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2025-12-02 - 21:56
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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 Dec 02, 2025 12:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
311312206172,22sleep10-21swapper/107:06:381
137191206172,22phc2sys0-21swapper/307:05:343
311892203169,23sleep20-21swapper/207:07:232
312222202167,23sleep00-21swapper/007:07:490
313952163125,13sleep20-21swapper/207:10:002
1776621380,6sleep33169099cyclictest07:45:273
3168799658,17cyclictest0-21swapper/009:10:180
31687996514,10cyclictest27865-21ls08:10:010
31687996513,9cyclictest14070-21fschecks_count07:40:150
31687996510,11cyclictest3652-21fschecks_count10:40:170
31687996510,11cyclictest22075-21apt-config09:05:000
31687996510,11cyclictest22075-21apt-config09:05:000
31687996414,9cyclictest18307-21date07:50:000
31687996414,8cyclictest9007-21latency_hist12:00:000
31687996410,11cyclictest1073-21sort11:40:280
3168799639,16cyclictest0-21swapper/009:40:170
3168799638,9cyclictest0-21swapper/007:40:010
31687996312,10cyclictest11611-21ls08:40:270
31687996215,9cyclictest4247-21ls09:34:590
31687996214,9cyclictest29517-21sed10:25:240
31687996213,9cyclictest2626-21cut07:15:180
31687996213,9cyclictest19599-21apt-key09:00:010
31687996213,9cyclictest11675-21cpuspeed_turbos09:50:140
31687996213,11cyclictest23669-21grep08:00:150
31687996211,9cyclictest3022-21sendmail-msp10:40:000
31687996211,16cyclictest32038-21df_abs07:10:130
31687996210,11cyclictest27948-21/usr/sbin/munin08:10:270
133582620,5sleep013361-21irqrtprio08:45:210
31687996111,17cyclictest25834-21sed10:20:000
31687996111,10cyclictest5078-21sed08:30:000
31687996013,9cyclictest32164-21mailstats10:30:240
3168799599,15cyclictest0-21swapper/010:50:170
31687995910,11cyclictest15473-21timerwakeupswit09:55:260
3168799588,16cyclictest0-21swapper/011:00:260
3168799579,16cyclictest18438-21sh12:20:010
31687995711,10cyclictest16214-21sed12:14:590
31687995710,11cyclictest18209-21irqrtprio11:10:210
31687995612,7cyclictest445-21irqstats09:25:180
31687995611,10cyclictest4710-21cat11:50:150
3168799558,17cyclictest0-21swapper/011:25:160
3168799558,16cyclictest0-21swapper/010:05:130
3168799558,16cyclictest0-21swapper/010:05:130
3168799558,16cyclictest0-21swapper/007:25:210
31687995511,16cyclictest1996-21/usr/sbin/munin11:45:170
31687995511,15cyclictest9289-21cpuspeed_turbos09:45:140
31687995511,15cyclictest4585-21cstates09:35:150
136991550,1ptp4l401ktimersoftd/310:47:153
3168799548,16cyclictest0-21swapper/012:00:150
3168799548,16cyclictest0-21swapper/007:50:190
31687995412,8cyclictest22902-21diskstats11:20:150
31687995412,8cyclictest21074-21df_abs07:55:200
31687995315,9cyclictest16694-21diskstats12:15:150
31687995313,9cyclictest27702-21tune2fs11:30:160
136991530,1ptp4l401ktimersoftd/311:21:033
31687995213,6cyclictest20572-21hddtemp_smartct11:15:170
31687995212,7cyclictest7793-21df08:35:150
31687995112,7cyclictest32085-21users08:15:260
31687995112,7cyclictest21584-21hddtemp_smartct12:25:180
31687995112,6cyclictest5986-21diskstats10:45:160
31687995110,10cyclictest22754-21expr09:05:140
31687995012,7cyclictest21410-21diskstats10:10:150
31687995011,11cyclictest30292-21irqrtprio09:20:170
31687994911,7cyclictest10630-21df10:55:160
31687994812,17cyclictest9104-21cat07:30:160
31687994811,6cyclictest6161-21memory08:30:200
31687994811,6cyclictest15498-21diskstats11:05:160
31687994810,7cyclictest27567-21ssh10:20:280
3168899472,43cyclictest18103-21sshd12:15:591
3168999452,40cyclictest15778-21cron07:45:002
3168899440,42cyclictest19274-21sshd11:10:531
136991440,0ptp4l401ktimersoftd/312:12:063
31687994310,7cyclictest26376-21hddtemp_smartct12:35:190
31688994238,3cyclictest25-21ksoftirqd/112:00:011
136991420,0ptp4l401ktimersoftd/311:15:153
136991420,0ptp4l401ktimersoftd/308:54:433
31688994137,3cyclictest25-21ksoftirqd/110:39:591
3168799419,15cyclictest4138-21/usr/sbin/munin07:20:280
3168799419,15cyclictest4138-21/usr/sbin/munin07:20:270
136991410,1ptp4l401ktimersoftd/312:02:193
3169099407,3cyclictest121rcu_preempt08:30:173
31688994035,3cyclictest25-21ksoftirqd/111:30:011
31688994034,3cyclictest25-21ksoftirqd/110:04:591
31688994034,3cyclictest25-21ksoftirqd/108:25:001
136991400,1ptp4l401ktimersoftd/311:43:423
136991400,0ptp4l401ktimersoftd/307:25:273
59298390,4rtkit-daemon6774-21apt-get09:40:132
31690993934,3cyclictest41-21ksoftirqd/309:40:003
31688993935,3cyclictest25-21ksoftirqd/108:55:001
31688993934,3cyclictest25-21ksoftirqd/111:05:011
31688993934,3cyclictest25-21ksoftirqd/109:54:591
31688993933,3cyclictest25-21ksoftirqd/110:10:001
31688993933,3cyclictest25-21ksoftirqd/110:09:591
3168799398,15cyclictest18467-21runrttasks10:05:000
59298380,5rtkit-daemon31756-21cron11:40:002
31690993832,3cyclictest41-21ksoftirqd/309:25:013
31689993833,3cyclictest33-21ksoftirqd/212:33:102
31688993834,2cyclictest25-21ksoftirqd/112:15:001
31688993833,3cyclictest25-21ksoftirqd/109:59:591
31688993833,3cyclictest25-21ksoftirqd/109:40:001
31688993832,3cyclictest25-21ksoftirqd/107:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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