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2025-10-24 - 15:54
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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
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Fri Oct 24, 2025 12:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15893862268189,28sleep10-21swapper/107:08:101
15892682255215,26sleep00-21swapper/007:06:530
125899580,4rtkit-daemon1257-21rtkit-daemon10:42:060
125899570,3rtkit-daemon1257-21rtkit-daemon10:27:370
17107462560,2sleep11710748-21ssh10:43:271
125899560,3rtkit-daemon0-21swapper/007:32:131
125899510,4rtkit-daemon1257-21rtkit-daemon07:15:461
125899480,24rtkit-daemon1567544-21GUsbEventThread07:13:071
125899470,4rtkit-daemon1257-21rtkit-daemon12:32:510
16471562440,2sleep11647157-21sh09:20:221
125899440,3rtkit-daemon1257-21rtkit-daemon12:29:010
17525422430,4sleep0161rcuc/011:38:570
158967199422,7cyclictest26-21ksoftirqd/109:20:001
125899420,3rtkit-daemon1257-21rtkit-daemon10:38:070
158967199419,9cyclictest26-21ksoftirqd/109:00:021
158967199409,7cyclictest26-21ksoftirqd/108:20:011
158967199402,7cyclictest26-21ksoftirqd/110:20:001
125899400,3rtkit-daemon0-21swapper/108:50:401
125899390,3rtkit-daemon0-21swapper/111:44:381
158967199380,14cyclictest26-21ksoftirqd/112:40:011
125899380,4rtkit-daemon1257-21rtkit-daemon09:50:441
125899380,3rtkit-daemon0-21swapper/109:43:241
158967199376,7cyclictest26-21ksoftirqd/110:55:161
1589671993715,7cyclictest26-21ksoftirqd/111:40:001
1589671993710,10cyclictest26-21ksoftirqd/107:25:231
125899370,3rtkit-daemon0-21swapper/111:46:151
125899370,3rtkit-daemon0-21swapper/110:08:131
125899370,3rtkit-daemon0-21swapper/109:38:291
125899370,3rtkit-daemon0-21swapper/108:40:381
158967199363,8cyclictest26-21ksoftirqd/111:30:151
158967199363,7cyclictest26-21ksoftirqd/110:05:001
1589667993629,5cyclictest1772388-21/usr/sbin/munin12:05:240
125899360,4rtkit-daemon0-21swapper/111:53:501
125899360,3rtkit-daemon0-21swapper/111:10:220
125899360,3rtkit-daemon0-21swapper/107:23:280
125899360,3rtkit-daemon0-21swapper/107:23:280
158967199354,9cyclictest26-21ksoftirqd/112:17:001
158967199354,7cyclictest26-21ksoftirqd/109:55:101
158967199351,8cyclictest26-21ksoftirqd/110:30:011
158967199351,7cyclictest26-21ksoftirqd/110:45:011
158967199351,7cyclictest26-21ksoftirqd/110:30:221
158967199350,9cyclictest26-21ksoftirqd/112:10:011
158967199350,8cyclictest26-21ksoftirqd/108:30:011
125899350,6rtkit-daemon287-20systemd-journal09:49:550
125899350,4rtkit-daemon1257-21rtkit-daemon12:35:370
158967199345,8cyclictest26-21ksoftirqd/108:20:141
158967199344,7cyclictest26-21ksoftirqd/112:30:141
158967199340,8cyclictest26-21ksoftirqd/109:30:011
158967199340,6cyclictest1738010-21unin-run11:20:011
125899340,5rtkit-daemon1717560-21ssh10:51:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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