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2026-05-20 - 14:59

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot4s.osadl.org (updated Wed May 20, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2550160994139,1cyclictest2773805-21fwupd22:44:053
2550156994137,3cyclictest2815366-21gpgv23:25:002
2550156994130,9cyclictest2639235-21/usr/sbin/munin20:35:192
2550160993832,4cyclictest2670340-21diskstats21:05:143
2550156993833,3cyclictest2586403-21kworker/u8:2+flush-259:019:55:152
2550154993731,4cyclictest335557-21systemd-journal20:47:571
2550160993629,5cyclictest2731011-21ntpq22:00:233
2550154993632,3cyclictest2618581-21kworker/u8:2+flush-259:020:25:171
2550156993529,4cyclictest2591992-21cp19:50:012
2550156993529,4cyclictest2591992-21cp19:50:012
2550154993530,3cyclictest2711440-21kworker/u8:4+flush-259:021:50:001
2550150993431,2cyclictest2649175-21kworker/u8:0+flush-259:021:51:030
2550150993430,3cyclictest335557-21systemd-journal20:18:570
2550154993327,4cyclictest2737657-21cp22:10:011
2550154993126,4cyclictest2613198-21kworker/u8:1+flush-259:020:45:011
2550154993126,3cyclictest2597437-21base6419:55:011
2550150993125,4cyclictest2825163-21ntpq23:30:200
2550156993025,4cyclictest2835474-21ntpq23:40:212
2550156993023,5cyclictest2591636-21cat19:50:002
2550156993016,8cyclictest2893253-21idleruntime-cro00:40:012
2550150993025,4cyclictest2597024-21cp19:55:000
2550150993025,4cyclictest2597024-21cp19:54:590
2550156992925,3cyclictest2565566-21kworker/u8:3+flush-259:021:30:012
2550154992923,4cyclictest2695696-21latency_hist21:30:011
2550156992821,5cyclictest2575874-21latency_hist19:35:012
2550154992825,2cyclictest2846343-21kworker/u8:1+flush-259:023:55:141
2550150992825,2cyclictest2862247-21kworker/u8:0+flush-259:000:15:180
2550160992724,2cyclictest2763211-21kworker/u8:1+events_unbound22:55:163
2550150992721,4cyclictest2847071-21diskstats23:55:110
2550160992620,4cyclictest2841493-21latency_hist23:50:013
2550160992620,4cyclictest2706055-21latency_hist21:40:003
2550160992619,5cyclictest335557-21systemd-journal22:55:003
2550150992621,4cyclictest2618581-21kworker/u8:2+flush-259:020:20:240
2550150992620,4cyclictest335557-21systemd-journal19:44:570
2550160992522,2cyclictest2862247-21kworker/u8:0+flush-259:000:15:013
2550160992521,3cyclictest2596942-21http19:55:003
2550160992521,3cyclictest2596942-21http19:55:003
255015699256,17cyclictest2618355-21awk20:15:002
255015699256,17cyclictest2618355-21awk20:15:002
2550154992521,3cyclictest2618581-21kworker/u8:2+events_unbound20:15:231
2550154992521,2cyclictest2726957-21kworker/u8:3+events_unbound00:00:191
2550154992519,4cyclictest2877726-21latency_hist00:25:011
2550154992519,4cyclictest2721806-21apt-get21:55:111
2550150992521,3cyclictest2804628-21kworker/u8:0+events_unbound23:20:140
2550150992521,3cyclictest2726957-21kworker/u8:3+flush-259:022:30:170
2550150992521,3cyclictest2711440-21kworker/u8:4+events_unbound21:45:190
2550150992521,3cyclictest2649175-21kworker/u8:0+events_unbound21:25:190
2550150992519,4cyclictest2675082-21systemd-run21:10:010
2550150992518,5cyclictest2752864-21latency_hist22:25:000
2550160992417,5cyclictest2825144-21ntpq23:30:213
2550160992417,5cyclictest2560435-21latency_hist19:20:003
2550154992421,2cyclictest2596927-21idleruntime-cro19:55:001
2550154992421,2cyclictest2596927-21idleruntime-cro19:55:001
2550150992420,3cyclictest2726957-21kworker/u8:3+events_unbound23:50:210
2550160992319,3cyclictest2862247-21kworker/u8:0+flush-259:000:15:153
2550160992319,3cyclictest2851896-21kworker/u8:2+flush-259:000:25:173
2550160992316,5cyclictest2768330-21latency_hist22:40:003
2550160992316,4cyclictest335557-21systemd-journal23:01:083
2550160992316,4cyclictest2550538-21diskstats19:10:163
2550156992317,4cyclictest335557-21systemd-journal00:27:072
2550154992319,3cyclictest2804628-21kworker/u8:0+events_unbound23:20:181
2550150992319,3cyclictest2851896-21kworker/u8:2+events_unbound00:25:210
2550150992319,3cyclictest2784464-21kworker/u8:2+events_unbound23:00:040
2550150992319,3cyclictest2565566-21kworker/u8:3+events_unbound20:30:230
2550150992319,3cyclictest2565566-21kworker/u8:3+events_unbound19:45:160
2550150992318,3cyclictest2768358-21gpgv22:40:000
2550156992213,8cyclictest2690528-21idleruntime-cro21:25:012
2550154992218,3cyclictest2690539-21kworker/u8:1+flush-259:022:20:171
2550154992218,3cyclictest2586404-21kworker/u8:4+events_unbound19:49:591
2550154992216,4cyclictest2585245-21ntpq19:40:201
2550150992219,2cyclictest2810089-21kworker/u8:1+events_unbound23:35:150
2550150992217,4cyclictest2753105-21kworker/u8:2+events_unbound22:25:180
2550150992215,5cyclictest335557-21systemd-journal20:44:560
2550160992117,2cyclictest2680194-21sh21:15:003
2550160992114,5cyclictest2618348-21latency_hist20:15:013
2550160992114,5cyclictest2618348-21latency_hist20:15:003
2550156992114,5cyclictest335557-21systemd-journal21:16:022
2550154992117,3cyclictest2649175-21kworker/u8:0+flush-259:021:50:141
2550154992117,2cyclictest2851896-21kworker/u8:2+events_unbound00:05:301
2550154992116,4cyclictest2564661-21ntpq19:20:191
255015499210,20cyclictest1-21systemd22:05:001
2550150992118,2cyclictest2726957-21kworker/u8:3+flush-259:023:05:210
2550150992118,2cyclictest2654459-21kworker/u8:2+flush-259:021:10:250
2550150992116,4cyclictest2654459-21kworker/u8:2+flush-259:021:40:260
2550150992114,5cyclictest2778243-21ntpq22:45:210
2550160992014,5cyclictest2574953-21ntpq19:30:193
2550156992017,2cyclictest509-21rs:main2
2550156992014,4cyclictest2737876-21diskstats22:10:132
2550156992014,4cyclictest2664757-21latency_hist21:00:012
2550154992017,2cyclictest2773570-21kworker/u8:0+flush-259:022:50:271
2550154992017,2cyclictest2763211-21kworker/u8:1+flush-259:022:55:181
2550154992016,3cyclictest2810089-21kworker/u8:1+flush-259:023:30:211
2550154992016,3cyclictest2726957-21kworker/u8:3+flush-259:023:15:051
2550154992016,3cyclictest2565566-21kworker/u8:3+flush-259:019:25:201
2550154992014,5cyclictest2819939-21ntpq23:25:211
2550150992017,2cyclictest2726397-21kworker/u8:2+flush-259:022:08:080
2550150992016,3cyclictest2763211-21kworker/u8:1+events_unbound23:11:070
2550150992016,3cyclictest2613198-21kworker/u8:1+events_unbound20:35:180
2550150992016,3cyclictest2602714-21kworker/u8:4+events_unbound20:05:000
2550150992016,3cyclictest2565566-21kworker/u8:3+events_unbound21:30:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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