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2026-08-01 - 18:22
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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 Sat Aug 01, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
322421110,7sleep30-21swapper/309:06:243
322421110,7sleep30-21swapper/309:06:243
205569910718,37cyclictest9276-21cpuspeed10:11:062
205569910718,37cyclictest9276-21cpuspeed10:11:062
20545991052,79cyclictest3610-21cpuspeed07:42:090
205519910255,38cyclictest9277-21sort10:11:061
205519910255,38cyclictest9277-21sort10:11:061
205459910282,15cyclictest23609-21kworker/u18:1+events_unbound10:35:480
205459910282,15cyclictest23609-21kworker/u18:1+events_unbound10:35:480
20556991012,43cyclictest26870-21timerwakeupswit07:11:252
20556991012,43cyclictest26870-21timerwakeupswit07:11:252
2055699996,47cyclictest21475-21ssh10:31:052
2055699996,47cyclictest21475-21ssh10:31:052
2055199993,27cyclictest24790-21taskset12:24:541
20545999871,15cyclictest8641-21ssh09:16:150
2055699974,32cyclictest3135-21/usr/sbin/munin10:01:222
2055699974,32cyclictest3135-21/usr/sbin/munin10:01:222
2055199972,38cyclictest24122-21munin-run07:05:491
2055199972,38cyclictest24122-21munin-run07:05:491
20556999546,12cyclictest352-21runrttasks11:58:522
2055699953,40cyclictest5034-21latency_hist07:45:522
2055699944,36cyclictest14554-21/usr/sbin/munin09:26:172
2055699943,39cyclictest5114-21fschecks_count11:51:542
2055699943,39cyclictest5114-21fschecks_count11:51:542
2055699923,39cyclictest6734-21sh07:50:492
20551999275,11cyclictest10381-21latency_hist12:00:511
2055699913,38cyclictest1079-21timerandwakeup09:56:272
201072917,69sleep20-21swapper/206:52:042
20551999065,8cyclictest30652cat10:00:541
2055199903,34cyclictest14618-21unixbench_singl08:11:261
20545999074,10cyclictest4811-21apt-get07:46:050
2055699893,38cyclictest14323-21sensors_temp12:06:242
2055699893,36cyclictest29401-21cut07:21:112
2055199894,31cyclictest22730-21tail10:32:191
2055199894,31cyclictest22730-21tail10:32:191
2054599894,48cyclictest15-21ksoftirqd/009:05:510
2054599894,46cyclictest15-21ksoftirqd/007:01:200
2054599894,46cyclictest15-21ksoftirqd/007:01:200
2054599891,47cyclictest15-21ksoftirqd/009:11:160
20551998844,36cyclictest28433-21diskmemload10:16:191
2055199883,58cyclictest5363-21runrttasks07:46:151
2055199882,34cyclictest16720-21df12:11:101
2055199882,33cyclictest10868-21tune2fs12:01:121
20545998862,19cyclictest24856-21needreboot07:06:150
20545998862,19cyclictest24856-21needreboot07:06:150
2055699876,39cyclictest1617-21/usr/sbin/munin10:51:242
2055699876,39cyclictest1617-21/usr/sbin/munin10:51:242
2055699874,36cyclictest352-21runrttasks07:07:142
2055699874,36cyclictest352-21runrttasks07:07:142
2055199873,7cyclictest0-21swapper/111:21:011
20545998769,13cyclictest20532-21cyclictest09:10:490
20545998769,13cyclictest20532-21cyclictest09:10:490
20545998761,18cyclictest16781-21latency_hist08:20:520
2055699866,30cyclictest11528-21/usr/sbin/munin09:21:152
2055699862,38cyclictest3018-21ssh11:47:502
2055199864,6cyclictest0-21swapper/107:56:051
2055199863,30cyclictest23316-21latency_hist09:40:501
2055199862,7cyclictest0-21swapper/107:06:041
2055199862,7cyclictest0-21swapper/107:06:041
20545998662,15cyclictest300-21rs:main0
20545998662,15cyclictest300-21rs:main0
2054599863,44cyclictest15-21ksoftirqd/012:06:440
20545998634,13cyclictest181rcu_preempt10:54:590
20545998634,13cyclictest181rcu_preempt10:54:590
2055199854,33cyclictest18214-21apt-get10:26:011
2055199853,8cyclictest0-21swapper/112:06:011
2055199853,33cyclictest32286-21latency_hist07:30:511
2055199853,31cyclictest3441-21ssh09:06:281
2055199853,31cyclictest3441-21ssh09:06:281
2055199853,30cyclictest27589-21latency_hist11:35:521
2054599853,48cyclictest15-21ksoftirqd/008:46:190
20556998463,14cyclictest20532-21cyclictest09:39:052
2055699843,36cyclictest21730-21grep08:35:492
2055699843,36cyclictest21730-21grep08:35:492
20551998445,25cyclictest0-21swapper/108:26:161
2055199844,42cyclictest30941-21grep10:46:181
2055199843,34cyclictest28447-21/usr/sbin/munin10:41:281
2055199843,33cyclictest16883-21acpi08:20:591
2055199843,31cyclictest26265-21latency_hist09:45:531
2055199843,30cyclictest24535-21cut11:30:521
2055199843,30cyclictest24535-21cut11:30:521
2055199842,6cyclictest0-21swapper/107:16:061
2055199842,34cyclictest3343-21/usr/sbin/munin10:01:081
2055199842,34cyclictest3343-21/usr/sbin/munin10:01:081
2055199842,34cyclictest27854-21ssh11:36:081
2055199842,34cyclictest27854-21ssh11:36:081
2055199842,33cyclictest5888-21tail11:52:101
2055199842,33cyclictest5888-21tail11:52:101
20556998363,6cyclictest181rcu_preempt11:36:102
20556998363,6cyclictest181rcu_preempt11:36:102
2055699835,37cyclictest7999-21apt-get09:16:032
2055699835,36cyclictest12285-21fschecks_count08:06:102
2055699835,36cyclictest12285-21fschecks_count08:06:102
2055199833,7cyclictest0-21swapper/108:41:061
2055199833,36cyclictest13097-21ssh11:11:111
2055199833,32cyclictest32326-21/usr/sbin/munin09:01:181
2055199833,32cyclictest30794-21ssh11:40:531
2055199833,32cyclictest30794-21ssh11:40:531
2055199833,31cyclictest8213-21apt-config09:15:511
2055199833,31cyclictest29449-21/usr/sbin/munin07:21:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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