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2026-08-20 - 22:01
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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 Thu Aug 20, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2596212411,80sleep22641-21sendmail_mailtr07:05:362
34449912065,42cyclictest22303-21apt-get08:05:090
34449911132,48cyclictest5366-21ssh12:24:010
34449910630,40cyclictest0-21swapper/012:32:430
34449910630,40cyclictest0-21swapper/012:32:430
3295210613,62sleep13318-21apt07:09:551
3461991039,71cyclictest19052-21apt-get07:55:102
3461991039,71cyclictest19052-21apt-get07:55:102
34569910385,12cyclictest619-21wc08:35:281
34449910235,32cyclictest9564-21seq09:56:490
34449910138,22cyclictest14180-21ssh09:14:120
34449910138,22cyclictest14180-21ssh09:14:120
34449910128,25cyclictest351-21runrttasks11:51:180
34449910034,35cyclictest19174-21kworker/u17:2+xprtiod12:18:130
34449910033,26cyclictest30386-21taskset08:27:300
34449910033,26cyclictest30386-21taskset08:27:300
3444999937,28cyclictest19722-21seq11:04:560
3444999934,31cyclictest18339-21ssh09:20:190
3444999837,36cyclictest31963-21ssh11:23:550
3444999837,36cyclictest31963-21ssh11:23:550
3444999835,27cyclictest5547-21ssh11:33:100
3444999833,34cyclictest8495-21ssh12:28:570
3461999768,9cyclictest181rcu_preempt08:10:222
3461999768,9cyclictest181rcu_preempt08:10:222
3456999752,37cyclictest0-21swapper/112:19:561
3444999738,21cyclictest9719-21unin-run09:04:550
3444999737,34cyclictest21871-21ssh10:15:410
3444999737,29cyclictest13099-21ssh11:45:000
3444999735,27cyclictest25279-21ssh12:04:210
3444999735,22cyclictest13655-21ssh10:55:070
3444999734,26cyclictest31732-21sh12:14:420
3444999733,25cyclictest7091-21taskset09:53:360
3444999731,28cyclictest25592-21ssh09:31:020
3444999726,22cyclictest0-21swapper/010:00:180
285442970,7sleep30-21swapper/309:35:333
3461999665,17cyclictest23532-21kworker/u18:2+events_unbound09:19:562
3444999648,39cyclictest0-21swapper/011:10:070
3444999635,26cyclictest11757-21ssh11:42:470
3444999635,19cyclictest19056-21taskset07:55:070
3444999635,19cyclictest19056-21taskset07:55:070
3444999634,28cyclictest5413-21ssh10:40:550
3444999634,28cyclictest22499-21taskset11:09:040
3444999634,28cyclictest22499-21taskset11:09:040
3444999633,26cyclictest2242-21ssh11:27:480
3456999572,16cyclictest4447-21sh11:30:301
3444999567,20cyclictest28854-21apt-key08:24:580
3444999537,48cyclictest17500-21/usr/sbin/munin10:10:150
3444999537,48cyclictest17500-21/usr/sbin/munin10:10:150
3444999534,26cyclictest3264-21ssh10:38:360
3444999533,27cyclictest1521-21ssh09:45:000
3444999525,36cyclictest0-21swapper/009:38:000
3461999446,13cyclictest181rcu_preempt09:44:572
3444999472,15cyclictest287-21in:imuxsock07:29:560
3444999438,25cyclictest600-21cron10:34:540
3444999438,25cyclictest600-21cron10:34:540
3444999435,24cyclictest12068-21ssh10:51:440
3444999435,24cyclictest12068-21ssh10:51:440
3444999433,26cyclictest9373-21ssh10:47:570
3444999431,26cyclictest25954-21ssh10:22:560
3444999337,23cyclictest29073-21ssh10:27:490
3444999337,23cyclictest29073-21ssh10:27:490
3444999335,28cyclictest1036-21taskset08:36:040
3444999335,22cyclictest22603-21sh09:26:250
3444999335,22cyclictest22603-21sh09:26:250
3444999334,24cyclictest31298-21memory08:30:220
3444999334,24cyclictest20899-21ssh11:56:180
3444999334,24cyclictest20899-21ssh11:56:180
3444999333,28cyclictest4353-21taskset08:46:590
3444999332,36cyclictest30867-21kworker/u18:1+rpciod10:06:020
3444999332,27cyclictest6565-21ssh11:35:060
3444999332,26cyclictest17408-21sh09:19:230
3461999256,12cyclictest181rcu_preempt12:05:172
3444999271,11cyclictest0-21swapper/009:40:360
3444999230,21cyclictest351-21runrttasks07:30:580
3444999227,23cyclictest0-21swapper/012:05:160
252729211,43sleep00-21swapper/007:05:340
3461999141,9cyclictest181rcu_preempt08:40:522
3444999171,10cyclictest0-21swapper/007:14:580
3444999136,22cyclictest13516-21ssh12:35:370
3444999132,19cyclictest27695-21ssh11:16:110
3444999131,24cyclictest15850-21grep07:45:160
3444999129,20cyclictest0-21swapper/009:06:050
3461999057,8cyclictest181rcu_preempt07:45:262
3461999047,12cyclictest181rcu_preempt08:15:292
3461999041,17cyclictest181rcu_preempt08:35:222
3456999071,13cyclictest25454-21latency_hist08:14:571
3456999071,13cyclictest25454-21latency_hist08:14:571
3444999062,20cyclictest7307-21apt-get07:20:090
3444999035,19cyclictest13637-21taskset07:39:140
3461998965,15cyclictest17617-21cpuspeed10:10:112
3461998965,15cyclictest17617-21cpuspeed10:10:112
3461998964,11cyclictest181rcu_preempt09:20:172
3461998962,8cyclictest181rcu_preempt09:10:302
3461998962,8cyclictest181rcu_preempt09:10:302
3461998942,15cyclictest181rcu_preempt07:30:542
3444998936,23cyclictest7844-21seq08:57:290
3444998936,23cyclictest7844-21seq08:57:290
3444998935,22cyclictest26243-21netstat08:15:340
3444998934,23cyclictest15028-21seq07:41:030
3461998849,9cyclictest181rcu_preempt07:25:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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