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2026-09-10 - 18:27

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Thu Sep 10, 2026 12:45:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
215989991229,4cyclictest131rcu_preempt09:35:012
215980997549,23cyclictest12-21ksoftirqd/012:04:020
215989997152,15cyclictest3467602-21systemd-journal10:00:012
21598099687,4cyclictest12-21ksoftirqd/009:10:020
21598099687,4cyclictest12-21ksoftirqd/009:10:010
215980996722,38cyclictest12-21ksoftirqd/010:05:030
21598099632,3cyclictest131rcu_preempt11:41:550
215989996151,7cyclictest209883-21kworker/2:210:20:032
215980996132,10cyclictest3467602-21systemd-journal12:09:240
215980996114,4cyclictest12-21ksoftirqd/011:35:020
215985996020,5cyclictest131rcu_preempt11:13:311
21598099603,34cyclictest131rcu_preempt12:19:080
215980996031,14cyclictest291187-21ssh11:38:040
21598099602,39cyclictest131rcu_preempt12:10:270
215980996023,33cyclictest1-21systemd12:25:020
215980996023,33cyclictest1-21systemd12:25:020
215985995915,5cyclictest131rcu_preempt11:40:021
215980995923,32cyclictest269779-21sh10:51:540
215980995919,34cyclictest16850irq/134-800000011:55:020
215980995917,33cyclictest16850irq/134-800000012:35:580
21598099581,41cyclictest314096-21ssh12:27:070
215980995812,20cyclictest131rcu_preempt08:50:010
215989995736,13cyclictest1-21systemd11:55:012
21598999571,5cyclictest3467718-21lldpd09:21:212
215985995714,6cyclictest131rcu_preempt09:50:021
215985995710,7cyclictest131rcu_preempt07:20:021
215993995610,6cyclictest131rcu_preempt08:25:003
215989995648,5cyclictest240856-21kworker/2:010:44:112
21598599567,10cyclictest23-21ksoftirqd/112:40:021
215980995611,41cyclictest12-21ksoftirqd/009:17:340
215989995546,5cyclictest240856-21kworker/2:010:27:192
215989995546,5cyclictest240856-21kworker/2:010:27:192
215989995536,14cyclictest3467602-21systemd-journal08:30:002
215985995536,15cyclictest3467602-21systemd-journal07:30:011
215985995536,15cyclictest3467602-21systemd-journal07:30:001
215985995523,12cyclictest23-21ksoftirqd/109:51:191
215980995529,11cyclictest286699-21ssh11:28:200
215980995528,12cyclictest295522-21ssh11:47:180
215980995526,14cyclictest283308-21ssh11:20:470
215989995445,6cyclictest274296-21kworker/2:111:47:022
215989995438,12cyclictest3467602-21systemd-journal09:00:012
215989995438,12cyclictest3467602-21systemd-journal09:00:002
215985995418,6cyclictest131rcu_preempt10:15:021
215980995429,11cyclictest252488-21ssh10:14:580
215980995413,36cyclictest0-21swapper/011:01:460
215993995337,12cyclictest3467602-21systemd-journal11:40:003
215989995345,5cyclictest209883-21kworker/2:209:37:122
215989995344,5cyclictest240856-21kworker/2:010:46:262
215985995312,6cyclictest131rcu_preempt10:10:021
21598099534,5cyclictest131rcu_preempt10:16:120
215980995323,15cyclictest243211-21ssh09:55:010
215980995318,31cyclictest16850irq/134-800000009:26:370
215980995316,20cyclictest16850irq/134-800000011:10:110
215980995315,4cyclictest12-21ksoftirqd/009:48:320
21598099531,37cyclictest244019-21ssh09:56:270
215993995215,6cyclictest131rcu_preempt10:00:013
215989995244,5cyclictest240856-21kworker/2:011:04:062
215989995242,6cyclictest274296-21kworker/2:111:27:102
215985995211,6cyclictest131rcu_preempt12:04:291
215985995210,6cyclictest131rcu_preempt12:33:231
215985995210,5cyclictest131rcu_preempt11:27:331
215985995210,11cyclictest23-21ksoftirqd/110:46:281
21598099522,9cyclictest121ksoftirqd/010:42:250
215980995220,16cyclictest317145-21ssh12:33:450
215980995217,31cyclictest16850irq/134-800000009:35:430
215980995216,32cyclictest16850irq/134-800000011:07:030
215980995216,32cyclictest16850irq/134-800000010:48:220
215980995216,32cyclictest16850irq/134-800000010:30:030
215980995216,32cyclictest16850irq/134-800000010:30:030
215980995216,32cyclictest16850irq/134-800000010:02:400
215980995216,32cyclictest16850irq/134-800000010:02:390
215980995215,33cyclictest16850irq/134-800000010:35:020
215993995129,16cyclictest275-21dbus-daemon09:50:023
215989995143,5cyclictest274296-21kworker/2:112:15:022
215989995143,5cyclictest240856-21kworker/2:010:10:442
215989995142,6cyclictest240856-21kworker/2:011:15:012
215989995142,5cyclictest222172-21kworker/2:109:27:412
215989995132,14cyclictest275-21dbus-daemon11:35:012
21598599517,18cyclictest131rcu_preempt11:50:011
215985995136,12cyclictest1-21systemd12:00:011
215985995115,7cyclictest23-21ksoftirqd/109:45:021
215985995113,6cyclictest131rcu_preempt09:40:021
215985995110,6cyclictest131rcu_preempt12:20:481
215985995110,6cyclictest131rcu_preempt12:20:471
21598099519,18cyclictest221349-21kworker/u8:109:00:030
21598099519,18cyclictest221349-21kworker/u8:109:00:020
21598099518,29cyclictest16850irq/134-800000009:10:120
215980995124,12cyclictest301215-21ssh11:59:480
215980995115,32cyclictest16850irq/134-800000010:21:010
21599399506,5cyclictest131rcu_preempt09:45:033
215989995043,4cyclictest222172-21kworker/2:109:14:292
215989995042,5cyclictest274296-21kworker/2:111:20:292
215989995042,5cyclictest240856-21kworker/2:010:52:132
215989995041,6cyclictest222172-21kworker/2:109:41:322
215989995034,12cyclictest3467602-21systemd-journal07:30:012
215989995034,12cyclictest3467602-21systemd-journal07:30:002
21598999502,3cyclictest131rcu_preempt11:08:262
215980995042,4cyclictest16950irq/224-800000010:40:010
215980995037,8cyclictest12-21ksoftirqd/008:39:590
215980995023,12cyclictest231888-21ssh09:30:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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