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2026-04-11 - 06:17

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.
Unexpectedly long latencies may be caused by SMIs
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 Sat Apr 11, 2026 00:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2630162999934,24cyclictest131rcu_preempt19:15:033
2630158997232,37cyclictest2716311-21sh00:14:482
2630158996926,39cyclictest30-21ksoftirqd/223:55:412
2630158996926,39cyclictest30-21ksoftirqd/223:55:402
2630158996832,32cyclictest2706335-21sh23:51:142
2630158996830,32cyclictest2704583-21sh23:47:172
2630158996830,32cyclictest2704583-21sh23:47:162
2630158996822,41cyclictest2636326-21diskmemload23:06:122
2630158996727,36cyclictest2695425-21sh23:25:572
2630158996727,36cyclictest2695425-21sh23:25:572
263015899662,18cyclictest2672320-21ssh22:32:472
263015899661,14cyclictest2722511-21ssh00:29:042
263015899661,14cyclictest2722511-21ssh00:29:042
263015899651,14cyclictest2678837-21ssh22:47:432
263015899651,14cyclictest2678837-21ssh22:47:432
2630158996428,31cyclictest3467602-21systemd-journal19:40:002
2630158996426,34cyclictest2634578-21sed20:35:012
2630158996424,36cyclictest2676638-21sh22:42:432
263015899642,13cyclictest364-21snmpd21:56:172
263015899641,14cyclictest2713928-21ssh00:09:142
263015899641,12cyclictest364-21snmpd20:25:452
2630152996427,32cyclictest12-21ksoftirqd/022:13:330
2630158996324,35cyclictest2636326-21diskmemload22:15:262
263015899632,19cyclictest2636917-21ssh21:11:002
263015899632,13cyclictest2662455-21munin-run22:10:012
2630158996321,39cyclictest30-21ksoftirqd/200:31:212
263015899631,9cyclictest2653143-21ssh21:48:352
263015899631,7cyclictest2718409-21ssh00:19:342
263015299632,10cyclictest2635813-21tr21:00:000
2630158996223,34cyclictest2636326-21diskmemload21:16:432
263015899622,17cyclictest2648486-21ssh21:37:502
263015899622,14cyclictest2643625-21sh21:26:272
263015899621,9cyclictest2726543-21ssh00:38:132
263015899621,9cyclictest2726543-21ssh00:38:132
263015899621,9cyclictest2685692-21ssh23:03:432
263015899621,8cyclictest2683161-21ssh22:57:522
263015899621,8cyclictest2650193-21ssh21:41:352
263015899621,8cyclictest2645555-21ssh21:30:522
263015899621,8cyclictest2645555-21ssh21:30:512
263015899621,7cyclictest2719254-21ssh00:21:092
263015899621,7cyclictest2669639-21ssh22:26:222
2630158996217,41cyclictest1-21systemd21:00:002
263015899621,13cyclictest2691791-21sshd23:17:462
2630158996130,28cyclictest30-21ksoftirqd/219:35:022
263015899612,8cyclictest2659431-21ssh22:02:572
263015899612,15cyclictest2635518-21sshd20:53:302
263015899612,15cyclictest2635518-21sshd20:53:302
263015899611,9cyclictest2693975-21ssh23:22:482
263015899611,8cyclictest2688733-21ssh23:10:312
263015899611,8cyclictest2642432-21ssh21:23:592
263015899611,14cyclictest2674479-21sh22:37:442
263015899611,10cyclictest2654829-21ssh21:52:192
263015899611,10cyclictest2654829-21ssh21:52:192
263015899601,9cyclictest2698946-21ssh23:34:312
263015899601,7cyclictest2701946-21ssh23:41:052
263015899601,7cyclictest2699633-21ssh23:35:392
263015899601,7cyclictest2680652-21ssh22:51:552
263015899601,7cyclictest2664380-21ssh22:14:372
263015899601,6cyclictest2710251-21ssh00:00:132
263015899582,15cyclictest2632956-21munin-run20:05:002
263015899581,8cyclictest2667146-21ssh22:20:352
2630152995827,15cyclictest2694033-21ssh23:22:530
2630152995824,4cyclictest27055611ssh23:49:560
2630152995824,4cyclictest27055611ssh23:49:560
263016299577,6cyclictest131rcu_preempt00:08:143
2630162995738,14cyclictest37-21ksoftirqd/320:15:013
263015899572,6cyclictest2631932-21unin-run19:45:012
263015899571,11cyclictest2630355-21munin-run19:15:012
263015899571,11cyclictest2630355-21munin-run19:15:012
2630162995638,14cyclictest1-21systemd00:00:013
2630162995638,14cyclictest1-21systemd00:00:013
2630162995624,8cyclictest37-21ksoftirqd/321:20:003
263015899562,4cyclictest2635266-21sshd20:48:302
263015899561,12cyclictest364-21snmpd19:53:222
263015899561,11cyclictest2633432-21sshd20:12:302
2630152995626,24cyclictest12-21ksoftirqd/021:27:540
2630152995546,5cyclictest16950irq/224-800000020:20:010
2630152995539,12cyclictest1-21systemd23:15:000
2630152995527,13cyclictest2684307-21ssh23:00:060
263015899542,7cyclictest2634999-21sshd20:40:302
263015899541,9cyclictest2632139-21sshd19:47:042
2630152995430,19cyclictest2636326-21diskmemload21:10:000
2630152995427,12cyclictest2671855-21ssh22:31:320
2630152995427,12cyclictest2656597-21ssh21:56:170
2630152995421,29cyclictest0-21swapper/022:38:310
2630152995420,4cyclictest2710054-21latency_hist00:00:030
2630152995420,4cyclictest2710054-21latency_hist00:00:020
2630152995420,28cyclictest275-21dbus-daemon21:20:010
263016299536,6cyclictest131rcu_preempt22:22:223
2630162995326,22cyclictest37-21ksoftirqd/322:00:023
263015899532,6cyclictest364-21snmpd20:16:382
2630158995325,25cyclictest30-21ksoftirqd/220:25:012
2630158995325,25cyclictest30-21ksoftirqd/220:25:012
263015899532,46cyclictest2630590-21cron19:20:002
263015899531,9cyclictest2630857-21sshd19:22:282
263015899531,6cyclictest364-21snmpd20:35:302
263015899531,6cyclictest364-21snmpd20:35:302
2630158995315,34cyclictest3467562-21sshd19:57:062
2630152995327,11cyclictest2717781-21ssh00:18:050
2630152995325,13cyclictest2645812-21ssh21:31:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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