,7cyclictest181rcu_preempt20:44:012
26113998453,7cyclictest181rcu_preempt22:09:092
26096998466,12cyclictest26082-21cyclictest22:34:200
26113998342,13cyclictest25419-21ssh00:29:062
26113998333,33cyclictest39-21ksoftirqd/220:28:442
26096998356,18cyclictest326-21systemd-logind19:58:450
26113998267,9cyclictest9376-21kernelversion23:09:082
26113998246,13cyclictest181rcu_preempt23:40:502
26113998242,11cyclictest0-21swapper/223:47:212
2611399822,45cyclictest23348-21users21:44:222
2611399822,45cyclictest23348-21users21:44:222
2609699822,59cyclictest17244-21apt-get22:29:000
2609699822,59cyclictest17244-21apt-get22:29:000
26113998158,8cyclictest181rcu_preempt22:48:432
26113998158,8cyclictest181rcu_preempt22:48:432
26113998157,10cyclictest181rcu_preempt22:39:162
26113998153,11cyclictest181rcu_preempt21:59:122
26113998145,8cyclictest0-21swapper/220:29:012
26104998165,10cyclictest1326-21processes19:29:171
26104998164,11cyclictest359-21snmpd20:38:461
26104998164,11cyclictest359-21snmpd20:38:461
26104998160,15cyclictest17672-21open_inodes20:19:151
2609699812,42cyclictest18941-21cat00:18:460
2609699812,42cyclictest18941-21cat00:18:460
26113998059,15cyclictest200-21systemd-journal19:58:462
26113998057,8cyclictest181rcu_preempt20:38:352
26113998057,8cyclictest181rcu_preempt20:38:352
26113998055,8cyclictest181rcu_preempt23:28:492
26113998055,8cyclictest181rcu_preempt23:28:492
26113998053,11cyclictest29281-21ssh22:48:512
26113998039,12cyclictest7023-21/usr/sbin/munin23:59:222
26113998038,8cyclictest0-21swapper/223:24:422
26113998032,12cyclictest181rcu_preempt00:38:452
26113998032,12cyclictest181rcu_preempt00:38:452
26104998060,14cyclictest28381-21sh00:34:031
26104998060,14cyclictest28381-21sh00:34:031
2609699806,63cyclictest19210-21/usr/sbin/munin21:39:110
26096998040,22cyclictest14626-21ssh21:30:140
2515228012,39sleep30-21swapper/319:04:203
26113997958,8cyclictest181rcu_preempt22:19:192
26113997945,12cyclictest181rcu_preempt21:39:202
26104997958,14cyclictest8821-21sh23:08:471
26104997958,14cyclictest8821-21sh23:08:471
2610499793,44cyclictest31-21ksoftirqd/123:09:411
26096997960,13cyclictest15-21ksoftirqd/020:43:460
26113997856,16cyclictest26082-21cyclictest20:03:192
26113997856,16cyclictest26082-21cyclictest20:03:192
26113997853,11cyclictest181rcu_preempt19:14:172
26113997849,10cyclictest181rcu_preempt00:14:202
26113997849,10cyclictest181rcu_preempt00:14:202
26113997834,14cyclictest0-21swapper/220:07:372
26113997831,12cyclictest181rcu_preempt21:38:152
26113997831,12cyclictest181rcu_preempt21:38:152
26113997828,17cyclictest0-21swapper/219:34:012
26104997857,15cyclictest662-21cron19:18:441
2609699781,35cyclictest2624-21sendmail-msp22:58:430
2609699781,35cyclictest2624-21sendmail-msp22:58:430
26113997744,8cyclictest181rcu_preempt23:54:542
26113997742,10cyclictest181rcu_preempt21:15:202
2611399772,65cyclictest19237-21apt-get00:19:032
26113997711,26cyclictest39-21ksoftirqd/219:24:212
26113997711,26cyclictest39-21ksoftirqd/219:24:212
26104997742,26cyclictest26492-21kworker/u18:1+nfsiod23:02:071
26104997738,29cyclictest26042-21kworker/u18:1+nfsiod23:45:151
2610499773,38cyclictest31-21ksoftirqd/122:57:371
2610499773,38cyclictest31-21ksoftirqd/122:57:371
26096997753,14cyclictest28273-21diskmemload21:53:540
26096997753,14cyclictest28273-21diskmemload21:53:540
2609699774,35cyclictest343-21runrttasks21:19:460
2609699772,38cyclictest13014-21sort00:08:550
26113997654,8cyclictest181rcu_preempt23:18:462
26113997654,8cyclictest181rcu_preempt23:18:462
26113997653,9cyclictest181rcu_preempt23:51:112
26113997653,9cyclictest181rcu_preempt21:04:002
26113997650,10cyclictest181rcu_preempt21:30:332
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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