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2026-03-21 - 02:47
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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 Fri Mar 20, 2026 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491222180,34phc2sys0-21swapper/307:05:063
311492197164,22sleep10-21swapper/107:08:111
311632196163,22sleep20-21swapper/207:08:122
310682194161,22sleep00-21swapper/007:07:220
1430121580,6sleep23164199cyclictest07:23:082
2126721540,6sleep33164299cyclictest07:50:123
265652780,5sleep326475-21multi.sh07:24:123
17052720,5sleep21718-21od07:25:102
17052720,5sleep21718-21od07:25:102
93132680,3sleep09254-21sh07:25:200
93132680,3sleep09254-21sh07:25:200
3163999660,1cyclictest0-21swapper/011:05:130
77772650,6sleep23164199cyclictest07:19:592
162032630,4sleep116120-21sh07:25:301
162032630,4sleep116120-21sh07:25:291
174672620,11sleep017440-21multi.sh07:23:570
12082620,4sleep11204-21sort07:21:221
139391600,0ptp4l401ktimersoftd/311:25:173
3164199593,11cyclictest19782-21ptp4l-jitter10:00:242
304782590,5sleep230481-21needreboot09:15:192
3164199564,11cyclictest21721-21sed10:05:212
139391560,0ptp4l401ktimersoftd/312:02:483
182702550,5sleep018277-21spawn07:16:400
3164199542,12cyclictest15690-21missed_timers08:45:202
302522540,2sleep130259-21spawn07:17:091
105902540,1sleep30-21swapper/310:50:153
3164199534,16cyclictest13651-21systemctl08:40:232
3164199532,11cyclictest1557-21sed09:25:002
3164199532,10cyclictest6297-21latency10:40:172
3164199525,16cyclictest15501-21latency_hist12:10:012
3164199522,16cyclictest26690-21cat08:00:212
3164199522,10cyclictest30676-21sed10:25:132
3164199515,11cyclictest7988-21awk11:50:282
51112500,2sleep10-21swapper/109:30:191
3164199502,12cyclictest23135-21cat12:25:132
150502500,4sleep30-21swapper/309:50:223
3164199492,11cyclictest28108-21cstates12:35:142
3164199485,15cyclictest24623-21/usr/sbin/munin09:05:252
3164199485,15cyclictest24623-21/usr/sbin/munin09:05:252
3164199483,7cyclictest20550-21apt-get12:20:102
3164199482,16cyclictest19927-21mailstats07:45:242
3164199482,11cyclictest27352-21df_abs09:10:152
3164199481,13cyclictest1930-21ls08:15:252
3164199472,11cyclictest16937-21latency_hist11:05:012
3164199463,14cyclictest16239-21perl12:10:152
3164199462,14cyclictest30597-21ssh11:30:262
3164199452,7cyclictest19666-21apt-get08:55:122
3164199452,17cyclictest24435-21ps10:10:222
3164199441,13cyclictest11152-21ls10:50:212
31640994437,5cyclictest27621-21turbostat.cron12:35:001
3164199432,7cyclictest11975-21sshd08:39:252
3164199431,10cyclictest0-21swapper/210:45:412
139391430,0ptp4l401ktimersoftd/310:25:203
139391430,0ptp4l401ktimersoftd/308:19:303
3164199422,4cyclictest0-21swapper/209:25:222
3164199421,13cyclictest1300-21snmpd11:37:562
3164199420,14cyclictest22986-21ls11:15:222
31639994236,3cyclictest29498-21grep11:30:170
3164099418,8cyclictest25-21ksoftirqd/109:45:001
3164099416,3cyclictest25-21ksoftirqd/108:44:591
31640994137,3cyclictest25-21ksoftirqd/108:25:011
31640994137,2cyclictest25-21ksoftirqd/109:40:001
31640994135,3cyclictest25-21ksoftirqd/111:50:001
3164199402,8cyclictest25030-21apt-get12:30:022
31640994035,3cyclictest25-21ksoftirqd/109:15:001
31640994034,3cyclictest25-21ksoftirqd/112:20:011
3164099402,9cyclictest25-21ksoftirqd/107:10:181
3164099398,4cyclictest25-21ksoftirqd/108:45:121
31642993832,3cyclictest41-21ksoftirqd/307:17:173
31640993827,3cyclictest25-21ksoftirqd/110:35:001
3164099377,8cyclictest25-21ksoftirqd/109:00:001
3164099374,3cyclictest25-21ksoftirqd/107:35:151
3164099374,2cyclictest121rcu_preempt10:25:191
31640993733,2cyclictest25-21ksoftirqd/108:35:001
31640993732,3cyclictest25-21ksoftirqd/112:25:131
31640993732,3cyclictest25-21ksoftirqd/110:40:011
31640993732,3cyclictest25-21ksoftirqd/110:00:001
31640993732,3cyclictest25-21ksoftirqd/108:10:001
31640993731,4cyclictest25-21ksoftirqd/111:02:011
31640993731,4cyclictest25-21ksoftirqd/110:49:421
31640993730,4cyclictest25-21ksoftirqd/107:45:091
3164199366,4cyclictest33-21ksoftirqd/208:50:012
3164099366,4cyclictest25-21ksoftirqd/107:55:271
3164099363,5cyclictest25-21ksoftirqd/107:30:161
31640993632,3cyclictest25-21ksoftirqd/109:20:011
31640993632,2cyclictest25-21ksoftirqd/108:15:011
31640993631,3cyclictest25-21ksoftirqd/112:35:181
31640993631,3cyclictest25-21ksoftirqd/111:40:001
31640993631,3cyclictest25-21ksoftirqd/110:40:221
31640993631,3cyclictest25-21ksoftirqd/107:50:091
31640993630,4cyclictest25-21ksoftirqd/112:07:481
31640993630,4cyclictest25-21ksoftirqd/111:55:041
31640993630,4cyclictest25-21ksoftirqd/111:14:131
31640993630,3cyclictest25-21ksoftirqd/108:00:121
3164099361,5cyclictest25-21ksoftirqd/111:25:181
31642993530,3cyclictest41-21ksoftirqd/308:25:113
31642993529,4cyclictest41-21ksoftirqd/311:34:443
31642993529,4cyclictest41-21ksoftirqd/309:08:143
31642993529,4cyclictest41-21ksoftirqd/309:08:143
3164199357,4cyclictest33-21ksoftirqd/212:18:462
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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