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2026-05-14 - 17:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.
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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack2slot7s.osadl.org (updated Thu May 14, 2026 12:43:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2957171996122,24cyclictest151ktimers/011:05:540
295717199601,45cyclictest2994661-21ssh09:11:020
2957171995824,31cyclictest2966140-21cron07:40:010
2957173995648,5cyclictest3136516-21unixbench_singl12:06:052
2957172995533,19cyclictest3136426-21sed12:06:041
295717399542,43cyclictest3144056-21ssh12:15:552
2957171995345,5cyclictest3114533-21latency_hist11:40:020
2957172995125,7cyclictest420-21avahi-daemon12:25:291
2957173994838,6cyclictest3013272-21cron09:35:002
2957173994836,9cyclictest3009299-21sh09:30:022
2957173994836,9cyclictest3009299-21sh09:30:022
2957173994636,6cyclictest3132494-21sed12:01:052
2957173994636,6cyclictest3132494-21sed12:01:052
2957173994535,6cyclictest2975170-21systemd-run08:10:012
2957173994535,6cyclictest2975170-21systemd-run08:10:012
2957172994535,7cyclictest420-21avahi-daemon10:40:531
2957171994525,4cyclictest3011218-21unixbench_singl09:31:030
2957172994436,5cyclictest3013287-21idleruntime-cro09:35:001
2957172994436,5cyclictest3005249-21cron09:25:011
2957172994335,5cyclictest2976668-21systemd-run08:15:011
2957172994334,6cyclictest3163077-21latency_hist12:40:051
2957172994333,7cyclictest3031015-21processes09:56:001
295717399427,7cyclictest171rcu_preempt10:05:532
2957173994232,6cyclictest3001397-21latency_hist09:20:022
2957173994231,7cyclictest420-21avahi-daemon10:31:002
2957172994234,5cyclictest0-21swapper/108:00:011
2957171994235,4cyclictest3038147-21aten_r2power_cu10:05:390
2957173994131,6cyclictest3075902-21unixbench_multi10:51:032
295717199412,35cyclictest3067331-21ssh10:40:560
2957173994032,5cyclictest2985651-21sh08:45:012
2957173994031,5cyclictest0-21swapper/212:20:422
2957173994029,4cyclictest0-21swapper/210:40:542
2957173994026,11cyclictest3054977-21needreboot10:25:502
2957172994034,3cyclictest0-21swapper/109:40:001
2957173993933,3cyclictest0-21swapper/210:15:012
2957173993931,5cyclictest3074016-21ssh10:50:012
2957172993931,4cyclictest0-21swapper/111:15:021
2957172993930,6cyclictest421-21dbus-daemon12:31:321
2957172993930,4cyclictest0-21swapper/109:25:571
2957172993930,4cyclictest0-21swapper/109:25:571
2957171993932,5cyclictest3131437-21fschecks_time12:00:460
2957171993932,5cyclictest3131437-21fschecks_time12:00:460
2957171993931,5cyclictest3037570-21idleruntime-cro10:05:010
2957171993928,8cyclictest421-21dbus-daemon12:24:340
2957171993928,8cyclictest12350irq/32-eth010:55:540
2957171993924,10cyclictest12350irq/32-eth009:40:540
2957171993917,6cyclictest12450irq/33-eth011:00:530
2957173993832,3cyclictest0-21swapper/211:30:532
2957173993825,10cyclictest2972975-21needreboot08:00:482
2957172993830,5cyclictest2985589-21unixbench_singl08:41:031
2957172993829,6cyclictest3049722-21sendmail10:20:011
2957172993826,9cyclictest3098258-21awk11:20:001
2957172993826,9cyclictest3098258-21awk11:20:001
2957171993830,5cyclictest2982669-21systemd-run08:35:010
2957171993823,12cyclictest2993147-21diskmemload11:30:440
295717199381,31cyclictest3022697-21ssh09:45:520
2957173993730,4cyclictest3151639-21fschecks_time12:25:442
2957173993727,6cyclictest261-21systemd-journal11:09:282
295717299373,27cyclictest2998512-21ssh09:15:521
2957172993728,4cyclictest0-21swapper/110:35:561
2957172993728,4cyclictest0-21swapper/110:35:561
295717299371,28cyclictest3103743-21ssh11:26:001
295717199374,26cyclictest3119863-21ssh11:45:590
2957171993732,4cyclictest2957170-21cyclictest10:40:020
2957171993732,4cyclictest2957170-21cyclictest10:40:020
2957171993730,4cyclictest3106336-21systemd-run11:30:010
2957171993729,6cyclictest2127843-21cups-browsed10:51:100
2957171993715,17cyclictest2127839-21cupsd09:05:560
295717199371,29cyclictest3115789-21sh11:40:550
2957173993628,5cyclictest3158802-21cron12:35:012
2957173993627,3cyclictest0-21swapper/210:35:582
2957173993627,3cyclictest0-21swapper/210:35:582
2957173993624,4cyclictest0-21swapper/209:44:292
2957173993618,13cyclictest1-21systemd11:15:022
2957172993628,5cyclictest3142650-21grep12:15:001
2957172993628,5cyclictest3122456-21cron11:50:011
2957172993628,4cyclictest0-21swapper/111:35:511
2957172993627,5cyclictest0-21swapper/111:30:521
295717199365,21cyclictest12350irq/32-eth012:15:530
2957171993629,4cyclictest421-21dbus-daemon09:16:030
2957171993627,6cyclictest2127843-21cups-browsed12:36:290
2957171993627,6cyclictest2127843-21cups-browsed11:24:020
2957171993627,3cyclictest0-21swapper/010:30:510
2957171993626,7cyclictest3140947-21sshd12:11:450
2957171993623,2cyclictest0-21swapper/009:35:450
2957173993528,4cyclictest2965184-21fschecks_time07:35:442
2957173993528,3cyclictest0-21swapper/209:55:552
2957173993527,5cyclictest1-21systemd11:16:002
2957173993527,5cyclictest1-21systemd11:16:002
2957173993526,5cyclictest0-21swapper/209:50:012
2957173993525,6cyclictest3139288-21aten_r2power_fr12:10:422
2957173993520,9cyclictest2993147-21diskmemload10:15:532
2957173993519,10cyclictest1054-21mta-sts-daemon11:20:512
2957173993515,15cyclictest2127843-21cups-browsed11:00:542
295717299357,19cyclictest2994742-21awk09:11:031
2957172993527,5cyclictest3074893-21fschecks_time10:50:451
2957172993527,5cyclictest3027394-21unixbench_singl09:51:031
2957172993526,6cyclictest3134597-21systemd12:05:021
2957172993526,6cyclictest3134597-21systemd12:05:021
2957172993526,6cyclictest2981177-21systemd-run08:30:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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