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2026-04-20 - 10:16
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Data to construct the above plot have been generated using the RT test utility cyclictest.

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 highest latencies:
System rackcslot3.osadl.org (updated Mon Apr 20, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89850990irq/17-ehci_hcd181ktimersoftd/119:14:021
89850800irq/17-ehci_hcd25400-1kworker/0:1H22:28:320
81800rcu_preempt32646-21ssh21:35:571
81770rcu_preempt5902-21ssh21:46:030
81760rcu_preempt27432-21awk19:26:091
81740rcu_preempt20318-21memory00:21:060
81730rcu_preempt9748-21if_eth020:26:041
81730rcu_preempt7581-21wc23:55:451
81730rcu_preempt28080-21fw_conntrack19:31:011
81730rcu_preempt27575-21/usr/sbin/munin00:36:031
81730rcu_preempt22354-21fw_conntrack23:20:590
81730rcu_preempt16754-21latency_hist20:55:441
81730rcu_preempt0-21swapper/020:41:040
81720rcu_preempt32004-21ssh23:39:550
81710rcu_preempt0-21swapper/121:56:301
81710rcu_preempt0-21swapper/019:21:090
81710rcu_preempt0-21swapper/000:41:050
81700rcu_preempt6111-21ssh22:49:390
81700rcu_preempt3176-21diskstats21:41:000
81700rcu_preempt27278-21ntp_states19:26:070
81700rcu_preempt26919-21sh21:24:190
81700rcu_preempt25896-21ssh00:31:120
81700rcu_preempt0-21swapper/119:41:071
81700rcu_preempt0-21swapper/100:18:521
81700rcu_preempt0-21swapper/000:27:490
147650690irq/28-eth0-rx-41ktimersoftd/021:19:530
81680rcu_preempt29370-21sh21:28:350
81680rcu_preempt21859-21diskmemload23:47:470
81680rcu_preempt2014-21diskmemload21:38:210
81680rcu_preempt0-21swapper/123:59:431
81680rcu_preempt0-21swapper/122:47:031
81680rcu_preempt0-21swapper/122:10:231
81670rcu_preempt5538-21apt-get20:10:561
81660rcu_preempt6578-21ssh22:50:501
81660rcu_preempt18203-21apt-get21:00:561
81660rcu_preempt13684-21awk00:06:121
81660rcu_preempt0-21swapper/022:42:120
81650rcu_preempt4973-21ntp_kernel_err20:06:061
81650rcu_preempt3778-21ps20:01:100
81650rcu_preempt13924-21cut20:41:091
81650rcu_preempt0-21swapper/121:26:201
81640rcu_preempt29053-21latency_hist19:35:440
81640rcu_preempt22333-21ssh21:16:001
81640rcu_preempt13105-21ssh23:02:071
81640rcu_preempt0-21swapper/100:45:281
81640rcu_preempt0-21swapper/019:55:560
89850630irq/17-ehci_hcd0-21swapper/023:10:140
81630rcu_preempt936-21ssh22:39:471
81630rcu_preempt8500-21if_eth120:21:040
81630rcu_preempt22427-21awk23:21:011
81630rcu_preempt0-21swapper/123:36:051
81630rcu_preempt0-21swapper/123:06:551
81630rcu_preempt0-21swapper/122:28:401
81630rcu_preempt0-21swapper/023:15:480
81630rcu_preempt0-21swapper/023:04:550
81630rcu_preempt0-21swapper/021:53:310
81620rcu_preempt22212-21sed22:16:111
81620rcu_preempt2138-21snmpd23:34:020
81620rcu_preempt0-21swapper/121:11:101
81620rcu_preempt0-21swapper/121:11:101
81620rcu_preempt0-21swapper/100:12:201
81620rcu_preempt0-21swapper/022:16:070
81620rcu_preempt0-21swapper/021:59:140
89850610irq/17-ehci_hcd0-21swapper/019:49:420
81610rcu_preempt8410-21ssh22:53:420
81610rcu_preempt28856-21ssh00:36:400
81610rcu_preempt20483-21ssh22:14:101
81610rcu_preempt19154-21cat21:01:110
81610rcu_preempt0-21swapper/120:36:001
81610rcu_preempt0-21swapper/119:36:051
81610rcu_preempt0-21swapper/020:11:060
81600rcu_preempt719-21ssh22:39:020
81600rcu_preempt3672-21ssh22:45:231
81600rcu_preempt26382-21ssh21:22:291
81600rcu_preempt25480-21ssh22:24:060
81600rcu_preempt0-21swapper/123:49:241
81600rcu_preempt0-21swapper/123:31:281
81600rcu_preempt0-21swapper/121:51:031
81600rcu_preempt0-21swapper/121:06:161
81600rcu_preempt0-21swapper/120:31:031
81600rcu_preempt0-21swapper/120:21:031
81600rcu_preempt0-21swapper/120:16:031
81600rcu_preempt0-21swapper/119:16:051
81600rcu_preempt0-21swapper/100:34:261
81600rcu_preempt0-21swapper/100:24:371
81600rcu_preempt0-21swapper/020:31:100
81590rcu_preempt4191-21ssh21:41:381
81590rcu_preempt3-21ksoftirqd/023:42:420
81590rcu_preempt26387-21sshd19:25:371
81590rcu_preempt23456-21ntp_states19:11:060
81590rcu_preempt21859-21diskmemload00:02:420
81590rcu_preempt21455-21ssh23:19:081
81590rcu_preempt14434-21egrep20:45:571
81590rcu_preempt10476-21ssh22:56:541
81590rcu_preempt0-21swapper/123:44:111
81590rcu_preempt0-21swapper/123:11:101
81590rcu_preempt0-21swapper/122:33:561
81590rcu_preempt0-21swapper/122:33:561
81590rcu_preempt0-21swapper/122:21:111
81590rcu_preempt0-21swapper/121:50:071
81590rcu_preempt0-21swapper/121:32:331
81590rcu_preempt0-21swapper/119:54:341
81590rcu_preempt0-21swapper/119:46:391
81590rcu_preempt0-21swapper/100:04:151
81590rcu_preempt0-21swapper/019:31:000
81580rcu_preempt3-21ksoftirqd/023:55:300
81580rcu_preempt24668-21ssh23:25:470
81580rcu_preempt15373-21ssh00:10:560
81580rcu_preempt15080-21ssh22:03:401
81580rcu_preempt0-21swapper/123:26:411
81580rcu_preempt0-21swapper/120:03:421
81580rcu_preempt0-21swapper/119:55:551
81580rcu_preempt0-21swapper/100:28:021
81580rcu_preempt0-21swapper/022:08:120
81580rcu_preempt0-21swapper/000:08:110
81570rcu_preempt29917-21ssh22:31:240
81570rcu_preempt29917-21ssh22:31:240
81570rcu_preempt21859-21diskmemload22:11:260
81570rcu_preempt0-21swapper/120:54:311
81570rcu_preempt0-21swapper/023:59:090
81570rcu_preempt0-21swapper/022:55:530
81570rcu_preempt0-21swapper/021:34:120
81560rcu_preempt0-21swapper/023:12:110
81560rcu_preempt0-21swapper/022:02:470
81560rcu_preempt0-21swapper/020:16:380
81550rcu_preempt0-21swapper/020:56:020
81550rcu_preempt0-21swapper/020:51:110
81550rcu_preempt0-21swapper/019:50:570
81530rcu_preempt0-21swapper/019:16:020
81530rcu_preempt0-21swapper/000:19:250
81520rcu_preempt0-21swapper/019:45:410
81510rcu_preempt0-21swapper/020:37:010
81470rcu_preempt4526-21df_inode20:06:000
81470rcu_preempt0-21swapper/020:50:210
81420rcu_preempt20984-21df_inode21:11:000
81420rcu_preempt20984-21df_inode21:11:000
26771391watchdog0-21swapper/021:06:110
81350rcu_preempt9328-21/usr/sbin/munin20:26:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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