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2026-03-27 - 08:22
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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 rackaslot8.osadl.org (updated Fri Mar 27, 2026 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
148752318292,17sleep20-21swapper/219:08:102
148332281250,21sleep10-21swapper/119:07:371
149892263232,21sleep00-21swapper/019:09:370
149342259209,16sleep30-21swapper/319:08:563
316062610,0sleep00-21swapper/000:06:270
174792610,0sleep20-21swapper/221:16:102
154832600,0sleep00-21swapper/021:57:020
66832590,0sleep00-21swapper/000:10:510
158032590,0sleep30-21swapper/322:58:593
210952580,0sleep30-21swapper/300:00:173
238122200,0sleep20-21swapper/223:42:342
301112160,0sleep30-21swapper/321:43:463
228832160,0sleep20-21swapper/200:01:042
218392160,1sleep30-21swapper/322:43:013
227952150,0sleep20-21swapper/222:24:182
180032150,0sleep1211rcuc/122:40:191
1512899119,1cyclictest12-21ksoftirqd/000:40:000
1513299105,4cyclictest22-21ksoftirqd/100:05:001
151359998,1cyclictest28-21ksoftirqd/222:30:012
151359998,1cyclictest28-21ksoftirqd/220:20:002
151359990,6cyclictest141rcu_preempt20:55:142
29598280,1sleep10-21swapper/120:50:111
151389984,3cyclictest275-21systemd-journal22:47:333
151359983,3cyclictest275-21systemd-journal22:02:272
151329984,3cyclictest4046-21sh21:48:311
151289987,1cyclictest12-21ksoftirqd/000:00:000
151289981,6cyclictest0-21swapper/023:00:010
3136270,0sleep30-21swapper/322:31:243
18653270,0sleep20-21swapper/223:20:122
151389976,1cyclictest34-21ksoftirqd/321:15:013
151389975,1cyclictest34-21ksoftirqd/321:50:013
151389974,2cyclictest4181-21apt-get19:55:113
151389974,2cyclictest25640-21memory20:40:153
151389973,3cyclictest8128-21cat21:30:153
151389973,3cyclictest658-21snmpd19:16:313
151389973,3cyclictest4669-21grep23:50:193
151389973,3cyclictest32250-21entropy19:45:133
151389973,3cyclictest24556-21cat21:20:203
151389973,1cyclictest0-21swapper/322:13:243
151359975,1cyclictest11043-21cron23:59:552
151359974,2cyclictest30877-21sh21:25:002
151359974,2cyclictest16637-21ntpq21:35:162
151359973,3cyclictest504-21dbus-daemon21:05:062
151359973,3cyclictest275-21systemd-journal00:29:582
151359973,3cyclictest10693-21cat20:10:002
151359970,4cyclictest0-21swapper/222:54:522
151359970,4cyclictest0-21swapper/222:18:512
151359970,0cyclictest141rcu_preempt21:00:112
151329973,3cyclictest658-21snmpd21:35:491
151329973,3cyclictest275-21systemd-journal21:11:211
151329973,3cyclictest19491-21ntpq23:20:171
151329973,2cyclictest275-21systemd-journal21:56:041
151329972,4cyclictest10405-21diskmemload22:55:171
151329972,2cyclictest275-21systemd-journal21:53:581
151289973,2cyclictest275-21systemd-journal22:15:010
151289972,3cyclictest28848-21munin-run00:25:000
151289970,6cyclictest14231-21ssh23:36:350
151289970,2cyclictest275-21systemd-journal00:35:000
14369270,0sleep10-21swapper/122:19:131
151389963,2cyclictest9889-21sh23:15:023
151389963,2cyclictest8306-21seq20:04:093
151389963,2cyclictest658-21snmpd21:39:103
151389963,2cyclictest658-21snmpd20:36:273
151389963,2cyclictest658-21snmpd00:26:583
151389963,2cyclictest5341-21ssh00:30:053
151389963,2cyclictest4623-21expr00:10:123
151389963,2cyclictest32744-21ntpq20:55:163
151389963,2cyclictest31976-21hddtemp_smartct21:25:143
151389963,2cyclictest30564-21ntp_kernel_pll_19:40:163
151389963,2cyclictest2892-21open_inodes23:10:173
151389963,2cyclictest28781-21sshd20:47:113
151389963,2cyclictest275-21systemd-journal19:31:533
151389963,2cyclictest20470-21cut22:00:133
151389963,2cyclictest20383-21sh22:22:273
151389963,2cyclictest19247-21seq20:27:003
151389963,2cyclictest14576-21/usr/sbin/munin21:15:153
151389963,2cyclictest13076-21proc_pri23:55:203
151389963,2cyclictest11461-21smartctl20:10:143
151389963,1cyclictest0-21swapper/323:20:413
151389963,1cyclictest0-21swapper/321:59:163
151389962,3cyclictest658-21snmpd23:05:173
151389962,3cyclictest658-21snmpd22:35:043
151389962,3cyclictest658-21snmpd22:15:183
151389962,3cyclictest658-21snmpd21:00:063
151389962,3cyclictest658-21snmpd20:30:453
151389962,3cyclictest658-21snmpd19:35:373
151389962,3cyclictest658-21snmpd19:10:343
151389962,3cyclictest3759-21sed23:30:193
151389962,3cyclictest2566-21hostname19:50:153
151389962,3cyclictest14005-21ntp_kernel_err20:15:183
151389962,3cyclictest0-21swapper/300:20:003
151389962,1cyclictest0-21swapper/323:37:013
151389962,1cyclictest0-21swapper/322:09:363
151389962,1cyclictest0-21swapper/321:50:083
151389962,1cyclictest0-21swapper/300:35:273
151389962,1cyclictest0-21swapper/300:15:343
151389961,4cyclictest25681-21grep22:25:223
151389961,3cyclictest275-21systemd-journal23:45:473
151389961,2cyclictest31963-21ssh00:06:443
151389960,6cyclictest0-21swapper/323:26:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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