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2026-05-01 - 23:11

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 Fri May 01, 2026 12:45:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
484727999622,5cyclictest16850irq/134-800000011:05:010
484727998626,13cyclictest511079-21ssh09:56:220
484727998527,26cyclictest541659-21ssh11:07:050
484727998428,11cyclictest546254-21ssh11:17:470
484727998417,56cyclictest16850irq/134-800000009:51:110
484727998229,12cyclictest514479-21ssh10:04:260
484727998228,12cyclictest538251-21ssh10:59:270
484727998228,12cyclictest538251-21ssh10:59:270
48472799822,40cyclictest495252-21sh09:20:000
48472799812,40cyclictest517878-21ssh10:12:050
48472799781,39cyclictest575878-21ssh12:26:090
48472799771,39cyclictest562077-21ssh11:54:360
484727997712,6cyclictest16850irq/134-800000009:39:530
484727997625,15cyclictest501020-21ssh09:33:100
484734997518,34cyclictest487019-21kworker/u8:207:55:022
484727997537,4cyclictest16950irq/224-800000010:45:020
484727997522,10cyclictest1-21systemd09:10:010
484727997435,4cyclictest16950irq/224-800000012:05:000
484727997434,4cyclictest16950irq/224-800000010:35:090
484727997414,17cyclictest16850irq/134-800000011:23:560
48472799741,33cyclictest487797-21/usr/sbin/munin08:10:010
484727997326,14cyclictest521973-21ssh10:21:190
484727997318,6cyclictest16850irq/134-800000012:20:220
484727997316,19cyclictest16850irq/134-800000009:49:590
484727997313,16cyclictest16850irq/134-800000011:25:180
484727997313,16cyclictest16850irq/134-800000011:25:170
484734997230,38cyclictest3467602-21systemd-journal10:30:322
484734997226,40cyclictest275-21dbus-daemon09:50:012
484727997235,4cyclictest16950irq/224-800000012:35:020
484727997218,17cyclictest16850irq/134-800000011:55:440
484727997218,17cyclictest16850irq/134-800000011:55:440
48472799721,58cyclictest534219-21sh10:50:010
484727997116,18cyclictest16850irq/134-800000012:09:430
484727996827,13cyclictest552270-21ssh11:31:320
484734996721,13cyclictest30-21ksoftirqd/212:36:202
48472799675,21cyclictest16850irq/134-800000011:15:020
484734996617,10cyclictest0-21swapper/212:35:022
484730996640,18cyclictest275-21dbus-daemon09:10:011
484727996621,11cyclictest571807-21ssh12:16:510
484734996532,28cyclictest30-21ksoftirqd/211:10:012
484727996517,16cyclictest16850irq/134-800000011:41:350
484734996421,5cyclictest490578-21latency_hist09:00:022
484734996418,10cyclictest566513-21sshd12:04:542
48472799645,34cyclictest16850irq/134-800000012:37:020
48472799645,18cyclictest52407450ssh10:26:180
484727996417,40cyclictest3467602-21systemd-journal08:20:010
484734996326,5cyclictest274-21cron12:00:002
484734996326,5cyclictest274-21cron12:00:002
484734996325,16cyclictest275-21dbus-daemon10:15:012
484727996314,16cyclictest516527-21ssh10:09:160
484734996227,32cyclictest567086-21sh12:05:442
484734996125,5cyclictest499854-21sh09:30:152
484734996123,9cyclictest30-21ksoftirqd/208:25:002
484734996123,4cyclictest519664-21sh10:16:032
484734996123,10cyclictest30-21ksoftirqd/211:01:392
484727996111,18cyclictest16850irq/134-800000009:21:540
484727996111,17cyclictest16850irq/134-800000009:41:300
484734996027,28cyclictest1-21systemd09:15:012
484734996024,5cyclictest544897-21sh11:14:492
484734996022,5cyclictest545489-21sh11:15:512
484734996020,11cyclictest488113-21sort08:15:002
484727996030,13cyclictest559260-21ssh11:47:580
484734995918,9cyclictest30-21ksoftirqd/211:33:592
484727995929,14cyclictest519966-21ssh10:16:530
484734995850,5cyclictest538540-21kworker/2:112:10:572
484734995825,6cyclictest30-21ksoftirqd/212:17:352
484734995822,11cyclictest30-21ksoftirqd/212:27:322
484727995828,13cyclictest569374-21ssh12:11:090
484734995722,4cyclictest503868-21latency_hist09:40:022
484734995718,8cyclictest30-21ksoftirqd/210:20:022
484734995717,10cyclictest530282-1kworker/u9:210:44:412
484734995619,9cyclictest30-21ksoftirqd/209:27:592
484734995525,7cyclictest30-21ksoftirqd/211:29:142
484734995525,7cyclictest30-21ksoftirqd/211:29:142
48473499552,22cyclictest3467602-21systemd-journal09:55:012
484734995517,9cyclictest530282-1kworker/u9:210:45:102
484730995531,19cyclictest275-21dbus-daemon11:55:001
484734995429,22cyclictest30-21ksoftirqd/208:35:022
484734995429,22cyclictest30-21ksoftirqd/208:35:022
484734995417,10cyclictest30-21ksoftirqd/210:09:422
484730995437,13cyclictest555770-21cron11:40:001
484730995437,13cyclictest555770-21cron11:40:001
484730995433,15cyclictest1-21systemd07:35:011
484727995424,26cyclictest534439-21ssh10:50:060
484734995324,4cyclictest512508-21latency_hist10:00:022
484734995320,10cyclictest489561-21cat08:40:022
484730995324,20cyclictest275-21dbus-daemon10:05:011
484727995318,31cyclictest16850irq/134-800000009:13:270
484727995318,30cyclictest16850irq/134-800000009:27:320
484734995232,15cyclictest3467602-21systemd-journal07:35:002
484734995225,7cyclictest30-21ksoftirqd/210:50:362
484734995216,10cyclictest30-21ksoftirqd/211:22:462
484730995237,10cyclictest488318-21systemctl08:20:011
484730995231,12cyclictest485192-21sendmail07:20:001
484740995139,8cyclictest490392-21run-parts09:00:003
484740995120,17cyclictest37-21ksoftirqd/308:30:023
484734995143,5cyclictest488350-21kworker/2:310:58:112
484734995143,5cyclictest488350-21kworker/2:310:58:112
484734995123,9cyclictest30-21ksoftirqd/207:20:032
484734995123,9cyclictest30-21ksoftirqd/207:20:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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