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2026-05-20 - 12:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot5s.osadl.org (updated Wed May 20, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9341994834,11cyclictest121ktimers/020:05:130
9346994739,5cyclictest26927-21munin-run20:00:011
9346994634,9cyclictest231ktimers/122:30:121
9341994633,10cyclictest121ktimers/022:20:120
9346994438,4cyclictest30177-21kworker/u8:3+events_unbound20:50:471
9355994336,4cyclictest33984-21sendmail20:20:003
9350994336,4cyclictest58067-21grep21:30:002
9350994332,7cyclictest311ktimers/222:40:122
9341994235,4cyclictest75330-21sendmail22:19:590
9341994232,6cyclictest0-21swapper/019:35:000
9355994132,5cyclictest115198-21idleruntime-cro00:14:593
9355994132,5cyclictest115198-21idleruntime-cro00:14:593
9346994132,4cyclictest0-21swapper/123:20:001
9346994131,5cyclictest0-21swapper/100:16:221
9355993931,4cyclictest116915-21sendmail00:20:003
9355993829,6cyclictest85304-21unixbench_multi22:45:253
9355993827,7cyclictest0-21swapper/320:00:003
9350993832,4cyclictest30177-21kworker/u8:3+events_unbound20:30:432
9350993831,4cyclictest20105-21cron19:40:002
9350993831,3cyclictest0-21swapper/221:10:012
9346993832,4cyclictest33726-21kworker/u8:0+events_unbound20:45:471
9346993831,4cyclictest52741-21munin-plugin-st21:15:001
9346993828,7cyclictest35676-21sh20:25:011
9341993825,9cyclictest121ktimers/021:15:140
9341993825,9cyclictest121ktimers/021:15:140
9355993730,4cyclictest84067-21auditctl22:45:013
9355993725,8cyclictest18394-21sh19:35:003
9346993728,4cyclictest0-21swapper/121:50:251
9346993724,5cyclictest131rcu_preempt00:39:301
9341993716,9cyclictest11-21ksoftirqd/019:20:100
9346993629,4cyclictest21815-21sh19:45:001
9346993627,4cyclictest0-21swapper/100:30:001
9346993624,7cyclictest0-21swapper/120:40:001
9346993617,5cyclictest131rcu_preempt22:10:011
9346993617,5cyclictest131rcu_preempt22:10:011
9341993628,4cyclictest0-21swapper/000:36:260
9341993626,6cyclictest106005-21grep23:45:310
9350993527,4cyclictest0-21swapper/222:40:002
9350993525,6cyclictest0-21swapper/223:40:012
9346993525,6cyclictest0-21swapper/123:30:311
9346993523,3cyclictest131rcu_preempt23:50:211
9346993518,4cyclictest131rcu_preempt22:59:181
9346993517,8cyclictest62833-21ls21:40:251
9346993513,5cyclictest131rcu_preempt19:20:181
9341993526,6cyclictest71453-21unixbench_multi22:05:270
9341993526,6cyclictest71453-21unixbench_multi22:05:260
9355993427,4cyclictest47610-21sendmail21:00:003
9355993426,4cyclictest0-21swapper/319:20:153
935099343,5cyclictest131rcu_preempt21:30:132
9350993422,8cyclictest204-21dbus-daemon21:50:582
935099341,4cyclictest131rcu_preempt21:10:132
9346993422,5cyclictest131rcu_preempt23:05:201
9341993428,3cyclictest0-21swapper/019:50:000
9341993427,3cyclictest68494-21kthreadd22:00:010
9341993424,6cyclictest0-21swapper/023:55:010
9350993327,4cyclictest18407-21idleruntime-cro19:35:002
9350993327,4cyclictest13120-21kworker/u8:1+events_unbound19:29:412
9350993326,4cyclictest0-21swapper/219:10:282
9350993326,3cyclictest0-21swapper/223:19:592
9350993324,6cyclictest208-21systemd-logind22:51:102
9350993321,9cyclictest90897-21cron23:04:592
9350993321,9cyclictest90897-21cron23:04:592
934699337,9cyclictest24-21ksoftirqd/119:15:021
9346993327,4cyclictest68204-21kworker/u8:1+events_unbound22:02:421
9346993325,4cyclictest13280-21kthreadd19:20:011
9346993320,5cyclictest131rcu_preempt21:20:081
9346993315,10cyclictest131rcu_preempt22:22:091
9346993314,4cyclictest131rcu_preempt00:08:191
9346993313,6cyclictest131rcu_preempt00:30:221
9341993326,4cyclictest11130-21wc19:15:020
9355993224,4cyclictest0-21swapper/323:30:203
9355993224,4cyclictest0-21swapper/319:15:023
9355993223,6cyclictest0-21swapper/323:55:013
9355993222,6cyclictest71451-21grep22:05:263
9355993222,6cyclictest71451-21grep22:05:263
9355993222,6cyclictest0-21swapper/319:35:263
9355993215,12cyclictest0-21swapper/319:45:253
9350993216,11cyclictest311ktimers/223:05:112
934699325,16cyclictest24-21ksoftirqd/120:00:251
9346993224,4cyclictest0-21swapper/123:45:311
9346993221,8cyclictest231ktimers/120:30:181
9346993220,7cyclictest36910-21grep20:25:251
9346993218,5cyclictest131rcu_preempt19:30:211
9346993218,4cyclictest131rcu_preempt22:18:051
9346993217,4cyclictest131rcu_preempt21:30:141
934199324,3cyclictest131rcu_preempt22:00:120
9341993226,3cyclictest0-21swapper/021:25:120
9341993221,7cyclictest21351-21grep19:40:250
9341993218,10cyclictest26947-21basename20:00:000
9355993122,4cyclictest0-21swapper/322:21:043
9355993121,6cyclictest0-21swapper/322:30:253
9355993121,6cyclictest0-21swapper/321:30:003
9355993120,7cyclictest0-21swapper/321:20:263
9355993120,6cyclictest0-21swapper/322:35:263
935099314,4cyclictest131rcu_preempt23:55:102
9350993125,4cyclictest30177-21kworker/u8:3+events_unbound20:35:442
9350993123,6cyclictest71779-21kworker/u8:2+events_unbound22:31:072
9350993123,4cyclictest0-21swapper/219:50:362
9346993123,4cyclictest0-21swapper/121:25:241
9346993123,4cyclictest0-21swapper/121:20:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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