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2026-01-02 - 21:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Fri Jan 02, 2026 12:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2583045997422,12cyclictest309-21in:imuxsock12:39:593
2583045997226,10cyclictest2597976-21systemctl12:00:003
2583036997229,39cyclictest1-21systemd07:34:591
258303699701,14cyclictest2595871-21cron11:17:001
2583045996926,12cyclictest275-21dbus-daemon11:19:593
258303699699,9cyclictest2597190-21sshd11:43:391
2583045996824,5cyclictest2583776-21latency_hist07:25:013
2583045996622,10cyclictest0-21swapper/309:15:013
258303699661,12cyclictest2588366-21sshd08:50:411
258303699652,15cyclictest2595396-21munin-run11:10:011
258303699652,12cyclictest2594596-21sshd10:54:501
258303699651,13cyclictest2599501-21sshd12:25:391
258303699641,12cyclictest2591802-21munin-run10:00:011
258303399641,3cyclictest131rcu_preempt08:25:020
258303699632,16cyclictest2599796-21munin-run12:35:011
258303699632,16cyclictest2589453-21munin-run09:15:001
258303699632,14cyclictest2583769-21munin-run07:25:021
258303699631,16cyclictest2584548-21munin-run07:40:011
258303699631,15cyclictest2598461-21sshd12:05:401
258303699631,14cyclictest2592053-21munin-run10:05:011
258303699631,14cyclictest2592053-21munin-run10:05:001
2583045996229,12cyclictest37-21ksoftirqd/309:25:003
2583045996220,12cyclictest2593585-21systemd-run10:35:013
258303699622,13cyclictest2593343-21munin-run10:30:011
258303699622,13cyclictest2584800-21munin-run07:45:021
258303699621,9cyclictest2583458-21sshd07:19:041
258303699621,15cyclictest2589993-21munin-run09:25:011
258303699621,13cyclictest2590993-21sshd09:44:411
2583045996121,8cyclictest2592468-21cat10:10:023
2583045996120,13cyclictest275-21dbus-daemon07:55:013
2583045996120,13cyclictest275-21dbus-daemon07:55:013
2583036996139,16cyclictest1-21systemd08:20:011
258303699613,6cyclictest2586071-21munin-run08:10:001
2583036996132,25cyclictest2597125-21latency_hist11:40:021
2583036996129,29cyclictest2597946-21sshd11:59:391
258303699612,16cyclictest2589742-21munin-run09:20:021
2583036996032,24cyclictest238-21systemd-journal11:54:591
258303699602,14cyclictest2588929-21munin-run09:05:001
2583036996020,36cyclictest2585287-21latency_hist07:55:031
2583036996020,36cyclictest2585287-21latency_hist07:55:021
2583033996013,39cyclictest12-21ksoftirqd/008:55:000
2583045995941,13cyclictest238-21systemd-journal08:49:593
258303699597,4cyclictest0-21swapper/109:09:401
2583036995922,32cyclictest2592461-21latency_hist10:10:021
258303699592,15cyclictest2584006-21munin-run07:30:011
258303699592,14cyclictest364-21snmpd08:03:391
2583036995921,34cyclictest2587629-21/usr/sbin/munin08:40:011
258303699592,12cyclictest2593592-21munin-run10:35:011
258303699591,14cyclictest2597432-21sshd11:45:391
258303699591,14cyclictest2597432-21sshd11:45:391
258303399595,17cyclictest238-21systemd-journal08:40:000
258303699589,4cyclictest0-21swapper/108:21:261
2583036995813,41cyclictest2594012-21cut10:40:011
258303699581,11cyclictest2588163-21/usr/sbin/munin08:50:011
258303699572,14cyclictest2598806-21latency_hist12:15:011
258303699572,12cyclictest275-21dbus-daemon10:50:011
258303699572,12cyclictest2585524-21sshd07:59:401
2583036995712,41cyclictest0-21swapper/110:11:481
258303699571,13cyclictest364-21snmpd12:16:381
258303699571,12cyclictest2596660-21sshd11:32:411
258303699567,4cyclictest0-21swapper/111:28:491
258303699563,7cyclictest2586324-21munin-run08:15:011
258303699562,8cyclictest2600020-21cron12:40:001
258303699561,16cyclictest364-21snmpd07:49:171
258303699561,16cyclictest364-21snmpd07:49:161
258303699561,12cyclictest2587088-21modprobe08:27:411
258303699561,12cyclictest2587088-21modprobe08:27:411
258303399561,4cyclictest131rcu_preempt11:50:020
258303399561,4cyclictest131rcu_preempt11:50:010
258303699552,10cyclictest2599259-21modprobe12:22:391
258303699552,10cyclictest2599259-21modprobe12:22:391
2583033995542,9cyclictest2598990-21cron12:20:000
258303699543,7cyclictest364-21snmpd12:03:311
258303699541,10cyclictest2594835-21sshd10:57:401
258303699531,12cyclictest364-21snmpd11:11:301
258303699531,12cyclictest364-21snmpd11:11:301
258303699531,12cyclictest2587878-21sshd08:44:251
2583036995310,39cyclictest0-21swapper/107:12:571
2583036995310,39cyclictest0-21swapper/107:12:561
2583033995319,31cyclictest2584509-21latency_hist07:40:010
2583045995234,14cyclictest275-21dbus-daemon07:59:593
258303699523,6cyclictest2590449-21sshd09:31:401
258303699523,6cyclictest2590449-21sshd09:31:391
258303699521,9cyclictest2590199-21modprobe09:26:401
258303699521,8cyclictest2592774-21sshd10:17:411
2583036995215,34cyclictest275-21dbus-daemon10:45:001
258303699521,13cyclictest364-21snmpd08:34:591
258303399525,3cyclictest131rcu_preempt08:10:020
2583045995120,11cyclictest37-21ksoftirqd/309:10:023
258303699514,6cyclictest2583040-21latency_hist07:10:021
258303699511,9cyclictest414-21sshd09:52:401
2583036995110,12cyclictest2588631-21sshd08:59:261
2583033995147,2cyclictest0-21swapper/011:25:020
2583033995136,11cyclictest238-21systemd-journal10:25:010
258303699501,9cyclictest2590766-21true09:40:001
2583036995011,33cyclictest309-21in:imuxsock10:25:011
2583033995043,4cyclictest16950irq/224-800000009:45:010
2583033995042,5cyclictest16950irq/224-800000008:50:000
258303399501,3cyclictest0-21swapper/012:30:010
2583045994933,10cyclictest275-21dbus-daemon09:30:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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