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2025-12-17 - 15:13
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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 Wed Dec 17, 2025 12:45:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1254999520,59cyclictest0-21swapper/109:30:111
1254998815,58cyclictest0-21swapper/109:10:141
1254998713,61cyclictest0-21swapper/107:25:141
1246998626,35cyclictest1607-21apt-get08:40:100
1254998418,52cyclictest0-21swapper/111:35:151
1254998315,53cyclictest0-21swapper/108:55:161
1254998313,56cyclictest0-21swapper/109:55:131
125499827,63cyclictest21327-21apt-get09:35:121
125499827,62cyclictest30416-21apt-get10:00:241
125499826,61cyclictest17576-21apt-get10:55:131
125499826,61cyclictest17576-21apt-get10:55:131
1254998218,51cyclictest0-21swapper/111:50:121
1254998216,55cyclictest0-21swapper/108:05:241
1254998216,52cyclictest0-21swapper/109:05:161
1254998215,55cyclictest0-21swapper/107:50:131
1254998117,53cyclictest0-21swapper/109:50:121
1254998116,51cyclictest0-21swapper/111:00:131
1254998115,54cyclictest0-21swapper/111:05:131
1254998115,54cyclictest0-21swapper/110:05:231
1254998114,54cyclictest0-21swapper/112:05:231
1254998113,58cyclictest0-21swapper/111:30:131
1254998113,57cyclictest0-21swapper/110:35:121
125499808,56cyclictest11786-21apt-get12:10:111
125499807,59cyclictest17845-21apt-get09:25:131
1254998017,48cyclictest0-21swapper/111:55:121
1254998015,54cyclictest0-21swapper/110:20:131
1254998014,56cyclictest0-21swapper/111:45:131
1254998014,56cyclictest0-21swapper/110:10:141
1254998014,52cyclictest0-21swapper/108:00:131
1254998013,53cyclictest0-21swapper/110:40:141
125499797,60cyclictest32401-21apt-get08:35:131
125499797,59cyclictest14614-21apt-get07:45:131
125499796,63cyclictest26367-21apt-get11:20:141
125499796,62cyclictest5645-21apt-get07:20:131
1254997915,53cyclictest0-21swapper/107:15:251
1254997915,50cyclictest0-21swapper/112:25:141
1254997914,53cyclictest0-21swapper/112:15:101
1254997913,52cyclictest0-21swapper/108:25:141
68027820,50sleep00-21swapper/007:06:040
1254997817,51cyclictest0-21swapper/109:45:131
1254997815,50cyclictest0-21swapper/108:20:141
1254997815,50cyclictest0-21swapper/108:20:131
1254997815,49cyclictest0-21swapper/112:20:201
1254997814,52cyclictest0-21swapper/112:30:131
1254997814,52cyclictest0-21swapper/111:40:111
1254997812,53cyclictest0-21swapper/107:35:141
1246997828,43cyclictest14366-21cstates10:45:170
125499777,57cyclictest5572-21apt-get08:50:121
125499776,61cyclictest16107-21apt-get09:20:131
125499776,58cyclictest18091-21apt-get07:55:131
1254997716,48cyclictest0-21swapper/110:30:151
1254997715,49cyclictest0-21swapper/111:25:121
1254997714,54cyclictest0-21swapper/108:40:231
1254997714,52cyclictest0-21swapper/108:10:111
1254997713,55cyclictest0-21swapper/112:00:131
1254997712,55cyclictest0-21swapper/107:40:141
1254997712,55cyclictest0-21swapper/107:40:141
125499767,53cyclictest7058-21apt-get10:25:111
125499766,59cyclictest24603-21apt-get11:15:141
125499766,55cyclictest14095-21apt-get10:45:141
1254997615,52cyclictest0-21swapper/109:00:131
1254997614,53cyclictest0-21swapper/109:15:111
1254997613,49cyclictest0-21swapper/110:50:131
1254997612,49cyclictest0-21swapper/108:30:141
1254997610,55cyclictest9178-21runrttasks07:30:111
1246997649,21cyclictest14329-21seq09:15:060
1246997636,34cyclictest25875-21timerwakeupswit09:45:330
1246997632,38cyclictest17882-21chrt07:54:420
125499757,57cyclictest3839-21apt-get08:45:121
1254997512,50cyclictest0-21swapper/109:40:101
1246997531,38cyclictest4932-21taskset10:17:580
1246997531,37cyclictest7939-21memory07:25:250
1246997429,39cyclictest12738-21timerandwakeup12:10:320
125499737,52cyclictest25421-21apt-get08:15:141
125499733,60cyclictest3559-21/usr/sbin/munin10:15:121
1254997314,49cyclictest0-21swapper/107:10:221
1246997334,13cyclictest18396-21unixbench_multi12:25:350
1246997327,40cyclictest8144-21cpu12:00:160
1246997228,37cyclictest20317-21ntp_states09:30:290
125499717,49cyclictest21113-21apt-get12:35:221
125499716,49cyclictest22860-21apt-get11:10:141
1246997031,33cyclictest250-21systemd-journal08:13:200
1246997029,35cyclictest7642-21df08:55:200
1246997028,36cyclictest24377-21chrt09:41:350
1246996943,18cyclictest19338-21apt-get11:00:140
1246996935,29cyclictest16831-21ntp_states09:20:290
1246996926,37cyclictest2067-21ntp_states07:10:380
1246996914,43cyclictest0-21swapper/011:24:590
95326832,21sleep10-21swapper/107:08:571
1246996835,28cyclictest29512-21missed_timers08:25:260
1246996732,29cyclictest11281-21irqstats09:05:240
1246996730,30cyclictest14283-21latency_hist09:15:010
1246996726,35cyclictest7192-21sed11:55:350
1246996725,35cyclictest29753-21sort11:30:010
1246996630,31cyclictest14231-21ntpq12:15:260
1246996630,30cyclictest2300-21taskset11:42:290
1246996630,17cyclictest30496-21aten2.4-expect10:00:250
1246996627,20cyclictest26866-21cpuspeed_turbos09:50:170
1246996625,35cyclictest32449-21munin-node10:05:110
1246996535,24cyclictest12073-21awk07:35:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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