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2026-07-24 - 13:36
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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 Jul 24, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
68252312284,19sleep20-21swapper/219:09:352
65522279250,19sleep10-21swapper/119:06:201
68412262232,20sleep30-21swapper/319:09:473
66202259229,19sleep00-21swapper/019:06:590
122142630,0sleep00-21swapper/023:35:100
68132620,0sleep00-21swapper/022:52:510
224282610,0sleep00-21swapper/023:21:290
22162570,0sleep20-21swapper/200:27:392
157012570,0sleep10-21swapper/122:39:011
163922550,0sleep20-21swapper/223:37:202
12182550,0sleep30-21swapper/321:30:593
173702530,0sleep30-21swapper/323:19:003
162192530,0sleep10-21swapper/122:19:561
34922480,0sleep20-21swapper/222:11:292
22332390,0sleep30-21swapper/322:30:193
283702210,0sleep20-21swapper/222:07:152
290372190,0sleep00-21swapper/023:45:120
19452180,0sleep10-21swapper/123:09:501
132872180,0sleep00-21swapper/019:20:210
132872180,0sleep00-21swapper/019:20:210
55122150,0sleep20-21swapper/220:15:152
170682140,0sleep10-21swapper/122:59:111
69679998,1cyclictest28-21ksoftirqd/220:40:012
69719984,2cyclictest275-21systemd-journal21:25:033
69719980,1cyclictest0-21swapper/300:35:013
69679986,1cyclictest3678-21rm23:10:182
69679983,2cyclictest275-21systemd-journal23:21:382
69629987,1cyclictest22-21ksoftirqd/100:00:011
69629986,1cyclictest24894-21sh23:42:311
69629980,5cyclictest7144-21basename21:55:001
27317280,0sleep30-21swapper/323:05:143
18224280,0sleep00-21swapper/023:58:060
10828280,0sleep228-21ksoftirqd/200:32:542
9842270,0sleep00-21swapper/020:25:140
69719973,3cyclictest275-21systemd-journal22:42:163
69719973,3cyclictest275-21systemd-journal20:58:183
69719973,3cyclictest20836-21ssh22:22:063
69719973,3cyclictest12049-21cat20:30:133
69719970,6cyclictest25278-21expr21:00:123
69679973,3cyclictest275-21systemd-journal21:05:252
69679973,3cyclictest23174-21df_inode20:55:132
69679972,3cyclictest23450-21dump-pmu-power19:45:022
69629973,3cyclictest658-21snmpd20:26:321
69629973,3cyclictest658-21snmpd19:45:321
69629973,3cyclictest275-21systemd-journal00:12:091
69629973,2cyclictest275-21systemd-journal20:20:011
69629972,3cyclictest4211-21idleruntime-cro23:50:001
69629971,3cyclictest23670-21munin-run22:05:011
69599974,2cyclictest658-21snmpd00:07:090
69599974,2cyclictest504-21dbus-daemon22:20:000
69599974,2cyclictest29145-21ssh23:05:460
69599974,2cyclictest275-21systemd-journal22:39:510
69599973,3cyclictest17881-21ntpq22:20:170
69599973,1cyclictest0-21swapper/023:17:410
32038270,0sleep30-21swapper/321:50:153
25233270,0sleep00-21swapper/000:21:430
69719966,0cyclictest0-21swapper/300:09:233
69719965,1cyclictest34-21ksoftirqd/320:20:003
69719964,2cyclictest15566-21apt-get20:40:013
69719963,2cyclictest7795-21grep19:10:153
69719963,2cyclictest7308-21expr21:35:133
69719963,2cyclictest708-21sh21:11:243
69719963,2cyclictest658-21snmpd22:55:113
69719963,2cyclictest658-21snmpd22:19:223
69719963,2cyclictest6420-21tune2fs21:15:143
69719963,2cyclictest504-21dbus-daemon19:51:323
69719963,2cyclictest32582-21/usr/sbin/munin20:05:193
69719963,2cyclictest31276-21ssh23:26:593
69719963,2cyclictest30776-21sh23:45:293
69719963,2cyclictest29807-21ssh00:25:063
69719963,2cyclictest23061-21sshd00:00:253
69719963,2cyclictest18746-21df_inode20:45:163
69719963,2cyclictest15715-21sh23:36:493
69719963,2cyclictest15044-21timerwakeupswit00:15:223
69719962,3cyclictest9921-21cat22:35:153
69719962,3cyclictest9531-21df20:25:123
69719962,3cyclictest8425-21cut21:55:163
69719962,3cyclictest658-21snmpd23:35:003
69719962,3cyclictest658-21snmpd23:20:423
69719962,3cyclictest658-21snmpd23:12:443
69719962,3cyclictest658-21snmpd22:45:503
69719962,3cyclictest658-21snmpd22:10:583
69719962,3cyclictest658-21snmpd22:05:313
69719962,3cyclictest658-21snmpd20:00:043
69719962,3cyclictest658-21snmpd19:56:043
69719962,3cyclictest658-21snmpd19:30:203
69719962,3cyclictest658-21snmpd19:20:293
69719962,3cyclictest658-21snmpd19:20:293
69719962,3cyclictest658-21snmpd00:12:453
69719962,3cyclictest27714-21grep21:05:133
69719962,3cyclictest13980-21ntpq23:55:163
69719962,3cyclictest0-21swapper/323:00:253
69719962,1cyclictest0-21swapper/321:41:423
69719961,4cyclictest4375-21turbostat20:15:003
69719961,4cyclictest0-21swapper/322:50:143
69719960,6cyclictest0-21swapper/323:40:033
69719960,6cyclictest0-21swapper/322:25:063
69719960,2cyclictest21697-21/usr/sbin/munin00:20:153
69719960,2cyclictest15328-21kworker/u8:100:35:263
69719960,0cyclictest0-21swapper/322:03:053
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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