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2026-08-03 - 17:07
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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 Mon Aug 03, 2026 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
321449910847,32cyclictest19676-21snmpd11:38:452
321449910766,34cyclictest15792-21ls09:10:432
321449910730,39cyclictest0-21swapper/211:26:132
321449910730,39cyclictest0-21swapper/211:26:132
321449910330,47cyclictest0-21swapper/207:16:422
32144991003,31cyclictest18868-21sh11:02:302
32144991003,31cyclictest18868-21sh11:02:302
3214499992,34cyclictest352-21runrttasks08:18:342
3214499992,34cyclictest352-21runrttasks08:18:342
3214499972,26cyclictest6289-21taskset08:52:152
3120629710,62sleep030631-21/usr/sbin/munin06:51:210
3120629710,62sleep030631-21/usr/sbin/munin06:51:210
32144999620,46cyclictest0-21swapper/209:25:432
3213799963,60cyclictest15-21ksoftirqd/007:50:520
3214499953,28cyclictest22081-21ssh11:08:002
32144999532,39cyclictest0-21swapper/208:50:232
32140999449,8cyclictest181rcu_preempt09:10:581
32140999449,8cyclictest181rcu_preempt09:10:581
3214499922,29cyclictest6580-21diskmemload10:58:342
32140999271,14cyclictest28995-21ssh09:31:521
32140999151,12cyclictest181rcu_preempt09:18:321
3214899909,53cyclictest0-21swapper/309:30:563
32144999063,11cyclictest181rcu_preempt10:16:112
3214499903,6cyclictest0-21swapper/209:50:512
32144999032,48cyclictest0-21swapper/207:32:252
32140999044,12cyclictest181rcu_preempt08:56:101
3214499899,34cyclictest29737-21grep12:15:432
3214499899,34cyclictest29737-21grep12:15:432
32140998962,21cyclictest1419-21latency_hist07:00:441
32144998838,43cyclictest0-21swapper/210:11:142
32144998838,43cyclictest0-21swapper/210:11:142
32144998838,41cyclictest0-21swapper/210:51:032
32144998838,41cyclictest0-21swapper/210:51:032
3214499882,34cyclictest3579-21latency_hist08:45:442
32137998826,26cyclictest15-21ksoftirqd/007:06:500
3214499874,8cyclictest0-21swapper/209:45:532
3214499874,8cyclictest0-21swapper/209:45:532
32144998742,37cyclictest0-21swapper/210:05:402
3214499872,27cyclictest352-21runrttasks10:07:212
32140998741,12cyclictest181rcu_preempt11:55:211
3214499863,6cyclictest0-21swapper/207:45:562
3214499863,30cyclictest352-21runrttasks08:02:262
3214499862,29cyclictest25685-21mailstats09:26:142
32140998663,13cyclictest0-21swapper/110:06:051
32137998658,20cyclictest23674-21fschecks_time11:11:030
3213799863,53cyclictest15-21ksoftirqd/011:50:430
3214499854,7cyclictest0-21swapper/211:20:532
3214499853,7cyclictest0-21swapper/211:50:532
3214499853,40cyclictest352-21runrttasks09:35:412
3214499853,38cyclictest583-21/usr/sbin/munin12:21:002
3214499853,30cyclictest28160-21grep08:21:002
3214499853,30cyclictest28160-21grep08:21:002
32140998560,16cyclictest17769-21kworker/u17:3-rpciod08:10:411
32140998560,16cyclictest17769-21kworker/u17:3-rpciod08:10:411
32140998557,20cyclictest27894-21latency_hist08:20:431
32140998557,20cyclictest27894-21latency_hist08:20:431
32140998532,11cyclictest181rcu_preempt11:21:171
32137998528,7cyclictest181rcu_preempt10:05:420
32137998520,41cyclictest15-21ksoftirqd/007:03:140
3214499844,7cyclictest0-21swapper/212:15:562
3214499844,7cyclictest0-21swapper/212:15:562
3214499843,35cyclictest352-21runrttasks11:10:592
3214499843,33cyclictest668-21ssh10:31:572
3214499843,28cyclictest18952-21/usr/sbin/munin11:56:182
3214499843,25cyclictest352-21runrttasks09:05:132
3214499842,6cyclictest0-21swapper/210:35:562
3214499842,39cyclictest352-21runrttasks10:21:002
32140998463,15cyclictest29410-21latency_hist08:25:421
32140998463,15cyclictest29410-21latency_hist08:25:421
32140998461,13cyclictest0-21swapper/109:45:431
32140998433,12cyclictest181rcu_preempt09:50:571
3213799844,44cyclictest15-21ksoftirqd/009:14:000
3213799844,44cyclictest15-21ksoftirqd/009:14:000
3128328418,37sleep20-21swapper/206:51:232
3128328418,37sleep20-21swapper/206:51:232
32144998365,12cyclictest6580-21diskmemload11:31:052
3214499834,71cyclictest529-21ssh09:38:172
3214499834,71cyclictest529-21ssh09:38:172
3214499833,40cyclictest12000-21apt-get11:45:522
3214499833,38cyclictest10776-21dpkg09:55:522
3214499832,32cyclictest5362-21grep07:11:042
3214499832,26cyclictest31194-21/usr/sbin/munin08:30:592
32140998361,12cyclictest0-21swapper/107:06:171
32140998360,13cyclictest0-21swapper/111:00:431
32140998356,11cyclictest181rcu_preempt11:06:181
32140998351,9cyclictest181rcu_preempt09:01:031
32140998347,12cyclictest181rcu_preempt09:30:191
32140998345,12cyclictest181rcu_preempt10:12:141
32140998345,12cyclictest181rcu_preempt10:12:141
32140998343,12cyclictest181rcu_preempt11:57:411
32140998334,16cyclictest181rcu_preempt07:29:411
32140998323,22cyclictest0-21swapper/112:21:151
32137998343,18cyclictest0-21swapper/008:21:590
32137998343,18cyclictest0-21swapper/008:21:590
32137998330,12cyclictest181rcu_preempt11:43:020
3214499825,66cyclictest0-21swapper/207:35:542
3214499825,66cyclictest0-21swapper/207:35:542
32144998240,35cyclictest0-21swapper/207:06:182
3214499822,32cyclictest26594-21awk12:10:402
32140998259,13cyclictest0-21swapper/108:05:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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