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2026-03-19 - 18:12
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6.osadl.org (updated Thu Mar 19, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20896999970,18cyclictest26-21ksoftirqd/110:30:111
20896999867,17cyclictest26-21ksoftirqd/109:55:111
20896999667,16cyclictest26-21ksoftirqd/107:45:251
20896999564,17cyclictest26-21ksoftirqd/108:00:131
2089199957,16cyclictest0-21swapper/009:40:120
2051529522,27sleep00-21swapper/007:08:040
2051529522,27sleep00-21swapper/007:08:030
20896999265,18cyclictest26-21ksoftirqd/108:25:131
20896999265,16cyclictest26-21ksoftirqd/109:20:131
20896999263,19cyclictest26-21ksoftirqd/108:10:141
20896999161,16cyclictest26-21ksoftirqd/111:45:101
2089199916,68cyclictest0-21swapper/010:00:260
2054329128,18sleep10-21swapper/107:08:241
2054329128,18sleep10-21swapper/107:08:241
2089199898,11cyclictest0-21swapper/012:35:120
20896998863,16cyclictest26-21ksoftirqd/112:00:141
20896998762,13cyclictest26-21ksoftirqd/112:30:121
20896998755,19cyclictest26-21ksoftirqd/107:50:101
2089199876,65cyclictest0-21swapper/007:30:130
20896998554,19cyclictest26-21ksoftirqd/107:25:151
20896998554,19cyclictest26-21ksoftirqd/107:25:141
20896998352,19cyclictest26-21ksoftirqd/110:05:131
20896998228,24cyclictest13509-21apt-get09:50:161
20896998031,21cyclictest6423-21runrttasks07:55:361
20896998030,20cyclictest548-21runrttasks09:00:211
20896998030,19cyclictest17897-21runrttasks08:30:191
20896998027,26cyclictest11480-21taskset09:45:151
20896998026,46cyclictest448-21dbus-daemon11:35:001
20896997947,21cyclictest26-21ksoftirqd/108:50:101
20896997931,40cyclictest15350-21diskstats11:25:221
20896997929,20cyclictest20957-21sendmail-msp08:40:001
20896997926,27cyclictest32352-21wc10:40:331
20896997922,49cyclictest4518-21diskstats10:55:211
20896997830,19cyclictest500-21snmpd12:35:231
20896997828,25cyclictest548-21runrttasks09:05:151
20896997824,31cyclictest27082-21cron12:00:011
2089199789,21cyclictest0-21swapper/011:05:220
20896997751,13cyclictest2437-21apt-get10:50:131
20896997746,20cyclictest26-21ksoftirqd/112:05:111
20896997728,24cyclictest500-21snmpd09:25:381
20896997728,19cyclictest548-21runrttasks11:10:111
20896997728,19cyclictest500-21snmpd11:54:421
20896997725,23cyclictest448-21dbus-daemon07:19:591
20896997724,27cyclictest5996-21aten2.4-expect11:00:151
20896997724,22cyclictest32384-21turbostat12:14:591
20896997629,18cyclictest250-21systemd-journal10:15:271
20896997628,19cyclictest850-21runrttasks12:15:291
20896997627,25cyclictest22859-21runrttasks08:45:131
20896997627,25cyclictest22859-21runrttasks08:45:131
20896997627,21cyclictest22695-21awk08:44:591
20896997627,20cyclictest17320-21runrttasks10:00:161
20896997627,19cyclictest548-21runrttasks08:05:141
20896997626,22cyclictest2976-21sed12:20:341
20896997625,26cyclictest31953-21df09:10:181
20896997624,26cyclictest9024-21grep11:05:451
20896997624,19cyclictest0-21swapper/109:15:291
20896997622,29cyclictest30307-21taskset10:35:301
20896997615,32cyclictest0-21swapper/107:36:331
2089199769,16cyclictest0-21swapper/007:40:100
20896997527,21cyclictest548-21runrttasks07:40:111
20896997525,26cyclictest30077-21sh07:35:011
20896997525,25cyclictest12575-21tr08:15:161
20896997525,20cyclictest0-21swapper/107:10:221
20896997524,27cyclictest548-21runrttasks11:20:011
20896997524,26cyclictest21875-21grep10:10:331
20896997524,20cyclictest0-21swapper/111:20:291
20896997524,19cyclictest24979-21apt-get07:20:111
2089199757,52cyclictest0-21swapper/008:55:130
20896997427,20cyclictest7742-21cron09:34:591
20896997424,20cyclictest0-21swapper/108:20:231
20896997423,23cyclictest8621-21ntpq09:35:271
20896997423,21cyclictest0-21swapper/111:35:271
2089199747,19cyclictest0-21swapper/012:30:090
2089199746,52cyclictest0-21swapper/009:05:130
20896997327,19cyclictest548-21runrttasks11:42:191
20896997323,20cyclictest0-21swapper/112:25:231
20896997323,20cyclictest0-21swapper/109:40:311
20896997322,27cyclictest25048-21awk10:20:281
20896997321,27cyclictest27046-21awk08:55:311
20891997310,47cyclictest0-21swapper/012:05:110
20896997222,19cyclictest0-21swapper/110:45:291
20896997122,19cyclictest0-21swapper/110:25:421
2089199718,47cyclictest0-21swapper/010:45:130
2089199716,16cyclictest0-21swapper/007:15:120
20891997029,28cyclictest0-21swapper/011:55:120
20891997028,20cyclictest14-21ksoftirqd/011:35:150
20891996916,40cyclictest14-21ksoftirqd/009:35:100
20891996845,9cyclictest14-21ksoftirqd/011:10:390
20891996814,42cyclictest14-21ksoftirqd/010:24:270
261222670,4sleep0171rcuc/007:20:360
20891996530,14cyclictest14-21ksoftirqd/011:00:140
20891996529,13cyclictest14-21ksoftirqd/012:15:140
20891996528,13cyclictest14-21ksoftirqd/011:15:170
2089199648,16cyclictest0-21swapper/007:10:130
2089199637,42cyclictest0-21swapper/007:55:140
20891996330,28cyclictest14-21ksoftirqd/008:24:080
20891996328,23cyclictest14-21ksoftirqd/008:45:200
20891996328,23cyclictest14-21ksoftirqd/008:45:190
20891996314,17cyclictest14833-21munin-run11:25:010
2089199626,11cyclictest0-21swapper/009:50:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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