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2026-08-11 - 11:18
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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 Tue Aug 11, 2026 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211682321292,18sleep20-21swapper/219:08:152
211962277248,19sleep00-21swapper/019:08:370
210352274240,22sleep30-21swapper/319:06:463
211872272243,19sleep10-21swapper/119:08:301
280792690,0sleep00-21swapper/020:35:010
68282560,0sleep00-21swapper/000:37:190
271072560,0sleep10-21swapper/121:18:341
126702550,0sleep00-21swapper/021:48:290
201512530,0sleep10-21swapper/100:25:461
201512530,0sleep10-21swapper/100:25:461
301542190,0sleep20-21swapper/200:32:002
238242190,0sleep10-21swapper/121:35:201
59882180,0sleep10-21swapper/122:41:481
59812170,0sleep30-21swapper/323:00:483
57782150,0sleep10-21swapper/100:17:381
232282150,0sleep30-21swapper/323:50:093
106092130,0sleep20-21swapper/223:23:012
26102110,0sleep00-21swapper/021:42:160
214199998,1cyclictest34-21ksoftirqd/300:20:013
214069994,3cyclictest275-21systemd-journal21:25:380
214199980,7cyclictest16320-21/usr/sbin/munin00:05:183
214159987,1cyclictest28-21ksoftirqd/200:00:002
214159985,2cyclictest28-21ksoftirqd/223:10:002
214159980,5cyclictest30222-21ls21:40:002
19167280,0sleep10-21swapper/122:30:191
214199975,1cyclictest34-21ksoftirqd/319:45:013
214199974,2cyclictest9760-21sshd19:52:443
214199974,2cyclictest34-21ksoftirqd/319:35:013
214199973,3cyclictest30258-21sendmail-msp21:40:003
214199973,1cyclictest0-21swapper/323:15:313
214199972,4cyclictest658-21snmpd21:59:023
214199970,1cyclictest13097-21ssh00:21:473
214159975,2cyclictest658-21snmpd22:41:452
214159975,1cyclictest30296-21run-parts20:40:002
214159975,1cyclictest30296-21run-parts20:40:002
214159973,3cyclictest504-21dbus-daemon21:55:002
214159973,3cyclictest275-21systemd-journal00:17:382
214159973,1cyclictest0-21swapper/223:52:252
214159970,3cyclictest25565-21cut00:10:142
214159970,1cyclictest20305-21sh23:29:002
214119973,2cyclictest275-21systemd-journal21:45:141
214119973,1cyclictest0-21swapper/100:02:281
214119971,3cyclictest275-21systemd-journal21:40:001
214119970,4cyclictest23035-21munin-run21:55:011
214069974,2cyclictest304-21systemd-udevd19:53:360
214069974,2cyclictest275-21systemd-journal19:23:460
214069974,2cyclictest27500-21sshd21:57:040
214069974,2cyclictest12-21ksoftirqd/000:35:010
214069973,3cyclictest8237-21expr22:05:130
214069973,3cyclictest658-21snmpd20:37:440
214069973,3cyclictest658-21snmpd20:37:440
214069973,3cyclictest504-21dbus-daemon23:50:180
214069973,3cyclictest304-21systemd-udevd22:00:360
214069973,3cyclictest304-21systemd-udevd21:20:350
214069973,3cyclictest304-21systemd-udevd21:14:340
214069973,3cyclictest304-21systemd-udevd20:44:350
214069973,3cyclictest275-21systemd-journal23:24:550
214069973,3cyclictest275-21systemd-journal22:35:010
214069973,3cyclictest275-21systemd-journal19:40:010
214069973,3cyclictest19499-21seq23:47:300
214069973,3cyclictest17388-21ntpq00:05:210
214069972,1cyclictest141rcu_preempt23:40:470
214069970,6cyclictest304-21systemd-udevd22:16:360
31174260,0sleep20-21swapper/221:40:132
214199964,1cyclictest1083-21grep20:45:153
214199963,2cyclictest859-21ssh21:40:573
214199963,2cyclictest7617-21sh22:24:153
214199963,2cyclictest7187-21sh23:20:243
214199963,2cyclictest663-21runrttasks19:17:493
214199963,2cyclictest658-21snmpd23:44:173
214199963,2cyclictest658-21snmpd00:01:113
214199963,2cyclictest5358-21ssh22:03:273
214199963,2cyclictest4729-21ssh22:40:503
214199963,2cyclictest31537-21ssh23:55:033
214199963,2cyclictest29173-11brltty23:32:533
214199963,2cyclictest275-21systemd-journal22:10:463
214199963,2cyclictest26176-21df20:30:123
214199963,2cyclictest23172-21ssh00:28:033
214199963,2cyclictest23172-21ssh00:28:033
214199963,2cyclictest13876-21ssh23:05:233
214199963,2cyclictest13643-21chrt21:30:013
214199962,3cyclictest7899-21expr21:00:123
214199962,3cyclictest658-21snmpd22:35:153
214199962,3cyclictest658-21snmpd22:31:183
214199962,3cyclictest658-21snmpd22:15:473
214199962,3cyclictest658-21snmpd22:05:373
214199962,3cyclictest658-21snmpd21:13:573
214199962,3cyclictest658-21snmpd20:03:133
214199962,3cyclictest658-21snmpd19:56:093
214199962,3cyclictest658-21snmpd19:12:363
214199962,3cyclictest6367-21smartctl19:45:143
214199962,3cyclictest504-21dbus-daemon22:57:513
214199962,3cyclictest3126-21sed19:40:013
214199962,3cyclictest30894-21df23:35:133
214199962,3cyclictest21537-21cat23:10:143
214199962,3cyclictest19330-21expr20:15:153
214199962,3cyclictest11869-21ntpq22:45:193
214199962,1cyclictest0-21swapper/323:46:233
214199962,1cyclictest0-21swapper/321:29:113
214199962,1cyclictest0-21swapper/300:30:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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