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2026-09-04 - 10:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Fri Sep 04, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4101386997363,7cyclictest275-21systemd-journal19:40:000
4101386996455,6cyclictest4187877-21latency_hist20:35:010
4101388995853,4cyclictest68128-21kworker/u8:0+flush-8:022:22:451
4101388995751,4cyclictest207675-21kworker/u8:0+events_unbound00:25:001
4101388995751,4cyclictest207675-21kworker/u8:0+events_unbound00:25:001
4101388995750,5cyclictest4113228-21kworker/u8:2+events_unbound21:52:421
4101391995648,6cyclictest237773-21cp00:40:002
4101388995547,6cyclictest4153394-21/usr/sbin/munin20:02:451
4101386995547,6cyclictest88229-21kworker/u8:3+flush-8:023:19:590
4101386995547,6cyclictest4113228-21kworker/u8:2+flush-8:020:17:300
4101388995247,4cyclictest68128-21kworker/u8:0+events_unbound22:17:321
4101388995242,8cyclictest275-21systemd-journal00:20:001
4101391995140,8cyclictest103482-21cp22:25:012
4101388995045,4cyclictest197009-21kworker/u8:1+events_unbound00:07:421
4101388995039,9cyclictest275-21systemd-journal21:35:011
4101388994942,5cyclictest4157924-21kworker/u8:3+events_unbound21:42:381
4101388994942,5cyclictest128260-21kworker/u8:2+flush-8:023:32:401
4101391994836,9cyclictest38858-21awk21:20:002
4101388994743,3cyclictest4118619-21kworker/u8:0+events_unbound20:32:371
4101388994741,4cyclictest4113228-21kworker/u8:2+events_unbound20:27:421
4101386994740,5cyclictest203196-21/usr/sbin/munin00:07:430
41088752460,1sleep14108876-21/usr/sbin/munin19:17:281
4101388994642,3cyclictest122902-21kworker/u8:1+events_unbound22:47:301
4101388994640,5cyclictest68128-21kworker/u8:0+flush-8:022:07:451
4101388994640,5cyclictest3964904-21kworker/u8:1+events_unbound19:12:411
4101388994640,5cyclictest217422-21kworker/u8:3+flush-8:000:37:471
4101388994640,4cyclictest4157924-21kworker/u8:3+events_unbound21:12:401
4101386994642,3cyclictest68128-21kworker/u8:0+flush-8:022:42:310
4101386994639,5cyclictest182646-21latency_hist23:45:000
4101386994636,8cyclictest236947-21ntpq00:37:430
4101388994540,4cyclictest88229-21kworker/u8:3+events_unbound23:37:471
4101388994538,5cyclictest197009-21kworker/u8:1+flush-8:000:02:471
4101388994536,7cyclictest142320-21ntpq23:02:381
4101386994537,6cyclictest67679-21ntpq21:47:400
4101386994536,7cyclictest108891-21diskstats22:32:300
822882440,4sleep10-21swapper/122:02:371
4101388994438,5cyclictest4113228-21kworker/u8:2+events_unbound21:27:411
4101388994438,4cyclictest88229-21kworker/u8:3+flush-8:023:12:291
4101386994438,4cyclictest4113228-21kworker/u8:2+flush-8:020:27:310
4101388994339,3cyclictest8753-21kworker/u8:1+flush-8:021:57:321
4101386994334,7cyclictest183569-21diskstats23:47:300
4101388994237,4cyclictest128260-21kworker/u8:2+flush-8:023:57:441
4101388994236,4cyclictest4113228-21kworker/u8:2+flush-8:019:37:351
4101388994236,4cyclictest207675-21kworker/u8:0+flush-8:000:32:411
4101388994236,4cyclictest207675-21kworker/u8:0+flush-8:000:32:411
4101386994233,6cyclictest63551-21latency_hist21:45:010
4101391994131,7cyclictest4162875-21awk20:10:002
4101388994137,3cyclictest168037-21kworker/u8:0+events_unbound23:47:351
4101388994136,4cyclictest2762707-21kworker/u8:4+flush-8:019:22:291
4101388994135,4cyclictest4113228-21kworker/u8:2+flush-8:021:22:401
4101388994132,7cyclictest13672-21latency_hist20:55:001
4101391994028,9cyclictest4188554-21diskstats20:37:292
4101388994036,3cyclictest207675-21kworker/u8:0+events_unbound00:30:001
4101388994035,4cyclictest153005-21kworker/u8:1+flush-8:023:17:391
4101388994035,3cyclictest4118619-21kworker/u8:0+flush-8:019:52:351
4101391993930,7cyclictest23563-21apt-get21:05:012
4101388993932,5cyclictest4123119-21grep19:27:471
4101386993933,5cyclictest128260-21kworker/u8:2+flush-8:023:15:000
4101386993933,4cyclictest207675-21kworker/u8:0+flush-8:000:35:000
4101386993933,4cyclictest207675-21kworker/u8:0+flush-8:000:35:000
4101388993833,4cyclictest68128-21kworker/u8:0+flush-8:022:27:411
4101388993833,3cyclictest4157924-21kworker/u8:3+flush-8:021:47:431
4101388993833,3cyclictest4118619-21kworker/u8:0+events_unbound20:07:331
4101388993833,3cyclictest197009-21kworker/u8:1+flush-8:000:12:351
4101388993831,5cyclictest4157924-21kworker/u8:3+flush-8:021:17:481
4101386993831,5cyclictest138158-21latency_hist23:00:010
4101388993732,3cyclictest128260-21kworker/u8:2+flush-8:022:57:421
4101388993730,5cyclictest88229-21kworker/u8:3+flush-8:022:42:411
4101388993729,6cyclictest132990-21apt-get22:55:001
4101388993729,4cyclictest108568-21kworker/u8:2+flush-8:022:37:431
4101388993727,8cyclictest275-21systemd-journal23:55:001
4101386993727,8cyclictest275-21systemd-journal20:40:000
4101386993727,7cyclictest128030-21latency_hist22:50:010
4101388993632,3cyclictest4157924-21kworker/u8:3+events_unbound20:17:431
4101388993631,4cyclictest4118619-21kworker/u8:0+flush-8:019:57:401
4101388993631,3cyclictest4113228-21kworker/u8:2+events_unbound20:37:321
4101388993629,5cyclictest275-21systemd-journal23:06:551
4101388993628,6cyclictest24203-21/usr/sbin/munin21:07:451
4101388993529,4cyclictest4113228-21kworker/u8:2+flush-8:020:57:351
4101388993528,6cyclictest108568-21kworker/u8:2+flush-8:022:32:341
4101388993528,5cyclictest275-21systemd-journal20:21:551
4101388993526,7cyclictest167083-21ntpq23:27:411
4101386993531,2cyclictest33756-21base6421:15:010
4101386993527,6cyclictest4105521-21ntpq19:12:390
4101386993527,6cyclictest275-21systemd-journal19:16:560
410138699350,33cyclictest1-21systemd21:59:550
4101391993426,6cyclictest133252-21cat22:55:012
4101391993419,9cyclictest88649-21apt-get22:12:282
4101391993416,11cyclictest4193266-21taskset20:42:282
4101391993416,11cyclictest4193266-21taskset20:42:282
4101388993430,3cyclictest4118619-21kworker/u8:0+events_unbound19:32:311
4101388993428,5cyclictest4113228-21kworker/u8:2+events_unbound21:37:451
4101388993428,3cyclictest4113228-21kworker/u8:2+events_unbound22:15:001
4101386993427,5cyclictest3964904-21kworker/u8:1+flush-8:019:42:290
410139199339,12cyclictest192110-21ntpq23:52:412
4101391993317,10cyclictest4148443-21apt-get19:57:282
4101388993329,3cyclictest4157924-21kworker/u8:3+events_unbound20:47:361
4101388993329,3cyclictest4157924-21kworker/u8:3+events_unbound20:47:361
4101388993328,4cyclictest4157924-21kworker/u8:3+flush-8:020:42:421
4101388993328,4cyclictest4157924-21kworker/u8:3+flush-8:020:42:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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