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2026-07-07 - 23:27
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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 Jul 07, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2605821466,66sleep026089-21cut06:57:350
26129991243,88cyclictest9103-21seq07:43:191
26129991243,88cyclictest9103-21seq07:43:191
26129991163,84cyclictest28587-21chrt09:42:581
26129991163,84cyclictest28587-21chrt09:42:581
26129991128,86cyclictest8616-21apt-get10:57:501
261299910547,24cyclictest373-21lldpd12:02:331
26129991019,73cyclictest21101-21ssh12:13:051
2613199962,70cyclictest8616-21apt-get10:57:512
26129999563,12cyclictest181rcu_preempt09:48:081
26129999353,23cyclictest181rcu_preempt11:50:331
26129999352,8cyclictest181rcu_preempt12:05:421
26129999234,28cyclictest26115-21cyclictest11:56:061
26122999238,23cyclictest7402-21sh11:49:190
26131999066,17cyclictest1-21systemd09:31:052
26129999054,15cyclictest181rcu_preempt09:03:051
26129999054,15cyclictest181rcu_preempt09:03:051
26129999030,20cyclictest0-21swapper/111:39:211
26131998964,17cyclictest23852-21ssh11:22:552
26129998937,24cyclictest0-21swapper/110:18:071
26129998767,14cyclictest16332-21/usr/sbin/munin09:22:421
26129998767,14cyclictest16332-21/usr/sbin/munin09:22:421
26122998733,35cyclictest4677-21kworker/u17:0+xprtiod09:58:530
2603328712,36sleep20-21swapper/206:57:332
2613199862,57cyclictest8545-21apt-get07:42:522
2613199862,57cyclictest8545-21apt-get07:42:522
26129998664,8cyclictest181rcu_preempt10:43:061
26129998664,8cyclictest181rcu_preempt10:43:061
26129998659,11cyclictest181rcu_preempt08:43:591
26129998554,8cyclictest181rcu_preempt08:02:341
26129998550,8cyclictest181rcu_preempt08:22:531
26129998543,8cyclictest181rcu_preempt11:29:011
26129998543,8cyclictest181rcu_preempt11:29:011
26129998525,30cyclictest0-21swapper/109:38:271
26129998525,30cyclictest0-21swapper/109:38:271
26129998427,27cyclictest0-21swapper/107:06:401
26131998366,10cyclictest618-21kworker/u17:1-ext4-rsv-conversion08:57:342
26129998362,8cyclictest181rcu_preempt09:19:591
26129998355,14cyclictest181rcu_preempt07:32:491
26129998349,13cyclictest181rcu_preempt11:35:501
26129998348,8cyclictest181rcu_preempt10:01:561
26129998343,9cyclictest181rcu_preempt12:08:191
26122998336,25cyclictest15132-21kworker/u17:0+nfsiod10:13:380
2613199823,62cyclictest21016-21ssh12:12:522
26129998254,12cyclictest12449-21grep11:03:071
26129998254,12cyclictest12449-21grep11:03:071
26129998248,14cyclictest181rcu_preempt08:18:041
26129998246,8cyclictest181rcu_preempt11:43:081
26129998241,22cyclictest4677-21kworker/u17:0-writeback10:02:541
26129998241,22cyclictest4677-21kworker/u17:0-writeback10:02:541
26129998229,19cyclictest0-21swapper/110:25:001
26122998232,36cyclictest0-21swapper/008:57:350
26129998164,11cyclictest24063-21ssh12:17:491
26129998146,8cyclictest181rcu_preempt10:52:491
26129998144,19cyclictest181rcu_preempt09:34:521
26129998136,13cyclictest0-21swapper/108:02:541
26129998135,10cyclictest0-21swapper/110:38:041
26129998125,20cyclictest0-21swapper/109:29:561
26122998130,36cyclictest0-21swapper/008:28:000
26129998059,7cyclictest181rcu_preempt09:56:511
26129998059,7cyclictest181rcu_preempt09:56:511
26129998049,8cyclictest181rcu_preempt10:13:031
26129998047,8cyclictest181rcu_preempt08:12:501
26129998047,8cyclictest181rcu_preempt08:12:501
26129998044,9cyclictest181rcu_preempt10:28:251
26129998037,10cyclictest0-21swapper/108:37:341
26129998022,28cyclictest0-21swapper/110:10:011
26122998062,13cyclictest26115-21cyclictest07:39:180
26122998059,14cyclictest12232-21latency_hist07:52:340
26122998021,30cyclictest0-21swapper/011:03:280
26122998021,30cyclictest0-21swapper/011:03:280
26131997960,12cyclictest19294-21latency_hist09:27:352
2612999797,42cyclictest31-21ksoftirqd/109:15:041
26129997957,8cyclictest181rcu_preempt08:38:041
2612999794,43cyclictest31-21ksoftirqd/108:52:131
2612999794,43cyclictest31-21ksoftirqd/108:52:131
26129997919,35cyclictest0-21swapper/111:08:501
26122997963,10cyclictest28162-21latency_hist08:42:350
26122997924,40cyclictest26268-21kworker/u17:0+rpciod11:12:560
26122997924,22cyclictest0-21swapper/009:04:290
26122997924,22cyclictest0-21swapper/009:04:290
26122997921,35cyclictest0-21swapper/011:47:180
26122997921,34cyclictest0-21swapper/012:14:220
2482127911,26sleep10-21swapper/106:53:401
26131997817,24cyclictest4357-21seq11:44:112
26129997856,8cyclictest181rcu_preempt08:58:301
2612999785,41cyclictest31-21ksoftirqd/107:12:241
26129997848,8cyclictest181rcu_preempt11:21:471
26129997834,10cyclictest0-21swapper/110:48:071
26129997825,15cyclictest0-21swapper/108:31:431
26122997860,12cyclictest17460-21sshd11:58:060
26129997731,9cyclictest0-21swapper/107:23:001
26122997755,16cyclictest31730-21fschecks_count09:47:540
26122997755,15cyclictest30238-21latency_hist08:47:350
2612299773,40cyclictest24956-21modprobe09:37:300
26131997659,10cyclictest3262-21runrttasks10:48:302
26131997655,15cyclictest8380-21latency_hist10:57:342
26129997638,7cyclictest181rcu_preempt08:52:471
26129997631,16cyclictest0-21swapper/109:08:381
26129997622,24cyclictest0-21swapper/112:22:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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