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2026-08-25 - 07:32
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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 Tue Aug 25, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491212164,36phc2sys0-21swapper/319:07:143
91932205171,23sleep20-21swapper/219:08:272
91052205172,22sleep10-21swapper/119:07:181
90012201168,22sleep00-21swapper/019:06:050
9606996912,9cyclictest26221-21apt-get00:25:002
139391680,1ptp4l401ktimersoftd/320:15:013
960699668,16cyclictest22458-21/usr/sbin/munin21:50:152
139391620,1ptp4l401ktimersoftd/322:20:243
931226050,3sleep30-21swapper/319:10:023
131772590,3sleep0111rcuc/019:15:220
960699587,12cyclictest0-21swapper/200:14:562
960699587,11cyclictest8346-21latency_hist22:30:002
9605995833,3cyclictest25-21ksoftirqd/121:45:301
960699579,17cyclictest13932-21cpuspeed_turbos23:55:092
960699579,11cyclictest11337-21awk23:40:242
960699577,12cyclictest15838-21sed21:35:212
960699567,15cyclictest27871-21/usr/sbin/munin20:55:112
960699566,12cyclictest21414-21latency_hist19:35:012
139391560,1ptp4l401ktimersoftd/321:18:173
110182560,5sleep1231rcuc/121:25:171
960699547,16cyclictest23863-21/usr/sbin/munin23:00:232
960699547,11cyclictest27858-21cat19:45:262
960699536,13cyclictest26221-21apt-get00:25:032
960699528,14cyclictest26793-21ssh20:50:262
9605995218,4cyclictest25-21ksoftirqd/123:44:291
960699506,14cyclictest32330-21apt-get23:20:032
960699505,8cyclictest845-21ls00:35:262
9607994943,3cyclictest22429-21latency_hist20:45:003
57898480,2rtkit-daemon0-21swapper/119:48:121
960699476,7cyclictest29925-21apt-config23:15:012
9606994717,28cyclictest1325-21kworker/2:220:15:232
960699456,8cyclictest13048-21iostat_ios21:30:192
960699456,16cyclictest3674-21apt-get20:05:132
960699448,8cyclictest15924-21diskstats20:30:162
960699446,7cyclictest17794-21meminfo19:25:252
9604994439,3cyclictest22558-21cron23:00:000
960699436,15cyclictest9685-21munin-node21:20:112
960599438,9cyclictest25-21ksoftirqd/122:25:001
960599438,7cyclictest25-21ksoftirqd/100:00:201
960599436,5cyclictest25-21ksoftirqd/100:40:001
960699427,15cyclictest13458-21df20:25:152
960699426,7cyclictest31430-21diskstats19:55:172
960699426,17cyclictest2363-21apt-get21:10:012
960699426,16cyclictest31413-21/usr/sbin/munin22:10:152
960599425,8cyclictest25-21ksoftirqd/123:00:241
9605994211,8cyclictest25-21ksoftirqd/119:15:251
960499427,7cyclictest9-21ksoftirqd/021:35:260
139391420,0ptp4l401ktimersoftd/319:20:013
134491420,1getstats0-21swapper/323:45:003
134491420,1getstats0-21swapper/322:30:013
9607994135,4cyclictest28809-21cron22:05:003
960699416,7cyclictest5854-21iostat_ios23:30:182
960599419,10cyclictest25-21ksoftirqd/120:45:011
960599415,8cyclictest25-21ksoftirqd/119:20:241
9605994136,3cyclictest25-21ksoftirqd/121:00:001
960599412,8cyclictest25-21ksoftirqd/122:05:231
9605994125,5cyclictest25-21ksoftirqd/100:10:001
960599410,5cyclictest25-21ksoftirqd/120:20:261
134491410,1getstats0-21swapper/323:05:003
960699408,7cyclictest2900-21sshd20:01:092
960699406,7cyclictest18184-21meminfo21:40:232
960599408,7cyclictest25-21ksoftirqd/122:30:261
960599405,3cyclictest121rcu_preempt22:25:271
960599404,3cyclictest121rcu_preempt19:35:221
960599404,10cyclictest25-21ksoftirqd/119:55:191
9605994036,2cyclictest25-21ksoftirqd/120:20:011
9605994035,3cyclictest25-21ksoftirqd/100:30:001
9605994034,3cyclictest25-21ksoftirqd/121:10:261
960599403,3cyclictest121rcu_preempt19:40:251
9605994011,4cyclictest25-21ksoftirqd/100:15:011
960599400,7cyclictest121rcu_preempt00:30:281
139391400,0ptp4l401ktimersoftd/321:55:273
9606993934,3cyclictest21902-21fschecks_count19:35:152
960699391,35cyclictest15723-21wc22:45:122
960599398,9cyclictest25-21ksoftirqd/120:45:241
960599398,8cyclictest25-21ksoftirqd/123:10:241
960599397,8cyclictest25-21ksoftirqd/123:05:191
960599397,8cyclictest25-21ksoftirqd/121:20:141
960599397,8cyclictest25-21ksoftirqd/100:21:411
960599397,4cyclictest25-21ksoftirqd/120:05:241
960599395,2cyclictest121rcu_preempt21:05:191
960599394,4cyclictest25-21ksoftirqd/122:50:231
960599394,3cyclictest121rcu_preempt22:10:171
960599394,2cyclictest121rcu_preempt21:40:251
960599393,8cyclictest25-21ksoftirqd/123:25:191
9605993910,4cyclictest25-21ksoftirqd/120:30:151
9604993934,3cyclictest9-21ksoftirqd/023:15:010
9604993912,5cyclictest9-21ksoftirqd/019:35:010
134491390,1getstats0-21swapper/300:20:013
9606993830,7cyclictest33-21ksoftirqd/221:17:102
960599389,7cyclictest25-21ksoftirqd/120:50:191
960599388,5cyclictest25-21ksoftirqd/123:50:191
960599387,3cyclictest25-21ksoftirqd/121:30:211
960599384,3cyclictest121rcu_preempt22:00:181
960599384,3cyclictest121rcu_preempt19:50:201
960599384,3cyclictest121rcu_preempt19:50:201
960599384,2cyclictest121rcu_preempt23:55:091
960599383,3cyclictest121rcu_preempt23:30:231
9605993833,3cyclictest25-21ksoftirqd/123:25:001
9605993833,3cyclictest25-21ksoftirqd/122:00:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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