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2026-05-16 - 11:01
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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 rackcslot4.osadl.org (updated Sat May 16, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13815242259186,28sleep10-21swapper/119:08:381
13814972254184,56sleep00-21swapper/019:08:210
14448982780,4sleep00-21swapper/021:27:350
15338532690,3sleep00-21swapper/023:28:540
138176999682,43cyclictest1494010-21apt-get22:35:140
138176999623,36cyclictest1398961-21apt-get19:50:140
138176999623,36cyclictest1398961-21apt-get19:50:140
138176999621,30cyclictest1436148-21grep21:15:240
15592952610,3sleep013-21ksoftirqd/000:01:530
138176999610,29cyclictest1392901-21packagekitd19:35:020
138176999591,29cyclictest1515677-21python323:05:020
138176999590,28cyclictest1557068-40systemctl00:00:010
138176999590,27cyclictest1546127-21apt-config23:45:020
15283602580,4sleep00-21swapper/023:20:230
138176999585,23cyclictest1545920-21latency_hist23:45:010
138176999582,37cyclictest1560927-21apt-get00:05:130
138176999578,25cyclictest1568111-21fschecks_count00:15:160
138176999571,26cyclictest1430894-21sh21:10:000
138176999571,26cyclictest1430894-21sh21:10:000
138176999571,26cyclictest1390532-21latency_hist19:30:010
15811962560,3sleep10-21swapper/100:32:481
138176999569,29cyclictest1567577-21systemd-run00:15:000
138176999569,23cyclictest1507220-21sh22:52:210
138176999561,37cyclictest1431146-21apt-get21:10:130
138176999561,36cyclictest1438944-21apt-get21:20:140
138176999561,34cyclictest1468514-21ssh22:00:100
138176999560,30cyclictest1582411-21apt-get00:35:150
138176999553,34cyclictest1464799-21apt-get21:55:120
138176999551,28cyclictest1519989-21apt-get23:10:120
138176999551,26cyclictest1553393-21idleruntime-cro23:55:000
138176999550,26cyclictest1578731-21apt-get00:30:110
138176999550,25cyclictest1410573-21sed20:20:010
138176999541,37cyclictest1490330-21apt-get22:30:130
1381769995413,28cyclictest1497720-21sh22:40:080
138176999541,25cyclictest1486700-21apt-get22:25:130
1381769995411,22cyclictest1485935-21sh22:23:470
138176999540,29cyclictest1426536-21apt-get21:00:040
138176999540,28cyclictest1572602-21find00:20:240
138176999540,27cyclictest1472993-21ntp_states22:05:210
138176999540,26cyclictest1406602-21sh20:10:010
179699530,4rtkit-daemon1795-21rtkit-daemon22:12:500
138176999537,33cyclictest1461837-21cat21:50:190
138176999531,36cyclictest1430864-21diskmemload21:37:280
138176999531,29cyclictest1509690-21/usr/sbin/munin22:55:220
1381769995311,31cyclictest1420626-21seq20:44:310
138176999530,31cyclictest1455923-21ssh21:42:260
138176999530,29cyclictest1513072-21ntpq23:00:200
138176999530,28cyclictest1412440-21apt-get20:25:060
138176999530,27cyclictest1576453-21grep00:25:250
179699520,4rtkit-daemon1795-21rtkit-daemon21:47:100
138176999525,26cyclictest1391579-21which19:30:220
138176999522,36cyclictest1538683-21/usr/sbin/munin23:35:260
138176999521,35cyclictest1422840-21apt-get20:50:130
138176999521,34cyclictest1523620-21apt-get23:15:110
138176999521,26cyclictest1501619-21fschecks_time22:45:170
138176999520,40cyclictest1449521-21sh21:34:170
138176999520,28cyclictest1480533-21threads22:15:240
138176999520,27cyclictest1537756-21taskset23:34:260
138176999520,27cyclictest1388603-21systemd-run19:25:000
138176999510,30cyclictest1407480-21cut20:10:190
138176999510,27cyclictest1422660-21sh20:50:000
138176999500,28cyclictest1426025-21/usr/sbin/munin20:55:240
138176999491,35cyclictest1416970-21apt-get20:35:100
138176999491,35cyclictest1411210-21irqstats20:20:180
138176999490,27cyclictest1385899-21taskset19:17:000
138176999482,33cyclictest1383234-21seq19:10:310
138176999480,36cyclictest1396522-21seq19:42:060
138176999480,28cyclictest1415314-21fschecks_time20:30:160
138176999480,27cyclictest1403309-21expr20:00:170
138176999480,27cyclictest1401297-21gltestperf19:55:180
138176999471,26cyclictest1398368-21taskset19:45:590
179699390,5rtkit-daemon1425554-21ntp_states20:55:201
179699390,3rtkit-daemon0-21swapper/119:33:451
179699380,4rtkit-daemon0-21swapper/119:28:451
179699380,2rtkit-daemon0-21swapper/120:09:411
179699370,3rtkit-daemon0-21swapper/120:10:271
179699360,3rtkit-daemon0-21swapper/120:28:431
179699360,3rtkit-daemon0-21swapper/023:13:091
15547092350,6chrt1430864-21diskmemload23:55:241
179699340,3rtkit-daemon0-21swapper/023:09:231
179699340,3rtkit-daemon0-21swapper/022:33:171
1381774993428,4cyclictest1585301-21ssh00:39:031
179699330,4rtkit-daemon1795-21rtkit-daemon22:47:161
179699330,3rtkit-daemon0-21swapper/023:33:001
179699330,3rtkit-daemon0-21swapper/022:39:361
179699330,3rtkit-daemon0-21swapper/021:10:541
179699330,3rtkit-daemon0-21swapper/021:08:521
179699330,3rtkit-daemon0-21swapper/021:08:511
179699330,3rtkit-daemon0-21swapper/021:03:051
179699330,3rtkit-daemon0-21swapper/019:56:271
179699330,3rtkit-daemon0-21swapper/000:00:081
179699320,5rtkit-daemon1523620-21apt-get23:15:101
179699320,3rtkit-daemon1795-21rtkit-daemon22:41:001
179699320,3rtkit-daemon0-21swapper/021:46:141
179699320,3rtkit-daemon0-21swapper/019:23:111
179699310,4rtkit-daemon1795-21rtkit-daemon22:57:161
179699310,3rtkit-daemon0-21swapper/023:45:531
179699310,3rtkit-daemon0-21swapper/022:07:031
179699310,3rtkit-daemon0-21swapper/020:00:151
179699300,3rtkit-daemon0-21swapper/023:50:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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