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2026-07-21 - 11:46
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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 100 highest latencies:
System rackdslot4.osadl.org (updated Tue Jul 21, 2026 00:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303152206171,23sleep10-21swapper/119:08:461
301872204172,21sleep20-21swapper/219:07:062
301402204169,23sleep30-21swapper/319:06:343
301692203169,23sleep00-21swapper/019:06:560
3070699641,19cyclictest23803-21/usr/sbin/munin22:10:132
3070699630,21cyclictest30780-21/usr/sbin/munin19:10:122
3070699630,19cyclictest26481-21df_abs00:25:142
3070699621,22cyclictest672-21gdbus00:00:012
3070699610,21cyclictest4842-21date20:25:212
3070699610,21cyclictest22263-21date00:15:212
3070699610,21cyclictest10554-21awk21:40:292
3070699600,28cyclictest1894-21/usr/sbin/munin20:20:182
3070699590,22cyclictest14144-21expr21:50:142
3070699550,19cyclictest12383-21cat19:35:272
3070699540,21cyclictest2323-21mailstats19:15:262
3070699531,22cyclictest23359-21taskset22:08:102
3070699501,20cyclictest18145-21users21:55:292
50798490,37rtkit-daemon0-21swapper/019:10:010
3070699481,23cyclictest5555-21taskset23:41:102
3070699480,18cyclictest12953-21runrttasks22:50:302
30707994727,17cyclictest41-21ksoftirqd/322:25:003
30707994711,4cyclictest41-21ksoftirqd/320:00:013
3070699470,28cyclictest643-21taskset22:26:312
3070699460,24cyclictest28050-21taskset23:23:512
3070699460,19cyclictest1319-21snmpd22:57:442
134991460,1getstats0-21swapper/321:50:003
3070699450,28cyclictest20670-21taskset00:12:522
138491450,0ptp4l401ktimersoftd/323:42:043
3070799441,40cyclictest25782-21cron00:25:013
3070499441,40cyclictest15592-21cron19:44:590
138491440,0ptp4l401ktimersoftd/320:55:173
138491440,0ptp4l401ktimersoftd/320:09:263
30707994319,3cyclictest41-21ksoftirqd/300:00:233
3070699420,19cyclictest0-21swapper/223:50:282
3070699420,19cyclictest0-21swapper/219:45:272
138491420,0ptp4l401ktimersoftd/322:39:023
30707994127,12cyclictest41-21ksoftirqd/323:05:013
30707994123,16cyclictest41-21ksoftirqd/319:45:163
30707994110,4cyclictest41-21ksoftirqd/319:20:263
30707994027,11cyclictest41-21ksoftirqd/320:40:013
138491400,0ptp4l401ktimersoftd/321:59:553
3070799398,3cyclictest41-21ksoftirqd/321:10:133
30707993935,3cyclictest41-21ksoftirqd/323:40:003
30707993934,3cyclictest41-21ksoftirqd/321:25:003
30707993934,3cyclictest41-21ksoftirqd/321:25:003
30707993933,3cyclictest8469-21sh21:40:003
3070699391,26cyclictest1303-21runrttasks22:41:382
3070599390,37cyclictest0-21swapper/123:35:331
3070799386,4cyclictest41-21ksoftirqd/320:40:133
3070799386,29cyclictest26692-21cut22:15:153
3070799385,3cyclictest41-21ksoftirqd/320:50:143
30707993834,3cyclictest41-21ksoftirqd/321:55:003
30707993833,3cyclictest41-21ksoftirqd/319:35:273
30707993833,3cyclictest41-21ksoftirqd/300:25:143
30707993832,3cyclictest41-21ksoftirqd/321:05:223
3070799382,5cyclictest41-21ksoftirqd/322:40:213
30707993811,4cyclictest41-21ksoftirqd/320:45:253
30707993811,4cyclictest41-21ksoftirqd/319:25:213
30706993832,3cyclictest7984-21cron19:30:002
3070699380,16cyclictest1319-21snmpd00:30:032
3070599380,37cyclictest0-21swapper/123:40:331
30704993830,4cyclictest9-21ksoftirqd/023:30:120
3070799377,3cyclictest41-21ksoftirqd/300:35:183
3070799377,3cyclictest41-21ksoftirqd/300:10:163
3070799375,3cyclictest41-21ksoftirqd/322:30:013
3070799375,3cyclictest121rcu_preempt00:15:143
3070799373,3cyclictest41-21ksoftirqd/320:20:173
30707993731,4cyclictest41-21ksoftirqd/323:05:143
30707993731,4cyclictest41-21ksoftirqd/320:27:383
3070799372,8cyclictest41-21ksoftirqd/323:30:233
30707993727,4cyclictest41-21ksoftirqd/323:58:593
3070699371,20cyclictest16514-21/usr/sbin/munin23:00:162
3070699370,20cyclictest0-21swapper/221:01:242
30705993731,3cyclictest223-21systemd-journal23:01:081
30704993731,4cyclictest9-21ksoftirqd/022:33:560
3070799368,3cyclictest41-21ksoftirqd/321:15:193
3070799367,2cyclictest41-21ksoftirqd/322:00:133
3070799366,3cyclictest41-21ksoftirqd/300:30:143
3070799366,2cyclictest41-21ksoftirqd/319:50:223
3070799364,3cyclictest41-21ksoftirqd/323:45:153
3070799364,3cyclictest41-21ksoftirqd/322:10:163
30707993632,2cyclictest41-21ksoftirqd/300:09:593
30707993631,3cyclictest41-21ksoftirqd/323:50:153
30707993631,3cyclictest41-21ksoftirqd/323:15:003
30707993631,3cyclictest41-21ksoftirqd/322:55:003
30707993631,3cyclictest41-21ksoftirqd/322:50:003
30707993631,3cyclictest41-21ksoftirqd/322:30:183
30707993631,3cyclictest41-21ksoftirqd/320:00:133
30707993631,3cyclictest41-21ksoftirqd/319:30:133
30707993630,4cyclictest41-21ksoftirqd/323:29:073
30707993630,3cyclictest41-21ksoftirqd/321:00:133
3070799362,5cyclictest41-21ksoftirqd/321:30:273
3070799361,3cyclictest41-21ksoftirqd/319:10:133
3070699365,29cyclictest0-21swapper/220:40:242
30706993632,3cyclictest33-21ksoftirqd/219:33:152
30706993630,4cyclictest33-21ksoftirqd/223:48:322
30706993629,4cyclictest15744-21cron00:05:012
3070699360,21cyclictest3851-21/usr/sbin/munin21:30:132
3070699360,18cyclictest0-21swapper/219:50:262
3070599368,27cyclictest0-21swapper/121:26:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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