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2026-06-21 - 11:05
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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 Sun Jun 21, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
208189912343,73cyclictest17090-21systemctl22:28:390
208189912343,73cyclictest17090-21systemctl22:28:390
208189911331,13cyclictest0-21swapper/020:44:010
20818991132,38cyclictest26491-21latency_hist20:53:420
208189910836,13cyclictest0-21swapper/020:09:050
20818991074,37cyclictest27361-21unixbench_multi22:44:160
20818991074,37cyclictest27361-21unixbench_multi22:44:160
20818991073,53cyclictest12471-21ssh00:08:390
208189910734,15cyclictest0-21swapper/020:14:050
208189910734,15cyclictest0-21swapper/020:14:050
20818991073,36cyclictest5454-21/usr/sbin/munin22:08:590
208189910730,17cyclictest0-21swapper/019:04:170
208189910635,12cyclictest0-21swapper/000:20:140
208189910635,12cyclictest0-21swapper/000:20:140
208189910563,25cyclictest15-21ksoftirqd/021:54:310
20818991053,31cyclictest5821-21uniq19:49:000
20818991053,31cyclictest5821-21uniq19:49:000
20818991043,44cyclictest352-21runrttasks23:04:580
208189910128,13cyclictest0-21swapper/022:29:010
208189910034,11cyclictest0-21swapper/021:41:330
1981929811,60sleep119847-21nfs4_client18:54:141
2081899972,25cyclictest5371-21basename19:48:390
309992960,7sleep10-21swapper/123:45:081
20828999676,11cyclictest24802-21kworker/u17:2-rpciod22:54:162
20828999676,11cyclictest24802-21kworker/u17:2-rpciod22:54:162
20822999572,15cyclictest20857-21ssh23:28:491
2068229419,49sleep220706-21munin-run18:58:392
20822999271,11cyclictest0-21swapper/119:49:011
20822999271,11cyclictest0-21swapper/119:49:011
2081899922,44cyclictest22092-21if_eth020:39:030
2081899922,44cyclictest22092-21if_eth020:39:030
20828999173,12cyclictest27963-21diskmemload22:14:142
20822999170,12cyclictest0-21swapper/120:04:021
20828998970,12cyclictest0-21swapper/219:59:022
20828998969,10cyclictest0-21swapper/220:04:152
20822998870,10cyclictest2203-21ssh22:03:421
20822998870,10cyclictest2203-21ssh22:03:421
2081899883,71cyclictest7380-21fschecks_count00:00:070
2081899883,35cyclictest31363-21/usr/sbin/munin19:29:050
2081899883,35cyclictest31363-21/usr/sbin/munin19:29:050
20822998770,10cyclictest0-21swapper/119:08:431
20828998667,13cyclictest23571-21ssh23:33:402
20828998656,8cyclictest181rcu_preempt19:49:062
20828998656,8cyclictest181rcu_preempt19:49:062
20822998664,16cyclictest1850-21sh21:08:561
2081899853,55cyclictest32706-40ogrotate23:48:390
20822998470,7cyclictest0-21swapper/119:18:561
20822998470,7cyclictest0-21swapper/119:18:561
20822998457,15cyclictest181rcu_preempt22:23:561
20822998457,15cyclictest181rcu_preempt22:23:561
20818998456,20cyclictest298-21in:imuxsock23:18:390
20818998456,20cyclictest298-21in:imuxsock23:18:390
20818998438,12cyclictest0-21swapper/021:44:050
2081899842,38cyclictest24931-21apt-get19:09:040
20822998363,11cyclictest0-21swapper/120:24:001
20822998361,16cyclictest20527-21fschecks_count21:40:011
20822998357,7cyclictest181rcu_preempt00:02:371
20822998349,9cyclictest181rcu_preempt20:44:151
20818998357,18cyclictest1-21systemd22:57:460
20818998357,18cyclictest1-21systemd22:57:460
20828998267,11cyclictest20810-21cyclictest20:39:112
20828998267,11cyclictest20810-21cyclictest20:39:112
20828998266,9cyclictest0-21swapper/200:09:132
20828998266,9cyclictest0-21swapper/200:09:132
20828998265,11cyclictest17124-21kworker/u17:1-ext4-rsv-conversion00:23:432
20828998265,11cyclictest17124-21kworker/u17:1-ext4-rsv-conversion00:23:432
20828998259,9cyclictest181rcu_preempt22:31:552
20828998253,9cyclictest181rcu_preempt20:19:092
20828998253,9cyclictest181rcu_preempt20:19:092
20822998263,9cyclictest0-21swapper/122:44:021
20822998263,9cyclictest0-21swapper/122:44:021
20822998260,16cyclictest17008-21fschecks_time21:34:021
20828998151,11cyclictest181rcu_preempt23:22:282
20822998165,10cyclictest0-21swapper/123:28:391
20822998165,10cyclictest0-21swapper/123:28:391
20822998160,8cyclictest181rcu_preempt20:38:501
20822998160,8cyclictest181rcu_preempt20:38:501
20822998154,11cyclictest181rcu_preempt22:34:041
20822998154,11cyclictest181rcu_preempt22:34:041
20822998151,8cyclictest181rcu_preempt20:18:421
20822998151,8cyclictest181rcu_preempt20:18:421
20822998147,9cyclictest6082-21ssh21:14:481
20828998061,9cyclictest0-21swapper/219:08:432
20828998060,9cyclictest0-21swapper/223:34:152
20828998057,8cyclictest181rcu_preempt23:39:142
20828998056,15cyclictest6432-21ssh21:15:482
20828998054,7cyclictest181rcu_preempt19:54:102
20828998054,7cyclictest181rcu_preempt19:54:102
20822998039,8cyclictest181rcu_preempt19:23:541
201352809,39sleep00-21swapper/018:54:260
20828997964,8cyclictest0-21swapper/219:34:462
20828997956,15cyclictest16295-21ntp_kernel_err00:14:072
20828997945,7cyclictest181rcu_preempt21:54:052
20828997937,12cyclictest17125-21fschecks_time20:24:012
20822997956,10cyclictest0-21swapper/122:52:331
20822997953,10cyclictest181rcu_preempt00:11:431
20822997953,10cyclictest181rcu_preempt00:11:431
2081899792,70cyclictest7571-21kworker/u18:1+ext4-rsv-conversion19:34:150
20828997863,8cyclictest0-21swapper/219:44:022
20828997862,9cyclictest0-21swapper/223:24:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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