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2026-03-16 - 16:34
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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 rackdslot3.osadl.org (updated Mon Mar 16, 2026 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491229163,22phc2sys0-21swapper/307:06:193
92752206173,22sleep10-21swapper/107:07:251
92182206141,22sleep00-21swapper/007:06:380
94162205171,23sleep20-21swapper/207:09:142
1696221630,6sleep1977999cyclictest08:30:191
2749421420,6sleep2978099cyclictest07:45:192
2006221400,5sleep0977899cyclictest10:50:270
948627055,7sleep00-21swapper/007:10:000
70082610,6sleep0101ktimersoftd/011:30:260
977999555,18cyclictest5240-21sed10:20:261
238492530,3sleep223850-21latency_hist09:55:012
284832520,1sleep30-21swapper/312:15:263
9779995044,3cyclictest32687-21dump-pmu-power11:20:001
977999492,9cyclictest26901-21ssh08:50:251
977999491,45cyclictest0-21swapper/107:50:241
978099481,45cyclictest0-21swapper/208:10:242
977999483,9cyclictest4099-21/usr/sbin/munin12:35:141
977999483,8cyclictest15214-21df_inode11:50:141
977999482,9cyclictest887-21cat12:25:251
977999472,16cyclictest14450-21cut08:25:191
9780994640,3cyclictest13304-21idleruntime-cro08:25:012
977999453,8cyclictest4020-21python09:10:241
977999453,8cyclictest4020-21python09:10:241
977999453,7cyclictest18305-21mailstats07:25:241
9780994432,10cyclictest33-21ksoftirqd/212:00:152
977999443,7cyclictest22530-21users10:55:261
977999441,7cyclictest26344-21apt-get10:00:111
977999441,7cyclictest24605-21ls08:45:271
139391440,0ptp4l401ktimersoftd/307:48:153
9780994329,10cyclictest33-21ksoftirqd/209:15:252
977999434,8cyclictest9429-21iostat_ios08:15:171
977999433,8cyclictest23093-21irqstats12:05:181
977999432,8cyclictest30125-21python10:05:241
977999432,8cyclictest29108-21sendmail_mailqu08:55:231
978099423,3cyclictest121rcu_preempt09:10:132
978099423,3cyclictest121rcu_preempt09:10:132
977999423,8cyclictest8213-21hddtemp_smartct11:35:161
977999423,8cyclictest19198-21irqstats08:35:171
977999423,7cyclictest5610-21iostat09:15:171
977999423,7cyclictest19647-21fschecks_count09:45:161
977999422,8cyclictest30798-21iostat09:00:171
977999422,8cyclictest21420-21apt-get07:35:021
977999422,7cyclictest17459-21mailstats10:45:241
977999422,14cyclictest18424-21apt-get10:50:131
139391420,0ptp4l401ktimersoftd/308:30:543
978099417,5cyclictest33-21ksoftirqd/209:45:002
978099417,5cyclictest33-21ksoftirqd/209:45:002
9780994136,3cyclictest32287-21cron09:05:002
9780994112,6cyclictest33-21ksoftirqd/212:10:002
977999413,8cyclictest5978-21iostat11:30:171
977999413,7cyclictest908-21diskstats11:20:141
977999411,15cyclictest25638-21ls12:10:221
139391410,0ptp4l401ktimersoftd/308:50:133
9780994035,3cyclictest33-21ksoftirqd/211:20:002
9780994035,3cyclictest33-21ksoftirqd/208:10:012
9780994029,8cyclictest33-21ksoftirqd/212:10:242
9780994028,9cyclictest33-21ksoftirqd/209:45:242
977999404,7cyclictest13095-21irqstats07:15:181
977999402,7cyclictest3617-21iostat11:25:191
977999402,7cyclictest15886-21sshd09:35:241
977999402,7cyclictest12599-21python08:20:241
977999401,7cyclictest16857-21apt-get09:40:121
977999401,7cyclictest16857-21apt-get09:40:121
139391400,1ptp4l401ktimersoftd/311:34:543
9780993934,3cyclictest33-21ksoftirqd/211:40:002
9780993934,3cyclictest33-21ksoftirqd/210:25:002
9780993934,3cyclictest33-21ksoftirqd/209:10:012
9780993934,3cyclictest33-21ksoftirqd/207:20:002
977999391,7cyclictest15215-21irqrtprio07:20:181
9781993832,3cyclictest41-21ksoftirqd/309:20:013
9781993831,4cyclictest41-21ksoftirqd/310:29:123
9780993833,3cyclictest33-21ksoftirqd/208:50:002
9780993833,3cyclictest33-21ksoftirqd/208:15:022
9780993833,2cyclictest33-21ksoftirqd/212:20:002
9780993832,4cyclictest33-21ksoftirqd/210:40:002
9780993832,3cyclictest33-21ksoftirqd/211:20:132
9780993828,9cyclictest33-21ksoftirqd/207:10:202
9780993811,3cyclictest33-21ksoftirqd/207:20:222
9780993810,3cyclictest33-21ksoftirqd/212:30:202
977999383,13cyclictest11273-21open_inodes11:40:231
9781993730,4cyclictest41-21ksoftirqd/311:55:043
9780993733,2cyclictest33-21ksoftirqd/210:20:002
9780993732,3cyclictest33-21ksoftirqd/210:45:002
9780993732,3cyclictest33-21ksoftirqd/209:20:262
9780993732,3cyclictest33-21ksoftirqd/207:35:002
9780993727,4cyclictest33-21ksoftirqd/210:34:362
9780993726,8cyclictest33-21ksoftirqd/212:35:152
9779993730,4cyclictest25-21ksoftirqd/110:13:291
9779993730,4cyclictest25-21ksoftirqd/110:13:291
977999372,7cyclictest24460-21hddtemp_smartct09:55:161
977999372,15cyclictest20475-21open_inodes07:30:201
977999371,7cyclictest11382-21hddtemp_smartct10:35:151
977999370,7cyclictest21682-21ls08:40:201
977999370,35cyclictest0-21swapper/107:40:251
9778993729,4cyclictest9-21ksoftirqd/009:45:120
9781993631,3cyclictest41-21ksoftirqd/311:15:093
9781993631,3cyclictest41-21ksoftirqd/308:20:003
9781993630,4cyclictest41-21ksoftirqd/308:00:293
9781993630,4cyclictest41-21ksoftirqd/307:52:353
9780993631,3cyclictest33-21ksoftirqd/211:45:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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