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2026-04-25 - 05:50
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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 Sat Apr 25, 2026 00:45:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
110632205171,23sleep10-21swapper/119:07:461
138591204170,23phc2sys0-21swapper/319:05:433
109992203168,23sleep00-21swapper/019:06:550
110642202169,22sleep20-21swapper/219:07:472
1123528363,11sleep30-21swapper/319:10:003
1152899720,24cyclictest18743-21http20:30:000
1152899720,23cyclictest21248-21idleruntime-cro21:39:590
1152899670,25cyclictest16275-21latency_hist20:25:000
1152899668,21cyclictest26694-21cpuspeed_turbos19:40:130
1152899663,23cyclictest1862-21df_abs22:05:140
1152899661,25cyclictest0-21swapper/022:10:250
1152899661,22cyclictest3807-21/usr/sbin/munin00:20:200
1152899660,24cyclictest3863-21sed21:05:010
1152899660,24cyclictest28766-21sed20:49:590
1152899660,24cyclictest13925-21latency_hist19:15:000
1152899650,24cyclictest11282-21latency_hist20:15:000
1152899650,23cyclictest7372-21cut20:05:190
1152899650,23cyclictest25804-21sed20:40:260
1152899642,21cyclictest18662-21/usr/sbin/munin23:45:140
1152899642,21cyclictest18662-21/usr/sbin/munin23:45:140
1152899641,23cyclictest24769-21sed23:55:220
1152899640,24cyclictest31948-21df_abs19:50:130
1152899640,24cyclictest31381-21latency_hist20:55:000
1152899640,24cyclictest24929-21irqrtprio19:35:160
1152899640,23cyclictest3845-21expr23:15:120
1152899640,22cyclictest31268-21expr23:05:120
1152899640,20cyclictest0-21swapper/021:25:000
1152899630,23cyclictest30986-21latency_hist00:10:000
1152899630,23cyclictest22145-21if_enp1s021:40:160
1152899630,22cyclictest22506-21ptp4l23:50:220
1152899630,20cyclictest0-21swapper/020:55:130
1152899621,24cyclictest30145-21grep23:00:250
1152899620,23cyclictest21718-21grep20:35:130
1152899611,27cyclictest31816-21df_abs22:00:140
1152899611,23cyclictest6631-21cat23:20:140
1152899610,24cyclictest18985-21cat22:40:130
1152899600,26cyclictest0-21swapper/023:40:230
1152899600,25cyclictest4393-21expr21:05:130
1152899600,19cyclictest0-21swapper/022:35:240
289202590,3sleep30-21swapper/320:50:013
1152899591,21cyclictest22042-21if_enp1s019:30:150
1152899590,27cyclictest32217-21irqrtprio00:10:190
1152899590,24cyclictest24694-21latency22:50:180
1152899590,24cyclictest11469-21expr00:35:130
1152899590,22cyclictest1508-21cstates00:15:150
1152899590,19cyclictest0-21swapper/023:40:000
1152899590,19cyclictest0-21swapper/021:25:190
1152899570,24cyclictest9163-21df_abs00:30:140
1152899570,24cyclictest9163-21df_abs00:30:140
1152899560,23cyclictest30108-21sed19:45:200
1152899560,23cyclictest30108-21sed19:45:200
1152899560,21cyclictest10988-21unixbench_singl21:15:260
1152899551,24cyclictest1893-21ls19:55:120
134991540,5getstats1153199cyclictest20:14:413
129752540,6sleep212977-21grep19:10:232
1152899541,22cyclictest17559-21cat19:20:190
1152899541,19cyclictest0-21swapper/000:25:190
1152899540,23cyclictest19433-21cstates20:30:140
1152899540,18cyclictest50798rtkit-daemon21:45:260
151172520,1sleep30-21swapper/321:25:183
1152899521,21cyclictest26634-21hddtemp_smartct00:00:140
138491500,1ptp4l401ktimersoftd/320:21:013
138491500,1ptp4l401ktimersoftd/300:15:113
138491490,1ptp4l401ktimersoftd/322:23:213
1152899485,22cyclictest14512-21fschecks_count19:15:160
1152899480,32cyclictest10371-21mailstats22:20:220
11529994718,4cyclictest25-21ksoftirqd/119:35:011
1152899471,17cyclictest4547-21df_inode20:00:140
11529994437,4cyclictest28341-21ls23:00:001
138491430,0ptp4l401ktimersoftd/322:12:383
138491430,0ptp4l401ktimersoftd/320:00:263
138491430,0ptp4l401ktimersoftd/319:24:253
11529994338,3cyclictest25-21ksoftirqd/123:30:001
11529994237,3cyclictest25-21ksoftirqd/100:40:001
11529994237,3cyclictest25-21ksoftirqd/100:05:001
11529994137,2cyclictest25-21ksoftirqd/121:49:591
11529994135,3cyclictest25-21ksoftirqd/120:30:011
50798400,8rtkit-daemon0-21swapper/123:24:261
11531994035,3cyclictest41-21ksoftirqd/322:30:003
11531994034,3cyclictest41-21ksoftirqd/321:40:003
11529993935,2cyclictest25-21ksoftirqd/121:30:001
11529993935,2cyclictest25-21ksoftirqd/121:00:001
11529993934,3cyclictest25-21ksoftirqd/122:50:011
11529993933,3cyclictest25-21ksoftirqd/122:35:001
11529993933,3cyclictest25-21ksoftirqd/121:40:001
1152999392,3cyclictest25-21ksoftirqd/100:25:001
11531993831,4cyclictest41-21ksoftirqd/319:40:073
11530993832,4cyclictest31216-21cron20:54:592
11529993833,3cyclictest25-21ksoftirqd/122:10:011
11529993833,3cyclictest25-21ksoftirqd/100:20:001
11528993832,4cyclictest9-21ksoftirqd/022:17:100
1152899380,23cyclictest30307-21ps21:55:230
138491370,0ptp4l401ktimersoftd/323:40:123
11531993732,3cyclictest41-21ksoftirqd/321:55:003
11531993731,4cyclictest41-21ksoftirqd/322:39:043
11530993731,4cyclictest33-21ksoftirqd/223:23:352
11530993731,4cyclictest33-21ksoftirqd/223:12:402
11529993732,3cyclictest25-21ksoftirqd/121:15:011
11529993732,3cyclictest25-21ksoftirqd/120:45:001
11529993732,3cyclictest25-21ksoftirqd/119:25:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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